TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Got The Chevelle Running good with TBI!!!!

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Old Jun 29, 2001 | 08:39 PM
  #1  
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From: Ocean Springs MS USA
Got The Chevelle Running good with TBI!!!!

I got my return line run, and took it out and it pulled hard to 3K rpm, so I guessed FP. I pulled off the pod and turned it all the way up, and now hehehehe Big Grin on the face. I ran the Gtec on it, and am turning mid 14's consistantly. Remember, I am running a stock TB. Headers, ported heads, GM alum Intake, 4 speed and 3.73's. I wonder whats the next thing I should do?
Oh and I think I remember a 91bird305? or someone that was wanting to race my TBI Chevelle? Bring it on buddie.

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jun 29, 2001 | 08:45 PM
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sweeeet. what engine?
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Old Jun 29, 2001 | 09:11 PM
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From: Tomball, TX
Car: 89 TTA
Engine: Turbo 3.8
Transmission: 200R4
Sounds very nice. Is this a 327? 350? 396?
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Old Jun 29, 2001 | 09:19 PM
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From: Ocean Springs MS USA
350 69 Chevelle. You guys want pics?

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jun 29, 2001 | 09:25 PM
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From: Ocean Springs MS USA
http://www.tupics.com/members/Cmartz/Chevelle1.jpg
http://www.tupics.com/members/Cmartz/Chevelle2.jpg
http://www.tupics.com/members/Cmartz/harness1.jpg

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jun 30, 2001 | 02:10 AM
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From: Round Rock, Texas, U.S.A.
What a pretty chevelle
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Old Jun 30, 2001 | 04:10 AM
  #7  
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sweet. just put some 18s on that baby . That's one of my favorte years. I like the '65,'67,'69, and '70. My dad had a red '64 ragtop but it was gone when I was like 8. I like the other years better though.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz
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Old Jun 30, 2001 | 02:53 PM
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Sweet man, u now have a chevelle 350 that only runs a 14.5 with 3:73's and will still get dusted by any stock 4thgen Z28. Good job on the swap. Don't get ****y with me. And I never said I wanted to race you, just said to keep that american muscle carbed...but like I said, its your car. Do what u want. Guess u accomplished what u wanted to. Mid 14's from a 350 chevelle.
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Old Jun 30, 2001 | 05:07 PM
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From: Ga
Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
Nice car. I've always liked that color on those cars. Glad to see someone using TBI in an older application and don't be bothered by any negative bull**** coming out of some peoples mouths. It's your car and you have every right to be proud of what you've done with it! You can mod that combo for more performance just like any other. Got to agree about the wheel's. It would look killer with some bigger meats on there but I could say that about my car also with 16's on it.
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Old Jun 30, 2001 | 05:23 PM
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Don't blame me, he called me out. I don't even come here anymore, friend told me about this post. And I am saying the same thing u are. Its his car, let him do u want he wants, but when he calls me out acting ****y with his incrediable 14.5 then of course I am gonna put him in his place. I would have said nothing if he would mind his own business and not talk sh*t.
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Old Jun 30, 2001 | 06:21 PM
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From: Round Rock, Texas, U.S.A.
Alright Bad bird, no use of fighting over the internet, its not going to get anyone anywhere except for a closed thread
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Old Jun 30, 2001 | 08:43 PM
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If you guys remeber, speed and performance was not the reason for the TBI upgrade, and I am not saying that my car is something fast. Haha a slow *** heavy car that will outrun your 17 sec car that is basically stock (TBI and Headers). But remember, TBI sucks right? TBI is not the culprit, but the motor that chevy decided to put it on. I garundamntee that a zz4 will have just as much HP with a TB of equal CFM then it will with a carb while getting better mileage\fuel response\reliability.
Boy! I aure am dissaponnted that my stock chevelle ONLY runs 14's!!

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jun 30, 2001 | 08:47 PM
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Oh and I am still calling you out with my "Incredable 14.5" LOL What?? are you going to beat me? hahah I doubt it. and BTW most stock 350 chevelles run about the same Qmile as your car. about a 16.9-17.5 and the stock 396 chevelles will turn low 15 high 14 sec times. I would say I am doing OK.

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jul 1, 2001 | 12:18 AM
  #14  
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From: Valley, AL
Good job on your swap. 14.50's for a car that weighs at least 3900# with you in it isn't bad at all. That same engine in a 400-500# lighter thirdgen gen would be knockin' on 13's. I think its pretty cool to see later model EFI systems retrofitted in muscle cars. Have you ever thought of a 5 speed on down the road?? You'd have respectable gas mileage and the car would be faster in the 1/4 and have a faster top speed, something to think about....

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82 Z28 383, Ported 215cc Dart Iron Eagle Heads 72 cc Comb. Chambers, Comp custom grind Hyd roller cam, Speed Pro .250" domes, Wheeler Motorsports 4340 I beam rods, Eagle 5140 steel crank, Weiand Team G intake, Holley 830 DP, hedman headers
Trans: Turbo 350 w/ 4000 stall -- Rearend 7.5 w/ Richmond 4.10's, Auburn Minispool
Best ET:11.63 @ 113.25, w/ a 7.39 1/8 @ 93.04, and a 1.626 60'


89 RS, L03 305, Hypertech Chip,cat delete, Dynomax exhaust,K&N open element Filter,160 stat, MSD coil --Trans:700R4 Corvette Servo -- Rearend: 7.5 GM 3.42 w/ posi-lock
New Best ET: 14.91 @92.9
Bassett Racing
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Old Jul 1, 2001 | 01:02 AM
  #15  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
A 5 speed won't last very long behind a heavy car with power. The 5 speed is only quicker if you aren't scared you'll brake the darn thing . Besides, 14.5 with a 4 is doing good. Is that an auto or a m-21? BTW, if you know of a place that sells m-22's or 21 closed ratio...PLEASE let me know. My friend is looking for a new trans and his car is sitting (suspension rebuild) for a few more weeks. We're looking for a new tranny.

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, Jon (350 TBI!)
91 Red My website
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Old Jul 1, 2001 | 03:35 AM
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From: Ocean Springs MS USA
It is a Manual. Muncie 4 speed. M-20 wide ratio. I use a GM stock 11 inch clutch disk. I would have to get a tremec 5 speed, or something of that sort, as the t-5's are not too stout and will not stand up to a 350 very well. I was also thinking t-56 out of a camaro, but those are hella dollars, alot of retrofit(whereas the muncie was a bolt in swap from auto. I would very much like to have the .5:1 OD ratio of the 6 speed, but It is not practical for my next upgrade. 427BB. The BB would bolt right in my car with my muncie and have no problems. The t-56 will psyically bolt to a BB, or a SB for that matter, but special clutchs and pressureplates and flywheels are needed, and even though a t-56 is strong as hell, it is not as strong as my 4 speed.
If you are wanting to buy any Manual GM tranny, I have a source. I am pretty sure that the M20 and 21 are both wide ratio, and the 22(rock crusher) is a close ratio. Those are all really RPO codes for the car, and correspond to the tranny. like a M-32 I think is a TH350 automatic.
I powershift my car through the gears at least 4 times a day, and more if necessary, and there has been no negative affect. I am definantly not afraid of breaking it. LOL.
Shoot me an email if you want some muncie sources. A M-20 like mine will run you about 750 bucks shipped. You will want to use a competition plus shifter if you want to reatin stock console. Lemme know if you need anything elese. I will be more than happy to help.


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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jul 1, 2001 | 11:25 AM
  #17  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
It's actually for a 69. He's got a TH350 right now and doesn't like it. 3 speed auto is crap for a daily driver. I told him he should think about a built TH700r4 or a muncie. We saw a bunch of M-21's at Englishtown swap meet but they were selling for $600 in used condition. I was under the impression that the M-21 could be either closed or wide ratio and the 22 was the best of the best . Please e-mail me your source with a phone number and name.
Thanks

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, Jon (350 TBI!)
91 Red My website
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Old Jul 1, 2001 | 12:24 PM
  #18  
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Haha, calling me out. Thats funny. Here, let me drive all the way there to race you, even though I know I would lose. Yeah, I have a 305 TBI. Its not stock by any means. It doesn't run 17 seconds anymore, it runs 15.4 @93.6mph Your a full second ahead of me. But you have a modified 350 and I have a 305 with all stock internal parts still. And if speed and performance was not part of the upgrade then why are u telling us your new 1/4 mile time when you should be giving us your new mpg. And if you find a ZZ4 or whatever (don't know why u picked the ZZ4) that runs a better time then a ZZ4 with TBI on it with equal drivetrain mods than I will give you the benift of that comment. But I can guarentee you that you won't because TBI is not popular among the performance crowd so no one really wants it for an injection system. GMHP dynoed the engine with carb, if they would have thought they could have gotten more hp/tq with dynoing it with TBI I am sure they would of, but they didn't. When it comes down to it, carb is the best injection system for high hp/tq. If you don't beilve me, read the article in GM High Tech Performance magazine about injection systems. Driveablity and realiabilty it may not be. Read that article to see what I am talking about. It was very good.
And what time did your car run before anyways? I can't remember.
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Old Jul 1, 2001 | 02:10 PM
  #19  
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ya carbs rule. EFI sucks. I'd like to see an LS1 get 30MPG and 300RWHP stock with a carb.
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Old Jul 1, 2001 | 09:51 PM
  #20  
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Car ran a 17.5 when I bought it.
I have to agree that for High HP street applications, carb might be better. I will probbally end up using a carb on my BB upgrade until I can make a dual TBI reliable.

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jul 2, 2001 | 09:43 AM
  #21  
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Anyone making fun of you is just jealous of the car... Drive and enjoy!!!
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Old Jul 2, 2001 | 12:28 PM
  #22  
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
I love the simpsons. I'm not making fun of your car man, I don't even do that to Pablo. But just don't be calling out my name and crap on your threads again cause thats just being childish. I don't come here that much anymore so I don't know when and who talks sh*t anyways. Friend told me about this thread. Anyways, good luck with the car in the future and I have another question. What else did u do to that engine to get it to run a 14.5? What did the car run before the TBI was installed is what I am trying to find out.
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Old Jul 2, 2001 | 08:31 PM
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From: Ocean Springs MS USA
I bought the car with single exhuast, and manifolds. It had 2.56 gears, and a TH350.
First time to the track it ran high 16's. all that is aftermarket to the car as far as mods go is minor porting and smoothing on the 882 Heads that I did while I was bored one day. I am a firm beliver in keeping your car tip top shape, and I am not saying these things will help any car, but my suspension is tuned right, and I keep little things like wheel bearings and fan belts new and tight. Oh yeah my car has an electric fan.

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jul 2, 2001 | 09:34 PM
  #24  
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
So, your car went from High 16's to a 14.5 by adding TBI and porting of the heads? Knocking off 2.5 seconds, That doesn't sound right, even if it was any other injection system. Was your carb tuned right?

[This message has been edited by 91Bird305 (edited July 02, 2001).]
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Old Jul 2, 2001 | 10:29 PM
  #25  
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From: Ocean Springs MS USA
OK Let me simplify for you
#1 Gear swap from 2.56 to 3.73
#2 Headers and dual exhuast from Single exhuast
#3 TBI
#4 Electric Fan

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90
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Old Jul 3, 2001 | 05:06 PM
  #26  
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From: Conroe, TX
I think that most hot rodders don't feel like tuning the computer, so they don't want to run TBI. Here lately the popular swap is an LT1/LT4 or LS1. These are easy swaps, because they can use the computers from the donor cars. Right at 300 rwhp out of a motor swap with no mods. My truck is probably running just behind the TBI Chevelle. I have more mods, but more weight and wind drag. Top end is where my truck starts to mellow out. Off the line it will take off like a red raped ape. TBI has worked great for me. I wouldn't hesitate to put a nice 350 TBI in any car or truck.

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'87 Silverado
350 4 bolt main bore .040 over
TB Injected
Ported and Polished heads
Comp cams 268h cam and top end
Flowtech headers
3.73s on Detroit locker
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