Anybody else mess around with the G-Tech meter? I've checked mine with a stopwatch and I believe in it. I think it's a valuable tool and besides I've had a lot of fun with it.

Evel lives. Here's an excerpt from "Idle chatter/Jay Heath/Vette mag. 84-96... the last corvette that seemed like it might kill you at any moment. c5/c6 ...inspire infinite confidence w/ effortless performance and smooth quiet competence, piloting a 53-96 model has always carried with it the faintest whiff of mortal danger.

I'll leave runner length out of the equation, because my hurried experiment proved inconclusive. But, c.c. I'm picturing the efficiency of my shop vac on blower mode, small dia. hose vs. large. Now if I triple the air output, the small hose reaches its limit and the large one excells. yes?

These volumes comprise my c4 library. Always looking for more. 91 complete shop manual. Haynes manual, Mclellan-Corvette from the Inside, t.p.i.s. insider hints, Antonick-Vette specs 84-96, Newton-101 vette projects 84-96, Watson-How to tune and modify Chev. fuel injection, Howell Service man. for lt1 and tpi engines, Brooklands books- High perf. vettes 83-89 (road and comparison tests from various magazines).

Nice to know the runners need not be removed.

Thanks so much for putting that in laymans terms.You've also explained away my sinus condition.

Will someone explain why long L98 style intake runners produce more torque and shorter Lt1 style produce more H.P.and evidently breath better at higher rpm? thanks

I am awed by the amount of freely given knowledge on this site and better yet I am having fun. kudos

"The ECMcontrols the enegergizing of the injectors... On the PFI and TPI apps., the injectors are synchronized to primary ignition and open once every crankshaft rev." Watson.

According to the 1987 book "How to bypass emission controls" with a c4 on the cover no less, gutting the air pump is discussed. I took mine apart and whereas they talk about the "shaft" my 91 has a different mechanical system that appears to be tamper proof.

Under low light conditions, the interior lights stay on for 20 seconds after closing the doors/hatch on my 91. I had aproblem where they wouldn't shut off. It turned out to be a relay under the dash near the glovebox that was sticking. You can hear it.

No, I'm totally new to this computer stuff. My 91 tuorquoise coupe is my first Corvette. I thought I was through with the car hobby, but it's in my blood. I never really considered a Vette, but in the year and a half I've owned mine, well my wife says I'm obsessed. I say I'm living my dream.I hope to learn everything there is to know about the c4. They are fascinating! Happy trails.

Thanks, I'm beginning to see the light.

Amen See How to tune and modify Chevrolet fuel injection by Ben Watson pub 1997 page 39 1st paragraph for his explanation.

oh well...I suppose it wouldn't be a whole lot different than the short runner lt1 style manifolds offered by some of the other manufacturers anyway. Besides, the l98 manifold is so kickass looking, who would want to change it? Think I'll go with the tpis large tube runners, base and finish my plenum porting job next time it's off if the bbk is dead in the water.

aw shucks fellas, thanks

Has anyone checked out the new bbk intake to be released soon for the tpi? It's amazing to me(course I'm easily amazed) that new products are still being developed for this motor. Looks funky . Iam considering one once I find out if the #'s are really there.

for what it's worth, i talked with bob at tpis as i have several of their products on my car including their level III chip. he said "put em on. you might have to dropthe fuel pressure a touch (i'm pushing 48# now), the o2 sensor won't even notice the difference"

Your words were verified by Mr. "sick racing" himself. Thanks again, Mekanic.

accel lists their injectors at 24# 85-93 26# 94-96. My car is mild mod. w\no cats flowmasters ,tpis III chip TCI and all the little stuff. 13.8@102. If the injectors fit, will they affect perf.? ECM? O2sens? I can have them for free.

thanks for the info and offer. i willkeep it in mind

are 95-96 injectors a direct swap into my 91 tpi? if not, what? i have a line on an almost new balanced set and mine are no longer in spec on ohms. thanks. by the way, new member, first post, fairly computer illiterate but working on it.