800hp with W5s ?????

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??? buddy has a 392ci W5 headed SB w/ a turbo that makes about 1000. Ran his chassis TC3 on a test run (easing into it and feathering it) to a 9.19 @174. Has run 8.60's w/ only 9lbs of boost. don't know if he's made a full pass yet.

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Whats the max cfm outa a set of W5s & the largest CSA? judging from the large port M1 someone was thinking big.

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So is 345 cfm it

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I think leaving a 14mm spark plug out is worth 12 cfm.

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So Vic....What else have you learned in the secret W5 project

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I've learned this..........(or decided)

When I'm done using OEM heads on my engines, I'll step past the W-5 heads.

I've sold nearly everything W-5 related. (except a nice pair of TTI A-body polished, ceramic headers.)

No secret W-5 R&D here. That picture was a MCH CNC W-5.

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That's what I was afraid of I thought you would squeeze some more outa 5s once you started playing around, but I see your point

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Not even anywhere near close.

My old " typical build" 422 W5 motor went 9.85 at 3400 pounds. That was on leafs and a very crude low buck suspension, so no help Et wise with anything exotic suspension wise. Take 700 pounds off that and ypou are what..9 teens??????

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I will call BS on that one.
We don't race dynoes or hypothetical situations. In a perfect world you "might" have run those #'s but I HIGHLY doubt it. There is a lot more to tuning a combo then just subtracting weight. For example, my overachieving 555ci runs high 5.2x at 2850#. It only ran .13-.15 faster at 2400#. So your theory is bogus there. 100# = .1 does not always work. It just takes more effort in a sub 10sec car.
Your combo ran good for what it was, but like you said just a "typical build"

As you know I have a dyno sheet from a w5 built from 15 years ago that shows 741hp. I have no reason to believe it was not accurate. That motor went .99x 60' in a 23 Tbucket before I bought it. It was hurt multiple times and had cam swap. It ran a best of 9.08 @ 149 @ 2650# with a burned up pg and questionable convertor.
IIRC that showed 699hp on Wallace calculator which is only atool as it can not take into account all of the variables. No way to measure but I would guess at least 20-25% parasitic loss. Do the math...

All that said, I do believe the right builder could come close to 800hp in a max effort W5 build.

but who would want to??

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I think leaving a 14mm spark plug out is worth 12 cfm.

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This may be fuzzy memories on my part, but didn't Ritter-Webber run W5's 20yrs ago in Comp.

Seems like back then their Daytona ran 7.70's or so?

Dont know HP required to do that, but it had to be making some steam......

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I've learned this..........(or decided)

When I'm done using OEM heads on my engines, I'll step past the W-5 heads.

I've sold nearly everything W-5 related. (except a nice pair of TTI A-body polished, ceramic headers.)

No secret W-5 R&D here. That picture was a MCH CNC W-5.

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so there will be a real crazy W7 or better headed stock stroke 340 out there in the future?

back on topic: im not an expert but 800sounds like a stretch with W5s could be possible,but doubt it will ever be dupplicated.

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sorry if my post was unclear.
I never doubted your car ran high 9's. What I doubt is that it would run anything close to a low 9 with weight reduction alone.
Let's stick with FACTS, ie first hand knowledge, not hypothetical BS and I know someone who...........yadayada

Back on topic so what is max hp of a w5 motor??
Using B3 math a "typical" build made 650? and barry has 677hp. I don't believe either are max effort but I know little about barryc's.
Now let's add
billet crank
max ported big valve w5's
sheetmetal intake,
drysump oiling,
big roller cam,
mechanical fuel injection
custom built headers
and a few other tricks.
What'ya got now??

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Love ya Wayne

Well, the billet crank isnt going to make it notably any faster,i had max effort heads( Ryan did them and i suspect they were about as good as any around he has done or others have), so little if anything there maybe a bigger than 2.08 valve might yield something, but probably not much.For sure gotta think the fuel injection would be worth a couple of tenths, and i dont doubt a good set of headers might be worth a tenth.
I ran a 700 lift roller that might could have been a little bigger( 273@50) so might be a little power there. Unsure about the intake and drysump, i plain dont know.
At the end of the day its actually a pretty small head to support 400+ inches of anything

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my point is you add those kinds of parts to a typical build I'd bet + - 100hp

is that 345cfm # that was thrown out anywhere near accurate??
If so 800hp should be within range. It is apples to orange comparison because BBC heads are superior by design. My 555ci has cnc 355 heads and is close to 1000hp. Obviously much larger ci then any w5.

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Flow benches are like the dyno's we were talking about.

My old heads( that i am aware of) were on two different benches, one they peaked at 297 if i recall, the other in the 330's. I know of another set of w5 heads that are extremely well done( as good, if not a hair better than the ones i ran) that barely got over 300 on a third and different bench again. So, who knows, two sets of well done w5 heads on 3 different benches went a little over 300, a little under 300, and in the 330's as i recall. At the end of the day we end up back at weight, MPH, and ET at the dragstrip.

If i had a pair of heads that went 370 and produced 10 teens in the 1/4 mile, and another pair that went 9.80's on top of the same motor, and went 297, i am thinking the heads that went 297 must be better than the pooches that went 10 teens


On that note i am going home, we had our first ever 4 car day at the store, and i am thinkin Jack and Coke and the couch

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Until someone attempts a high rpm, sheetmetal, 2 x 4, dry sump, latest-greatest ring stack, dedicated piston design, full blown cylinder head with the proper MCSA to support the desired ci and a build specific camshaft profile, valvetrain, etc..........we will never know.

I would bet it could be done with enough loot.

Thing is, an old 15* roundy-round W8, w/a cast single and a 4150, wet sump will make 800+ by accident @400+ci, so why would anyone go through the trouble with a W5???

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and i think if all the employed members on this site chipped in 100 bucks a pc,we can build that motor,and i will gladly let u use my car to t&t

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Until someone attempts a high rpm, sheetmetal, 2 x 4, dry sump, latest-greatest ring stack, dedicated piston design, full blown cylinder head with the proper MCSA to support the desired ci and a build specific camshaft profile, valvetrain, etc..........we will never know.

I would bet it could be done with enough loot.

Thing is, an old 15* roundy-round W8, w/a cast single and a 4150, wet sump will make 800+ by accident @400+ci, so why would anyone go through the trouble with a W5???

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Until someone attempts a high rpm, sheetmetal, 2 x 4, dry sump, latest-greatest ring stack, dedicated piston design, full blown cylinder head with the proper MCSA to support the desired ci and a build specific camshaft profile, valvetrain, etc..........we will never know.

I would bet it could be done with enough loot.

Thing is, an old 15* roundy-round W8, w/a cast single and a 4150, wet sump will make 800+ by accident @400+ci, so why would anyone go through the trouble with a W5???

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I think pretty much sums up my feelings. I would have to ask why bother when thier are better head choices out there in the first place
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I will answer this question myself. Because it is winter and what else are y'all gonna talk about to pass the rime

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w5 w8 w9 ALL I KNOW IS RICHIE KAY OR VALIANT RICH HAD THE BADDEST N/A SB AROUND I DO believe arrington heads!! o yea and he's a ny boy woooooooo hoooooooo!8.60"S @ 3000+ lbs n/a

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maybe it's me,but i like when someone compliments my car,and says big block and i say NOPE,theres something pretty cool if u can say i have the baddest w5,like bondo bob if he gets that tiny motor to make that power he will be the talk of mopar men across the good old U S of A

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I don't say much to them .BUT LOOK

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is it even possible to make 800hp with W5s?? I myself don't think so even if they have the Dick Landy name on them. really is it possible

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Why even try. Look at the EMC series small bore 4.25 stroke, production block and heads.700 HP with a hydraulic cam on shell 85 fuel. Try that with a W5.
Outdated technology Matt
Now imagine what could be accomplished if Dodge gave a quarter of the effort that GM put in their LS program.