Im making a list of the things i should do to get the most horsies out of what i have..

I thinking about cleaning the fuel injectors since I cant afford to get new ones yet...they havnt been cleaned since the block was put together.

Anyone know how or w/ what I should clean them with? or the process?

also the basic filters and liquids check.

just making a list...everyones two cents is welcome..

 

when i put my crate engine in, heres what i replaced with new parts:

MAF (Mass Air)
CTS (Coolant Temp) in front side of intake
TPS (Throttle Position)
o2 (Oxygen Sensor)
IAT (Intake Air Temp)
Ignition Module
Pick-Up Coil
Rapid Fire Sparkplugs
8.8mm plug wires
"Hi-Performance" distributor cap and rotor
Accel Hi-Po Coil
Accel 24# injectors
Both air filters
Fuel filter
Fuel pump


its ran like a champ from day one and im pushing ~20k miles so far


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1989 Chevy Camaro IROC-Z L98 A4 Black Ext./Grey Int.
SDPC2000 H.O. TPI Crate Engine
2.77:1 Gears

1989 Chevy Corvette L98 A4 Black/Black Coupe
Stock 95k miles
3.07:1 Gears

the vette is faster, i guess due to wieght and gearing.

 

feel a big difference w/ the 24# injectors?

pretty easy to change right?

o2 sensors,,,heard of em..how many are there? know about what they may cost?

 

i dont know about the difference in the 24#ers. my old motor had the stock injectors and i put the new injectors on with the new motor. you have 1 oxygen sensor, on the drivers side exaust downpipe just below the exaust manifold. i think they are around 15 bucks.

 

I switched to the 24lb injectors earlier this week and I'm flooding bad. I am not sure yet what happened as I haven't messed with it yet since. I don't know if I need a new chip or not for the switch but if I had it to do over I think I would have stayed with the stock injectors after a good cleaning and matching from cruzin'.

Jeff

 

do you have an adjustable fuel pressure regulator?

i should probably upgrade teh ignition as well...anyone using MSD or similar ignition box?

if so..how are they working for you?

 

For a place to start, look at the tech article here entitled "Suggested mods for TPI engines".

There is a place in the chip for injector size. If you change injectors, you should get a custom chip to reflect that change, or you will run rich.

The best deal on injector cleaning is at http://www.cruzinperformance.com/


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

Kevin

Thanks for the injector page.

the company is in MI so that works out great.

 

I have the MSD Digital-6 and it's awesome. I use it in conjuction with my nitrous system for the retard function. I highly recommend MSD 6 series ignitions.

Jeff

BTW: Thanks for the chip info, I'm buying the stuff now for burning my own.

 

how much did it cost for the ignition?

 

Send the injectors to TPIS, Street & Performance to get them cleaned RIGHT and flow matched. The stock 22# will support well over 400 hp, by adjusting the pressure up.

 

Send them to TPIS (a company known for their outlandish prices)? Why do that when cruzin' is just fine?

------------------
1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley module, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Streetdampr, Ruger P95DC, hot wife, new oil filter, !cats, !TBC, !AIR.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

I have the stock injectors for an 85 Z...

the TPI set up was thrown on top of an 91 Z71 block...

I think I have 19# injectors...If anyone knows otherwise tell me...

again thanks for everyones help...

 

CTS (Coolant Temp) in front side of intake
TPS (Throttle Position)
o2 (Oxygen Sensor)
IAT (Intake Air Temp)
Ignition Module
Pick-Up Coil
Accel Hi-Po Coil

I have an idea of what these are and where they are located...

what exactly will upgrading these do?

Im car-tarded mostly...

whats the diff between the coils?

I know ones in the distributor...

and a bad O2 sensor will cause what?

thanks for your help..

Z

 

Do you still have your original MAF sensor? Was it working when you removed it? Has it been modified at all (screens, etc)? If it's a good, stock, Bosch hot wire MAF, I WANT IT. I removed my screens and wish I hadn't...



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'87 IROC 5.7l TPI - original owner!

 

the old one had the screens removed..and was dead..the new one has the screens removed to...why?

shouldnt mater...i think..

 

The consensus seems to be that removing the screens is a mistake. In some cases it will cause few problems; in some cases it will cause many. Either way, it messes up the calibration and makes tuning more difficult. Apparently, it results in no performance improvement. If your airflow demands are so great that the screens are truly creating a restriction, you need to be looking elsewhere for a solution (aftermarked MAF, switch to speed density, etc.).



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'87 IROC 5.7l TPI - original owner!

 

one another note...

very lucky to be an original owner of your car..

wish i was old enough to have bought mine original...;P