so i was wondering how doable this custom grind would be as listed above, 216/228 .588 114/5/6....i was researching the "cheaTR" cam and thought it was a little much especially with requiring dual springs and retainers and seals etc. i was planning on accomidating this cam with some 918's and keep stock retainers. hardened rods of course but stock rod bolts too....i dont know where it would be best to shift at especially to try and keep the truck trapped before 3rd gear but know how maxxed out the truck manifold gets. i would eventually upgrade to the LS6 manifold and avoid some fab troubles but buying an LS1 water pump too, thankfully i have cable driven TB.
what would be some problems with this grind? i search the cheaTR and read about some idle issue with low vacuum?

thanks in advance for the help

 

What are your goals? Are you in a predicament to where you cant have anybody know there is a cam in it? If not, you need to stick to something smaller in duration and a way tighter lsa. And the higher LSA you go the less problem you have with lsa. I know the CheatR cam is on an extremely high lsa.

 

no i dont need to have anybody not know there is a cam in it. i dont mind lope at all but with the high exhaust durationa my set up noted i believe that with this cam anything below 114 wouldnt be too good. i have been speaking with john at FMS and he said a custom grind like 216/228 .588 114 would be a good set up with my truck. i figure ill be shifting about 6600 or something like that. i know the lower your LSA the higher rpm range you get bumped up and im not too into shifting at 7k. the cheaTR i think is on a 117 or 118 and i wouldnt go that high. just 114 probably. i was also considerinf a 221/226 or something less radical.

 

I doubt you will need that much exhaust duration with so little an intake charge. And if you arent going FI any time soon, i would still drop the lsa to at least a 112. I would try to make peak hp/tq way lower in the band. The truck intake is said to be effective up to 6200-6300 rpm so try to make your power before then. JMO

 

i thought dropping your LSA moved your rpm range up? guess i was wrong, just cuz thats why the lower LSA's dont idle as well because they are near a point where they dont run per se. the duration spread is the keep the power throughout the band, decent low end for the daily driving and good top end for the track. the truck intake work way up high but it just leaves room to meet the potential and i do plan to be switching to the LS6 intake sometime... maybe ill go with something a little less spread out like a 222/227 or some other thing. you are right i do not plan on going FI anytime soon other than nitrous maybe.

 

That's backwards. The lower (tighter) your LSA is, the narrower your powerband becomes. Tight LSAs increase the onset of your torque, but the powerband is narrower. Wider powerband comes from wider lsas.

Unless you have a FAST or a Vic. JR. You don't really need to worry about shifting over 6k, unless like F8L talked about in the other thread, you are doing so to avoid shifting right before the traps.

 

its pretty much impossible to avoid shifting over 6k with any decent cam out there though thats the problem.... thanks for the LSA clear up though. erik, what do you think about the grind? too radical? too much difference between intake and exhaust? im beginning to doubt this option in favor of something like 224/226 112 or something i dunno anymore TOO MANY CHOICES!!

 

this is just my opinion but you have an ext cab w/ 5.3
if i were running your setup, i wouldn't go with anything larger than a 224 in that big truck. this way you'll have decent daily driveability and still be able to put down some nice power. bigger cams are not necessarily the best way to maximize power unless you have the supporting mods to go with it. its your combination of parts that's makes it all work together.

 

yea i totally understand that and im pretty sure i have settled on getting the FMS F5 on a 112. 224/228 .588 .576...soon i will be getting some LT's to help out with the bigger exhaust duration and my 3200 really stalls at about 3400. john said that it would be a good set up and we have been emailing back and forth for about 2 weeks now...i have heard alot of good things about the 224 but i wanted something a little bigger and different