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Old 07-23-2015   #11
We Gone
 
Join Date: Apr 2004
Location: ATL. GA.
Posts: 2,170
Default Re: Exhaust removal questions (worth saving?)

Russ, if you don't mind what kind of #s did you get stock? If I remember when I did mine Stock it did 324rwhp.
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1990 Steel Blue/Black #2355
1990 Red/Red #1473
1991 Quasar /Black #118 Sold
1991 Turquoise/Black #766 Parted Out
1993 Yellow/White #179 Sold
1990 Black/Gray #1361 Headers/4:10s Sold
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Old 07-23-2015   #12
RussMcB
 
Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
Default Re: Exhaust removal questions (worth saving?)

Around 296-299 RWHP (five runs, two different dynos).

I have Marc's chip, wired open secondaries, new coils & injectors, (everything else stock, 67,000 miles). I went to the dyno to get pre-header baseline numbers. I was expecting something closer to 330 or so.

Yesterday I sent my chip to Marc for recalibration (more fuel for the headers). We'll go back to the dyno after that and hopefully I'll be around 345-350. If not then we've ruled out the clogged exhaust as my main issue and I'll need to look at other possible causes.

At first I was disappointed with the low numbers (and that's why I went to another dyno a week later, for confirmation). Then I realized there is a bigger jump to be gained, so it should feel pretty great after fixes and current underway upgrades.
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Old 07-23-2015   #13
Z51JEFF
 
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Join Date: Dec 2007
Location: Fremont,Ca
Posts: 3,080
Default Re: Exhaust removal questions (worth saving?)

If you decide to junk the exhaust I'd be interested in one of the mufflers,well actually just the exhaust tips.
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Old 07-23-2015   #14
RussMcB
 
Join Date: Jan 2015
Location: Marietta, GA USA
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Default Re: Exhaust removal questions (worth saving?)

Quote:
Originally Posted by Z51JEFF View Post
If you decide to junk the exhaust I'd be interested in one of the mufflers,well actually just the exhaust tips.
OK. Send me a PM with your email address and I'll send pictures.
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Old 07-23-2015   #15
We Gone
 
Join Date: Apr 2004
Location: ATL. GA.
Posts: 2,170
Default Re: Exhaust removal questions (worth saving?)

That's not bad numbers Russ, After I did Marc's chip and just cat-back flowmasters I did 339rwhp-346tq... the next step was to the 510 package. I ended at around 490 at the FW but I still run cats and duel mass FW.
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1990 Steel Blue/Black #2355
1990 Red/Red #1473
1991 Quasar /Black #118 Sold
1991 Turquoise/Black #766 Parted Out
1993 Yellow/White #179 Sold
1990 Black/Gray #1361 Headers/4:10s Sold
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Old 07-23-2015   #16
RussMcB
 
Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
Default Re: Exhaust removal questions (worth saving?)

Quote:
Originally Posted by We Gone View Post
That's not bad numbers Russ, After I did Marc's chip and just cat-back flowmasters I did 339rwhp-346tq... the next step was to the 510 package. I ended at around 490 at the FW but I still run cats and duel mass FW.
Which numbers are you saying aren't that bad? I think 296-299 is noticeably down on power. But if your talking about my expected number (~330), then I agree. I'll be happy with that.

I know this is wishful thinking, but I REALLY hope I'm satisfied/content with the car after headers. There's no doubt the 510 package is fantastic, but that would mean my cheap "$10K Corvette" investment (the initial price I paid for the car) would grow to $25-30K. I doubt I could hide that expense from my wife. She's already commenting on my checking account balance's rapid decline.

Therefore, please don't ever give me a ride in your car. :-)
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