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High 15's on 305 TBI

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Old Sep 21, 2005 | 06:49 AM
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
High 15's on 305 TBI

Ok, last night at Bristiol I ran a 16.5 several times. I am guessing that is about what I will run consistantly. Now, for the question. Could I, by only modifing the throttle body, using a spacer, K&N open element air filter (I have the functional SS Ram Air hood, so the air is cooler) headers and 3 or 3.5 inch exhaust, an a JET 1 chip, get into the 15's? I also plan to get a 3.23 posi and the LCA relocation brackets to improve speed off the line. I plan to do a head and cam swap as well, I just wanted to see if I could get into the 15's on stock insides. Thanks.
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Old Sep 21, 2005 | 07:07 AM
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From: Buckhannon, WV
Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
Remove the jet chip from your parts list and do the gears and posi first and you'll run 15's.
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Old Sep 21, 2005 | 10:05 AM
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From: Tempe, Arizona
Car: 96 Silverado/99 Suburban
Engine: 700 cubic inches of 'Muican Awesome
Transmission: 4L80/4L60
Axle/Gears: Chunky/Clunky
15's are possible without really any modifications, just good tuning. Get all those things running right that you mentioned and you'll for sure get there
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Old Sep 21, 2005 | 10:09 AM
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From: Albany, NY Area
Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
Sounds about right. My best time was a 16.46@82.45 last Sunday. A posi rear with say 3.73s, full exhaust, and a good tune could definately get you there. good luck!
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Old Sep 21, 2005 | 02:23 PM
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
So, the chip isn't recommended? I don't think I want to go 3.73. I drvie it 40 miles round trip to school five days a week, so.... Gas. 3.23 would be better for my needs. 90305RS, is yours tuned, or is that just the difference in the transmissions? What would be the best thing other than the gears to get me closer? Thanks.
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Old Sep 21, 2005 | 02:40 PM
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
It is very easy. Its all in the tune, ditch the Jet chip, and learn it yourself.

I ran 15.1 @ 86mph with bad 2.2 60's, with an open element, headers, catback, and 3.42 posi.

Its all in optomizing the computer.
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Old Sep 21, 2005 | 02:49 PM
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
I was proud of my 2.2 60's. Lol, never ran it before. I plan to run a full 3 or inch exhaust behind the headers. It has no cats now, so I don't think I will buy any. No emission laws here. I am putting on the open element this or next week and going to get the 3.23 posi this weekend. My hood sux alot of cool air, so I should be good in that department. Gonna do headers/exhaust after subframe connectors, though. I need to get the burning hardware for the computer and start making my own chips. I have an laptop that would do nicely for at the track burning. Planning on getting a TB with the ultimate mods soon, too. That should help.
Oil change, full synthetic, this week. Needs it. (I about to go over 3k. Only done that once.) That should help it wind smoother.
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Old Sep 21, 2005 | 06:15 PM
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From: Kingsport Tenn
Car: 1992 camaro
Engine: LT1
Transmission: 4L60E
Axle/Gears: 3:73
Hey 91_5.7_Tpi I know this is the wrong form to post this on.(tryed on region board) I would be willing to split you on the tunning tools if you think we could put our heads together and figure this stuff out I'm trying to do it myself let me know thanks
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Old Sep 21, 2005 | 08:45 PM
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From: Tempe, Arizona
Car: 96 Silverado/99 Suburban
Engine: 700 cubic inches of 'Muican Awesome
Transmission: 4L80/4L60
Axle/Gears: Chunky/Clunky
Originally posted by 91_5.7_TPI
90305RS, is yours tuned, or is that just the difference in the transmissions? What would be the best thing other than the gears to get me closer? Thanks.
When I say "tuned" I mean it's been well maintained and everything is running perfectly. When I first got my car (I ran my 15.3 3-1/2 months after I bought it) she was running perfectly. As far as my transmission goes, yeah it may have made a little difference, seeing as how the T-5 also got a 3.08 pegleg rear, but I KNOW there are people running the stock 700R4/2.73 combo on here that have hit 15's...
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Old Sep 21, 2005 | 09:29 PM
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From: Albany, NY Area
Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
as far as i know, your best bet for the exhaust is to get SLP headers and y-pipe. It's the only set that includes a 3" Y... all the others have 2.5".
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Old Sep 21, 2005 | 10:15 PM
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From: Chouteau, OK
Car: Bitchin' 92 RS
Engine: 350 TPI
Transmission: 700R4
the best way to go with headers is to get any set you perfer, then take it to a good exhaust shop and they will make you a 3" Y for under 75 dollars in most cases. thats what i did
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Old Sep 22, 2005 | 11:02 AM
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Hooker makes the HOK-2460HKR @ Summit Racing. They are 150 bucks. They should be pretty good. Or are the SLPs are better? They used to have the complete kit for like 400. It was headers and 3 inch y-pipe.
What should I do to get the engine running better. I think I may need a new distributer and have a set of Boush plugs and wires. Oil change planned this weekend.

Any way to run 3 inch collectors on the headers and 3.5 y's and exhaust pipe?
Sorry, I ment 3.5.

Last edited by 91_5.7_TPI; Sep 23, 2005 at 06:54 AM.
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Old Sep 25, 2005 | 09:02 AM
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
PM sent, Chevyowner02. I'll resend if you didn't recieve it.
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Old Sep 25, 2005 | 11:24 AM
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
Originally posted by jimp2001
as far as i know, your best bet for the exhaust is to get SLP headers and y-pipe. It's the only set that includes a 3" Y... all the others have 2.5".
Hooker has a 3" Y pipe.

Have you ever compared the two brands side by side? even the 1 3/4" version, come into VERY small collector, I think we measure it, and it was only a 2.25" or 2.5" collector. IMHO the hookers are a better set of headers than the SLPs.
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Old Sep 25, 2005 | 12:07 PM
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From: Albany, NY Area
Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
what model hookers include the 3" Y-Pipe? I'm looking for headers without AIR, and I dont want to weld up the holes in a new pair of headers
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Old Sep 25, 2005 | 12:22 PM
  #16  
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Cap

Can't ya just cap the holes ?

OK maybe it's just me thinking that way since I live in CA and that's what I'll have to do when I may get headers some .. uhmm some... day..
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Old Sep 25, 2005 | 12:34 PM
  #17  
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
I can't find the Hooker headers/y-pipe on Summit anymore. I used to have it bookmarked, but I had to reformat my computer. If I find them, I will post it. I think that Hooker Super Competition are some of the best headers you can get.

I may have to have the y-pipe made anyway. I plan to get sub frame connectors first, and they may not fit with the header setup. Thinking about having them made as 3 input and 3.5 or 4 inch exit on the y-pipe and the rest of the way back to the muffler.

My buddy didn't cap his (manifolds, not headers), he just pinched 'em close with pliers, then smashed them flat with a hammer...
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Old Sep 25, 2005 | 03:34 PM
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From: Albany, NY Area
Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
I have my stock manifold plugged right now, but when I go to headers over the winter... I want it to look clean. Thats why I was leaning twords SLP 3005C, because of the ceramic coating, the lack of AIR tubes, and the 3" Y-Pipe
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Old Sep 25, 2005 | 05:20 PM
  #19  
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
The Hookers have no AIR tubes, and you used to be able to get the y-pipe with it. Personally, I don't like the ceramic coating. I have heard that it fades and doens't look as good with time. That, and it is much more expensive. I am not trying to argue, just saying why I like the Hookers. Wish I could find that Hooker header/y-pipe to show you.
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Old Sep 25, 2005 | 07:33 PM
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From: Kingsport Tenn
Car: 1992 camaro
Engine: LT1
Transmission: 4L60E
Axle/Gears: 3:73
Sent one back 91_5.7_TPI
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Old Sep 25, 2005 | 07:42 PM
  #21  
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
Contact JetHot coatings. The will should be willing to sell you hooker headers with their coating, and a coated Y pipe. Probably in the same price range as coated SLP, but you end up with a great coating.

BTW, what is wrong with cutting the air tubes off? you get the best headers for our car, just cut them off, weld it up, then have them coated after welding, you will never know they were modified.
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Old Sep 26, 2005 | 09:33 AM
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Originally posted by Dewey316
Hooker has a 3" Y pipe.

Have you ever compared the two brands side by side? even the 1 3/4" version, come into VERY small collector, I think we measure it, and it was only a 2.25" or 2.5" collector. IMHO the hookers are a better set of headers than the SLPs.
Luke warm reception for the hookers here. The pass. collector was practically designed not to line up. It just barely has enough contact to sort of seal. The y-pipe is also extremly thin. I didnt realize how thin until I drilled for an O2 bung. The drill bit caught and ripped the thing open like it was aluminum foil. Took an additional half hour of welding, bending, and hammering to get a round hole in place of the large gash. *** forbid I hit a speed bump with it.

Although given the ****-poor quality of alot of aftermarket parts Id still say these are ahead of the curve, especially given the reasonable price.
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Old Sep 26, 2005 | 11:38 AM
  #23  
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From: Albany, NY Area
Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
so thats the story here? it's with worth the extra money to have a higher quality setup like SLP?

I am keeping this car forever, so I want something that will last. I made the mistake of selling my last '89 and I'll never sell this one
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Old Oct 2, 2005 | 11:36 PM
  #24  
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From: Wisconsin
Car: 91 Camaro RS
Engine: 305 TBI (L03)
Transmission: T5
Axle/Gears: 3.73 Truetrac posi
My best track time with so far with 305 TBI is 15.56. This is with Hooker 2055 headers, Catco hi flow cat, Hooker Cat Back 3" exhaust, open element air cleaner, new plugs, wires, cap & rotor. Everything else is stock, including 3.08 open rear end. I have the rear end out now to install 3.73 gears. That along with several other mods should have me into the high 14's before the snow flies. Ported 081 heads LT1 cam (and good tune of course) will go in next spring. Goal is to be in the 13's without juice.

The Hooker 2055 headers come with AIR tubes. If believe if you buy them coated from ACS, they will install the O2 bung and remove and weld up the air tubes.
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Old Oct 3, 2005 | 02:43 AM
  #25  
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I have the Hooker Super Comp Headers (2055's). I bought them from ACS. I got them coated with a coated Y-pipe. And they have the air tubes.
Attached Thumbnails High 15's on 305 TBI-im000337.jpg  
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Old Oct 3, 2005 | 09:33 AM
  #26  
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From: Dixon, IL
Car: RS
Engine: 305
Transmission: 4L60
Axle/Gears: 3.42
hypercrap chip, edelbrock cat back, open element, car ran 15.8@86 2.73 open with crappy tires
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Old Oct 4, 2005 | 06:11 PM
  #27  
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
What is the ACS url? I'll look into those. I got my 3.23 posi with disks thiss weekend and plan to do the LCAs and relocation brakets.
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Old Oct 6, 2005 | 06:56 AM
  #28  
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From: East Tennesse
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
What is ACS? I've never heard of it. I'd like to get the 2055's for my car without the AIR tubes but with the O2 bung ready. Thanks.
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Old Oct 7, 2005 | 01:02 AM
  #29  
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ACS is American Coating Speciaties.

They used to be a board sponser. I don't know what happened to them.
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Old Oct 7, 2005 | 11:52 AM
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
Originally posted by azvolfan
I don't know what happened to them.
Their quality went to crap, they stopped returning customer calls/e-mails etc, and also ripped a few users off. So they are no longer a sponser.
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