How much lift is too much?

Outlaw97GT

Member

Sep 10, 2005

234

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16

Redneckville, Tx

Aug 13, 2006

#1

• Aug 13, 2006

• #1

Im looking at some cams for my 97 GT.
Does anybody know the max lift you can go with stock NPI heads?

Im debating between the comp 268H or the crower stage II.
Comp 268H
In. 230, ex. 236
lift .500/.500

Crower 62811-2 Stage 2
in. 220, ex. 224
lift .532/.532

Crower 62812-2 S/C Stage 2 ( but looks like a good n/a cam also)
in. 230, ex. 230
lift .532/.532

I know the comp-cams lift will work in a NPI, but how about the .532 lift on the Crower cams?
I know alot of people run the stock PI cams with no problems.
PI cams
in. 200, ex. 209
lift .504/.531

Second question is how much power should I expect with comp or crower cams?

BTW I am planning on a s/c down the road, leaning more towards a roots.

Thanks....:SNSign:

 

T

TGJ

New Member

Mar 30, 2005

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Aug 14, 2006

#2

• Aug 14, 2006

• #2

Crower 62812-2 S/C Stage 2

Click to expand...

Would be the best cam of the ones you mentioned.

.545 is the max lift on a NPI head with Crower Offset Retainers.

 

Outlaw97GT

Member

Sep 10, 2005

234

0

16

Redneckville, Tx

Aug 14, 2006

#3

• Aug 14, 2006

• #3

Would I need the offset retainers for .532 lift?

 

T

TGJ

New Member

Mar 30, 2005

1,049

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Aug 14, 2006

#4

• Aug 14, 2006

• #4

Outlaw97GT said:

Would I need the offset retainers for .532 lift?

Click to expand...

You don't need the offset retainers for those.

 

fastangboi

My first set of nuts vibrated themselves off.

Jul 26, 2006

274

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0

Slowville

Aug 14, 2006

#5

• Aug 14, 2006

• #5

wonder what the limit is on a PI is. i wanted to run 234/238 w/ .550/.550. its a Crane Cams CCA-102600

 

0

01Steeda

New Member

May 29, 2005

732

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Baton Rouge, LA

Aug 14, 2006

#6

• Aug 14, 2006

• #6

I am running 550 lift cams.

 

Outlaw97GT

Member

Sep 10, 2005

234

0

16

Redneckville, Tx

Aug 15, 2006

#7

• Aug 15, 2006

• #7

TGJ said:

You don't need the offset retainers for those.

Click to expand...

Thanks....

 

fastangboi

My first set of nuts vibrated themselves off.

Jul 26, 2006

274

0

0

Slowville

Aug 15, 2006

#8

• Aug 15, 2006

• #8

01Steeda said:

I am running 550 lift cams.

Click to expand...

you need to run better springs, right? what other prep is needed on a 550 lift??

 

T

TGJ

New Member

Mar 30, 2005

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Aug 15, 2006

#9

• Aug 15, 2006

• #9

On a PI head, the only thing I would recommend is upgraded springs to run .550 lift cams.