anyone using a Comp high energy 268 H series cam on a 402

[>X<]

wehn i bought my 72 custom 20 the guy gav me some parts that he had bought for the motor (402 bb) in the box, including a comp cams drivetrain rebuild kit with a 268 H high energy cam and all the accessories, i was reading in summit that tis is a towing cam, do i want to use this for my "72 " project, i want something that rumbles, can i upgrade to a magnum cam but kep all the accessories that came with the kit?i am geting someone to build the motor for me,is it possible to make a 450 hp 402 with this cam? thanks in advance

[70cst]

I have a 70cst with a factory 402BB and 400 auto. with 3:42 posi, & Thorly Headers. The Comp Cam I now have is XE268H-10 but I'm going to replace it with a Comp series 262 cam. Why you ask. The 268 was to wild for me. I had to switch to a Stall Converter and I did not like the way it shifted. I want somethinf tamer to work with my A/C. The 268 has a great idle/lope and sound. Good low end-mid range. In my old age I don't like my neck being snapped (know what I mean)plus It's to much cam for my son to play around with. To answer your question: the 268 has a great lope and sound, good low-mid range torque. Again I would contact Comp to get specifics. I would guess most aftermarket cams to wild and are not matched to the engine which leads to disappointments. Just my .0002 cents worth.
Regards,
Dewayne 70cst

[>X<]

i guess i'll stay with the 268, i'm 17 and lke the iea of my neck being jerked with every gear shift, as long a i can smoke all the civics around here i can deal with it, thanks for the advice dewayne, sean

[aerotest]

The XE is a much more aggressive profile and will act differently than the standard 268. I have the later in my 396. Has a nice little hit at idle and pulls good from 2k up. I recommend a higher stall. I run a 2600 and it’s a little high for 3.08 gears. 2200-2400 is about right. Higher stall helps with high idle shift clunk and A/C idle too. You need to run the 911-16 springs which means all new locks and retainers. As for power....no way 450hp....more like 350 hp with headers and intake on the stock comp ratio. If you raise it to 10.5 then maybe closer to 400. 450 you will need a better set of heads. At that point save your money and build a 454 or 496. My 396 is has stock comp and a 268. It will move out pretty good. Stay safe and race it in the track not the street.

[wesmigletz]

We put a 268 HE cam in my son’s 68 Camaro. The engine was a well used small block we pulled from a 71 GMC, topped it with vortec heads. With a 3.42 posi, TH350, and stock converter, his car went 13.91@102 at Fontana with a lot of wheel spin.

Slight lope at idle. Car drives nice and would blow the tires away at will. You probably wouln’t need a stall converter for your 402.

[68Gold/white]

The 268 H is a very good cam for that 402. There are factors that need to be known, though. Most importantly the compression ratio. Do you know what the combustion chamber volume is??? What heads are you using?
THe 268H can stand some compression, up to about the low 9:1 area. Just make sure it is NOT the 268h XE cam, do not, do not, use the XE cam!!!

Torque converters have evolved a bunch, especially in the last 10 years, and continue to do so!!!
A torque converter made specifically to match your car/engine is the best performance improvement a person can make. The good ones cost money, though...
Cliff Ruggles, the Quadrajet "go-to" guy sells converters made for street driven vehicles. He doesn't manufacture them, he does sell them. A converter that is not loose on the street, but provides the "WOW" factor when you hammer the throttle, is a awesome thing!!! www.cliffshighperformance.com

[weim55]

I know this doesn’t answer your question directly but this might be something to think about: since you mentioned you like the idea of a little neck snapping performance, I wouldn’t mess with that 402. Go to the junkyard and pick up a 454 roller motor. I noticed them in junkyards here in Colorado all the time and they usually go to the crusher because everybody wants an LS these days. I speak from experience when I say I would never rebuild a 396 or 402 for anything other than a restoration. If performance is what you’re after it’s more than worth it to step up to a 454. It’s actually a bit cheaper to build a flat tappet 454 than a 402 and the torque increase and fun factor goes way up. A 454 has so much torque you don’t even need to mess with aftermarket torque converters, your stock one will work just fine. What I don’t have experience with is a 454 roller motor rebuild and swap. Do an evening worth of reading and I’m sure you can find out the little details that will make the swap a slightly different from the typical old style 402/454. A slightly more difficult find but still very doable is to pick up a flat tappet 454 core and use your 268H in that. That cam would work great in an otherwise stock 454 with some compression. Just my two cents ......

Steve weim55 Colorado