slower after header install

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May 6, 2008 | 02:08 AM

99mTealB4C

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slower after header install

i just installed a set of pacesetter race lt's no (egr) and a ory and it seems that my car is slower then what it was earlier in the day. what could be the problem. I got no check engine lights but havent really had the chance to drive it much the car is basicly stock except the lt's, ory, slp catback, slp lid and f.r.a.m. What could be wrong low end seems to be lacking most please help.

May 6, 2008 | 02:11 AM

orangeapeel

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From: Justin, TX

You are gonna have more top end. That is where your power went.

May 6, 2008 | 02:12 AM

droptopT/A

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From: longbeach CA

maybe u need a tune

May 6, 2008 | 02:14 AM

99mTealB4C

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so is it normal to lose low end and just gain top end? just seems way slower to me but way louder.

May 6, 2008 | 02:15 AM

GT Griller

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From: Hereford,Lubbock

its prolly the noise too.....more nose but not really moving.

May 6, 2008 | 04:32 AM

DVS99TRANS

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From: E City,NC & Newark,DE

When I put mine on the 99, my air/fuel went to a dangerous 16:1. I found out later that when I bought the car it had a handheld tune put in it, along with a ported MAF threw the car for a loop. Be careful and get the car tuned, you won't see the optimal power out off the headers until you get a tune. Not saying your running that lean, but just giving ya a scenario.

May 6, 2008 | 09:17 AM

rsodeputy61

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From: Mississippi

get a tune, mine did the exact same thing early on when i did the header install. i used wait4me...very pleased.

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May 6, 2008 | 09:27 AM

Scoggin Dickey

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From: Lubbock, TX

Quote:

Originally Posted by 99mTealB4C

so is it normal to lose low end and just gain top end? just seems way slower to me but way louder.

Yes, it is normal. You lost some low end torque so it feels slower, but you should make more top end HP. A tune will gain you a little more of both.

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May 6, 2008 | 09:28 AM

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COD02SS

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From: Chandler, Az

I thought LS1's ran extremely RICH after a LT install?

May 6, 2008 | 10:54 AM

#11

miamifan3413

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From: LaGrange, KY

Quote:

Originally Posted by COD02SS

I thought LS1's ran extremely RICH after a LT install?

Most do.....then some run lean. Just depends on the engine i guess. My ride runs fine without a tune so far. Waiting to get my cam installed before i get a tune.

May 6, 2008 | 11:05 AM

#12

CAMAROZ28SS

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From: SOUTH FLORIDA

Quote:

Originally Posted by miamifan3413

Most do.....then some run lean. Just depends on the engine i guess. My ride runs fine without a tune so far. Waiting to get my cam installed before i get a tune.

mine ran fine after my header install too. i got it tuned about a week later and defanatly feel a difference

May 6, 2008 | 11:08 AM

#13

miamifan3413

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From: LaGrange, KY

Like orangeapeel said, power went up in the power band some. Your midrange and topend will be stronger. Lowend might feel slower but your probably making the same power as before.