I was wondering if anyone has a sound clip of either of these preferebly in a standard compression 350, I doubt they are anything like my Performer RPM but im crossing my fingers tongue.gif

Thanks

I am running a 262 XE in a 9.5:1 350 .030 in my suburban, 2 1/2 inch exhaust...sounds good..tons of tourqe and mid range power for over 6000# ;)I would probably go with the 268 in a car for a little choppier Idle..

TROY

Aren't the XE262 cams for engines with under 9.0:1 c.r.? I had quite a few tell me I needed this cam in my bone stock LM1 350 out of a '78 Impala.

Dirty dog,
Im not sure were you got your info but I would say that cam would do fine at say 10.5:1
http://www.compcams.com/Community/Articles/Details.asp?ID=1649445315
http://www.compcams.com/Community/Articles/Details.asp?ID=176795408
They do offer the same cam for computor controlled engines but the lobe seperation is different
TROY

I run the XE262 in a 350 with about 9.5 static compression. It runs 13.70's in crappy mid-summer air, and has run a best of 13.54 at 99mph on a cool early spring day. This was at 3850 pounds race weight with a 3.42 gear and 2000 stall. I just got done swapping to the XE268 with 3.73's and a 3000 stall, so I'll know when the track opens back up in March which one runs better. As far as idle quality, I can't really say...I don't care how they sound, I care how they run. If it'll run a good number and idle like a stock cam, that works for me.

On Comp's website, the dyno runs on a 350... the 268 didn't make the improvement you'd think. I'd stick with the 262. I had one and loved it. Got 252 horse out of it. W/ a bad head/intake combo for that cam.

well according to dyno 2000 it will pick up 80 ft/lbs for me at 2000rpm over my performer RPM cam, and give me 360ft/lbs+ all the way to 5500. It will also get me around 350hp max compared to low low 300's now which is a nice jump.

Im in a situation where i have no time to rip down the motor and put in some flat top pistons, i would swap heads but thats just too expensive for nominal gains. I read that changing the stock head gasket can get my compression with the stock 350 heads in the low 9's but that seems optimistic.

I run the 268 cam in my 406 SBC and have been pleased with it. It made 440hp and 500ft-lbs. In a 406 with 9.75-1 compression it has little to no lope at 800rpm and pulls around 16 inches of vacumn at idle also.

it seems like the sound varys drastically from engine to engine. I've never heard an engine as mild as mine sound like it, but than again these people make gobs more power have engines that sound less powerful. I think the idle of my car scares more people who would be in shock to find out what hte cars actually making.

than again im in highschool, and im surrounded by kids that make claims like "i just got a cold air kit for my cavalier, now i can beat chad's chevelle"

ahh, so young, so stupid tongue.gif

Originally posted by Her Malibu:
Dirty dog,
Im not sure were you got your info but I would say that cam would do fine at say 10.5:1
http://www.compcams.com/Community/Articles/Details.asp?ID=1649445315
http://www.compcams.com/Community/Articles/Details.asp?ID=176795408
They do offer the same cam for computor controlled engines but the lobe seperation is different
TROY Awhile back I was asking about what a good cam would be for my 1971 Chevelle's 350 engine. As of now it is a bone stock 160 horse firebreathing LM1 350 out of a 1978 Impala, it has 882 heads and I believe either an 8.2-8.5 c.r. Alot of people told me the XE262 would be the ideal cam for that engine.

So I figured it was a good cam for such a low compression engine. I didn't think the same cam could be used in a higher compression engine. :confused:

These are the results I got with the XE-262S. I think if I had better flowing heads (currently 049 stock) I would have gone with the XE-268S just to move the hp range higher up the rpm band. Not bad results for bone stock heads though. It does idle quite nice though, ill try and get some sound clips for you.

http://members.shaw.ca/jamiebett4/images/Dyno%20Run.jpg

The XE268 is not a fender shaker...but it does have a nice "musclecar" sounding idle with just a little lump to it. Thats in a 9.4-1 355...lower compression will make it sound a little milder.

Originally posted by dirty_dawg:
Aren't the XE262 cams for engines with under 9.0:1 c.r.? I had quite a few tell me I needed this cam in my bone stock LM1 350 out of a '78 Impala. Sounds more like the HE cams, not the XE.

Jawez,

Thats nice amount of torque your making -over 500 from 2000 rpm to 4400. Where do you shift at, and have you run that thing yet?

Originally posted by Vince g:
Jawez,

Thats nice amount of torque your making -over 500 from 2000 rpm to 4400. Where do you shift at, and have you run that thing yet? Jawez,

That sheet looks great, and if its really streetable that would be an almost perfrct combo IMHO.

Can you post all your engine specs????

Vince g,

I havent run the car as of yet. Still trying to finish her up. Had to upgrade the cooling system as it was getting quite hot with the old radiator. Went with the Be-cool module (Part # 82008). Now I need to upgrade the charging system, for the dual electric fans. I still need to break everything in before I head to the strip. I figure ill be shifting around 5000-5200 rpm. Gotta try and use up all that torque. The 700r4 that I have has a 2200 stall which I hope should provide a wicked launch provided that I can hook. I'll post my numbers once I get some.

onabudget,

Refer to this post for my combo. There is also some helpful tuning adjustments that I made during the dyno pulls. Some people might find it useful.

http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi/topic/35/1004.html?

Cheers,

Jamie

My current cam is quite hte fender shaker, man im going to miss these days but hopefully tall that new torque will make up for it :D

What determines the "fender-shake" factor? the duration? the lift?

I dont remember your exact combo, but IIRC you had pretty low compression, like 8.5-1 or so? You should take a look at the crane 274H06. It has a tight lsa to add a little rumpity rump to the idle (it is a healthy sounding cam in a 350), and the shorter duration and tight lsa will make it come on hard in the low and midrange.
Its a combination of things that make one a "fender shaker". Duration and lobe seperation angle play the biggest part.

Ditto Travis on this one..

pdq67

The XE268 solid lifter cam we put in my Son's 327 sure has a raspy idle with open headers on the test stand, the best vacume we could pull at idle was 12. Once it's in the car with full exhaust we'll tune her in some more, but it sure sounds impressive @ 800rpms.

the 274 sacrifices almost 40ft/lbs at 2000rpm and peaks at 374ft/lbs while the 262 will get me 370ft/lbs + from 2000 to 4000rpm according to desktop dyno. The 268 also sacrifices my low end for a bit more top end.

So id give up 20ft/lbs from aroudn 2000 to 3000rpm but gain it from 5000 to 6000, which i guess would mean that the 262 would be more fun to drive with? but i just hate the idea of having the car sound "stock" lol.

My truck has a XE 262 and it sounds ok, not radical. You could have comp cams custom grind that cam with 108 degrees and get the sound you want. At least I think you can. Call them.

sounds expensive, isn't it 300 bucks for a custom grind? thats over my budget lol.

I saw that pro-action makes a set of 50cc heads for the sbc, if im at 8.5 with the stock heads how much compression would i get with the 50cc chambers? Would i be able to run on 91/92/93 (it seems to vary around here)?

Originally posted by Jawez:
Refer to this post for my combo. There is also some helpful tuning adjustments that I made during the dyno pulls. Some people might find it useful.

http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi/topic/35/1004.html?

Cheers,

Jamie Jamie,

That's good stuff. I missed that thread before because I don't go to that section of TC as often as the Performance forum. I like that you showed the tuning steps also. Thanks for sharing. graemlins/thumbsup.gif Can't wait to see what it does at the strip.

Rod

Cheap boost for your compression run Vortec heads out of 96 / up Chevy 350. The pull parts have the for like $30. Can get an alumn intake of ebay under $50 as did I. They are about 64cc and without a large cam need no work. If you start playing with bigger cams they have to be worked, something about clearance. Yea run the small cam and you be fine Look what that oen guy says when he went bigger he put a stall and all in. Work and money along w his is not daily driver but a race car. I am about to do this to a 77 Impala two I picked up to turn. Or least the 262 cam if I can find an extra set of heads for this project if its worth it? Should gain about 30 hp w the heads I hope? I just dont want to give up the heads I have sitting for a future project car cost me $125 pair at a local yard. So going to the pick n pull truck part. They even have 1/2 days here. :)

I ran the Comp Cam w a 460 like lift in a stock Chevy 8.5 compression crate 350 engine and had to put the stock came in as it ran way better. Noticed no idle difference. They tried to sell me a 480 lift but I brought it back and took the 460. I had the 260h series came in a 72 Elky stock 350 bored 30 over aka 355 and it ran fast w torque all stock expect that (stock manifolds intake ect). You can almost always over cam a stock street car but can almost never under cam a stock street car. Too much cam on stock engine no more tire chirping.

They should make a cheap cam for us guys who want loppy idle but dont want to run tall gears, stalls and suck up tons of gas. Just want a little more power and sound cool

Here a link to that Chevy Mag online the cam and vortec heads. I like watching power block tv on weekends mornings on Spike Tv they put some bad cars together even ones there is nothing left. Wow

http://www.chevyhiperformance.com/techarticles/0611_chpp_used_auto_performance_parts/impersonator.html

Uhhh, this post is over 4 years old.