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

some advice for my 305 TBi....

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Old Sep 25, 2011 | 02:43 PM
  #1  
1Broke_camaro's Avatar
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
some advice for my 305 TBi....

ok so i tried a searched for it all, i really suck at using the search feature lol, so i was wondering if people could help me out a little bit.... ive got a stock 305 (for now) im not looking to pull the motor again and rebuild it, or slap some massive AFR heads on or anything. i have the smog pump removed, A/C delete, edlebrock shortys. thats really all i have, i was wondering if anyone had advice for some bolt ons i could do.....

can i throw in new/bigger injectors with an adjustable fuel regulator? and brand suggestions?

anybody try the TB spacers i know their only a couple bucks for them would they be worth it?

i plan on doing a MSD setup mainly, for if i plan to bumping up to a 350 carb or TBi setup i can still use the setup.

what else can i do just to get a little more power???

i know shes just a wittle 305 and i cant expect 500hp after some small stuff. but wondering what little things \/ $100 i can do to make some noticable difference..... anything?
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Old Sep 25, 2011 | 02:44 PM
  #2  
1Broke_camaro's Avatar
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
Re: some advice for my 305 TBi....

BTW this 305 isnt staying in long.... shell be out within the next couple years and will be replaced with a 383 LT1 either solid roller or a small turbo so just something to give my car that looks pretty nice a motor to give it some power and respectfulness in the playing scene
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Old Sep 25, 2011 | 03:41 PM
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From: Katy TEXAS (West Houston)
Car: 1992 Camaro RS
Engine: 5.0 TBI L03 V8
Transmission: Rebuilt 700R4 W/ Corvette shift kit
Axle/Gears: 2:73 open
Re: some advice for my 305 TBi....

Here are some public posts (you’ll have to cut through the opinionated and engine swap crap), but there is some good stuff in here. #1 rule, don’t get anything you can’t swap over to a 350 or 383 or sell later on. #2, Go cheap on the 305. Don’t put a $50 dollar saddle on a $20 horse is the common saying.

https://www.thirdgen.org/forums/tbi/626560-evaluate-305-tbi-build.html

https://www.thirdgen.org/forums/tbi/622480-just-want-200hp.html

https://www.thirdgen.org/forums/power-adder/622784-looking-get-high-power.html

And a TGO Official post. Ultimate TBI parts one and two, plus how to make a dual snorkel air cleaner.

https://www.thirdgen.org/ultimatetbi

https://www.thirdgen.org/ultimatetbi2

https://www.thirdgen.org/dualsnorkel


And these are my suggestions:
  1. Open Air Element (Cleaner) or duel snorkel air cleaner
  2. New headers back exhaust system
  3. TBI Chip
  4. 180* Thermostat swap
  5. Nitto NT555 tires or similar tire
  6. Edelbrock performer rpm intake manifold
  7. 3.42 10 bolt Rear End
  8. Corvette Shift Kit (if you have an auto)
  9. Ultimate TBI mods
  10. Wider Aftermarket Rims
And if you want to go big:
1. Heads
2. Camshaft

Hope this helps!
-SKELITOR
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Old Sep 25, 2011 | 04:24 PM
  #4  
1Broke_camaro's Avatar
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
Re: some advice for my 305 TBi....

thanks for the links..... its already chipped, sorry i forgot to put that, i threw in a hypertech YEARS ago lol

whats wrong with shortys? mind you i think i have like 4 inch of ground clearance so i dont wanna run a 800 dollar set of headers along the ground lol


how would tires and rims affect how fast it is? or powerful? i know itll help with cornering.... not throwing your ideas out at all, im just used to playing with LT/LS cars and their pretty easy.
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Old Sep 25, 2011 | 05:18 PM
  #5  
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Re: some advice for my 305 TBi....

well I dont neccesarily agree with everything skelitor said. but wider rims allow you to run wider tires which help for traction. so therefore if you were racing at a 1/4 mile and you hooked up you'd have consistent and faster elapsed times.

I wouldnt put a penny into the car performance wise, id only spend on stuff to keep it running. and save every other dollar to get me to my 383 LT1 swap or whatever swap you have planned. that is the smart way to do it. instead of spending a bunch of money on parts your not going to use later, and not going to be able to get 1/2 of your money back on.
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Old Sep 25, 2011 | 05:27 PM
  #6  
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: some advice for my 305 TBi....

I would not replace ingition parts if they are working.

Only effective bolt ons (without modifying the engine, fueling and tuning) are, full exhaust, better aircleaner and 1.6 rockers.

Loks like you have most of them covered.

Last edited by thomas1976; Sep 25, 2011 at 05:35 PM.
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Old Sep 25, 2011 | 06:23 PM
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
Re: some advice for my 305 TBi....

the LT1 setup is not an issues its already planned being in the military i can really rely on how much im making each month and the way its setup withing the next 2 years i should easily have a 400-450 crank hp motor not really hard a bump in displacement some heads and intake and i can run a LT4 hotcam and easily make those numbers should hopefully see mid 300 at the wheels. right now im not really worried about 1/4 times this car will never see the track for the simple fact its embarassing lol. cant expect much from a 305....


but im just looking for right now power. maybe 200 max if i could ever get so lucky in this old boat anchor lol. but thanks guys ill post up some pics a little later on of what im working with
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Old Sep 25, 2011 | 10:37 PM
  #8  
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From: Pennsylvania
Car: '91 Camaro RS
Engine: Carb'd 383
Transmission: Built T5
Axle/Gears: 3.73 Posi
Re: some advice for my 305 TBi....

Any kind of air intake setup will definitely help, I went with an open element but some people prefer and cold air intake but it will help A LOT, and depending on your exhaust size, a nice cat back system with 2.5 inch pipes would help, as would 3.23 rear end gears, and you could try an injector spacer and a throttle body spacer, not sure if they work but why not try it? And I don't think bigger injectors will do anything more than waste more gas, your injectors should be enough for a 305 already, but definitely give it a good tune-up too, and I think you'll be very happy with a new intake and exhaust, it really gave my car a little bit more kick
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Old Sep 25, 2011 | 11:44 PM
  #9  
Ron U.S.M.C.'s Avatar
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From: Northern, CA
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: some advice for my 305 TBi....

Probably more than you want to spend at the moment but should definitely be on your list. I went with a 3.42 gear ratio. with a Eaton Posi. and it made a "huge" difference over the 2.73 open rear.

Last edited by Ron U.S.M.C.; Sep 25, 2011 at 11:55 PM.
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Old Sep 26, 2011 | 09:02 AM
  #10  
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
Re: some advice for my 305 TBi....

ooo the rear is covered shes getting a S60 with 3.73s but thats in the future, i dont wanna spend any money on the rear till she breaks, and the trans isnt getting touched till i do the swap.

but i will for sure try a open element, i just havent wanted to spend the money lol, and a tune up im about to get a MSD from my old man he had from a different build, so i just need to get everything else. plugs wires cap rotor and all. and i think ill try the TB spacer, and i read the injector spacer thing but didnt understand it. does anyone have pics that have done it?
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Old Sep 26, 2011 | 12:08 PM
  #11  
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From: Katy TEXAS (West Houston)
Car: 1992 Camaro RS
Engine: 5.0 TBI L03 V8
Transmission: Rebuilt 700R4 W/ Corvette shift kit
Axle/Gears: 2:73 open
Re: some advice for my 305 TBi....

If money is a problem go with 2460 hooker headers (Those are the cheap one's). They are only about 165.00 at Summit racing. You'll notice a significant difference with some new headers and the rest of the exhaust. Ad an open air cleaner or cold air intake cause the L03 is crippled at higher rpms due to the fact that it can't get air in (thats where the new air cleaner set up comes in) and then can't get it out (Thats where the exhaust comes in). If you already have a Hypertech chip (I do) then your already closer to your goal. That, the air cleaner set up, new exhaust, and a new intake an the ultamate tbi mods should put you close to 200hp (Crank).
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Old Sep 26, 2011 | 12:20 PM
  #12  
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: some advice for my 305 TBi....

Dont spend a dime on the TBI unless it's exhaust that you can use later.

You can dump a ton of money into it and still never quite crack 200 rwhp. Just put a nice 3 inch catback on it and enjoy the v8 sound til you get some ***** under the hood. Start working on suspension stuff. Put some good Koni's or KYB shocks/struts on it, get some lowering springs, and start replacing bushings and sway bars. That will make the car MUCH more fun to drive. But if you just want a straight line car at the end of the day, even an investment in suspension parts can be wasted. The corner carving parts are not always the same as the drag racing parts.

Last edited by InfernalVortex; Sep 26, 2011 at 12:24 PM.
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Old Sep 26, 2011 | 12:42 PM
  #13  
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
Re: some advice for my 305 TBi....

thanks for all the advice guys. and im running a set of shorty headers right now. when i get a little better off ill grab some long tubes, but suspension im halfway done on lol, LCA, reloc brackets, 4th gen sway bars front and back, all new bushings all around minus the a-arms, waiting to find a good deal on koni shocks. and waiting on my adj panhard bar to show up. the front im not messing with cause when i do the LT1 swap im getting a tubular K-member with the goodies so no sense in my eyes to spend money on stock replacements when im switching everything. lol and the lowering thing.... yea ive already chopped my stock springs a little and the ride is the exact same so ill leave those.


but i think im set with throwing a nice exhaust on it, grab a K&N open element with the open lid, TB Spacer, and a 160 or 180 stat. my fans are running on a hard switch so they turn on when i tell them to. thanks for the advice guys. ill post pics up, i just got my intake bolted on today so im stoked. time to go buy some parts and get the rest of it together...
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Old Sep 26, 2011 | 01:50 PM
  #14  
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From: Katy TEXAS (West Houston)
Car: 1992 Camaro RS
Engine: 5.0 TBI L03 V8
Transmission: Rebuilt 700R4 W/ Corvette shift kit
Axle/Gears: 2:73 open
Re: some advice for my 305 TBi....

Sweet. Better go with the 180 stat with the Hypertech chip. Ask undercover if you want the details. I got the chip and the advice from him.
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Old Sep 26, 2011 | 03:14 PM
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Re: some advice for my 305 TBi....

I went with 180 on my car correct it worked best for me
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Old Sep 26, 2011 | 06:51 PM
  #16  
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Car: 1988 camaro "SS"/ 1991 305/T5
Engine: 383 LT1 in progress/LT1TBI 355 soon
Transmission: Probuilt 700R4 3600 stall/ T5
Axle/Gears: Moser axles, 3.42 Eaton Posi
Re: some advice for my 305 TBi....

I've said it once and I'll say it again. read the sig, go to my cardomain and read grasshopper.....nuff said lol
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Old Sep 27, 2011 | 12:36 AM
  #17  
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Re: some advice for my 305 TBi....

I just think its useless if your really going to swap in a lt1 or whatever you can not spend money on the 305 and get to your goal faster of switching out to the other engine.
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Old Sep 27, 2011 | 03:18 PM
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From: Katy TEXAS (West Houston)
Car: 1992 Camaro RS
Engine: 5.0 TBI L03 V8
Transmission: Rebuilt 700R4 W/ Corvette shift kit
Axle/Gears: 2:73 open
Re: some advice for my 305 TBi....

I think me and 1broke have the same plan. Get the 305 to where it's not embaresing, drive it around for a few years, save up some $$$, and then swap it out for a 383 stoker.
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Old Sep 27, 2011 | 04:26 PM
  #19  
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From: Cape May, NJ/North East, MD
Car: 1992 Chevy Camaro
Engine: 350 TBi in the working
Transmission: 700R4 :(
Re: some advice for my 305 TBi....

Originally Posted by SKELITOR117
I think me and 1broke have the same plan. Get the 305 to where it's not embaresing, drive it around for a few years, save up some $$$, and then swap it out for a 383 stoker.


VERY MUCH SO!!! lol i got wooped by a stock GTi with a kid who didnt know how to drive.... doesnt help my trans was slipping and when from 2nd to O/D lmfao but yea i just wanna get a little more ooomph into her. thats all. ive ran mid 10s with my 383 on the bottle so i know i wont feel the same power or speed but its still nice to roll from a light and light up the *** end whenever i want
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