1/4 mile quick TBI
#1
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
1/4 mile quick TBI
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...
#2
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
Wow, I thought this thread would be a live wire....
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: 1/4 mile quick TBI
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...
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.
#4
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
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...
#5
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Car: 91Z28
Engine: 5.7 ls1
Transmission: 4l60e
Axle/Gears: 3.42
Re: 1/4 mile quick TBI
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.
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Re: 1/4 mile quick TBI
not many results! im also down to hear what mods people are doing
#7
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
I know there has to be a few quick TBI thirdgens out there, come on guys..Lets hear some bragging...
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#8
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Car: 1988,1989 camaro
Engine: sbc 350 TBI
Transmission: 5 speed, th350 w/shift kit
Axle/Gears: 3:27
Re: 1/4 mile quick TBI
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)
#10
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
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....
#11
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Car: 1989 Pontiac Firebird
Engine: 305 Tbi w/lt4 hot cam
Transmission: 700R4
Axle/Gears: torsen 3.42
Re: 1/4 mile quick TBI
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...
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#13
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
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...
AWESOME..Thanks for sharing...101 mph means you were making good power...Please tell more about the mods, and your car...Please....Tom
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Re: 1/4 mile quick TBI
Ugh I need more horsepower! Im going Nitrous, it's just tough cause it's my daily driver too.
#16
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
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...
#17
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Re: 1/4 mile quick TBI
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.
#18
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Car: 3rd gen!
Engine: SBC
Transmission: yes
Axle/Gears: yes
Re: 1/4 mile quick TBI
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.
#20
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Re: 1/4 mile quick TBI
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.
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Re: 1/4 mile quick 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
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Car: 1982 Z-28
Engine: 5.7L Crossfire
Transmission: TH-350
Axle/Gears: GM Posi, 3.73
Re: 1/4 mile quick TBI
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.
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1/4 mile quick TBI
Wow that is awesome...How do you like the vortec heads????? Did you have them on when you had the TBI on the car??????
#24
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Car: C1500
Engine: 350
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Axle/Gears: 2.73
Re: 1/4 mile quick TBI
What all was involved with the Van engine?
#25
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Re: 1/4 mile quick TBI
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.
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Re: 1/4 mile quick TBI
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.
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Car: 87 Z28
Engine: AFR 383
Transmission: 700R4
Axle/Gears: 4:11
Re: 1/4 mile quick TBI
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
#31
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Re: 1/4 mile quick TBI
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.
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Re: 1/4 mile quick TBI
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.
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Car: 1988 Firebird, 2000 GTP
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Re: 1/4 mile quick TBI
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.
#37
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Re: 1/4 mile quick TBI
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.
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Re: 1/4 mile quick TBI
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.
#43
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Car: 91 Camaro RS
Engine: 305 TBI (L03)
Transmission: T5
Axle/Gears: 3.73 Truetrac posi
Re: 1/4 mile quick 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.
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Re: 1/4 mile quick TBI
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.
#45
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Car: 1990 Firebird
Engine: 350 TBI
Transmission: T5
Axle/Gears: Auburn posi 3.73
Re: 1/4 mile quick TBI
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.
#46
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Car: 91 Camaro RS
Engine: 355 Vortec
Transmission: 700r4
Axle/Gears: 3.42
Re: 1/4 mile quick TBI
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.
#47
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Re: 1/4 mile quick TBI
Doesn't matter what yhou bolt on if its not tuned its gonna run worse than where it was or close.
#48
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Car: 1990 Firebird
Engine: 350 TBI
Transmission: T5
Axle/Gears: Auburn posi 3.73
Re: 1/4 mile quick TBI
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.
#49
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Re: 1/4 mile quick TBI
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
#50
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Car: 1988 Z28
Engine: 355 TBI
Transmission: T-5
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Re: 1/4 mile quick TBI
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 ?
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 ?