312 ford reverse rotation cam

[LCaverly]

Ok guys doing a reverse rotation ford 312 marine y block and the owner wants a little more poop. current cam checks out at 214,214 .414, .414 on a 114 lobe sep I would like to do a 218 224 on a 112 with .480 lift . I figure this will get me in the 260-275 hp range which would be a big improvement on the current 215 hp. Do any of you guy's know where to get a reverse rotation cam done or possibly current cam reground.
Len C

[Brktracer]

My boat has a 351W RR engine and Comp custom ground the cam. Have you called them? Also, Bullet used to custom grind SBF cams as well. Sure the 312 is different. Having a casting is the issue. You will have to call.

[pdq67]

Might see if Delta out in the NW will regrind your/a core for you?

Delta Camshafts
Phone: (800) 562-5500
2366 Tacoma AVE S.
Tacoma, WA 98402
sales@deltacam.com

pdq67

[DaveMcLain]

Give Steve Demos, Demos' Cams a call he has some lobes that will work well if your core is good.

http://demoscams.com/

706.367.2417

[Ozonkiller]

Talk to Laurie at Web cams

[Trosky]

Back in the 70's I had a pair of 312 boat engines one standard rotation one reverse rotation. The standard one had a timing chain the reverse one had gear to gear driving the cam no idlers the cams both turned the same direction. If that's the same setup your running I'm pretty sure a standard cam will work.

[Geoff2]

Isky does a lot of odd ball stuff.

[Truckedup]

Might see if Delta out in the NW will regrind your/a core for you?

Delta Camshafts
Phone: (800) 562-5500
2366 Tacoma AVE S.
Tacoma, WA 98402
sales@deltacam.com

pdq67

I used Oregon Cams for vintage regrinds...http://www.oregoncamshaft.com/

Ozonkiller says

Talk to Laurie at Web cams

Oh boy... It may be just me, but I had a problems with Web and the cams for my vintage dual engine Triumph LSR bike. The final product was fine but they dropped the ball on quality control and three weeks turned into three months ...

[cknight]

Back in the 70's I had a pair of 312 boat engines one standard rotation one reverse rotation. The standard one had a timing chain the reverse one had gear to gear driving the cam no idlers the cams both turned the same direction. If that's the same setup your running I'm pretty sure a standard cam will work.

Although the cam will be turning in the standard direction on the reverse rotation engine with a two-gear drive, the crank layout dictates a different firing order, so the stock cam will not work. The distributor gear would be standard, though. Regards, Chase

[MadBill]

That makes it a little easier if an off the self part is N/A; a full round core could be ground conventionally with pretty well any lobes.

[Walter R. Malik]

Give Steve Demos, Demos' Cams a call he has some lobes that will work well if your core is good.

http://demoscams.com/

706.367.2417

LEN ... About 10 years ago I used "Predator Cams" in PA. to regrind a Poly 318 Mopar cam for me and I was greatly pleased.

Looking through my past build sheets I have their phone numbers but, I don't know if they are still in business.

570 339-2411
570 339-5913

[jred]

just got done doing a 312 ford for a 56 f100 got the cam from jerry at Schneider cams in san Diego he also did a rev rotation ford model 60 cam for me 10 years ago

[Trosky]

Back in the 70's I had a pair of 312 boat engines one standard rotation one reverse rotation. The standard one had a timing chain the reverse one had gear to gear driving the cam no idlers the cams both turned the same direction. If that's the same setup your running I'm pretty sure a standard cam will work.

Although the cam will be turning in the standard direction on the reverse rotation engine with a two-gear drive, the crank layout dictates a different firing order, so the stock cam will not work. The distributor gear would be standard, though. Regards, Chase

I'll have to remind my bbc with a ls firing order that the crank determines firing order.

[wyrmrider]

crank determine the firing order?
not hardly
crankpin can be on either firing or overlap
and two crankpins are at tdc at the same time
crank allows lots of combinations

[MadBill]

There's at least half a dozen potential F.O.s for a standard two plane crank..