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

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Old Oct 3, 2005 | 09:02 AM
  #1  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
Finally

I have loved American cars since my dad bought his 1997 Camaro SS. When I turned 16 i was confronted with a Green 1995 Camry LE in my driveway. No complaint but I was suprised my dad didn't by me at least something with an American nametag..

But after 6 months of driving he sold the Camry and bought me a jewel. My grandpa's friend was selling her 1992 Camaro RS 25th Anniversary edition 305 TBI V8; 50,000 miles. She gave us a price of $4000. Wow.. it looked amazing! I never thought much of Third Generation Camaros since most of them on the road are close to being totaled lol. She just got it repainted and she always kept a visor and a towel in the car. Looks brand new

I'm just asking if I should get a tune up first even thought it has low milage..

Also what are some good rims for the White Camaro?

Thanks, Mitch
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Old Oct 3, 2005 | 12:06 PM
  #2  
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
The stock rims look absolutely awesome fully polished .. or with a tad of satin black mixed with the polished surface

Tuneup wouldn't cost much... why not *shrugs*
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Old Oct 3, 2005 | 12:40 PM
  #3  
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From: Decatur, AL
Car: '88 Camaro RS,
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: Stock
I personally would change all the filters and do a good tune-up. Change the oil and drive. That way you can get on schedule, because as of now you aren't sure the last time any of that was done.

As for the rims...that is all personal taste. There is a thread on here somewhere where everybody has posted there rims. Search and you should be able to find it.
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Old Oct 4, 2005 | 08:14 PM
  #4  
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
*Delete

Last edited by M1tch; Oct 5, 2005 at 08:26 AM.
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Old Oct 4, 2005 | 09:27 PM
  #5  
Benm109's Avatar
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From: Greenville, SC
Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
The 2 best things are probably full exhaust and an open element air cleaner. Full exhaust includes everything, headers, y-pipe, high-flow cat or test pipe, and a 3" cat-back exhaust system. That will seriously wake the car up. After that, remove the factory air cleaner assembly and put an open element air cleaner on. Of course, you could also fab up your own kind of cold air intake. There have been a ton of posts in the past of custom intake set-ups that people have put on their TBI motors, it just depends on what you want.

After that, I would suggest putting some subframe connectors (SFCs) on the car. 3rd gens are known for flexing and being a little on the weak side, and SFCs help eliminate that. It will make the car feel so much tighter, and can sometimes get rid of random squeeks and groans in the car when going over speed bumps, railroad tracks, etc. SFCs are either bolt-in or weld-in, and either way get them welded. Either bolt in the SFCs and then take them to a shop to be welded or just take the weld-in SFCs to a shop and have them welded up.

I guess that's 3, but oh well.
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Old Oct 5, 2005 | 07:45 AM
  #6  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
would exhaust/ headers give me 20 hp?

Last edited by M1tch; Oct 5, 2005 at 08:25 AM.
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Old Oct 5, 2005 | 08:02 AM
  #7  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
What are some links to websites that have the right intake for me to buy?

My current list for parts im going to get are:

Hooker Headers and Exhaust
Timing the car to around 2-4*
K&N Air filter (or at the strip ill just take the damn filter off lol)
______

I have been thoroughly reading these helpful threads but i don't understand the basic things i need to know lol..

My goal is just just have at least 230 hp..

what steps should i take?

I know i need a new fuel pump.

Thanks alot guys

Last edited by M1tch; Oct 5, 2005 at 08:20 AM.
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Old Oct 5, 2005 | 02:37 PM
  #8  
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From: Ohio, near columbus
Car: 89 iroc-z
Engine: 305tpi
Transmission: wc-t5
Axle/Gears: 10 bolt 3.08 posi (4 now)
exhaust and new air cleaner i doubt will get you to your goal of 230hp but, i'm no expert. As for the timing you may be quite surprised when you check it. Mine was running 700-800 rpm idle in park and 600 in driver with 12* timing and idled and ran as smooth as butter.

Me being the *genius* that i am changed it back to factory specs and could have been passed by geo metros until i changed it back (now it's at 10*) (notice the sarcasm). So if i were you i'd make sure it's not way off ,and check for throttle response (it had none at 0* now it's pretty snappy) Mostly what i'm saying is if it's running fine leave it alone........
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Old Oct 5, 2005 | 04:24 PM
  #9  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
i know the above wont give 230 hp but my goal is 2 have 230 hp in the future... I'd like to stay away from doing internal stuff because i don't know how much i like the engine
(and im new 2 engines)..

If an expert could do a list for me 2 get 230hp i'd be appriciated.
Thanks.
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Old Oct 6, 2005 | 12:34 AM
  #10  
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
From what I understand you can go do it to .. a certain degree ... you would need chip work ... I don't know how far you can go without chip tuning .... 230 without chip tuning uhmmm nope .. doubt it
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Old Oct 6, 2005 | 07:53 AM
  #11  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
whats the best internal things to upgrade?

My dad has a 1997 Camaro SS
I could steal his LT1 cam .

So whats the best way to go for internal parts besides a new cam? What parts will give me the most bang for the buck?
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Old Oct 10, 2005 | 01:39 PM
  #12  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
Whats the best way 2 race the 700R4? Shifting from 1-2-D?

Or just keep it in D?

Or race in overdrive?
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Old Oct 10, 2005 | 02:28 PM
  #13  
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
I'm sure different people will have different opinion regarding internal engine parts. It depends on amount of money you want to change.

I know my list to do in the future (and this is not a short term goal but slowly slowly) is:

Another block to work on
Lighter connecting rods, maybe 6.0
Hyperetic (sp??) pistons (no need for forged unless you go turbo, serious blower, nitrous or 14:1 compression)

You can try longer stroke crank *shrugs*

For me.. I'm going to aim to lighten the internal parts as much as I can ... now problem could very well be.. that I may end up with a rotating assembly spinning a bit too easy.. but oh well... I want to avoid getting a new torque converter *lol*


700 tranny ... waiting for replies regarding that one .. I know though that one can't rev 1st gear very far at all... from reading it here as to why.. and from personal experience.. lol.. did it o nthe street and well.. bit disapointing
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Old Oct 10, 2005 | 02:35 PM
  #14  
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From: Ohio, near columbus
Car: 89 iroc-z
Engine: 305tpi
Transmission: wc-t5
Axle/Gears: 10 bolt 3.08 posi (4 now)
well you could probably get around 200hp with the addition of an aftermarket cold air intake setup (or open element) and full free flowing exhaust (long tube headers, hi flo cat (or none) hi flo muffler and nice mandrel bent tubing.

This may be not entirely correct but, i'm hoping to see 200hp after a tbi rebuild with mild porting and mild porting to the stock manifold and the addition of roller rockers and possibly headers(already have a 3 in catback and a open element).

ps. most peopel will agree with me here, if you want the best sotp feel then swap them rear gears out for some 3.43s or 3.73s and put a posi unit in there while your at it.

(this would be my first mod if it weren't for the fact that the intake manifold and valve covers have to come off anyways).
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Old Oct 10, 2005 | 09:19 PM
  #15  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
how much hp do 305's tbi have to the wheels?

Also, will headers/exhaust/3.73 gears get me in the 15.3's?
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Old Oct 10, 2005 | 10:19 PM
  #16  
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Car: 1998 Volvo S70
Engine: B5254S Engine
Transmission: Automatic
Axle/Gears: It's a volvo?
TBIs have about 170hp at the wheels with nice 255lbs of ft torque to go with that.

I have about 175hp, with 263ft. lbs of torque at the wheels....


Dont get discouraged by the low hp, they are good strong engines with massive amounts of potential...I'll be installing an open element this next week which will hopefully push me to around 185hp
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Old Oct 10, 2005 | 10:26 PM
  #17  
vorgath's Avatar
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Yup

176 hp ... but the 255 torque means I can get anywhere I need to go FASTER driving LEGALLY on the streets .. since by the time the other cars reach 35 .. I'm at 40 .. and passing before the light turns red again
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Old Oct 11, 2005 | 08:33 AM
  #18  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
Do you think my RS could beat a 98 v6 Camaro?
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Old Oct 11, 2005 | 11:31 AM
  #19  
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it could... they make about the same, i got beat by a lot of 4thgens before i got my 350cid. to get 230hp out of an LO3 (305TBI) you will need full exhaust (headers all the way back to the tailpipes) a decent cam (LT1's are popular) and if you want, you can find some 081 cast TPI heads, unmodified they are better than your stock ones, but if you port your stock ones, they can be substantially better. you will most definately need a tune though. Every new part you add (except maybe a muffler or an air filter) could cause you to need a new tune... TBI gets pretty picky.. Good Luck and happy modding
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Old Oct 11, 2005 | 05:34 PM
  #20  
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Car: 1998 Volvo S70
Engine: B5254S Engine
Transmission: Automatic
Axle/Gears: It's a volvo?
Originally posted by M1tch
Do you think my RS could beat a 98 v6 Camaro?
a 95 V6 camaro tried to race me, and I beat that thing so badly its not even funny...I would atleas thought it wouldve kept up with me seeing as how it was a 5 spd and had nearly the same horsies....but I must've gotten ahead of that thing by 100ft....so I cant imagine the 98 V6s being any better but they do have slightly better V6 engines....
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Old Oct 11, 2005 | 08:23 PM
  #21  
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Those V6's come with more horsepower yes .. but... the combination V8 with accelerating torque before the horsepower numbers take over.. makes a difference

oh well plus... the weight have something to it too .. being the 3rd Gen is slightly lighter

My buddy flew away from me.. driving his V6 Camaro.. hmmm '99 or 2000 .. something like that .... but... that was before I knew anything what so ever about shifting by pressing and depressing the accelerator pedal ...

also I didn't know he was going to speed up .. lmao
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Old Oct 11, 2005 | 08:35 PM
  #22  
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Car: 1998 Volvo S70
Engine: B5254S Engine
Transmission: Automatic
Axle/Gears: It's a volvo?
yeah on these cars you really have to work on your take offs. When I first got it I was like, getting blown by almost everyone....and I was thinking "this car sucks" but then I finally learned the car's true hidden power, and its in the lower MPH, and lower RPM area....if I take off from 35 mph, I chirp the tires and I am outta there....whenever some guy follows me too closely (tailgate) I purposely slow down to likw 25-35mph and that is what I like to call..."Point of No Return Zone" just to make the guy behind me feel like an ***, I gas my car down and I am gone....


Its fun, but yeah you should be able to take on a V6 camaro, I mean I have been able to keep up with Porche Boxters before (not that thats saying much, Boxters are the only Porches I dont like) Powerwise though, the stock V6 camaros may have more hp, but you have about 60 more ft lbs of torque at the wheels then they do....plus 3rd gen cars only weigh about 3100lbs, the 4th gen cars weigh like 3500lbs....
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Old Oct 11, 2005 | 10:45 PM
  #23  
M1tch's Avatar
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Posts: 535
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
96+ come stock with 200hp. 95-93 come with 180 i believe.

Those v6 camaros are sooo slow on take off. my friend has a 98' Camaro and I would take off in my 1995 125hp CAMRY and i would be 20-30 feet ahead of him when i hit 40. Then when his car would shift into second along with mine.. i'd get blazed.

I noticed my 92' 305 tbi is fast as **** on takeoff. Some might not agree so but it pushes me to the seat. But when is shifts into second around 40.. the rpms are too low and its slower. But once it hits 60 it speeds up again..

Thats why i need the 3.73 gear ratio.

Correct?
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Old Oct 11, 2005 | 10:51 PM
  #24  
M1tch's Avatar
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
Originally posted by 91ChevyRS
yeah on these cars you really have to work on your take offs. When I first got it I was like, getting blown by almost everyone....and I was thinking "this car sucks" but then I finally learned the car's true hidden power, and its in the lower MPH, and lower RPM area....if I take off from 35 mph, I chirp the tires and I am outta there....whenever some guy follows me too closely (tailgate) I purposely slow down to likw 25-35mph and that is what I like to call..."Point of No Return Zone" just to make the guy behind me feel like an ***, I gas my car down and I am gone....


Its fun, but yeah you should be able to take on a V6 camaro, I mean I have been able to keep up with Porche Boxters before (not that thats saying much, Boxters are the only Porches I dont like) Powerwise though, the stock V6 camaros may have more hp, but you have about 60 more ft lbs of torque at the wheels then they do....plus 3rd gen cars only weigh about 3100lbs, the 4th gen cars weigh like 3500lbs....
What mods do you have? Boxters are almost as fast as 1997-2002 SS Camaros.
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Old Oct 12, 2005 | 08:01 AM
  #25  
91ChevyRS's Avatar
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Car: 1998 Volvo S70
Engine: B5254S Engine
Transmission: Automatic
Axle/Gears: It's a volvo?
Originally posted by M1tch
What mods do you have? Boxters are almost as fast as 1997-2002 SS Camaros.
Boxsters as fast as SS? Absolutely not, an SS would crush a Boxter on any given day, Boxters are by far the slowest Porches, it couldve been the base model Boxter I took on. But by no means are they fast. They are fast cars in general, but seriously, they are a waste of money.
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Old Oct 12, 2005 | 08:08 AM
  #26  
M1tch's Avatar
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Joined: Oct 2005
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From: Cincinnati, Ohio
Car: 1989 Iroc Z
Engine: 496 BBC
Transmission: th400
Axle/Gears: 4.11
yes the SS would win definately.. The Boxter's have two models.. one has 240 hp and the other 280. But lets get back on topic. F*** porsches.
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