Are comp cams xtreme energy cams any good? I have a new one sitting here - Yellow Bullet Forums

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Old 10-29-2007, 07:42 PM   #1
darkostoj
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Default Are comp cams xtreme energy cams any good? I have a new one sitting here

I am putting together a 355 chevy right now and have a new comp cams xtreme xe274h cam. The specs are

274/286 adv. duration
230/235 dur @.50
.490/.490 lift w/1.5 rocker
110LSA

Here is a quick rundown on specs and the car

355
stock crank/rods w/ arp bolts
TRW L2256 forged pistons 10:1 comp
Early small block 302 heads 2.02/1.6 valve heads with the exhaust crossovers(or might go aluminum, opinions on if I should keep these?)
havent picked the intake/carb yet but have a weiand stealth sitting on the shelf i may use
th350 trans with a 2800 stall
3.55 rear gear
150 NOS cheater shot
standard power steering & alt

I'd like to tune the car to perform best n/a and not lose a lot of the nitrous gain....is that possible?
I also want the car to have a real lopey idle and sound mean. Should I use the cam I have now or get one custom ground? If I get a new one it will be a solid flat tappet.
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Old 11-26-2007, 04:59 PM   #2
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Hey Darkostoj - I am a ford 5.0 guy but unless you are going custom you cannot go wrong with a Comp Cam. Their designs are good with fast ramp rates (at least for the rollers) and give great results in the horsepower/torque department. I am going to be putting one in my '88 Mustang Coupe here shortly. It is said that "custom" is the way to go for the most bang, but Comp Cams are definitely not a bad cam IMHO and the duration of that particular cam looks good for a healthy street/strip motor. Good Luck.
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Old 11-26-2007, 06:04 PM   #3
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make sure you call Comp cams & get there latest break in instructions they have taken some important additives out of engine oil for emissions reasons and it will cause youre cam to fail ........................... I have built a 355 with a set of dart factory replacement type heads a performer intake with the extreem energy 268 a 600 holley 2200 stall in a 88 caprice classic (4000lbs+) with a 700r4 trans 373 posi it runs 14.50's it could probably use a performer rpm & a 650 though & some stickey tires but your combo in a 3500# car should run low 13's easily set up right.......................hope this helps................Glenn
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Old 11-26-2007, 08:31 PM   #4
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I HAVE A SOLID LIFTER EXTREME ENERGY CAM IN MY 408 SBC AND LOVE IT
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Old 11-28-2007, 09:44 PM   #5
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Your going to have detonation issues running the old 186 cast iron heads if your compression is 10.0:1. Here's what I recommend: go with alum heads: Trick Flow or AFR's with 180cc intake runners with say 60-64cc chambers w/ no exhaust crossovers. You can get away with more static compression running pump gas with alum heads. If you have the funds, go with a solid roller. If not, do step up to a solid lifter cam. With the amount of spray you've indicated you plan to hit it with and how you want it to run good when running n/a, go with n/a profile. Something like this for either cam: 108 LSA, 240/250 duration @ 050, .500-,510 lift both sides. The 108 LSA will give you the lope you're looking for. Intake and carb: get a good open plenum intake like a Victor Jr and a good HP 750 carb. If you go with a solid lifter cam, do follow the break-in procedures to the "T". Todays automotive oils have much less zinc in them and this is what's been causing a lot of failures when breaking in new cams. Here's the secret: get Shell Rotella 15w-40 oil for diesel engines. This oil has a fair amount of zinc still in it. It is good stuff and I like it. If you happen to live in a cold environment, you don't want to run it in the winter months. Hope this helps. This combo will rock pretty good in your street car.
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Old 11-30-2007, 08:26 PM   #6
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I ran the same XE274 cam in a 10:1 355 with 200cc sportsman II heads

10" TS convertor, 4:10 gear, TH350 trans

750hp on RPM intake with 1" spacer

1 5/8" hookers thru 2 1/2" exhaust

3500lb cutlass. 12.64 at 106 with a 1.71 short time.

Drove for it year round for 3 years, its a little noisy cuz it has a somewhat aggresive ramp on the lobe, but dont be overly concerned, it ran flawlessly and didnt wear any shit out..
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Old 01-03-2008, 09:57 PM   #7
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Ive also had great luck with the 274 grind. In a 1978 monte carlo, 9.1 comp , vortec heads, 750 carb, rpm airgap, 2800-3200 stall on real radial tires.....12.72@106....with a gn rear, 3.42 gears
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Old 01-15-2008, 09:29 AM   #8
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Default hey glenn?

Quote:
Originally Posted by 68 nova 10.5 View Post
make sure you call Comp cams & get there latest break in instructions they have taken some important additives out of engine oil for emissions reasons and it will cause youre cam to fail ........................... I have built a 355 with a set of dart factory replacement type heads a performer intake with the extreem energy 268 a 600 holley 2200 stall in a 88 caprice classic (4000lbs+) with a 700r4 trans 373 posi it runs 14.50's it could probably use a performer rpm & a 650 though & some stickey tires but your combo in a 3500# car should run low 13's easily set up right.......................hope this helps................Glenn
you live in the westland/garden city area?car looks familiar.nice nova
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Old 01-15-2008, 09:54 PM   #9
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Quote:
Originally Posted by n2novas View Post
you live in the westland/garden city area?car looks familiar.nice nova
Thanks for the compliment you have a PM....................Glenn
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Old 02-18-2008, 12:09 PM   #10
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wow, there seems to be alot of local dudes on this site! makes a brutha feel welcome!
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Old 04-15-2008, 09:18 AM   #11
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I just helped a buddy assemble his 355 with 2256 pistons and 186 heads shaved to 62cc with .039 quench. He went with a solid from howards 246/252 @ 50 on a 106 and we took it to the track 2 weeks ago his best with no burnout was a 12.9 and he has plenty left in it. I think he will get 12.6's easy. His car is a full weight all steel full interior 70 camaro with ac still and factory wheels on it. 3.42 gear and jegs 2,800 stall.
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Old 04-15-2008, 12:40 PM   #12
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We've run an Extreme Street solid roller for the last few years now..car's been 10.2's with it.
Lobe Number 4878 and 4879
.637 / .646
Should be better this season with a little more compression in the motor too!
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Old 09-30-2008, 12:49 AM   #13
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The XE grinds are awesome, I install them in probably 80% of my "street" builds every year. But I have to say 150 shot on stock rods and crank is a little scary.
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