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iTrader: (3)
Joined: Aug 2002
Posts: 237
Likes: 1
From: Southern California
Car: '98 Z28 LS1
Engine: LS1
Transmission: 4l60E
Axle/Gears: 373
So your planning a TBI - TPI swap? Been there, done that 4 times! My last one was on a '89 Camaro RS with a 305ci TBI. I swapped a 91 Corvette L98 motor with TPI into the RS and ran into all kind of problems. If your going to do the swap try and make sure the donor car is the same year as your own. If not then your looking at many items to change.
If your just thinking of swapping the TBI from your car with a TPI unit then it's not to bad. First you must change the fuel pump inside your tank to that of a TPI. pressure requirement is much higher for the TPI than the TBI. Next you will need a wire harness for the TPI. You can buy a complete TPI harness from Painless for about $260. through Summit. Then you'll need a differant computer chip (Prom). Make sure your donor TPI comes with all of the sensors, TPS, Air, Canister, egr Negative or Positive type, MAT, Maf or Mass and Transmission cable to throttle body cable, and accelerator cable. And more will be needed to make it run right. The job is expensive and if you don't mind my suggestion would be to beef up your TBI with a Fuel Pressure Regulator lArger TBI injectors run dual air inlets into the Throttle body and a few more trick mods all for less than half of what the TPI will cost you. Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
If your just thinking of swapping the TBI from your car with a TPI unit then it's not to bad. First you must change the fuel pump inside your tank to that of a TPI. pressure requirement is much higher for the TPI than the TBI. Next you will need a wire harness for the TPI. You can buy a complete TPI harness from Painless for about $260. through Summit. Then you'll need a differant computer chip (Prom). Make sure your donor TPI comes with all of the sensors, TPS, Air, Canister, egr Negative or Positive type, MAT, Maf or Mass and Transmission cable to throttle body cable, and accelerator cable. And more will be needed to make it run right. The job is expensive and if you don't mind my suggestion would be to beef up your TBI with a Fuel Pressure Regulator lArger TBI injectors run dual air inlets into the Throttle body and a few more trick mods all for less than half of what the TPI will cost you. Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
Thread Starter
Member
Joined: Mar 2002
Posts: 227
Likes: 0
From: Hanover Park, IL
the thing is my buddy did a 89 iroc w/ a 355 and gears. yeah the thing made around 400 flywheel horse, but it was a pain in the butt. It ran like crap until he dumped some major cash into it...i don't have that. I have enough for the tpi setup and i can do it relatively easily. I have access to every scan tool imagianeable as well as a dyno and tons of tools. It's the only reason i considered it. I just wanted to know how hard it was and if anyone did it , if so if you've got some tips to make it go easier i would greatly appreciate it.
thanx chris
thanx chris
Member
Joined: Oct 1999
Posts: 381
Likes: 0
From: mission hills ,ca
Originally posted by CALIROCZ28
So your planning a TBI - TPI swap? Been there, done that 4 times! My last one was on a '89 Camaro RS with a 305ci TBI. I swapped a 91 Corvette L98 motor with TPI into the RS and ran into all kind of problems. If your going to do the swap try and make sure the donor car is the same year as your own. If not then your looking at many items to change.
If your just thinking of swapping the TBI from your car with a TPI unit then it's not to bad. First you must change the fuel pump inside your tank to that of a TPI. pressure requirement is much higher for the TPI than the TBI. Next you will need a wire harness for the TPI. You can buy a complete TPI harness from Painless for about $260. through Summit. Then you'll need a differant computer chip (Prom). Make sure your donor TPI comes with all of the sensors, TPS, Air, Canister, egr Negative or Positive type, MAT, Maf or Mass and Transmission cable to throttle body cable, and accelerator cable. And more will be needed to make it run right. The job is expensive and if you don't mind my suggestion would be to beef up your TBI with a Fuel Pressure Regulator lArger TBI injectors run dual air inlets into the Throttle body and a few more trick mods all for less than half of what the TPI will cost you. Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
So your planning a TBI - TPI swap? Been there, done that 4 times! My last one was on a '89 Camaro RS with a 305ci TBI. I swapped a 91 Corvette L98 motor with TPI into the RS and ran into all kind of problems. If your going to do the swap try and make sure the donor car is the same year as your own. If not then your looking at many items to change.
If your just thinking of swapping the TBI from your car with a TPI unit then it's not to bad. First you must change the fuel pump inside your tank to that of a TPI. pressure requirement is much higher for the TPI than the TBI. Next you will need a wire harness for the TPI. You can buy a complete TPI harness from Painless for about $260. through Summit. Then you'll need a differant computer chip (Prom). Make sure your donor TPI comes with all of the sensors, TPS, Air, Canister, egr Negative or Positive type, MAT, Maf or Mass and Transmission cable to throttle body cable, and accelerator cable. And more will be needed to make it run right. The job is expensive and if you don't mind my suggestion would be to beef up your TBI with a Fuel Pressure Regulator lArger TBI injectors run dual air inlets into the Throttle body and a few more trick mods all for less than half of what the TPI will cost you. Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
The problem is that either you are wrong or nobody has ever done it right.
Thread Starter
Member
Joined: Mar 2002
Posts: 227
Likes: 0
From: Hanover Park, IL
the motor is a .040 over 350 w/ forged pistons and a mild cam. the heads have been redone w/ new valves.....(not sure of the size but they're bigger than the 305 ones) and an LT1 crank. It's nothin' fancy but i'm hopeing for 250-350 at the tires with the new gear.(3.23)
am i dreaming or doesit sound possible.....
chris
am i dreaming or doesit sound possible.....
chris
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Joined: Apr 2002
Posts: 67
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From: bayville, nj
Originally posted by CALIROCZ28
Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
please explain what "done right" means, because i am confused as hell. are we talking a worked 350 tbi v. stock high mileage 305 tpi?
Member
iTrader: (3)
Joined: Aug 2002
Posts: 237
Likes: 1
From: Southern California
Car: '98 Z28 LS1
Engine: LS1
Transmission: 4l60E
Axle/Gears: 373
Don't you believe it! I was talking a stock swap setup not Hi-PO pistons 40 over or anything. Just a swop to TPI from TBI. In comparison to what the final costs on the complete swap would be. Example he could take his Throttle body setup and install a used Multipoint system such as an Eldelbrock.
Get fuel economy, power, and performance at an affordable price.
These Multi-Point EFI systems are designed for Chevy and GMC engines with OEM throttle body fuel injection or carburetors. The kits for carburetors are supplied as complete units and include the computer, wiring harnesses, a calibration module, an ignition amplifier, and a distributor conversion kit. The TBI kits include everything in the carb kits except the throttle body and the computer. They inject fuel directly into the head for ideal fuel distribution and efficiency. Edelbrock uses the highest quality Pico injectors, CNC-machined aluminum fuel rails, and high pressure fuel regulator and lines, with a computer chip that is calibrated to your vehicle based on information you send back to Edelbrock, prior to receiving.
This my friends, will run circles around a stock TPI as well as many slightly modified ones as well. Do the the same engine work and compare timeslips. Doing this is still about one half the cost of doing a complete TPI conversion providing a used Multipoint can be found. Anyone who has done a TBI to TPI conversion from scratch knows what the final costs can add up to. I know because I have done a few from scratch. Don't get me wrong gentlemen I love my TPI car's but I wished I had gone the other way on my last one I did. Many advantages to one of these units. Unless you have done a few you would not understand.
I own 4 Camaro's an '89 RS TBI 305c.i. converted to A TPI with a '91 Corvette L98, Headers, Head work, Big mouth manifold from TPIS, extensive plenum, runner porting and many more mods.
an '85 IrocZ28, a '95 V6 3800 223 dynoed horepower run's low 14's at 99 miles per hour and last and my second favorite of all is my a '98 Z28 that runs low 12's just slightly modified. Ran 13.40's right from the factory.
Here's another option for his TBI
900 cfm, 350 to 500 HP, Commander 950 TBI system
Now you can get the horsepower and driveability benefits of EFI for your carbureted V8 with a Holley Commander 950 throttle body injection system. This system is a speed density type system, that means it improves performance at cruising RPM's and throttle response. It also accepts engine modifications like a bigger cam, headers, etc. But the big deal is that the system is fully programable. It gives you total control over fuel and timing curves via a laptop computer. It features a four injector throttle body unit with a progressive linkage, Commander 950 ECU, MAP and oxygen sensors, Idle Air Control motor, inline fuel pump, wiring harness, and installation hardware.
Do the math!
Get fuel economy, power, and performance at an affordable price.
These Multi-Point EFI systems are designed for Chevy and GMC engines with OEM throttle body fuel injection or carburetors. The kits for carburetors are supplied as complete units and include the computer, wiring harnesses, a calibration module, an ignition amplifier, and a distributor conversion kit. The TBI kits include everything in the carb kits except the throttle body and the computer. They inject fuel directly into the head for ideal fuel distribution and efficiency. Edelbrock uses the highest quality Pico injectors, CNC-machined aluminum fuel rails, and high pressure fuel regulator and lines, with a computer chip that is calibrated to your vehicle based on information you send back to Edelbrock, prior to receiving.
This my friends, will run circles around a stock TPI as well as many slightly modified ones as well. Do the the same engine work and compare timeslips. Doing this is still about one half the cost of doing a complete TPI conversion providing a used Multipoint can be found. Anyone who has done a TBI to TPI conversion from scratch knows what the final costs can add up to. I know because I have done a few from scratch. Don't get me wrong gentlemen I love my TPI car's but I wished I had gone the other way on my last one I did. Many advantages to one of these units. Unless you have done a few you would not understand.
I own 4 Camaro's an '89 RS TBI 305c.i. converted to A TPI with a '91 Corvette L98, Headers, Head work, Big mouth manifold from TPIS, extensive plenum, runner porting and many more mods.
an '85 IrocZ28, a '95 V6 3800 223 dynoed horepower run's low 14's at 99 miles per hour and last and my second favorite of all is my a '98 Z28 that runs low 12's just slightly modified. Ran 13.40's right from the factory.
Here's another option for his TBI
900 cfm, 350 to 500 HP, Commander 950 TBI system
Now you can get the horsepower and driveability benefits of EFI for your carbureted V8 with a Holley Commander 950 throttle body injection system. This system is a speed density type system, that means it improves performance at cruising RPM's and throttle response. It also accepts engine modifications like a bigger cam, headers, etc. But the big deal is that the system is fully programable. It gives you total control over fuel and timing curves via a laptop computer. It features a four injector throttle body unit with a progressive linkage, Commander 950 ECU, MAP and oxygen sensors, Idle Air Control motor, inline fuel pump, wiring harness, and installation hardware.
Do the math!
I'm lucky mine came as a TPI setup,
But I do know it can be hard as hell to find a donor car (especially a TPI). Check out the towing companies, around here they have an auction once a month for all the abandoned cars, you might get lucky there.
Hell it might make more sense to get a donor car that came with a 350, build it over time & then swap it all in. But hey if he really wanted more horse's hed get the Holley Stealth Ram (drolling & waiting)
But I do know it can be hard as hell to find a donor car (especially a TPI). Check out the towing companies, around here they have an auction once a month for all the abandoned cars, you might get lucky there.
Hell it might make more sense to get a donor car that came with a 350, build it over time & then swap it all in. But hey if he really wanted more horse's hed get the Holley Stealth Ram (drolling & waiting)
Member
Joined: Oct 1999
Posts: 381
Likes: 0
From: mission hills ,ca
Originally posted by CALIROCZ28
Don't you believe it! I was talking a stock swap setup not Hi-PO pistons 40 over or anything. Just a swop to TPI from TBI. In comparison to what the final costs on the complete swap would be. Example he could take his Throttle body setup and install a used Multipoint system such as an Eldelbrock.
Get fuel economy, power, and performance at an affordable price.
These Multi-Point EFI systems are designed for Chevy and GMC engines with OEM throttle body fuel injection or carburetors. The kits for carburetors are supplied as complete units and include the computer, wiring harnesses, a calibration module, an ignition amplifier, and a distributor conversion kit. The TBI kits include everything in the carb kits except the throttle body and the computer. They inject fuel directly into the head for ideal fuel distribution and efficiency. Edelbrock uses the highest quality Pico injectors, CNC-machined aluminum fuel rails, and high pressure fuel regulator and lines, with a computer chip that is calibrated to your vehicle based on information you send back to Edelbrock, prior to receiving.
This my friends, will run circles around a stock TPI as well as many slightly modified ones as well. Do the the same engine work and compare timeslips. Doing this is still about one half the cost of doing a complete TPI conversion providing a used Multipoint can be found. Anyone who has done a TBI to TPI conversion from scratch knows what the final costs can add up to. I know because I have done a few from scratch. Don't get me wrong gentlemen I love my TPI car's but I wished I had gone the other way on my last one I did. Many advantages to one of these units. Unless you have done a few you would not understand.
I own 4 Camaro's an '89 RS TBI 305c.i. converted to A TPI with a '91 Corvette L98, Headers, Head work, Big mouth manifold from TPIS, extensive plenum, runner porting and many more mods.
an '85 IrocZ28, a '95 V6 3800 223 dynoed horepower run's low 14's at 99 miles per hour and last and my second favorite of all is my a '98 Z28 that runs low 12's just slightly modified. Ran 13.40's right from the factory.
Here's another option for his TBI
900 cfm, 350 to 500 HP, Commander 950 TBI system
Now you can get the horsepower and driveability benefits of EFI for your carbureted V8 with a Holley Commander 950 throttle body injection system. This system is a speed density type system, that means it improves performance at cruising RPM's and throttle response. It also accepts engine modifications like a bigger cam, headers, etc. But the big deal is that the system is fully programable. It gives you total control over fuel and timing curves via a laptop computer. It features a four injector throttle body unit with a progressive linkage, Commander 950 ECU, MAP and oxygen sensors, Idle Air Control motor, inline fuel pump, wiring harness, and installation hardware.
Do the math!
Don't you believe it! I was talking a stock swap setup not Hi-PO pistons 40 over or anything. Just a swop to TPI from TBI. In comparison to what the final costs on the complete swap would be. Example he could take his Throttle body setup and install a used Multipoint system such as an Eldelbrock.
Get fuel economy, power, and performance at an affordable price.
These Multi-Point EFI systems are designed for Chevy and GMC engines with OEM throttle body fuel injection or carburetors. The kits for carburetors are supplied as complete units and include the computer, wiring harnesses, a calibration module, an ignition amplifier, and a distributor conversion kit. The TBI kits include everything in the carb kits except the throttle body and the computer. They inject fuel directly into the head for ideal fuel distribution and efficiency. Edelbrock uses the highest quality Pico injectors, CNC-machined aluminum fuel rails, and high pressure fuel regulator and lines, with a computer chip that is calibrated to your vehicle based on information you send back to Edelbrock, prior to receiving.
This my friends, will run circles around a stock TPI as well as many slightly modified ones as well. Do the the same engine work and compare timeslips. Doing this is still about one half the cost of doing a complete TPI conversion providing a used Multipoint can be found. Anyone who has done a TBI to TPI conversion from scratch knows what the final costs can add up to. I know because I have done a few from scratch. Don't get me wrong gentlemen I love my TPI car's but I wished I had gone the other way on my last one I did. Many advantages to one of these units. Unless you have done a few you would not understand.
I own 4 Camaro's an '89 RS TBI 305c.i. converted to A TPI with a '91 Corvette L98, Headers, Head work, Big mouth manifold from TPIS, extensive plenum, runner porting and many more mods.
an '85 IrocZ28, a '95 V6 3800 223 dynoed horepower run's low 14's at 99 miles per hour and last and my second favorite of all is my a '98 Z28 that runs low 12's just slightly modified. Ran 13.40's right from the factory.
Here's another option for his TBI
900 cfm, 350 to 500 HP, Commander 950 TBI system
Now you can get the horsepower and driveability benefits of EFI for your carbureted V8 with a Holley Commander 950 throttle body injection system. This system is a speed density type system, that means it improves performance at cruising RPM's and throttle response. It also accepts engine modifications like a bigger cam, headers, etc. But the big deal is that the system is fully programable. It gives you total control over fuel and timing curves via a laptop computer. It features a four injector throttle body unit with a progressive linkage, Commander 950 ECU, MAP and oxygen sensors, Idle Air Control motor, inline fuel pump, wiring harness, and installation hardware.
Do the math!
What , did you cut and paste from Edelbrocks site?
Secondly the holley TBI systems are just about a wash with a good carb system as far as power goes and will make less lowend torque than a port injection system and cost more than swapping runners and bases on a TPI system. So there goes that argument.
Member
Joined: Oct 1999
Posts: 381
Likes: 0
From: mission hills ,ca
Originally posted by CALIROCZ28
. Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
. Modification of the TBI if done right will exceed that of the TPI in performance output, horsepower, torque and fuel economy.
Originally posted by CALIROCZ28
Don't you believe it! I was talking a stock swap setup not Hi-PO pistons 40 over or anything. Just a swop to TPI from TBI. In comparison to what the final costs on the complete swap would be. Example he could take his Throttle body setup and install a used Multipoint system such as an Eldelbrock.
Don't you believe it! I was talking a stock swap setup not Hi-PO pistons 40 over or anything. Just a swop to TPI from TBI. In comparison to what the final costs on the complete swap would be. Example he could take his Throttle body setup and install a used Multipoint system such as an Eldelbrock.
EDL-3500 Chevrolet: 1986 and earlier, small block V8 5.7L, multi-point EFI system ... $1,939.00
EDL-3501 Chevrolet/GMC: 1993-95 5.7L trucks, 2V, idle to 5,500 rpm, Performer Multi-Point EFI system ... $999.95
EDL-3502 Chevrolet/GMC: 1987-1992, 5.7L C/K pickup, Suburban, Blazer/Jimmy/Yukon, TBI to multi-point EFI system convers... $929.95
EDL-3503 Chevrolet: 1957-1986 262-400, 2V, 750 cfm, idle to 5,500 rpm, up to 350 HP, Performer Pro-Flo EFI system ... $1,899.00
EDL-3505 Chevrolet/GMC: 1987-92 5.0L/5.7L trucks, 2V, idle to 5,500 rpm, Performer Multi-Point EFI system ... $961.39
EDL-3550 Chevrolet: 1957-1986 396-502, 4V, 1,000 cfm, 1,500 to 7,000 rpm, 600 plus HP, oval port, Performer Pro-Flo EFI... $2,256.95
HLY-950-21S 900 cfm, 350 to 500 HP, Commander 950 TBI system ... $1,399.95
HLY-950-22S 700 cfm, 225 to 400 HP, Commander 950 TBI system ... $1,349.95
HLY-950-23S 650 cfm, 150 to 300 HP, Commander 950 TBI system ... $1,329.95
HLY-502-20S AMC, GM, Chrysler, Ford: V8s, up to 275 HP, 670 cfm Pro-Jection 2 barrel, bright finish, digital fuel injectio... $749.95
HLY-91003101 Chevrolet: 265-400, 350-450 HP, MPI Pro-Jection II System ... $2,299.95
Yep , do the math
Thread Starter
Member
Joined: Mar 2002
Posts: 227
Likes: 0
From: Hanover Park, IL
hey guys before we all try to kill each other......I just wanna know if it can be done in a reasonable amount of time...ie 2-3 weeks....I'm not worried about the benifits....the idea is to mke the car seem like a STOCK z28...not some fancy race machine o better yet a car that LOOKS like i've dumped a ton of money into...the susp. is basically stock(boxed control arms and panhard rod w/polyurethane all around) and the onl noticably differences are the TD performance v/c's and the flowmaster exhaust...It's not a matter of gains....those will be worries down the line not now....
thanxs for ideas but i'm more concerned at the time aspect right now.
chris
thanxs for ideas but i'm more concerned at the time aspect right now.
chris
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Hey CalIROC, what part of SoCal are you from? I'd like to meet you and discuss this more with you, as well as invite you to join the local thirdgen club. See the SoCal forum on this message board for more info, if you havent already.
FakeZCar, my dad converted his 92 RS over from TBI to TPI, added the Z28 wing, and then a 350 engine, and is running a best of 13.70 @ 100 MPH. When he first converted, he went from 158 RWHP to 175 RWHP, and 220 RWTQ to 290 RWTQ. This was the stock 305 TBI engine, stock TBI heads, stock TBI cam, stock TBI exhaust, etc. It went a best of 14.94, faster than many modded TBI's. You can reuse your TBI harness if you repin it for the TPI computer, and add in the injector plugs.
As far as TBI making more power, more gas mileage, etc, see the above for my dad's results. Also, he gained about 2-3 MPG with the TPI setup.
FakeZCar, my dad converted his 92 RS over from TBI to TPI, added the Z28 wing, and then a 350 engine, and is running a best of 13.70 @ 100 MPH. When he first converted, he went from 158 RWHP to 175 RWHP, and 220 RWTQ to 290 RWTQ. This was the stock 305 TBI engine, stock TBI heads, stock TBI cam, stock TBI exhaust, etc. It went a best of 14.94, faster than many modded TBI's. You can reuse your TBI harness if you repin it for the TPI computer, and add in the injector plugs.
As far as TBI making more power, more gas mileage, etc, see the above for my dad's results. Also, he gained about 2-3 MPG with the TPI setup.
Thread Starter
Member
Joined: Mar 2002
Posts: 227
Likes: 0
From: Hanover Park, IL
Kevin91Z thanks for the stats...I'm actually at a hod right now. I had the motor in the car and ready to go but it didn't fire...( I bought the short block off of a couple of friends and it turns out it wasn't put together correctly. soI pulled it AGAIN ....talk about a pain.) I finallysaid screw it and I'm putting in a TPI setup. I figured getting a setup with the harness is the best idea because i don't need to worry about missing something. Besides how easy is it t wire in the injectors?? Maybe i found an "easy" way out. Do the Tps' use the same connectors? If I can I would think it would be easier to swap pins.(I have unlimited access to schematics.) Is it as easy as swapping terminal pins and wiring in the injectors???I'd love to know more details about what you're telling me. By the way did your dad go that route or did he swap the entire harness? Thanxs for the great intel though.
P.S. my cam is unknw to me and Summit..it's got
CPS...BS...15...049...CPS...BS...115...049
stamped aound the cam itself....anyone know what this is??? I need to find out the specs and I REALLY DON'T want to do it manually....
any help is appreciated..
CHRIS
P.S. my cam is unknw to me and Summit..it's got
CPS...BS...15...049...CPS...BS...115...049
stamped aound the cam itself....anyone know what this is??? I need to find out the specs and I REALLY DON'T want to do it manually....
any help is appreciated..
CHRIS
TGO Supporter
Joined: Oct 2000
Posts: 1,231
Likes: 0
From: Wilmington NC
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
Originally posted by Kevin91Z
Hey CalIROC, what part of SoCal are you from? I'd like to meet you and discuss this more with you, as well as invite you to join the local thirdgen club. See the SoCal forum on this message board for more info, if you havent already.
FakeZCar, my dad converted his 92 RS over from TBI to TPI, added the Z28 wing, and then a 350 engine, and is running a best of 13.70 @ 100 MPH. When he first converted, he went from 158 RWHP to 175 RWHP, and 220 RWTQ to 290 RWTQ. This was the stock 305 TBI engine, stock TBI heads, stock TBI cam, stock TBI exhaust, etc. It went a best of 14.94, faster than many modded TBI's. You can reuse your TBI harness if you repin it for the TPI computer, and add in the injector plugs.
As far as TBI making more power, more gas mileage, etc, see the above for my dad's results. Also, he gained about 2-3 MPG with the TPI setup.
Hey CalIROC, what part of SoCal are you from? I'd like to meet you and discuss this more with you, as well as invite you to join the local thirdgen club. See the SoCal forum on this message board for more info, if you havent already.
FakeZCar, my dad converted his 92 RS over from TBI to TPI, added the Z28 wing, and then a 350 engine, and is running a best of 13.70 @ 100 MPH. When he first converted, he went from 158 RWHP to 175 RWHP, and 220 RWTQ to 290 RWTQ. This was the stock 305 TBI engine, stock TBI heads, stock TBI cam, stock TBI exhaust, etc. It went a best of 14.94, faster than many modded TBI's. You can reuse your TBI harness if you repin it for the TPI computer, and add in the injector plugs.
As far as TBI making more power, more gas mileage, etc, see the above for my dad's results. Also, he gained about 2-3 MPG with the TPI setup.
Member
iTrader: (3)
Joined: Aug 2002
Posts: 237
Likes: 1
From: Southern California
Car: '98 Z28 LS1
Engine: LS1
Transmission: 4l60E
Axle/Gears: 373
[QUOTE]Originally posted by Kevin91Z
[B]Hey CalIROC, what part of SoCal are you from? I'd like to meet you and discuss this more with you, as well as invite you to join the local thirdgen club. See the SoCal forum on this message board for more info, if you havent already.
Hi Kevin, I recently bought a house in Rosemead , but I was in the Covina area for the past 18 years. Let me know when and where your next meeting will be and I'll try and attend.
As far as this post goes there was some confusion to what the original question was and my comments were targeted at other options other than having only one to go with.
[B]Hey CalIROC, what part of SoCal are you from? I'd like to meet you and discuss this more with you, as well as invite you to join the local thirdgen club. See the SoCal forum on this message board for more info, if you havent already.
Hi Kevin, I recently bought a house in Rosemead , but I was in the Covina area for the past 18 years. Let me know when and where your next meeting will be and I'll try and attend.
As far as this post goes there was some confusion to what the original question was and my comments were targeted at other options other than having only one to go with.
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