Billysvette

Guys looking to get another cam,have any of you ever had this cam or are running it now. or know about this cam?

comp cams-304HR
part#-12-460-8
RPM-3000 to 6500
adv,duration 304,304
adv,lift 600,600
lc-110

Thanks for any help you can give me. Bill

Billysvette

ttt

73BLWN

I guess nobody has ran the 304HR. As I recall this is what you are currently running edelbrock hydraulic roller cam 234/238 dur at 050, 539/548 lift. It would seem to be a rather significant change in your cam profile. The extra lift should help compliment your AFR 215's. You'll also learn whether or not that 110 vs 114 lobe seperation is really a concern for blowers. If your looking for encouragement, I say go for it! I bet it sounds nasty, and pulls harder everywhere.

It would be nice if someone could desktop dyno your existing combo, and then the one with this cam to see the difference's.

Good Luck.

DRIVESHAFT

I haven't run a blower myself, but it has always been my understanding that you need to run a dual pattern cam (extra exhaust duration) with a blower.
Obviously a single pattern cam will work, but it isnt optimum.

Billysvette

What cams have you messed with?the edelbrock cam works good,but that article from BDS that said 110 lc with max lift and max duration is what you want for a blower.

Billysvette

Yes,you are right,but i am going to try something ,a 110 lc cam.

L-82kid

Im interested in this topic as well. I'm doing a 144 blower on 357ci and still undecided on camshaft. I was thinking split pattern hyd roller and going 112lca with duration in 230in 240exh range. I want a nice muscle car rough idle and good pull up to 6,000-6,200rpm. But I also want crazy low torque so I'm afraid of going too big with cam selection. I dont have any experience with blowers yet.

If your current cam runs good why are you changing it? looking for more power, diff idle quality, rpm range change?

Billysvette

Im changing because of a article i read that said 110 lc is good to run on blowers,and i want a rougher idle then what i got,my 383 settles this cam down alot.The edelbrock 2201 cam works good though,i am going to experiment to see if a blower will run better with 110 lc.I cant stop tinkering Also i got a little money back from taxes .also want to add the new cam that i get may not run as good as what i have now,we will see

Billysvette

Also im afraid of the 304 d-600 L,that it might be a dog down low,i was wondering if the blower would help with that if its an issue.

Billysvette

Blower drive service says 110 lc works best with blowers that run gas,but others say 112 to 114 lc is the best,so this is the dilemma i have ,i want the best,and i like to tinker ,so i must find out.

I have other cams im looking at also along with the first one i wrote about.

comp cams 12-443-8 extreme energy retro fit cam
Dur-294/300, lift-540/562. LC 110 2800 to 6100 rpm

howards cams 110345-10 max torque retro fit cam

Dur- 298/305 , lift-562/578 , LC 110 2800 to 6600 rpm

lunati cams 50162
Dur- 300/310, lift- 525/540. LC 110 , 2200 to 6800 rpm.

what do you think? remember i want a bad *** rough idle that will run.

AutoX-Z06

If it is a dog down low just add more boost and hope it stays together on the top end. lol

v2racing

The lobe separation and overlap needs will depend a lot on the low and mid lift flows your heads have. The better the low lift flows on each side, the less overlap it needs. Too much overlap (tight lobe centers) with very good low and mid lift flows will bleed off too much boost at low and mid range rpm and cost you low and mid range power.

badrad

This might help you, http://www.compcams.com/Community/Ar...?ID=-603962390. I'm not sure how the roots vs centrifugal blowers compare though. I have a Vortech set up and not sure which cam to use at this point, I have 114 and 110 LSA.

gkull

I was at Summit racing this weekend and they do have the Weiand 177 for small blocks.

gkull

Can you remind us all what exactly you have in the way of an engine and how much boost do you actually have?

If you know what you have it is easy to move to to another step.

I've been around for a bunch of years and gone to a bunch of car show-n-shines. There is always the car owners that don't know a damn thing about cars or how they run, but they want the sound and they want to be revving it up and down for everybody to hear. Well sadley most of those cars really don't perform worth a damn and some car shop has sepperated some mindless fat wallet owner out of his cash to give him just what he wanted!

Rmorgan&11

you can play around with this in spare time >

http://www.compcams.com/Camquest/

almost like desktop dyno ?

Don't know how accurate it is , ran a few combos and managed to get a projected 580hp out of my 327 NA..no blower , no nitrous ...LOL

Billysvette

Yes ,i already did that,and i dont know if its right or not,it told me that a 110 lc cam was better and then it would turn around and tell me a 114 lc cam is better,i dont trust it.

73BLWN

Here is an older video of my motor.I posted this a while back. It will give you an idea of what it my cam sounds like. The microphone on the little Nikon camera over amplifies the valve train when your around the engine, but the exhaust sounds about right from the rear.
Motown 400sbc, Oliver Rods, Ohio Crankshaft, MLS headgaskets, ARP Main and Head Studs.
Cam 12-704-8 Solid Roller 255/262 (.050) .575/.575 I run 1.65 shaft rockers so its really .632/.632 114 Lobe Centerline.
1 3/4" Supercomps, 3" duals, Flowmaster 40's.
JE Extreme Pistons, 8.5:1, Pro Line 230's, Modified 600 holleys 50cc accelerators.

http://www.dailymotion.com/videos/MartinSykes/1

It runs great. People are blown away (pun intended) with how nice it drives, and say wow wow wow wow for hours after a ride. Even with the boost turned down to 3 psi there is no low end bog. At 6psi, it's a handful to say the least.

I've ran all the Nitrous HP's (144 blower, 400 sbc, 190 AFR, 7 psi) except 12-564-4. Low end power with these cams in an automatic 5300 pound 4X4 was never a problem, I even towed an 1850 Lund Tyee with all of these cams.

I ran a 350sbc AFR 190s with the 292 Magnum with 1.6 rockers. I'd say that was the nastiest sounding of all the cams. I never thought there was an issue with low end power.

I'm just sharing my experience, I'm not saying I'm any form of an expert.
Gkull is right many motors are built stricktly for sound and presence and do not perform.
Driveshaft is correct in many advise on split pattern cams.

I'm still experimenting, and haven't found a bad cam that lacked driveability or low end power from any of the ones I listed. Blowers must cover up poor cam selection rather well.