What is differnet from my car to yours. Take a look at my website. where are you getting those mph's and e.t.'s from? I have the same stuff, but I'm 7 mph slower. please give me your opinion. Is it the hearders that I'm losing 3 mph with? I'd be happy w/ 107 and 13.1 N/A. check my link below. also, I think my tranny is slipping a lot between gears, maybe that is some of it. thanks -justin

------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!

[This message has been edited by Justin 87 GTA (edited February 14, 2001).]

 

First off i think that the 58TB is probably slowing your car down, actualy i would say its is for sure. My cam has 470/490 lift. I would change the cam and put LT headers and a custom y-pipe 2.5 to your 3 inch catback. If your going to supercharge might as well keep the 58TB. I ran 13.1@108 with my auto and stock converter and 2:73 rear gear and with the stock throttle body.I talked to you before. I could get you my specs on my cam for you. i do have a 3.5 mufflex exhaust but that would be one of the last things i would suggest changing just cause it costs alot of money and there are plenty of fast cars with 3 inch. Try putting Lt headers and 2.5 y-pipe use a flowmaster y-pipe from jegs like $38 to make your y-pipe, also change the cam and put the factory TB back on and run it it, should be alot faster. How much does your car weigh? If you have one of those 3900 pound cars that will slow you down.

 

I see you run full emisions, I have no egr or cats or smog pump. You can route the belt to eliminate the smog pump just need a different size belt. In PA You don't need a cat or anything for inspection but it is illegal to take the cat off. I know it dosn't make sense but ounce its off as long as they didn't see you do it, it will pass inspection anywhere in PA.

 

Emmissions, are strict here. I guess you're right about that stuff. I just switched over to serp, so I'll be running all accessories.
I don't need the cam specs, beacuse I'll be switching to a supercharger cam. I guess that w/ the charger the tb will be helpful moreso than hurtful. so I should see better gains. I was going to go w/ the slp 1 3/4" instead of long tube. what do u think? thanks
------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!

[This message has been edited by Justin 87 GTA (edited February 14, 2001).]

 

If you want to know what my exhaust looks like it is the same design as mufflex y-pipe except mine is 2.5 to 3.5. I think the factory routing around the oil pand is very restrictive. I have no ground clearence problems and i run lowered springs and 17s with kyb shocks.go to www.io.com/~/jme/z-28/slides/exhaust/3.html This is what mine looks like except this guy use the 4inck kit with 3inch y-pipe.

 

I would go with 1 3/4 super comp LT hookers. mufflex makes there y-pipe to bolt up to hooker super comps I believe $250 for y-pipe and $450 for either catback.

 

yeah, but they don't have A.I.R. tubes do they? thanks for the link I'll check it now. =justin
the link was bad, check it out
------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!

[This message has been edited by Justin 87 GTA (edited February 14, 2001).]

 

that's intersting that mufflex make the y-pipe that's good info. thanks

------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!

 

Thats right you running emisions. I would say the slp 1 3/4 are the best on the market besides the super comps. You could have a local shop weld the air stuff into the super comps should be prety easy. The link is correct but it won't work hmm.

 

I have air tubes on the TES. maybe they can fit them on the supercomps/good idea.
i'll check the link again
yeah still no good. how do they fit? any rubbbing?

------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!

[This message has been edited by Justin 87 GTA (edited February 14, 2001).]

 

try this www.io.com/~jme/z28/slides/exhaust/3.html

 

Wow! those look great. I think I want to try and go w/ them and have the tubes welded in. is there room for a cat after the y-pipe? if so, will it fi thte intermediate? that's 4" right? thanks

------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!

 

I don't know if ther is room for a 4 inch cat, but you could have two 3 inch high flow cats putin the y-pipe hmm that might be a little tricky, call mufflex and ask them if anyone makes a 4 inch cat that could be put just after the y-pipe. www.mufflex.com

 

very good, thanks for the great info!
so how do they fit?

------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!