SKMFX Engines gets 519 hp stock stroke 360

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I need to go pick that mag up, I love that engine challenge. I've heard that there is a mean 410 in it that had made 750hp in testing through a 750cfm and 1-5/8" headers, so I gotta see what happened when the guy (Dennis at AFD I believe) decided to turn the wick up.
 
You guys have been paying attention. I built the engine in the article, sold the shortblock and still have the top end. W2's especially the closed chamber variants are a great cylinder head, but you have to be comitted to using them as they require W2 specific valves, rockers, intake, headers. I didn't think 519 hp was too bad considering the cam rule (hydraulic lift rule) and intake rule (dual plane). With a single plane I would expect 550-560hp to show up at 6800-7000 rpm. Also be aware that an SAE j1349 correction factor is used at the EMC and most entries suffer huge losses in hp/tq from their home dyno's. On our SF-902 it made a legit 531 hp and 490 ft/lbs in contest form, so we had a good idea what to expect. The real wild card was the RockettBrand 81 octane supplied--:eek:ops: I should start a thread about my EMC 2011 engine--I think that build is far more interesting. J.Rob
 
412 Stroker said:
Newest issue of Popular Hotrodding, has SKMFX Engines (from Canada) built a W2 headed 360 I think it was .040 over 360 block, 519 hp and 476 torque, the builder says he doesn't like strokers as they pound the crap out of the mains, can anyone confirm this?? I had not heard of this, how is this possible, I am new to the stroker stuff, I have heard some getting over 10,000 miles on thier stroker, to me thats seems good life, especailly if you pound on it. the way I drive my car 10,000 miles is like 5+ years as I only get to drive my duster about 2000 miles a year.
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Whoooaaaa....Hold everything...Is that your Grgeous Duster in the picture ? If so, can you Please give me the breakdown on the paint ???
 
rumblefish360 said:
Great advice for any engine!!!!!!!

A lot of people give grief of the side loading, extra stress here and there, this and that. I believe the bottom line is, build it well, treat it right, it'll live a long time.
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Holy old thread Batman!
That member hasn't been here since Nov 27 2019
 
Shaun3406 said:
Whoooaaaa....Hold everything...Is that your Grgeous Duster in the picture ? If so, can you Please give me the breakdown on the paint ???
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This is more like it: Holy old thread Batman!
That member hasn't been here since Nov 27 2019
 
ou812 said:
How does it tie everything together? It attaches all the main studs together....but unless it's part of the cap, or doweled to the caps, it does nothing. And it does not prevent main cap walk!
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I t does tie things together on a big block , and does help cap walk , keeping it from leaking was my problem .
 
autoxcuda said:
I completed my 416 stroker on March 27, 2011. So that's 5 1/2 months.

So far I have 1800 miles on it.

I don't get to drive it much. Mostly 2-3 mile errands on weeknights and weekends. But it's been to two all day track days with lots of laps at 100-130mph reaching 6000-6200 rpm for sustained periods. And I've took it to one autocross event which is just a lot of on and off stuff only like 50 second laps. I cruise at about 3700-4000 rpm at 75+ mph. Drove it on two 90 mile trips in 90-100 deg heat to race it and then drove home.
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Well guys, @autoxcuda is still around. Is there any update on your build and mileage?
:thankyou:
 
Ottmundr said:
Well guys, @autoxcuda is still around. Is there any update on your build and mileage?
:thankyou:
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Turn key.

Drove it on 50 miles cruise last Saturday and another 70 to club meeting on Sunday. I have about 8000-10000 miles on it. About every year I take it out to Willow Springs on the big track.

About 3800 rpm on the highway in the fast lane.
 
dodge freak said:
10,000 miles isn't nothing, I be sick if I knew my engine was good for only 10,000 miles. Come on guys, I got over 4,000 miles on my rebuild 340 I got last summer. Got drive these cars, life is short, people used to drive them year round

Plain and simple, the SMB was not design for a 4 inch stroke crank. Maybe it can work, you would think in the crazy 70--80's if it was easy it would had been done. Supercharging what was in back then

least the guy is honest and says up front 10,000 miles is a normal life of a 4 inch stroke mopar, those pistons have very short skirts, pistons rock and rings lose their seal, 10,000 miles seems about right to me.

W2 heads are the way to go, why isn't eddy making them, IDK. Back in 1979 Hot rod got over 400 hp out of a W2 head 360 but it had only 8.5 to 1 compression. Was a factory fresh short block 360 that they put in the old hemi cam and W2 heads.
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Are these the w2 heads you are talking about..I didn't think mopar was making them any more. I came across them yesterday looking for some small block mopar parts. I have never messed with any of the W head stuff so I want sure.

Free Shipping on Orders Over $99 at Summit Racing
 
Stroker pounds the crap out of the mains, post #30.
Huh?
I can name a couple of 'production' strokers that seem to last just fine. By that I mean they have considerably longer strokes than other engines of comparable capacity. Olds 455 has a 4.25" stroke, 1/2" longer than a 440. 455 Pontiac is right behind it with a 4.21" stroke. Neither engine known for pounding out mains.
 
Bewy said:
Stroker pounds the crap out of the mains, post #30.
Huh?
I can name a couple of 'production' strokers that seem to last just fine. By that I mean they have considerably longer strokes than other engines of comparable capacity. Olds 455 has a 4.25" stroke, 1/2" longer than a 440. 455 Pontiac is right behind it with a 4.21" stroke. Neither engine known for pounding out mains.
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I bet neither engine has such skinney structures between the mains and cam tunnel either!!
 
Bewy said:
Stroker pounds the crap out of the mains, post #30.
Olds 455 has a 4.25" stroke, 1/2" longer than a 440. 455 Pontiac is right behind it with a 4.21" stroke. Neither engine known for pounding out mains.
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Neither engine is known for turning much over 4500RPM either. I just tested a bone stock 1973 455--All done @ 4300rpm. J.Rob
 
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