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cams

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Posted by: papa bear

online line at summit they have cam grinds comp cams xtreme energy. intake 0.475 exhaust lift 0.450 i think this is for like blower or nitrous set ups wondering if anyone has done performance cams or had a custom grind installed in a 4.6 4 valve is it worth it i remembered when i would install a cam in 350 chevy or 302 ford the car would rip i know they are like over $1000 but compared to rear gears would this be even more helpful

Posted by: evillally

Custom cams are a waste for N/A Modular setups. You will destroy all low-end torque. The only Modulars that would benefit would be blown setups. Not to mention that $1,400 for cams is beyond ridiculous.

Save your money and throw in a set of 4.30 rear gears, a chip, and headers.

Posted by: Phantom&RedGoat2004

Comp grind #XE270AH-114 & XE270BH-114 are both listed as "street/strip" cams with a powerband between 1800-6200rpm. I'd have to agree that you'd lose a certain amount of low end torque, but the 4.6 is a high winder, and the hp gains with cams are going to be at the top end. The way I've always heard it, rear gears are the most notable change you can make to your car when using the "SOP dyno." A cam swap would be much happier with a torque converter and gears anyway, so you might consider doing the gears first (they're also cheaper to buy), and then go for the cams.

Posted by: NateRW21

Quote:

Originally Posted by papa bear

online line at summit they have cam grinds comp cams xtreme energy. intake 0.475 exhaust lift 0.450 i think this is for like blower or nitrous set ups wondering if anyone has done performance cams or had a custom grind installed in a 4.6 4 valve is it worth it i remembered when i would install a cam in 350 chevy or 302 ford the car would rip i know they are like over $1000 but compared to rear gears would this be even more helpful

Drawing from my knowledge on the mustangs DOHC and mustang/truck SOHC... Gains are there, but usually cam swaps alone don't give you the kind of results you'd expect when compairing to a conventional push-rod V8. Plus, in order to really get the benifits from the aftermarket cams, it's almost essential to get adjustable cam gears. Some cobra guys have found their cams off by as much as 5-6 degrees with as much as 10 degrees variance between left and right cams. So look at throwing another what, $400 on there for timing adjustable gears.

I'm not sure what head you're running, but patriot performance has CNC'ed 99-01 cobra DOHC heads which produce some pretty solid flow numbers (and sell for about $1600 w/exchange). If you're actually considering doing cams, might just fill the piggy bank a bit more and do heads and cams. Although the two will show their most value in a forced induction set-up, you would see some pretty decent gains NA because the two are mutually benifical parts and would work to compound their gains.

But, low-end torque loss is a possibility... however, as stated above... that can be negated through gears and a converter swap. I've learned to look at vehicle performance as a package (or system), not as individual parts. The gears you think are ideal today, after swapping heads, cams and converter tomorrow might not be quite steep enough.

I think in the long run, it's about what you want the end-state of the vehicle to be. Just my two cents

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