What do you think?

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stroker mike

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If you compare specs of comp's 268H and xe262 you will see both have an intake of 218 at .050, but the 262 has less adv. duration. I see a wider power band listed for the xe as well. Comp's tech said he'd rather see me in a xe262, so I was looking around at the cars on you tube and saw a vette with a 268H in it and OH MY GOSH it sounded awesome, and I also saw a 302 torino with a xe262 in it and it appeared to be pretty ok, too, but not as responsive sorta, but I drive a mopar and all that don't apply to me, so I'd like to ask who around here has a 268H in a 318 with big heads like mine, j heads, and what happened to you, and what is the bottom line? As well as the xe262, does anyone here have that cam right now and hows it do for you? Thanks! I was gonna copy dusturb318's cam from slp but saw the 268H for 121.00 on ebay new, whoa! That is what I'm talkin about!
 
is the 268 a dual pattern? for that engine i would run a dual pattern. you will get more torque. the xe cams i think are all dual pattern.
 
On a chevy the rod to bore stoke ratios are not the same as a 318, I think they are faster, so they use a little more cam in terms of duration. But you need to keep in mind that more overlap is less low end power IE torque. If you can raise the compression to compensate you are O kthough to a point. Also I would go as said above with a dual split profile type.


Always better to under cam than over if given a choice...
 
chevys also have the slowest rate of lift, that is why they use a less agressive duration @ .050.
 
A friend told me the xe262 is a better cam, outright. He said it's about the rate of lift. Jim at racer brown also recommended a 262 adv. 210 at .050, I have noticed the xe268 has significantly more duration than the 268H I guess they aren't directly comparable in terms of application. I don't think The xe268 would do well in my combo, but the characteristics of these new profiles are beyond my ability to decipher. Am I mistaken in my belief that an xe268 would work in the same application as the 268H, due to the grind differences?
 
An xe is a whole different animal than the old grinds,they have a very agrressive lobe profile with a smooth closing so they are designed to be as close to roller type cam as you can get with a hydraulic.They also build cylinder psi and improve idle quality which is why they seem a little less rompy for a given duration,but they will out perform the older straight grinds hands down.Ive used alot of these and have alot of friends using them as well and If your really looking for max performance on the street/strip they are really hard to beat.
 
lead69 said:
An xe is a whole different animal than the old grinds,they have a very agrressive lobe profile with a smooth closing so they are designed to be as close to roller type cam as you can get with a hydraulic.They also build cylinder psi and improve idle quality which is why they seem a little less rompy for a given duration,but they will out perform the older straight grinds hands down.Ive used alot of these and have alot of friends using them as well and If your really looking for max performance on the street/strip they are really hard to beat.
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I agree...my little 340 has a MP .508 lift Purple cam. I believe it's a straight grind? Even w/ 11.1 compression and headers it's too much cam for the 3.23 gears and mildly worked stock heads/Torker & 650 DP. I'm just plain not in that RPM range. I'm seriously thinking about swapping to a XE268H or XE274H myself...
 
I recently installed a XE268 as well as mild ported 302 heads in my 318. Car is '64 Valiant, 4spd with 3.91s. I havn't run it for time as of yet, but I can tell you it runs like a bear, with no bottom end lag, and idles real nice with a slight lope. Mike
 
ValiantMike said:
I recently installed a XE268 as well as mild ported 302 heads in my 318. Car is '64 Valiant, 4spd with 3.91s. I havn't run it for time as of yet, but I can tell you it runs like a bear, with no bottom end lag, and idles real nice with a slight lope. Mike
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mike i had wondered how that combo worked for you....i hadn't heard or had missed it. glad to see this combo works as well as it does. if you get a chance post a sound clip of it in the exhaust section so i can hear it idle. i would like to see what the cam sounds like in it.
 
I've run the XE268 in a 9.8:1 360 (early small open chamber heads milled a ton), the XE262 in an 8:1 360 with factory 308 heads, and the 268H in a factory '68 340 and then an 8.6:1 318. The XE268 is a great all purpose cam. Using it in a 318 will be a little more lumpy than the larger displacements, but it will run fine if you're truely 10:1. The 268H passed emmissions for 3 years (CT idle inspection) and had a bit more ragged idle. But again, I got it to pass emissions with some careful setup. So it's radical sounding, but not really radical. It dod pull to 7K rpm, and with the low compression 318, with 2.02 valve X heads and stock pistons, there wasnt too much of a feelable loss in torque (in a '74 E body, 3.23 gearing and a 4sp). I broke the 340, swapped the cam and top end into a core I had, and ran that for a year. They had dropped the emissions testing for that car at that point. I doubt it would have passed. The XE262 is in my truck, and it idles smoothly at 650rpm in the low compression '87 360. It pulls pretty good, but it's all done at 4500 in that truck (1 ton w/33s and 4.10s). Given the choices you have, I would go with the 268H. It wont get into any detonation problems with junk gas, it will sound good, and the small valve/small port 302s are a real nice match for it. I ran a stock '71 T quad intake and carb. A Performer 318 with a 650ish carb would really be a nice combo. The XE268 might just give too much cylinder pressure with 10:1.
 
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