Cam Selection

B

Burn'nRubber

New Member

Feb 25, 2008

8

1

1

Mar 20, 2008

#1

• Mar 20, 2008

• #1

Today I took my gt40p's to a reputable machine shop to be checked, thermal cleaned, and a valve job. I plan on having these heads ported and polished, milled, springs, etc after I decide on a camshaft. The owner is supposed to call me in the next few days to discuss possible cam grinds, but I figured I would get your opinions as well . I am looking for close to 300whp(with the gt40ps, edelbrock performer intake, and the cam), but peak hp isnt as important to me as a nice torque curve as its mainly a street car. Id also like to have a nice lopey idle, without sacrificing driveability.

One of his machinists recommended a cam from comps xtreme energy line. I told him to write down the specs. Would this cam be a good choice for my combination?
*Duration @ .050 224/232
*Lift .555/.565


Thanks

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

9,516

6

99

Arkansas

Mar 20, 2008

#2

• Mar 20, 2008

• #2

That camshaft may be okay, if you have the valvetrain to support it.

Why guess?

Go with a custom camshaft.

I had good success with Ed at www.flowtechinduction.com

 

P

PJC Racing

New Member

Nov 21, 2007

199

0

0

Mar 20, 2008

#3

• Mar 20, 2008

• #3

Another good custom cam grinder would be www.camshaftinnovations.com

Getting a custom will get you closer to the 300hp you are looking for with those heads.

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

9,516

6

99

Arkansas

Mar 20, 2008

#4

• Mar 20, 2008

• #4

Yes, Jay Allen will set you up as well.

 

H

haoleboy72

Member

Dec 11, 2006

60

0

6

Hillsboro, OR

Mar 20, 2008

#5

• Mar 20, 2008

• #5

I use a comp cam XE270 and love it! pleny of power, totally streetable (use mine as a dd) and has a nice lope to it. Dont have any numbers yet, getting it dyno tuned next week. Shouldn't have a problem putting 300hp to the wheels

 

enyawix

Member

Dec 18, 2005

507

0

19

127.0.0.1

Mar 21, 2008

#6

• Mar 21, 2008

• #6

Will a Lift .555/.565 cam clear the pistons?

 

NKau

Founding Member

Dec 15, 2001

1,346

0

37

Jefferson, WI

Mar 21, 2008

#7

• Mar 21, 2008

• #7

enyawix said:

Will a Lift .555/.565 cam clear the pistons?

Click to expand...

My .544/.555 Comp XE-266 cam didn't really even bring the valves close to my stock pistons when we clayed one.

 

squeak93

15 Year Member

Jun 2, 2005

2,256

358

164

Joplin, Missouri

Mar 21, 2008

#8

• Mar 21, 2008

• #8

Your duration has more role in ptv than lift......

 

NKau

Founding Member

Dec 15, 2001

1,346

0

37

Jefferson, WI

Mar 21, 2008

#9

• Mar 21, 2008

• #9

squeak93 said:

Your duration has more role in ptv than lift......

Click to expand...

Yeah, I see that the XE-270 has an extra 8* duration on both sides. It seems to be a pretty popular cam among guys running a 302/306 though.

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

9,516

6

99

Arkansas

Mar 21, 2008

#10

• Mar 21, 2008

• #10

Peak lift has nothing to do with piston to valve clearance. It is the period of overlap, when the exhaust valve is closing and the intake valve is opening at the same time.

The Trickflow Stage 1 camshaft peak lift position occurs when the piston is 2.156" down the bore.

Do you guys have part numbers for those camshafts?

XE-266 and XE-270.

 

NKau

Founding Member

Dec 15, 2001

1,346

0

37

Jefferson, WI

Mar 22, 2008

#11

• Mar 22, 2008

• #11

5spd GT said:

Do you guys have part numbers for those camshafts?

XE-266 and XE-270.

Click to expand...

The XE-266 should be part # 35-514-B

 

white 89 GT

Member

Apr 3, 2003

281

0

17

Tacoma

Mar 22, 2008

#12

• Mar 22, 2008

• #12

Here is another custom cam grinder. http://www.camresearchcorp.com/
He does fords only.