cam specs question

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Aug 11, 2010 | 03:18 PM

racerwannabe

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From: boiling springs sc

St. Jude Donor '06

cam specs question

i want to run a comp thumper cam in my 2001 corvette...auto matic...will the stock heads work or will I have piston to valve clearance problems from my other wise stock motor???

Johnny

Aug 11, 2010 | 04:31 PM

Bluefire

Le Mans Master

Joined: May 2006

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From: Hillsboro OR

I am running stock 243 heads. My cam is 224/230 .585/.595 113. with no p/v clearance issues. My understanding is (real motor guys correct me if I am wrong

), any lift < .600 will not encounter p/v issues.

Hope that helps.

Aug 11, 2010 | 06:32 PM

vettenuts

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From: At the beach in little Rhody

Total lift is not really relevant. What determines PTV is the duration and ramp rate. If the OP wants more responses, he should really post the cam specifications.

Aug 12, 2010 | 09:10 AM

dankhts

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Joined: Jun 2004

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From: Stoney Creek Ontario

Quote:

Originally Posted by vettenuts

Total lift is not really relevant. What determines PTV is the duration and ramp rate. If the OP wants more responses, he should really post the cam specifications.

duration and ramp rate count! especially if the heads have been milled!

Aug 12, 2010 | 02:23 PM

racerwannabe

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From: boiling springs sc

St. Jude Donor '06

Quote:

Originally Posted by dankhts

duration and ramp rate count! especially if the heads have been milled!

VALVE ADJUSTMENT HYD HYD
GROSS VALVE LIFT: .554 .537
DURATION AT
.006 TAPPET LIFT 275 295
VALVE TIMING OPEN CLOSE
AT .006 INT 33 62
EXH 77 38

THESE SPECS ARE FOR CAM INSTALLED
@ 103.0 INT C/L
INT EXH

DUR @.050: 219 233
LOBE LIFT: .3260 .3160
LOBE SEPARATION: 109.0
now ....will it fit without cutting the pistons???

Aug 12, 2010 | 03:48 PM

AU N EGL

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From: Raleigh / Rolesville NC

Looks like a

219/233 554/537 109

Aug 12, 2010 | 03:52 PM

racerwannabe

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From: boiling springs sc

St. Jude Donor '06

Quote:

Originally Posted by AU N EGL

Looks like a

219/233 554/537 109

do you think i can use it??

Aug 12, 2010 | 04:23 PM

0331MARINE

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Joined: Oct 2007

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From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga

I'm running a 237/242 .609 112LSA on stock 241 heads with no problems.

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Aug 12, 2010 | 04:47 PM

AU N EGL

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From: Raleigh / Rolesville NC

Quote:

Originally Posted by racerwannabe

do you think i can use it??

no problems

Aug 12, 2010 | 06:17 PM

#10

cptinjak

Burning Brakes

Joined: Jan 2008

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From: Grand Rapids MI

Quote:

Originally Posted by racerwannabe

do you think i can use it??

Stock heads? definitely

Stock springs? ehhh...

Aug 12, 2010 | 06:32 PM

#11

AU N EGL

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From: Raleigh / Rolesville NC

I also would not use stock springs

Aug 12, 2010 | 08:34 PM

#12

vettenuts

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From: At the beach in little Rhody

Should clear but I would still measure for two reasons. You will know how much clearance you have and if you ever decide to do something else (for example mill heads) you won't be guessing later.

Aug 13, 2010 | 10:48 AM

#13

racerwannabe

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From: boiling springs sc

St. Jude Donor '06

Quote:

Originally Posted by vettenuts

Should clear but I would still measure for two reasons. You will know how much clearance you have and if you ever decide to do something else (for example mill heads) you won't be guessing later.

will do..and will get the kit..springs retainers rockers etc..
thanks guys!!
Johnny

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