okay Boys and Girls...
here are the loooooong awaited "impartial" Bulldog flow test
results.
this is a set of heads that was prepped by MM, so im not
sure you could say these were exactly how you'd get them if
they had come from Bulldog themselves, but im sure the numbers would be close.
after i pulled the valves and poked around the ports a little it was obvious i was going to have to flow a left and right intake port, since the final approach from the floor/short turn into the bowl was noticably different between the two(in this case, #1 and #3 cylinder position).
#3 looked/felt like it would be a better port...and it was.

as it turns out.....that difference equates to a fair amount of difference in flow as well.
these heads will only be getting a minor amount of work done to them, so it will also be interesting to see if these two ports get closer to each other after the work
is completed.

the valve seats look like they were probably prepped at MM, since they appear to have been finished using stones.
the intake valves are back cut, and the seats are about .060 wide for the exhaust, and .080 wide for the intakes.

there is some very minor grinding in the bowls and port entrances, but no more than what you get with an out of the box Edelbrock head.
i dont know if this work was done at Bulldog or MM, but in any case its about 5 minutes work per head, tops.

okay...so you probably wanna see some numbers now, huh?

aaaaallllrighty then.......

lift-----#1I/#3I/#1E
.100--67.4/-68.0/55.7
.200-140.0/140.0/101.8
.300-203.7/206.1/141.8
.400-249.9/256.3/175.8
.450-270.7/278.7/187.9
.500-283.6/293.2/196.4
.550-281.2/291.9/204.9
.600-281.2/295.5/207.3
.650-286.6/297.3/208.5
.700-288.4/297.3/208.5

the lastest words that have been thrown around is that these were supposed to be flowing around 20-25+cfm more out of the box than an E head.
while the "big number" isnt 20-25cfm better than an E head, the better of these two ports is about that much better in the .450-.550 lift range.

the next thing to determine is....how well do they respond to some reworking and detailing of the bowls and ports.

COOL!

Beyond flow, what are you other opinions of the heads? Good seats, cuts, surfaces, chamber, spring seats, rocker & shaft geometry, slag, bolt holes, threads, oiling, cooling design, metal chips in every nook and cranny, etc. Qualitative and quantitative observations are both welcome!

Greg

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the valve seats look like they were probably prepped at MM, since they appear to have been finished using stones.

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Fast, what would you have used? and why?

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there is some very minor grinding in the bowls and port entrances, but no more than what you get with an out of the box Edelbrock head.
i dont know if this work was done at Bulldog or MM, but in any case its about 5 minutes work per head, tops.

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How does it compare? Can you get specific? Huge seat ring hangover, bad bowl grinding, crude casting? More info... feed the addiction, man

Thanks Fast; I like the bigger midrange .200 to .500 lift flow numbers. IMHO this really helps since the engine will see most of its lift duration in this range. mike

Don't W2 heads flow more than that? I know those are BB - just saying should a BB require some serious flow?

Well #3 looks pretty good! ~275 at only .450 I'd say looks pretty darn good out of the box. But the exhausts don't look like anything special...yet I'm sure.


What's your gut feeling on the POTENTIAL and is there more meat inthe walls and roof to work with?
How would they compare to the other Street head, the SR?

we eagerly await your next post!!

Yes eargerly. But right now the hype appears to be a little more than the product. But all in all still another Mopar head on the market anyway.

For comparison's sake, here are some #'s off Dwayne's bench for a set of stage1 ported e-heads that he did for me:


lift-----#1I/#3I/#1E.....e-head/stage1
.100--67.4/-68.0/55.7.......71.0/58.8
.200-140.0/140.0/101.8....148.2/111.3
.300-203.7/206.1/141.8....212.2/149.1
.400-249.9/256.3/175.8....257.9/186.7
.450-270.7/278.7/187.9....273.9/200.0
.500-283.6/293.2/196.4....283.6/207.3
.550-281.2/291.9/204.9....291.9/212.2
.600-281.2/295.5/207.3....295.5/217.0
.650-286.6/297.3/208.5....297.3/219.4
.700-288.4/297.3/208.5....300.9/221.9

It'll be interesting to see how well the 'dogs respond to some additional work but out of the box they look to be pretty close to a stage1 PRH prepped E-head. Ron

Interesting.....A buddy of mine just sold his Eddys and is getting the bulldogs.
He had yet to see flow #'s on 'em though......

Thanks!

firefighter, your comparison is pretty fair, out of the box, the heads peak numbers are nearly identical, midrange numbers go to the dog, exhaut numbers are eddy, with probably a similar cost, but the bulldogs have more room for improvement cant wait to hear about a set of these with max wedge ports ... anxiously awaiting the news .... although the difference of 14 cfm between 2 runners @.600 seems pretty scary hopefully they come together like you said ...

Just for comparison sake, here's Ryan's numbers on my 340 Eddy's. Got some real good exhaust numbers, can't get it in if you don't get it out.

.100"--79.4/58.7
.200"--151.8/118.7
.300"--212.2/168.4
.400"--254.6/200.8
.450"--269.1/212.1
.500"--276.0/219.8
.550"--280.1/221.8
.600"--281.6/225.6
.650"--282.9/225.6
.700"--284.7/225.6

Thanks Dwayne!

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I was expecting more out of the 'dogs, especially with all the hype and consider that the intake runner volume is already 25-30 cc bigger.

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Me too

The .250-.450 numbers (and the % rate of rise) are usually (though not always) a pretty good indication of the port efficiency. If the peak is ~290 out of the box, I'd venture to guess they'll go at least 330 at .650 once Dwayne works with them a bit. All else being equal, 10 cfm at .400 lift makes a bigger difference than 15 at .600.

This dropped outa sight too quick.../bump

Awesome Dwayne thanks for the info, as usual you come through where no one has . That solidify's for me that the heads do actually exist .

Pretty impressive off the bat, definitely don't show the peak #'s promissed but that's what I expected. They actually are more then I expected, the mid flow #'s are pretty friggin good. In fact the mid flow #'s hang with/beat my Dwayne-prepped heads . Hey Dwayne wanna make another trade ? Just kidding i'm guarding these with my life, besides I wouldn't want to trade exhaust core shift for intake core shift .

Edit: I just noticed the #'s dip when they hit .550, and on the bad port it even continues in the .600 lift then picks back up, what's up with that?

Can we get a mod to pin it to the top? I feel it's very worthy of it thanks .

thats some great info. i alway's like to see the unbiased stuff from dwayne. after all of the posts like this dwayne has done, i feel like i know his bench, LOL.
i think theres some obvious problems with the ports on those heads. i'm sure it can be corrected, but it just goes to show how good the eddy heads really are in comparison.
i'm not ready just yet to jump on the dawg wagon. i'll reserve final judgement for now, but so far i'm not all that impressed. these heads were being touted as THE answer. it doesn't appear that they live up to the hype just yet. maybe they'll look a lot better on a more forgiving bench, LOL... i'll keep my eddy's for now.