ValiantRacing
Well-Known Member
Who makes the pan?
Making a little progress on the W5 engine for the Dakota
- Thread starter tvt59
- Start date
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Making progress. Plumbed vacuum pump, oil system, engine is oiling. Got to wire up the EFI and Ignition system. Hopefully dyno in a couple of weeks. Going to put two maps in it. One for race gas and one for alcohol.
Dyno'd the engine today. Any guesses on HP and torque? 441" 4.190 bore 4" stroke. W5 heads, Larry Smith ported, Brett Miller put 2.125 intake valves and 1.56 exhaust, Mopar M1 intake unported, 15 to 1 compression. 1.7 T&D rockers. On race gas. Solid roller cam.
View attachment 1716354735
View attachment 1716354735
900hp and 645tq
B3422w5
Well-Known Member
722/605
PRH
Well-Known Member
Was it tested with the EFI or a carb?
W5 stuff is out of my wheelhouse……. But looking at the combo, the unported manifold seems like it would be the cork.
W5 stuff is out of my wheelhouse……. But looking at the combo, the unported manifold seems like it would be the cork.
We just started it with a carb on race gas. The carb was a little fat. And the valve covers are leaking vacuum. Didn't want to spend too much time turning the carb. Since we're going to run it on EFI and alcohol. And we stopped at 7400 it may rev a little more. But these are the numbers so far.
PRH
Well-Known Member
Impressive!!
wonder what she would do with the intake ported ?
I really don't know. Ryan Johnson told me years ago that the large port W5 intake was too big. We think that if we seal up the vacuum leak and get the tune right on it. It's possible that it might make another 25 hp and 10 more torque.
PRH
Well-Known Member
Will the EFI and alky combo be run on the dyno?
On my particular W5 w/the same intake, the ports are a dead match. Not that the rest could t use some work for more power.
Note; One of the heads gave up early in porting, epoxy was used in a single port. Brett told me the rest was to thin to chance, this was it for that head and the other was ported equally.
WOW! Sweet!
Yes sir. He's got a Chevy wiring harness and some LS coils that he's going try to adapt. He dosen't want to make up my harness so that we can make it fit my Dakota. Going to use my ECU and sensors. Hopefully sometime next week
My W5'S are the first generation. Zero porosity. And very mild core shift.
Ohhh I was kinda close, another 600 rpm please!
I kind of had the rpms, but underestimate the lbs-ft per cid.
He thinks that it'll make peak hp at about 7800 rpm. The experiment that he did with the intake and exhaust valves really paid off. The heads flowed 327 at 600 lift with the stock 2.02 intake valves. With the 2.125 ti valves they flowed a little over 350 at 600 lift. He also spec'ed the cam for alcohol. He really didn't think that it would work very well with gasoline.
Like I’ve said for decades, that head should still be made.
I’d fix two things.
I’d fill in the valve spring pockets .200ish so I could raise the port about the same and not break into the valve spring pocket.
And I’d change the valve spacing so a 2.185 and a 1.550 exhaust valve would fit.
A third thing is I’d move the spark plug a bit so the intake valve seat doesn’t get into the spark plug threads.
I love it when the poopoo crowd claims those heads won’t make any power. That’s just ignorant nonsense.
Nice build!! I can’t wait to see the final results. Hopefully you get it sealed up. I can see at least that much more gain when you do.
Did you ever post your cam specs?? If you haven’t would you mind posting them??
And your compression ratio, rod length, bore and stroke?? I’d like to run your engine through my cam math for some giggles.
100%! ^^^^^
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