I had both on my car.
I like the TPI for the hi-tech look.




The entire carb setup was under $500 for all new parts.
The TPI swap was about $1200 or so.

With the carb setup and stock exhaust, I ran a 14.94 @ 91.67mph

With the stock TPI setup, Crane Cam, MSD, SLP intake, 52mm TB, ffull 3" catback and dynomax headers, & non-functioning eeprom, I ran a 14.1 @ 99mph. Imagine if the chip were working.

 

eight tenths is a nice improvement. Good job.
I think we're getting a little off track here. We're here to answer this guy's question.


What's he telling us?
1) He's familiar with carbs, and unfamiliar with TPI
2) Can't afford to do TPI the way he'd want it

To me, I'd say the answer is carb. But that does not preclude a future "upgrade" to tpi. Get a carb now, save up for more mods in the future, and in the meantime you can learn about TPI. Then decide if you want to get it or not.

 

if you peak power at 5000 rpm, TPI would be perfect, efficient, tunable by computer, and very torquey. If you seek any kind of power past that, TPI is not gonna let you make it, neither will an improper carb intake manifold. if it were up to me, I'd use the extra money and get the aftermarket FI unit, its more efficient, better performing, and maintains a very sleek, clean, late model look.

 

I shoulda spent put the $75 twords a used ECM and map sensor, and spent an hour repinning your harness. Speed density is a lot easier to tune that MAF.

LTR's are junk after 5k.. If I did it again i'd have used a LT1 setup, or a center throttlebody type MPFI setup.

-- Joe

 

LTRs aren't an aftermarket FI setup.. HSR, mini-ram, pro-ram, super ram, ramjet, ramport FI or Holley EFI are. it's the basic design of plenum and runners that is **** poor for breathing. Although the Pro-ram has monster runners on it and a very good for 6000 rpm. But that's about a dollar per RPM for that unit lol!

 

No, "LTRs" meaning long tube runners. Stock TPI setup.. Even aftermarket larger tubes, ported plenum, bigger throttle body won't rev that high.. I had to add a blower to get that to happen.

What I meant was, if I were to do my intake again (which I may) i'd use a lt1 type setup (like miniram), or get edelbrocks victor jr efi setup.

Holley's mpfi setups are nice too, but I have no use for the electronics..

-- Joe

 

Personally, I like the fuel injection "look". The 3RDGen, TO ME, is when GM finally started to come into the current age of performance/styling - At least for me - Having been born in the early 80's.

To put a carb on a newer thirdgen or one that didn't come with one is just sick.

Yes, if tuning is your thing, a carb may be the way to go.

However, if looks and a reliability/driveability are more important to you, fuel injection may be a better way (when done right of course).

When/if I ever get another 3RDGen, it'll be TPI or if found w/o an engine, it'll have an LT1. Most people around here have the same mentality of most with regards to the 3RDGen F-bodies - RED NECK CARS. I plan on changing that mentality someday with a fuel injected IROC-Z.

 

the only people who think IROCs are ******* cars are the envious little import turds who will never have a fast car no matter how much money they spend on it. And they think ALL american cars are ******* cars. and just FYI, most hoosiers have the fastest cars, so automotively speaking, I wouldn't want to race their car, especially when they are sayin they'll only bring it off the trailer for a grand.

 

I would say TPI but my only reasion is that i think it looks amazing i want one so bad just because the why it look lol.

 

i like carbs i love the way the engine sounds when the four barrels open up you just don't get the same roar (that i have heard) with fuel inj i am a hillbilly BTW
Why is everyone so ****ing sensitive?????????????????????

 

Watch this video and tell me what it has in it,
http://www.transamws6.com/video/ZepherWS6.mpg

 

i tried but my connection speed must be 2 slow or my system is not set up right

 

A big cam, and non-functioning backup lights??

-- Joe

 

look guys i am trying to check the link but all it says that the page cannot be displayed WTF!!!!!!!! i tried that detect network settings and it the S.O.S

 

It works for me.
Right click and Save As.

 

hey guys



I have been around carbed and TPI cars. both work well when in good tune. the tpi setup is a one time tune thing and forget it. until something goes bad (ie Sensor). and work reliable. Tell me how often you guys have to retune that carb?

If a carb flaots your boat and will make you happy then go for it. to each is his own.

hey guys lets not condemn anyone for what they like to run whether it's a carb or tpi

IMO: i think the best way to go is use a TBI setup. to me my lo3 intake and TB will flow as much air as a tpi with out all the stuff in the way. the problem with the TBI motors is the heads suck.

but you could get a 4 barrel TBI unit from holley and moddify the ECM and cut the injector constant in half and with some minor tuning be right there if not surpass a TPI in top-end performance.

 

i think the T/A from the sound of it cold. idle is lopping vs to after it warmed up was some what smooth. i think it might be Injected.


but i might be wrong

 

Stuff in the way? Last time I measured the two bores in a TBI body they were MUCH smaller than the two bores of a TPI throttle body (48MM each stock). I think your crazy..

The problem with TBI is the throttle body, overhead mounted injectors, ecm, harness, intake, and then the heads.

A 730 setup with a center mounted throttle body and multiport injectors would be ideal.

-- Joe

 

Yep, that's my 2.8 liter V6 FI motor.

 

it is going to take 30 minutes to download that file and i am not that patient besides what i like is not up for debate i'll agree that fuel injection is reliable but so is carburation i would rather have fuel injection in a truck so it doesnt stall out on inclines/declines what it all boils down to is what you prefer

 

i don't have any data to prove that the TBI /intake unit will outflow the TPI upper and lower. but i think with the TBI mods for the money it could be made a better flowing unit vs with the long chocked runners.