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Dec 2, 2001 | 08:45 AM

Doski

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Joined: Nov 2001

Posts: 42

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From: Malmö, SWEDEN

bolt on

Hi!What will 1-5/8 headers, 3"catback, tb52mm give in hp +shiftkitt
What will the 1/4 be?

Current mods chip + k&n airfilter+muffler
Thanks!

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5,7l GTA -90

Dec 2, 2001 | 10:10 AM

GMTech

Supreme Member

Joined: Jul 1999

Posts: 2,767

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From: Vereinigten Staaten

Car: Take

Engine: Your

Transmission: Pick

Do you have any idea what you are running now? My guess, and its probably a very poor one at that would be low 14's

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If you live in Southeastern US, check us out!
South East Thirdgen

1987 Trans Am 305
14.88 @ 92.81

Dec 2, 2001 | 02:28 PM

Reno

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Joined: Apr 2001

Posts: 244

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From: Palatine, IL

Your gas mileage will drop, but 1-3/4 will be much better for power on your 350. I assume the rest of your car is bone stock? the 52mm TB may be a bit much for now. Spend the money on a dremel and bits and get a little port crazy.

If you're motor is in perfect shape otherwise (full tuneup, no leaks, running nice and clean) I'd say high 13's *MIGHT* be possible. Don't quote me though. Definately low 14's. That's a MAP motor, right?

-Reno

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"We are the middle children of history. Our Great War is a spiritual war, our Great Depression is our lives" - T.D.

Dec 2, 2001 | 03:59 PM

SMURFN' Z28

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From: Lakewood, CO

Car: 1994 Jeep Wrangler

yeh... a 52mm would a total waste on money, get a dremel and do some porting, get an air foil, and an AFPR

yo RENO still go to ISU?

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Bone stock blue TPI 85' Z28 42k original miles.

My Ride ---> https://www.thirdgen.org/rides/index...ew&rideid=8141
*previous car: lightly moded 89' Formula 350

Dec 2, 2001 | 05:33 PM

JuGrNuT350

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Joined: Nov 2001

Posts: 142

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From: Humble, Tx. USA!!!

What to you think I'd run

90 Reg. Cab short bed Sierra w/350

TPI w/ some port work
Aluminum L98 Vette heads
Mild Cam(Crane Hdr. roller .452/.465 214/220)
1.5 alu. rockers
700R4 w/ shift kit
3.73 rear end
headers & flowmaster exhaust

-Timbo-

Dec 2, 2001 | 05:53 PM

GMTech

Supreme Member

Joined: Jul 1999

Posts: 2,767

Likes: 2

From: Vereinigten Staaten

Car: Take

Engine: Your

Transmission: Pick

We could play guessing games all day long, but you'll never be sure till you run it. Making guess like this are very subjective, especially when your trying to evaluate given mods. I could say mid 14's and somebody else might say mid 13's, thats alot of leeway.

If I had to guess, I'd say 13.9

------------------
If you live in Southeastern US, check us out!
South East Thirdgen

1987 Trans Am 305
14.88 @ 92.81

Dec 2, 2001 | 09:43 PM

JuGrNuT350

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Joined: Nov 2001

Posts: 142

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From: Humble, Tx. USA!!!

Yea he's totally right because there are so many variables...Its so hard to get the perfect run.... Like right now its colder but if you run in the summer you'll be slower, hook everything....

-Timbo-