Hey, So i've been sitting on a cam for about a year now (FRI Patriot). Just never had the time to do it. In a couple weekends it's finally going in. I know guys are getting cams with 4* advance ground into it, but I'm wondering if installing it 4* advanced rather than straight-up would be alright. I'm getting it dyno tuned right after the cam goes in (should be no tuning issues either way). Just wondering if installing it 4* advanced is the same as having the cam ground with 4* into it. Any takers on this one? Thanks
Look at the specs of Patrick G's little boy cam and make comparrisons or Call FRI to make sure that is such a good idea on the Jeep since they have done a few or check with Stu at Intertia since he too has done a few cams for the Jeep and see what he suggests
Probably not. You'd be installing your cam 8 degrees advanced then. With the advance in the grind, you put the cam in straight up (dot to dot). If you want to advance it more, you should talk to the person you bought the cam from. The big issue with more advance is that you'll be decreasing your valve to piston clearance.
Sorry, think I explained that wrong. My cam has zero advance ground into it. Just wondering if installing it 4* is the same as having 4* ground into it. I dropped an email to the guys @ FRI last week, but i haven't heard back from them yet. Just thought I'd try my luck here. Thanks for the replies so far.:ilovesrtc:
Yes and no. By advancing the cam manually, you would be changing the centerline and the timing on the lift and duration as well. The cam will move all the lobes to open and close sooner in the cycle. Advancing the cam will increase low and mid range torque at the expense of some top end power.
hmmm...true, didn't think about that. Guess I'd better get with the FRI guys to find out if this is okay or not... Thanks,
Thanks, I kind of "read between the lines" on where you were going with that, but appreciate the follow up post. Once I talk with FRI I'll post back here with what they think.
If the cam is ground +4, then the blank is already advanced in the cutter...the same as moving a +0 ahead 4 degrees. Both ways the profile remains consisant. Why would this not be correct? If I install a +4 cam 4 retarded, guess what I have? A 0 degree cam.
I would suggest you contact Fri and ask them. Many things have been learned and changed over the past year. I can't think of anyone running that cam. Heck, you may want to consider going a different route to. Do you have the specs on that cam??.
Yes, but I've been told hal will accomodate up to 12 degrees advance/retard of striaght up. I just installed a Spartan cam. Straight up nailed a center line of 107 degrees and I retarded it to 112.
Yeah, but they don't do what I think you think they do. A cam position sensor "reads" the timing wheel on the front of the cam to determine when to fire spark. Its doesn't determine or read the advance or anything. Most the cam stuff being discussed here happens behind that timing wheel.
Man, I wish I could tell you, but I don't know yet. By the time I had it finished and washed last night, it was 11:00. And this morning I had nothing but traffic coming into the office. All I can say is that it idled right off the bat and everything is running very smooth. Of course this may not sound like all that much, but remember I'm running twin 65mm throttle bodies and a ton of other wierd one off shit. So running as smooth as it is-is a feat in it's self. :bigwink:
5 degrees is a lotta 'Tard. Why so much? Whats cranking compression with that install? Pix of the hot dual t-bod set up? Mmmm...dual t-bods....
Holy shit Cam. That's awesome! (I've never seen a pic with it cleaned up or all the parts actually on the motor instead of spread out on the work bench :grin
