TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Another Badass TBI motor! - im finished!

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Old Aug 29, 2005 | 09:43 PM
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Another Badass TBI motor! - im finished!

What i started with....
Attached Thumbnails Another Badass TBI motor! - im finished!-engin1.jpg  
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Old Aug 29, 2005 | 09:46 PM
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Wow there was an engine under there?
Attached Thumbnails Another Badass TBI motor! - im finished!-en.jpg  
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Old Aug 29, 2005 | 09:48 PM
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So heres the specs,
90k L03,
Stock bottom end and heads (for now)
Unlimted TBI mods
TBI spacer
Edlelbrock Performer RPM intake
Compcam lifters and push rods
460"/450" lift cam shaft
MSD 6AL ignition box
MSD Blaster coil
Morso 8mm wires,
Accle distributor
Flow tech headers
Flow tech y-pipe
Flowmaster 2.50" catback
Flowmaster muffler
Electric water pump

some of this i already had on the engine,
now for the big hurdle! tuning! i got all the stuff to do it now i got to make some time,
I plan on having it dyno after i feel my tuning is right on, next mods hummm i got a rear disc 3.27 Limted slip laying on the garage floor along with tubuler LCA's and Panhard bar that might find its way under the camaro sometime.... and if everythig goes well my next step is, well you'll have to wait and see but it should Boost up the power tho
Attached Thumbnails Another Badass TBI motor! - im finished!-en4.jpg  

Last edited by NEEDforSPEED; Aug 29, 2005 at 09:50 PM.
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Old Aug 29, 2005 | 10:12 PM
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From: Mesa, AZ
Car: A Camaro
Engine: Weak
Transmission: Weaker
Looks like fun man, so what accessories are you still driving? Just the P/S pump and the Alt?

Tony
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Old Aug 29, 2005 | 10:19 PM
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you got it
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Old Aug 30, 2005 | 12:40 PM
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From: Lake Bluff
Car: 1992 RS Camaro
Engine: 305
Transmission: 700R4
Axle/Gears: 2.73
Nice job! What heads are you planing? Just curious. Later.
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Old Aug 30, 2005 | 02:39 PM
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thanks!

i was thinking WorldProducts Torquer heads, maybe WPT 305 heads but the gains would be minimum to say the least, and i can fork my money on something better but if i run across some 081s then im most likely going to use them on the 305 after i fully port them, but my plans are still unchanged for right now like i said, so heads are out of the question till i get everything else set up "you'll have to wait and see but it should Boost up the performance though"

Last edited by NEEDforSPEED; Aug 30, 2005 at 02:45 PM.
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Old Aug 30, 2005 | 02:51 PM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Looks like a nice combo you have there. I am really happy to hear that you will be doing the chip work. You will be incredibly happy when you are done. Don't worry if you motor barely idles as is with the stock tune. You may want to look into a better fuel pump and larger injectors. You may find that you won't have enough fuel once you get into the tuning.
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Old Aug 31, 2005 | 01:31 AM
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thanks
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Old Sep 4, 2005 | 05:27 AM
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she runs, mmmmmm i love this sound
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Old Sep 12, 2005 | 09:15 PM
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i think i kinda have an idea of what i want to do next, but anyone else want to give me some ideas?
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Old Sep 12, 2005 | 09:32 PM
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From: Chicago, IL
Car: 91 Camaro RS Convertible
Engine: 305 TBI
Transmission: 5-Speed
Axle/Gears: 3.42
You'll notice a huge difference with some gears out back. What are teh specs on that cam you put in there? I'd probably put the gears in next, then subframe connectors and a new fuel pump.
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Old Sep 12, 2005 | 09:58 PM
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From: Arcadia ,Ca
Car: 82 firebird s/e 83 Trans Am
Engine: 5.0L 305ci 4b carb.....CFI
Transmission: TH200C....700R4
wow,very nice.My engine looks like the b4 pic.Maybe theres an engine under mine too
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Old Sep 12, 2005 | 11:20 PM
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From: Chouteau, OK
Car: Bitchin' 92 RS
Engine: 350 TPI
Transmission: 700R4
What kind of gains did you see with the 6AL box?
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Old Sep 13, 2005 | 03:15 AM
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Originally posted by BronYrAur
You'll notice a huge difference with some gears out back. What are teh specs on that cam you put in there? I'd probably put the gears in next, then subframe connectors and a new fuel pump.
heres the specs for the cam
dur - 230/208 lift - .450/.460 center - 116
ya my next plan is to do the SFC for sure, i might put my 3.27 rearend in there but im not sure yet all this will have to be this winter or next year.... any recommendation for FP?
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Old Sep 13, 2005 | 03:27 AM
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thanks 82knightrider

Originally posted by RebelRacer
What kind of gains did you see with the 6AL box?
since i did a lot of my mods all at once its hard to say.... but i know that mpg is slightly increased, there is no power picked up, but much qucker starts and i have a rev-limiter witch really works nice
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Old Sep 13, 2005 | 01:10 PM
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From: Chicago, IL
Car: 91 Camaro RS Convertible
Engine: 305 TBI
Transmission: 5-Speed
Axle/Gears: 3.42
Originally posted by NEEDforSPEED
heres the specs for the cam
dur - 230/208 lift - .450/.460 center - 116
ya my next plan is to do the SFC for sure, i might put my 3.27 rearend in there but im not sure yet all this will have to be this winter or next year.... any recommendation for FP?
Yeah that's a mild cam, does it run ok on your stock tune? I would be sure to do the gears asap one of the biggest SOTP differences you'll get.

As for FP I would recommend either a Walbro 190 or 255. I personally like the 190 for TBI apps. It seems that many CAN run the 255 but I've still heard some saying pressure went up and they couldn't drop it down far enough, for that reason I'd stick with a 190 personally, My $.02
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Old Sep 13, 2005 | 08:13 PM
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i borke the one of the pins off of the stock chip so i have no clue if it wound have
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Old Sep 14, 2005 | 07:41 PM
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Engine: Gen I 408
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Originally posted by NEEDforSPEED
thanks 82knightrider



since i did a lot of my mods all at once its hard to say.... but i know that mpg is slightly increased, there is no power picked up, but much qucker starts and i have a rev-limiter witch really works nice
multiple-spark boxes tend to give you a bit on the low end in terms of torque but as your rpm increases the box can't really keep up with the demand for multiple sparks and ends up giving a single spark per cycle. buddy at my school ran his car on the dyno before and after in his pickup and gained 15 ft/lbs with a 6A box.
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Old Sep 14, 2005 | 07:50 PM
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thats BS, iv seen them dyno, and only picked up less then 2 ft/tq
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Old Sep 14, 2005 | 09:04 PM
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Originally posted by NEEDforSPEED
thats BS, iv seen them dyno, and only picked up less then 2 ft/tq


You won't see much over a properly functioning ignition system. I have good wires, a quality cap and rotor, and a MSD Blaster Coil (because I had it). I also have the MSD 6 series with the timing box. (It came from my engines carbed days, but works equally well when rewired for the later distributer). The only reason I added the MSD was for the variable timing feature. I set the initial timing with the dial set at 7.5*, I can add 7.5* timing or subtract 7.5* at a touch of a dial on the fly. Greatly helps while trying to dial in an engine. A quick touch of the dial will tell you if you need more/less timing and how much. Easy to dial in part throttle cruise timing with this. It works equally well for track runs. Bump the timing 2* at a time until it loses mph, then back off 1/2 degree at a time until it runs the fastest. It also lets me select the octane I want to run on. When I run premium I can just bump the timing up a little. While pulling a trailer it started to detonate a little on 89, I pulled a little timing. In the mountains I started to lose a little power and idle quality, a little more advance helped alot.

Last edited by Fast355; Sep 14, 2005 at 09:08 PM.
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Old Sep 21, 2005 | 12:30 AM
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im really curious to see what this is going to do in the 1/4 if i hook up right,
iv gutted 125lbs or more, driveline 700r4 with shift kit, 2.73 rear with 255's and the above engine mods....
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Old Sep 21, 2005 | 01:02 PM
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Transmission: Weaker
Should be a fun ride, but you'll definitely love the car ten times more with some 3.42's or 3.73's in there. Good luck man.
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Old Sep 21, 2005 | 11:52 PM
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indeed, i plan to slap in the 3.27 limted slip i got laying on the floor sometime, but my next move is some SFC
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Old Sep 22, 2005 | 01:21 AM
  #25  
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From: Albany, NY Area
Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
did you buy that piece to seal off your air cleaner from the engine compartment... or did you fabricate it yourself?
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Old Sep 22, 2005 | 01:59 AM
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Fab'ed it, like always i took that seal off a 80's caprice the part that the goes between the hood and the firewall lip.... vary simple and works vary well
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Old Sep 22, 2005 | 02:02 AM
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i also used the air cleaner lid off that caprice but i plasma it so it was smaller around
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Old Sep 22, 2005 | 02:10 AM
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Originally posted by NEEDforSPEED
thanks!

i was thinking WorldProducts Torquer heads, maybe WPT 305 heads but the gains would be minimum to say the least, and i can fork my money on something better but if i run across some 081s then im most likely going to use them on the 305 after i fully port them, but my plans are still unchanged for right now like i said, so heads are out of the question till i get everything else set up "you'll have to wait and see but it should Boost up the performance though"
I ran the WP 305 heads on my old L03. The big difference between 081s and the WP heads is there's way more meat to port on the WP heads, they also have screw in studs and WP has refined the intake ports to reduce a little bit of valve shroud. If you can find a used set (I already sold mine), they will be way better than 081's.
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Old Sep 23, 2005 | 05:55 AM
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indeed better, but much more money then i plan to thorw at my l03
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