Should I switch to S3's?

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Oct 8, 2010 | 03:57 PM

#16

Svendiesel

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From: Teh internets.

Im pretty happy with the S2's. Pretty sure I saw 39psi somewhere in the early/mid 4000rpm range, I just feel like the extra top end the S3's would give over the S2's would be very worth it especially on the 2.4.

Oct 8, 2010 | 09:54 PM

#17

lillev23

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From: Georgia

Quote:

Originally Posted by Fathouse

FP5rs are bigger than the s3 cams I belive. I run those in my setup now, nasty they are!

Fathouse

How do they compare to the BF272?

Oct 8, 2010 | 10:01 PM

#18

EvoVIII :D

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From: Florida

Like stated before, there is nothing better than calling Greg at gsc because he could help you the best since im sure he knows his cams and waht applications to use them with. I think the s2's would be perfect though for most anything.

Oct 9, 2010 | 02:02 AM

#19

adam_79_2005

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From: SoCal

Quote:

Originally Posted by Svendiesel

This isnt so much a "help convince me" thread moreso than it is, technically, is it doable type question? I have S2's right now, its a BR long rod 2.4 (10:1 cr) with an FP Black and a BR stage 3 head. I want to do the S3's because theyll help the motor breathe a little better especially up top.4 and I feel like theyll push me an additional 25-40whp past where I am now. My biggest concern is piston to valve clearance.

Anyone have any input?

this is a great thread, my mechanic convinced me that my new build would allow me to go much more agressively with my cams, i had kelford 272 but because of the new build my power output would allow for gsc power s3 cams

Oct 9, 2010 | 09:23 AM

#20

Svendiesel

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From: Teh internets.

If I got S3's and the valve did contact the piston while checking for clearance, what exactly needs to be done to make it so that everything will work properly?

Oct 9, 2010 | 02:02 PM

#21

FathouseFab

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From: Indy

If it hits your gonna need alot of work. Rule of thumb is 60 thou on the intake side and 80+ on the exhaust. I have seen intake valves setup at 40 thou slightly kiss the piston.

Check it in a full range of motion, I start 20 deg btdc and go to 20 deg atdc.

Fathouse