Custom Ground Cams

[SappySE107]

The specs I just gave you ARE 94 spec.

[Gemmer]

well I know that, Im just asking whats up with THESE specs

Int: 205 Degree Duration @ .050", Lift = .369"
Exh: 213 Degree Duration @ .050", Lift = .373"

[SappySE107]

What numbers did you put in to try to get those specs into DD2K?

[SappySE107]

Looking through my excel files I found the worksheet I made with the stock specs, 13 degree retard, and the regrind specs that were recommended by alan johnson. Ill dig up the regrind specs after I copy paste this mofo.

http://60degreev6.com/Sappy/DOHCCam/34DOHCcamtiming.xls

Intake lift: .372
Exhaust lift: .384
Seat to Seat Specs
IVO: 23 BTDC
IVC: 67 ABDC
EVO: 71 BBDC
EVC: 29 ATDC

Those are actual specs that they can do. Thats 270 intake duration and 280 exhaust duration seat to seat. They did mention advancing one cam a few degrees and retarding the other a few, 2 and 3 or 3 and 4 I think. Someone else can play around with that if they want. That should give you a general idea of how far the regrind can go though for duration and lift, give some duration, take some lift and so on. Quick comparison, stock is 242 degrees duration for intake and 253 duration on the exhaust. Thats 28 degrees more for intake and 27 for exhaust. Thats "advertised duration" though, its the .050 specs that really matter. I dont have those for the regrind though so I dunno what that info is worth to anyone playing with DD2K and wondering what the .050 specs on a regrind could be.

[Lyle's GTP]

Damn, this engine loves the high-end. Fuck, an 84HP difference at 8000, that's insane! So those are the specs he can get just by regrinding our stock cams?

Lyle

[SappySE107]

Yup, but remember this is just simulation.

[Lyle's GTP]

It'is just a simulation but it should be able to tell us if one cam design is better than another shouldn't it? When it comes down to it the numbers may be a little different. But we should be able to feel comfortable that we made the best choice.

Lyle

[Gemmer]

DD2k is showing almost the same numbers as the w41 specs, but with 1-2 more hp and tq over rpm range until about 6-7k where it loses 1 or 2...

with 2 intake adv and 3 exhaust ret it loses 3-4, but at 6,500RPM+ it gains 3-4 (at 8,000 it gains 10)

with 3 adv and 4 ret it loses over entire range

nothing will show an 80 hp gain (in DD) untill headers are added

but as sappy said, the #s are measured seat to seat while w41 is @.050 and niether are exact and on top of that it is just a simulation so there will be a bunch innacuracies

I like the new specs though

[OldSkoolGP]

I have a question. Has anyone actually bought a set of the reground cams yet and run them in a car?

[SappySE107]

Supposedly someone had a while back, over a year ago. I sorta have my doubts though cause the guy wanted me to tune his car but he never replied when I asked him about the cam. If you needed your car tuned cause of custom cams, would you stop talking to me cause I asked you about the cams? I think not.

[34T]

Gemmer: when you run these simulations, are you putting in any other variables? Or is everything stock? You mentioned getting 80hp when headers are added. That is a big change, I assume that you did ONLY the new cam #s and then headers? Anything else? Intake manifold, for example? I am quite interested in the Mike Smith intake and wonder if there is some way to plug THAT into DD? somehow....??

[Gemmer]

yea, only cam #s on a stock engine, then sometimes I play around to see what other changes do.

Some of the specs arent too accurate, like if he runs short runners, it might be hard to input, but if you tell me the what % greater than stock CFM an intake flows I or someone else can punch in the #s and give a general idea

[butchville]

reed cams in atlanta told a friend they'd regrind for $100. a cam this may be cheaper by volume

[Gemmer]

was that on a DOHC and this place got a sight or a number or an address?

400 total sounds nice

[pocket-rocket]

I would say this is it, http://www.reedcams.com/ Then again, that doesn't say Atlanta, but doesn't Atlanta have different parts kinda like L.A. and other major huge ass cities?