Who out there has the quickest car with a stock, or semi stock GM TBI???? Post some times guys...Any 12 second cars running a basically stock TBI??? Porting, and modding are ok, but please no crazy aftermarket stuff.305's, or 350's..Hell even throw in some bigger motors..Thanks...

 

Wow, I thought this thread would be a live wire....

 

One of the fastest ones I know of was my 312 TBI build.

The 350 vortec single plane build in my 5,600 lbs G-Van running low low 14s @ 99 MPH in the 1/4 was probably the most powerful build I have done using it. Was making around 370 RWHP and ran out of engine.

 

Wow Fast, thats pretty damn good for the weight you are talking.....Thanks for your rpely, im just trying to get a feel for what the TBI's are capable of...

 

Im gonna subscribe to this since im also wanting a pretty fast tbi and this will give me some ideas i hope you dont mind.

 

not many results! im also down to hear what mods people are doing

 

I know there has to be a few quick TBI thirdgens out there, come on guys..Lets hear some bragging...

 

good idea for a post!...im sure theres some quick ones out there....would love to see some numbers....id like to do something with mine someday (stock 305TBI)

 

How fast is your car i see you have done quite a lot of mods into your car from your sig

 

First time out 15.03 @at 89..last time hi 14's.(Trans was flaring very bad on 2 to 3 shift).Have added stall, new tranny , subframe connectors, eddy intake bored TB, Umi control, and panhard bars,headers, real ram air and a glass harwood hood, so im hoping to drop a couple of tenths.....With a "real" motor it should be in the low 13's, or hi 12's without to much trouble..i have been working on the suspenstion mostly..still want to replace the torque arm with the one that bolts to the frame, and not th tranny...Hope to get to the track next week, or the one after....

 

my info is old im tuning the hot cam now lol.. but i had a 305 with world 305 heads, zz4 cam with 1.6 rockers, edelbrock headers, flowmaster cat back, 3.42 posi, stock bored out 2" intake with 2" tbi 350 injectors running a bit lean up top i ran 14 sec flat at 101mph 0-60 5.02 secs with a bad 60ft 2.20..that was with my gtech, not the best but consistent back to back..im positive it was good for high-mid13s at a track...

 

Oh if you do some major weight reduction u will be in the 13's easily

 

AWESOME..Thanks for sharing...101 mph means you were making good power...Please tell more about the mods, and your car...Please....Tom

 

I can't believe RobertFrank hasn't posted yet. He has a pretty quick TBI car.

 

Ugh I need more horsepower! Im going Nitrous, it's just tough cause it's my daily driver too.

 

Uh, I forgot to mention AFPR, and TPI pump......Mine to is a daily driver 6 days a week to work for years now...I want to get another car, so I can really go crazy on this one...

 

I have a holley 670 TBI with the built in AFPR in it. I'd just like to upgrade the heads because I think it will be overkill on my engine now.

 

I just replaced my TBI with a carb. With the 650 DP carb it ran a 13.9 @ 98. Mods are 310 cid, vortec 305 heads, stock LO3 cam, 1.6 RR's, shorty headers, cutout, stock stall, 3.23's and draglites. It's my full weight DD.

 

What did it run before the carb swap?

 

I never ran it with the TBI. It was running a little rough (stock chip) and I had the carb, HEI, and regulator from a previous build so I just did it. I'm sure it would have ran just as well with a smooth running TBI.

 

Gotcha. Im assuming you dont have smog. If I didnt have smog I would already have at least some vortec heads on there, I would probably carb it too

 

I haven't run at the track yet, but ran my 82 Crossfire on the dyno for the first time today. Made 240 RWHP and 270 ft-lbs. I am expecting one of the new Renegade crossfire intakes this winter and will run at the track next spring.

 

Wow that is awesome...How do you like the vortec heads????? Did you have them on when you had the TBI on the car??????

 

What all was involved with the Van engine?

 

Doesn't the stock TB support close to 280hp~. I would assume stock top can support a mid to low 13 second engine. I am pretty sure I would of knocked a high 13's if I would of kept my 305 and done some work on it.

 

any reason for keeping the stock L03 cam? That is a terrible cam for performance. I bet even a stock LT1 cam would have dropped 2 tenths on that car.

 

Yeah that's probably one of the worst cams ever put into a stock engine haha.

 

I made 300+ FWHP with the L03 cam and 1.6:1 rockers with 059 Vortec heads.

 

Lol, this is actually the first time I've seen this thread. I haven't run my car at the track yet but I should be in the mid to low 13 second range by now. The car feels FAR stronger than before but I'm still working out some tuning/valve train issues since the H/C/I swap. The damn EBL keeps trying to add more fuel than what I need. I want to get this little motor in the high 12's before my 383 LT1 gets swapped in. I fully believe once I get the 3200 stall in I should be there.

 

Quote:

my info is old im tuning the hot cam now lol.. but i had a 305 with world 305 heads, zz4 cam with 1.6 rockers, edelbrock headers, flowmaster cat back, 3.42 posi, stock bored out 2" intake with 2" tbi 350 injectors running a bit lean up top i ran 14 sec flat at 101mph 0-60 5.02 secs with a bad 60ft 2.20..that was with my gtech, not the best but consistent back to back..im positive it was good for high-mid13s at a track...

101mph should be good for 13.7's, My gxp weighed about what a 3rd gen does, i was running 13.7@102 stock. Thats about 240-250WHP, rated 303 to crank, 324tq.

Not too shaby with a 305

 

The PO had the 305 rebuilt and used the stock cam. I put the 059 heads on. I just didn't feel like buying a small roller cam because I am building a 355 so this setup will be scrapped soon. But 13's with an LO3 cam and 310 cid is pretty impressive I think.

 

deffinately impressive for sure. i need cylinder heads.

 

I need Heads, and a 3.42 gear.....

 

I dunno, I ran the same time with 3.08's...but the track was a little shorter then it was mismeasured. But yeah I ran a 14.64 with 3.08's and a sloppy transmission. 14.63 with 3.42's and a solid transmission.

 

TBI's are a pain to deal with and are slow. Go carburated

 

This thread makes me want to get mine to the track next year. Unfortunately it's only 1/8 mile that's close. I have some suspension issues to work out as well as top end tuning for fuel and spark first though. I'll bookmark and see who I have to keep up with.

 

Sorry I have to say it but SHUT THE F#@K UP NEWB!!!! You honestly don't know what the hell you're talking about. Trust me I know from experience that TBI cars can be made fast. So instead of spreading nonsense how about you say something useful.

 

As long as the TB is sufficiently large it will be adequate to feed engine the air and fuel it needs. I run a GM 7.4L TBI. My motor(350) spins to 5800 rpms. However in my logs I am still seeing a slight restriction(94 MAP WOT with 98 MAP @ key on). I believe the restriction is in fact my TB unit being too small. No fault of TBI just too small. My NOS kit fixed that.

 

Its not the TBI...Carbs are cool, but I am interested in playing with what is on the car right now....

 

Thats pretty amazing.....You had an L03 cam in a 350, or was this a 305???

 

Carb's are less fuel efficient. On my daily driver I get 24 mpg freeway, I will get more when I get into tuning. I'll stick with the TBI.

 

 

My best is a 14.02 Bottem end completely stock, mods in sig. Running T5 manual trans. Extensive tuning with EBL and wide band O2 to dial in WOT. My goal was to get into the high 13's with the 305, came up .03 sec short. I'm currently building a stout 383 over the winter that will go in next spring. Plan to keep it TBI for the time being, but I know I'll have my hands full getting it the air and fuel needed to reach its full potential.

 

Yeah the tuning is where you have me for sure, my heads have a slight port done by myself. and i dont have roller rockers. its good to know things that can put me into contention.

 

I took my junk to the track today. I am running AFR 180s and the LT4 hot cam. I had some trouble hooking up due to the stock rear. I might rebuild the rear with 3.73's and posi over the winter and see what that gets me.

 

Don't know what your complete setup looks like, but something seems a bit wrong here. With 180 AFRs and the LT4 hot cam you should be able to make somewhere near 375-400hp. I see the poor 60' time and that may account somewhat for the et, but if you were making hp like your potential you should be seeing 106-108 mph. Nice setup but I think you still have a few thing to work out. That thing should easily run low 13s.

 

Doesn't matter what yhou bolt on if its not tuned its gonna run worse than where it was or close.

 

Yea I did expect it to trap a little bit higher. I think the issue is some combination of my terrible shifting and the tune not being all the way there.

 

Well yeah you got 100 mph with a 14.4 you deffinately have more into her et wise. Probably more speed wise also. You'll get her eventually

 

I RAN 15.3 W/308 STANDARD REAREND....ONE WHEEL PEEL ! BROKE THE TRANNY MOUNT ON MY 2ND PASS... 355 LO5 BOTTOM END WITH LO3 TOP END,
DUDES I LOVE T.B.I. ! I GOT TWO LO5 TBI STOCK INTAKES 10166133, AND ONE LO3 STOCK INTAKE 14102182. DOES ANYONE KNOW THE DIFFERENCES / PROS N CONS ?