im going to be ordering a custom ground nitrous cam from Comp this week, i was just wondering what all information i will need to have at the ready so that when im talking with one of the tech guys ill have everything and not be scrambling around trying to find specs. thanks for the help guys!

 

your heads, your intake, what type of nitrous spray bar you have, how much you plan to spray, cubic inches (possibly bore and stroke), and carb would all be nice to have handy, really you'll probably just need to tell them what it is and what power you're wanting to make on and off spray, then what ammount you're willing to spray and they'll work it out from there.

 

how much does a custom ground cam run? i havent heard much about custom grind cams.

 

since im going solid flat tappet, i cant see it being much more than 200 bucks for the custom grind obvioiulsy roller cams will be a bit pricier, but when i get off the phone with comp ill let you know!

 

Comp Cams? They are going to try and sell you an off-the-shelf cam unless you give them specs for the exact cam that you want in terms of duration LSA, ICL, etc.

 

anyone have suggestions on what company to call to get a custom ground cam?

 

With the 100's of cams everyone makes you'll probably be able to find one so close to what you need it wouldn't be worth the extra change, but all of the companies make custom grinds, usually you just can't get much better than one they already make. Do you have an odd displacement engine, or something particular about your setup that warrants the need for a custom ground cam?

 

385 cid (.040 over 383) the reason i want a custom ground cam is that all the off the shelf nitrous cams i see are hydraulic and i want solid and the biggest ive seen in the hyd. is .525 lift i was wanting something bigger to match my stall (4400) and the rest of my motor (11:1 CR, afr 210 race heads, 100 shot plate and 200 direct port, super vic intake and 750 dp fully worked to 840cfm)

 

That would warrant a custom ground cam, give Comp a call with that information.

 

Yup, you will want a custom for that setup. You could give Ultradyne cams a call too and see what they have to offer.

 

just got off the phone with matt from comp, got me set up with these specs:

265/276 dur @.050, .601/.594 lift with 1.6 rockers, on 110 lsa solid flat tappet. should pull from 3200-7200 rpms

 

what was the cost if you dont mind me asking?

 

WOW, sounds like it is in the ball park for your parts. What did they guess it will idle at ? 1200 RPM warm? I guess that isn't going into a street car. It should be a lot of fun with that setup.

 

i havent bought it yet, i just got it speced out im waiting for payday on friday to get it. i think it's around 200 i forgot to ask though. yeah it'll idle around 12-1300 rpms in park/neutral, and you're correct its mainly a strip car, but i'll still go to the car club meets every sat night its probably gonna have to run on 100 octane though and then my stand alone fuel system will have 110 or 116 in it...300 shot 2 stage gone lean wouldnt be a pretty site

 

Yeah that's goin to be one wild setup. Glad that worked out for you; 200 is absolutly affordable!

 

yeah i think soo 800+ at the wheels on the juice if tuned correctly, just gotta figure out how to keep it straight and get it out of the hole in a decent manner

 

through a comp dealer the price for a comp custom grind should be the same as an off the shelf grind, the only difference is that it will take 2 days vs a day to ship, and the custom is non returnable

 

Any reason for not going with a tighter LSA? 106 perhaps?

11:1 on AL heads with a gargantuan cam like that, I wouldn't think would need race gas in the tank, just in the stand alone for the nitrous.
But that's just my wild a** guesses

 

umm im not sure why it doesnt have a tighter lsa, im just going by what the tech guys gave me after i gave them every single spec i could, they ask you everything, motor specs, tranny specs, what kinda car, the weight, what kind of tires, what size, gear size, i mean EVERYTHING, so im sure they got me set up with the right cam. the reason i say it'll run on 100 octane is that my CR will probably be higher because i forgot the block was decked, and i dont really like running more than 10.5 CR on pump gas to begin with, thats just a person preference though

 

That cam sounds good. The reasson thay put it on a 110 is because all the cam companys like the wider lobe sep on nitrous and turbo or blower motors. I had a solid roller in my 380 in motor with a 106 lobe sep ran good on motor and would go bottom 10s at 140mph it would spin the tires and pull 1.6 60 ft times. With the same tune up on the plate and a custom grind from cam motion with a 110 lobe sep and slightly bigger dur and lift the car picked up and went 9.70 at 140 mph car didnt make any more hp. but it 60ft a 1.40 and 330 ft times were also way better. It also went a little faster on motor.

 

I hate to hijack your thread here but comp cams wants me to run a 255/262@.050 with a .575 lift solid roller. This would be for a 1000hp blown 383 with 1.6 rockers it seems small for a blower.

 

you dont need huge cams when you're running a boosted motor, alot of tpi guys just use the stock cam or ones just a little bigger, a lot of the lsx guys run the stock ls6 cams out of the zo6 vettes

 

N2O cam… I’m surprised that they didn’t spec it with a 114LSA. 110 is considered average for an SBC, as the width of the power band gets less important than the absolute peak in the middle of it (as the chassis is more optimized for a narrow range), tighter LSA’s tend to work better, and vice versa, but with N2O in the picture, it’s all about pressure and blowdown…

 

or blow..by! my ring gap is gonna be huge, i think im going to run a pcv canister to catch it all lol

and like i said, im not n20 cam expert so i'll leave it to the guys at comp..even if all they do is punch it in a calculator that figures it out itself. if it ends up not running right, i'll just go with a different manufacuter, but for 120 bucks for a custom grind, ill start with that.

 

Try calling comp 3 or so times, at different times and days of the week and you might change your mind. After trying it a few times you’ll start to get the feeling that they have a dart board and blind fold that they use to help select cams…

 

is comp really that shiesty? have any suggestion on a company i should go with?

 

no there not shieisty, its just that every body has there own idea of the "best application" thats why some cars are faster than others with similar builds. try Howards racing components, they have there ear close to the custom racing scene, and are less "corporate" and may take a more personal aproach to your needs!