What are the main diffrences between the corvette and iroc TPI's, other than the injectors, let me know, is there any performance differences in them, or preference. also i noticed the corvette one has a lower profile on the front of the plenum. ill try to get pics.

thanks

Kevin

 

i got my old tpi manifold off the ta i sell ya cheap if ya want it..

just add a tb and sensors and ya set! i even still have the fuel rails.

 

sorry i dont think i need anymore for the time being, i have 3.

 

The corvette L98 engine has aluminum heads. as for the tpi, i don't think the vettes have MAF...i think that is about the only main difference. correct me if i am wrong. =)

Josh (new guy)

 

Josh,
The vettes did use the MAF system as well.

deepstage69,
The only differences in the TPI units themselves was that the vettes used a slightly different baseplate for EGR reasons and kept the early head style bolt pattern that mate with the aluminum heads. The injectors were the same if you were to compare them to the L98 F- bodys and the vette runners were only different by having a texture on them that only came on some of the F-bodys. I think that is it but someone please correct me if I am wrong.

 

No differences in the TPI system. They also used 22# Fuel Injectors. Again If it off a Corvette it must be better, A Myth.

 

Some of you are mostly right, most of you aren't.

The 85 Vette used 24lb/hr injectors and lower fuel pressure. All other vettes used 22lb/hr injectors, just like the L98 f-bodies.

All vettes and f-bodies used MAF from 85-89, and speed density from 90-91 for the Vette, 90-92 for the f-body. 92 was the first year for the LT1 in the Vette.

All vettes & fbodies used the same computer as each other, although the vette showed a different part number later on because it had a weatherpack connection & housing due to being under the hood, not under the dash.

The vettes used a different intake manifold, as mentioned above. This was due to a different EGR arrangement. The Vette intakes always used the old style head-bolt angle on the center bolts of the intake. All L98 f-bodies used the centerbolt style head bolt angle.

The Vettes had a different fuel rail. The rails themselves were the same, but the shape of where the fuel lines attach is different because the vette fuel lines run up the passenger side of the car.

PROM programming is different.

Wiring harness is different.

The Vettes had an oil pressure sensor signal that the ECM monitored. The f-body did not have this.

Runners were different, as mentioned above, but the differences were cosmetic only. I believe a lot of the 92 f-bodies got the left over Vette runners.

The distributer cover was different. On the Vettes it was aluminum, and on the f-body it was plastic. Likewise, the bolts that held it to the plenum were different. On the f-body, they had large washers that were not on the bolts used on the Vette cover.

The distributer was different from 87 on. The Corvette always used the large cap distributer. In 87 the f-body converted to the small cap distributer with the remote coil.

 

The question was about the TPI system being the same. Not the whole History of the Corvette.

 

Are you for real? I just love it when my help is so well appreciated.

Everything I posted is TPI related. What the hell exactly is your problem? Just because your answer was ignorant and incorrect doesn't make me the bad guy here.

 

Jim "know it all"85IROC
:hail: :hail: :hail: For all your wisdom on all car matters. A simple question only requires a short reply Not a Book on the subject.

 

I really don't think this is something to argue about. This place really get's pathetic sometimes!!

 

You don't have to be bitter because your answer was incomplete and incorrect.

 

A simple question still deserves a complete and correct answer, neither of which were provided by your reply.

If somebody buys a TPI setup off a vette and tries to run it on their f-body, and they follow your half-assed answer they could wind up with a bunch of junk they can't use. Lose the attitude. I'm not posting here because I get a hard-on when my fingers smash into the keyboard. I post here to help people out when I can, and hopefully receive some help when I need it. When I see somebody else providing false or incorrect information, you can bet your *** that I'm going to make it known before somebody winds up in a mess because he had bad info.

Get off your soap box dude. I provided useful, necessary information. If you can't understand that, why waste your time and ours with your ignorant responses?

 

youre an idiot

 

[QUOTE]Originally posted by DJP87Z28
No differences in the TPI system. They also used 22# Fuel Injectors. Again If it off a Corvette it must be better, A Myth. [/

QUOTE]

Ok Mr Man what is incorrect about this reply.:hail: :hail:

 

OK thanks guys, thanks for the history too.

 

[QUOTE]Originally posted by DJP87Z28

Quote:

Originally posted by DJP87Z28
No differences in the TPI system. They also used 22# Fuel Injectors. Again If it off a Corvette it must be better, A Myth. [/

QUOTE]

Ok Mr Man what is incorrect about this reply.:hail: :hail:

are you seriously that stupid? "No differences in the TPI system". No, none except for the laundry list that I posted.

 

You're all a bunch of dorks. Jim is obviously right. Anybody that wasting time to bitch about him being right is just being gay. And being gay is evil. And besides, it's just piossing people off and making this whole damn thread gay. Who cares. Answer has been posted. Searches will yield pretty much what jim said.

Anybody wonder why we say do searches? Saves peopel arguing who's more correcter and stuff. Drink beer, eat poontang