ported head????
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Joined: 01-05-06
Posts: 10,877
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From: East Brunswick, NJ
Originally Posted by CobaltCoupeCrazy
I've read that anytime you replace the camshaft with aftermarket cams you need to replace the stock springs. With increased lift, you don't want to risk binding or breaking a spring.
Today in the GM Sport Compact Performance Build Book on page 69, I read "Use of mechanical lash adjusters is recommended when using camshafts with more lift than production. Clearance of .005"----.007" is recommended between the roller and the cam."
The GM performance Parts camshafts are also mentioned and also that they require the use of new springs to avoid coil bind. They recommend Bates springs.
Today in the GM Sport Compact Performance Build Book on page 69, I read "Use of mechanical lash adjusters is recommended when using camshafts with more lift than production. Clearance of .005"----.007" is recommended between the roller and the cam."
The GM performance Parts camshafts are also mentioned and also that they require the use of new springs to avoid coil bind. They recommend Bates springs.
I've had my stage 1s since mid 2004 and have been fine since. I put the new head on last year.
Senior Member
Joined: 03-02-06
Posts: 620
Likes: 0
From: Fleetwood, PA
Originally Posted by NJHK
I doubt you'll read 200 crank HP with cams and exhaust work.
In my opinion, 2 1/2" exhaust is too big for the 2.2L
In my opinion, 2 1/2" exhaust is too big for the 2.2L
If I get the stage 1 cams should I get colder plugs.
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Joined: 03-07-06
Posts: 593
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From: Vancouver, Canada
Originally Posted by BlackLS
So what else would I have to do to reach 200 hp. I forgot to mention that I was thinking of trying to get JET to make me a custom computer chip.
If I get the stage 1 cams should I get colder plugs.
If I get the stage 1 cams should I get colder plugs.
Senior Member
Joined: 01-05-06
Posts: 10,877
Likes: 2
From: East Brunswick, NJ
Originally Posted by BlackLS
So what else would I have to do to reach 200 hp. I forgot to mention that I was thinking of trying to get JET to make me a custom computer chip.
If I get the stage 1 cams should I get colder plugs.
If I get the stage 1 cams should I get colder plugs.
As far as the "custom chip", you can't chip our OBDII computers...it's worthless. The chips you do see are resistors that just make you run richer.
I'm old school
Joined: 02-16-05
Posts: 6,905
Likes: 3
From: Nashville
The replacement of valve springs is done to handle 2 things specifically; Bind as a result of higher lift, and float as a resulte of higher RPM. Spring replacement can be done without head removal. You should replace them if you plan to rev much higher then the stock limit RPM or if you are going with a high lift cam. I can not recommend Bates as I used them first, and one of their springs broke, destroying my engine. I am now using Ferrea.
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