70 383 Magnum a 3 bolt or 1 bolt cam ?

Posted By: Triggerfish

70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/26/11 06:34 PM

Did stock 383 magnums come with 1 bolt or 3 bolt cams? I'm
going to re-cam the 70 383 in my 71 Power Wagon for low end
torque & didn't want to pull the timing cover off to find out.
I've heard the factory installed whatever they had on the line,
so not all hp motors got the 3 bolt cams??

Attached picture 6889508-71pwside.JPG

Posted By: John_Kunkel

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/26/11 06:40 PM

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

Posted By: Triggerfish

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/26/11 06:48 PM

Thanks John & that makes it much simpler. I was considering an Engle
K54 or Hughes ah1928bl. Crane makes Summit Racing's cams & they
have one similar to the Engle for only $54. Any input on these choices?
thanks.

Attached picture 6889529-71pw383mag.JPG

Posted By: Fury Fan

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/26/11 06:53 PM

If you're putting in a new cam, that project should surely include a high-quality timing chain set also, so just make sure they match.

Posted By: Triggerfish

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/26/11 06:57 PM

I'll get a Cloyes double roller & will replace the water pump, too.
Thinking of the Summit cam cause the price is great & they're local,
but really trust Hughes & Engle's mopar grinds.

Posted By: topside

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 04:24 AM

Nice truck!!!

Engle user here, multiple times, very happy with 'em.

Posted By: hemigod426

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 04:33 AM

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

Posted By: SomeCarGuy

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 04:37 AM

If you have an HP, I'm not sure that a cam change is needed. If it all or near stock, then the OEM cam is about right. I had a long conversation w/ Scott Brown a few years back about doing a custom grind for a 383 Bee. The car was #'s matching and I didn't plan on changing much, if anything. I was going to throw in a new chain as it had some slop, figured I'd swap the cam.

His conclusion was that he might get me 10-15 HP at the most and maybe a little more torque, but with the cost, it was hard to justify. He was honest enough to talk me out of handing him any money for that one.

What are your specs? That truck has a lot of weight to get moving. Big cam might hurt it pretty bad.

Posted By: 1_WILD_RT

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 06:58 AM

If your putting a timing chain & gears in it really doesn't matter whats in there now, as long as the cam & gears set matches.... Use what you feel is the better design....

Posted By: Cab_Burge

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 07:07 AM

Quote:

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

I've had several original 426 M.W.,1963 415 HP and 1964 425 HP. no three bolt cams in them from the factory

Posted By: vdriver

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 07:28 AM

Sweet truck!

Posted By: JohnRR

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 02:28 PM

Quote:

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

1970 and 1971 440-6pk would have come with a 3 bolt cam.

Posted By: NachoRT74

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 02:45 PM

Quote:

Quote:

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

1970 and 1971 440-6pk would have come wit ha 3 bolt cam.

and with same specs than the 440 HP I think... right ? only diff from these is the 3 bolts setup

Posted By: JohnRR

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 02:47 PM

Quote:

Quote:

Quote:

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

1970 and 1971 440-6pk would have come wit ha 3 bolt cam.

and with same specs than the 440 HP I think... right ? only diff from these is the 3 bolts setup

No , the 440 4 bbl had lower compression ratio than a 6pk , 9.7 ...

Posted By: NachoRT74

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 03:10 PM

I meant the cam specs, not the engine specs

Posted By: JohnRR

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 03:15 PM

Quote:

I meant the cam specs, not the engine specs

They are supposed to be ....

Posted By: Triggerfish

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 04:08 PM

Thanks Randy & I was thinking of switching, but Summit's cam is only $54 & that's hard to beat & made by Crane, too. But if I ever decide to swap the 383 for my 451, maybe a 3 bolt setup would be a better selling factor if I decide to turn it loose. But being in a truck, I think the one bolt would be fine.
Hope you've been able to enjoy some top down crusin w/ the Chally.

Posted By: DPelletier

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 04:23 PM

Quote:

Quote:

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

1970 and 1971 440-6pk would have come with a 3 bolt cam.

Dave

Posted By: JohnRR

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 05:06 PM

Quote:

Thanks Randy & I was thinking of switching, but Summit's cam is only $54 & that's hard to beat & made by Crane, too. But if I ever decide to swap the 383 for my 451, maybe a 3 bolt setup would be a better selling factor if I decide to turn it loose. But being in a truck, I think the one bolt would be fine.
Hope you've been able to enjoy some top down crusin w/ the Chally.

The number of bolts in the cam has to do with the valve action of the cam.

I really don't think a 1 bolt vs a 3 bolt would be a deal breaker in selling an engine .

Posted By: Triggerfish

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 05:24 PM

Quote:

Quote:

Thanks Randy & I was thinking of switching, but Summit's cam is only $54 & that's hard to beat & made by Crane, too. But if I ever decide to swap the 383 for my 451, maybe a 3 bolt setup would be a better selling factor if I decide to turn it loose. But being in a truck, I think the one bolt would be fine.
Hope you've been able to enjoy some top down crusin w/ the Chally.

The number of bolts in the cam has to do with the valve action of the cam.

I really don't think a 1 bolt vs a 3 bolt would be a deal breaker in selling an engine .

Thanks John. Summit's 6400 cam has a power band of 1500 - 5K, lift @ .050 is 214 int/224 ex & advertised duration of 272/282. Lift is 442/465 & has a 112 centerline. Do you think this would be a good
cam for the truck? (3.55's w/ 35" tires.)

Posted By: 70440+6bbl

Re: 70 383 Magnum a 3 bolt or 1 bolt cam ? - 10/27/11 06:40 PM

Quote:

Quote:

Quote:

No 383 ever came with a 3-bolt cam, the only Wedge to get one was the 440-6.

only 2 motors ive seen with 3 bolt cam gear factory are 426 hemi and 63/64 426 max wedge

1970 and 1971 440-6pk would have come with a 3 bolt cam.

Yup.