Yet AGAIN more W2 360 talk

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gagembassett said:
Well people talking about the 4 speed and weight made me reevaluate the rear end. I don't have anything against running a Dana 60 so might as well and play it safe. As for the W9s I figured those are the cream of the crop for W series heads so having those with the small chamber and a flat top piston vs. an open chamber w2 with domed pistons would help me get both the 12.5:1 or 13:1 I want and would greatly reduce piston weight which meant better for the 7,000 rpm. :thumbsup:
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The issue you will have with any SBM is crank weight. My billet 3.79 crank weighs 63#'s. Stock 3.31 crank is 57#'s as I recall. The typical SBC dirt racer can get a a 39# crank...makes a ton of difference.

I tried to get a lighter crank built... talked to SCAT, Windberg and Bryant. Lightest they build is over 50#'s. Six month wait. And several thousand dollars.

I'd spend my money elsewhere.

BTW I have a 13.5-1, 388" 360 with W2 heads running on moonshine. Crower billet rods. RaceTec pistons. The next build will be a 340 +.060 with a 3.79 crank, Brodix B1BA-MC heads.
 
W-7-8-9, KA-CHING!
Big power, port & flow numbers are possible!
CFM - 380+
Give me a Rick Flare,
Woooooooooooooooooooooooo!!!!!!!!
 
Krooser said:
The issue you will have with any SBM is crank weight. My billet 3.79 crank weighs 63#'s. Stock 3.31 crank is 57#'s as I recall. The typical SBC dirt racer can get a a 39# crank...makes a ton of difference.

I tried to get a lighter crank built... talked to SCAT, Windberg and Bryant. Lightest they build is over 50#'s. Six month wait. And several thousand dollars.

I'd spend my money elsewhere.

BTW I have a 13.5-1, 388" 360 with W2 heads running on moonshine. Crower billet rods. RaceTec pistons. The next build will be a 340 +.060 with a 3.79 crank, Brodix B1BA-MC heads.
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I'm not overly terrified about the crank weight for 7,000 rpm on the 3.58 stroke. I feel pretty confident that everything will be happy there for a higher compression ratio plus the rpm level. I'm planning on going with a Bryant crank and K1 H-beam rods
 
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Krooser said:
On a typical Saturday night 18 out of 20 dirt late models at the track I' m at run moonshine.

We were just quoted $1.80 per gallon for this season...race gas has got to be nearing $10/ gallon right now.

We will use about 15 gallons per night...practice, 10 lap heats and a 20 lap feature on a paperclip 1/2 mile.

We adjust the chassis for fuel burn off...
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out of curiosity, what is the octance rating of your moonshine? Is it a substitute you use for methanol?
 
gagembassett said:
So after some thought on it, the 8 3/4 is out in favor of a Dana 60. I'm trying to figure out if making a 5x4.5 bolt pattern full floater Dana 60 is even possible. And the W2 heads are out in favor of a W9 set up now as well. Changes and more changes :lol:
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I thought trucks went to the 5x5.5" lug pattern in 1981...?

For the Dana, check with the hardcore Jeep guys. Pretty sure some of them run 5-lug D60 in the back of a CJ or Wrangler.

You should also seriously consider a built 9.25", especially in a pickup. (Heck...it was probably built with one.) Maybe 95% as strong as a Dana, but much less cost and lighter. If you need a core to build, they're still abundant in junkyards, everything from Dakotas to 1-ton vans.
 
gagembassett said:
Well people talking about the 4 speed and weight made me reevaluate the rear end. I don't have anything against running a Dana 60 so might as well and play it safe. As for the W9s I figured those are the cream of the crop for W series heads so having those with the small chamber and a flat top piston vs. an open chamber w2 with domed pistons would help me get both the 12.5:1 or 13:1 I want and would greatly reduce piston weight which meant better for the 7,000 rpm. :thumbsup:
Click to expand...

I have to admit...600hp and 7000RPM (even without the stroker crank) on ANY stock LA block (even a TA) would terrify me. With a 3.79" stroke, that's over 4400fpm...that is NASCAR piston speeds, on a production 360 block. I'd spend the money on an R block before a pair of W9 heads.

Dodge R5 P7 r5p7 mopar bare engine block new or used bushed nascar motors 358 | eBay
 
Jarlaxle said:
I have to admit...600hp and 7000RPM (even without the stroker crank) on ANY stock LA block (even a TA) would terrify me. With a 3.79" stroke, that's over 4400fpm...that is NASCAR piston speeds, on a production 360 block. I'd spend the money on an R block before a pair of W9 heads.

Dodge R5 P7 r5p7 mopar bare engine block new or used bushed nascar motors 358 | eBay
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Switched back to a stock 3.58" stroke. Not sure what those pistons' speeds would be without breaking out the math book. I feel confident about it as I've seen and talked with a few guys that have run 340s with stock stroke and old heavy TRW slugs up to 8,500+ rpm. Nonetheless I completely understand your point. I have thought about an R block. If I do stay with the factory block it will be very well prepared by a professional.
 
gagembassett said:
Switched back to a stock 3.58" stroke. Not sure what those pistons' speeds would be without breaking out the math book. I feel confident about it as I've seen and talked with a few guys that have run 340s with stock stroke and old heavy TRW slugs up to 8,500+ rpm. Nonetheless I completely understand your point. I have thought about an R block. If I do stay with the factory block it will be very well prepared by a professional.
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Forged steel crank?
 
Jarlaxle said:
I have to admit...600hp and 7000RPM (even without the stroker crank) on ANY stock LA block (even a TA) would terrify me. With a 3.79" stroke, that's over 4400fpm...that is NASCAR piston speeds, on a production 360 block. I'd spend the money on an R block before a pair of W9 heads.

Dodge R5 P7 r5p7 mopar bare engine block new or used bushed nascar motors 358 | eBay
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Well I kinda agree especially on an endurance application like mine. The hot ticket would be big bore/ short stroke but the only block that comes close is an overbored 340 unless you have a race block.

I am not a big fan of these 408+ engines especially with heads that can't supply enough air. I would want at least 330+ cfm on my race motor if I went that big.

My son used to maintain a friends large muscle car collection. I drove one of the 408/4speed Darts in the collection... Not impressed. Just my opinion.
 
Krooser said:
Well I kinda agree especially on an endurance application like mine. The hot ticket would be big bore/ short stroke but the only block that comes close is an overbored 340 unless you have a race block.

I am not a big fan of these 408+ engines especially with heads that can't supply enough air. I would want at least 330+ cfm on my race motor if I went that big.

My son used to maintain a friends large muscle car collection. I drove one of the 408/4speed Darts in the collection... Not impressed. Just my opinion.
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Heads are always the key on s stroker.
 
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