scottyballs

iTrader: (3)

Im in the works on a custom grind cam... I want a good duration like the big cams but I dont want the spring wear that comes with it...

I was thinking somthing like 231/237 560/563 +4 on a 112 lsa whats the pros and cons of this cam with the low lift and high duration?

gollum

iTrader: (1)

Your idea will work good with stock heads and/or ported heads with good low/mid lift flow numbers.

scottyballs

iTrader: (3)

cool thanx... yeah Im running stock heads and if I do get heads its going to be the 5.3's...

I guess since Im going to run a small lift It would be better to go with a XE-R grind?

ArcticZ28

iTrader: (14)

Even with lower lift cams, the XE-R lobes' inherent increased ramp rates will put additional strain on valve springs. Just letting you know since you're picking based on spring life.

JZ'sTA

iTrader: (23)

The car will make less power. Idle will be worse. P to V clearence will be almost exactly the same so no benifit there.
I say just buy a better spring and get all the benifits you can get.
I used a MTI cam before that was a 232/236 575/578 I believe.
Car ran good, and I was happy. Switched to a 224/228 581/588 and made VERY similar power. Peak came earlier, idel was noticeably better, and the car acturally ran better times at the track. I am not saying your idea is a bad idea just not something I myself would choose to do.
Good luck with it.

scottyballs

iTrader: (3)

Yeah Ramp rates on the XE-R are very agresive... but I would like to make some decent power. Im sure it would be better then say a 590-600 lift would be on the springs... Im looking to get a good 20-30k miles on 918's Ill talk with the guys at comp and see what they think.. if the XE-R grind will be pushing it then Ill just step down to the normal grind