Moparts
Get yer Bulldog flow numbers here......
Posted By: fast68plymouth
Get yer Bulldog flow numbers here...... - 02/03/04 02:04 AM
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.
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/03/04 02:06 AM
COOL!
Posted By: Dartman75
Re: Get yer Bulldog flow numbers here...... - 02/03/04 02:24 AM
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
Posted By: CRE2004
Re: Get yer Bulldog flow numbers here...... - 02/03/04 02:34 AM
Quote:
the valve seats look like they were probably prepped at MM, since they appear to have been finished using stones.
Fast, what would you have used? and why?
Quote:
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.
How does it compare? Can you get specific? Huge seat ring hangover, bad bowl grinding, crude casting? More info... feed the addiction, man 
Posted By: Sport440
Re: Get yer Bulldog flow numbers here...... - 02/03/04 03:21 AM
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
Posted By: 71TA
Re: Get yer Bulldog flow numbers here...... - 02/03/04 03:27 AM
Don't W2 heads flow more than that? I know those are BB - just saying should a BB require some serious flow?
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/03/04 03:47 AM
Quote:
Don't W2 heads flow more than that? I know those are BB - just saying should a BB require some serious flow?
You can get 300cfm out of a W-2 with some heavy port work. Once these are leaned on, theyll probably approach 330.. Also, these are true stock replacement heads so you cant expect race like numbers..
Posted By: Streetwize
Re: Get yer Bulldog flow numbers here...... - 02/03/04 03:47 AM
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!!
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/03/04 04:07 AM
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.
Posted By: firefighter3931
Re: Get yer Bulldog flow numbers here...... - 02/03/04 04:28 AM
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
Posted By: beeper71
Re: Get yer Bulldog flow numbers here...... - 02/03/04 04:37 AM
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!
Posted By: topfueldart
Re: Get yer Bulldog flow numbers here...... - 02/03/04 07:11 AM
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 ...
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/03/04 07:22 AM
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
Posted By: firefighter3931
Re: Get yer Bulldog flow numbers here...... - 02/03/04 12:42 PM
Quote:
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 ...
TFD, i actually have about $400 less in the stage1 e-heads. 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. Opening up the runner to a max wedge sized window would affect velocity and throttle response on a smallish (440-451) type street motor i would assume ? I suppose it depends on the application and intended use......
Posted By: ZIPPY
Re: Get yer Bulldog flow numbers here...... - 02/03/04 03:08 PM
Thanks Dwayne!
Quote:
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.
Me too 
Posted By: Streetwize
Re: Get yer Bulldog flow numbers here...... - 02/03/04 04:16 PM
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.
Posted By: 11secondC
Re: Get yer Bulldog flow numbers here...... - 02/04/04 01:28 AM
This dropped outa sight too quick.../bump
Posted By: CokeBottleKid
Re: Get yer Bulldog flow numbers here...... - 02/04/04 01:52 AM
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?
Posted By: CokeBottleKid
Re: Get yer Bulldog flow numbers here...... - 02/04/04 02:35 AM
Can we get a mod to pin it to the top? I feel it's very worthy of it
thanks
.
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/04/04 03:01 AM
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.
Posted By: 440Jim
Re: Get yer Bulldog flow numbers here...... - 02/04/04 03:17 AM
Quote:
out of the box they look to be pretty close to a stage1 PRH prepped E-head. Ron
And these Bulldogs were prepped by MM (back cut, etc) so they are not out-of-the-box. I wonder if MM is doing that to the first few heads to make them seem better than they are. Then they can sell more if the image is better. And stage 1 E-head is cheaper! I say E-head 1, Bulldog nothing.
The comparison to an E-head is fine, but really they should be compared to the Indy SR.
Thanks to Dwayne for making time to flow these and post the results. I am sure he has other customer's heads waiting to get worked on.
Posted By: BradH
Re: Get yer Bulldog flow numbers here...... *DELETED* - 02/04/04 03:27 AM
Post deleted by Brad_Hawk
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/04/04 03:02 PM
soooooooooooooo, im getting ready to tweek the exhaust port a little....and after i removed about .020-.030 of material off the floor near the port exit.....i created a hole
i called MM, and they are sending a call tag to have the head picked up and either they or Bulldog will evaluate the casting to see what gives.
as for these heads being true "out of the box" since they came from MM, i would have to say they should be considered as such since there wasnt any type of "modifications" done to them other than perhaps a back cut to the intake valve....and the valves may come from the supplier that way.
i did go and do a basic clean up of the intake bowl for #1, since that port was down on flow(i'll post the numbers later), but it looks like it will take a bit of work to get the weaker ports into the 305-310cfm range.
not as much as an E head, but probably more than an SR.
i'll have to go through my notes to see if i can find some numbers for an SR with only a bowl blend to see how the mid-lift numbers compare.
at this point(which granted is very early on in the Bulldog testing) i still feel the best port design for the application these heads are targeting is...believe it or not...the original stage VI.
if that head were manufactured with the quality of an E head....that would be a very good product.
Posted By: CRE2004
Re: Get yer Bulldog flow numbers here...... - 02/04/04 04:21 PM
Quote:
Poster: fast68plymouth
Subject: Re: Get yer Bulldog flow numbers here......
soooooooooooooo, im getting ready to tweek the exhaust port a little....and after i removed about .020-.030 of material off the floor near the port exit.....i created a hole
Do you think that's a flaw of the core design or just a casting defect??
Quote:
i did go and do a basic clean up of the intake bowl for #1, since that port was down on flow(i'll post the numbers later), but it looks like it will take a bit of work to get the weaker ports into the 305-310cfm range.
not as much as an E head, but probably more than an SR.
This is really disappointing.... these heads were touted as having 400 cfm capability... 
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/04/04 05:11 PM
Quote:
This is really disappointing.... these heads were touted as having 400 cfm capability...
There is a lot of misconception out there about the Bulldog heads. They are designed as a street replacement head. The idea was to have them flow better than the Edelbrock out of the box with potential for porting to go somewhere in the 350 range. 400 CFM is more than a little unrealistic for a bolt on street style head. You are in original B1 territory there, with 310CC runners, B1 specific intake manifold and rockers. Obviously there are some issues yet to be worked out, but I feel the potential is still good.
Scott
Posted By: 440Jim
Re: Get yer Bulldog flow numbers here...... - 02/04/04 05:39 PM
Quote:
i called MM, and they are sending a call tag to have the head picked up and either they or Bulldog will evaluate the casting to see what gives.
You are taking that extra step. Some vendors would just call the customer that supplied the head and tell them to deal with it. Outstanding.
I think these will be a good head. The application and cost will dictate which of the available heads is right for each customer.
Scott, do you know if they come with the back cut valve? Have any been delivered to you for sale?
Posted By: Molloy
Re: Get yer Bulldog flow numbers here...... - 02/04/04 05:44 PM
Hopefully there will be a bunch of cheap, barely used E-heads and SR's floating around if folks start switching over to Bulldogs!
Posted By: CokeBottleKid
Re: Get yer Bulldog flow numbers here...... - 02/04/04 05:53 PM
Quote:
oooooooooooooo, im getting ready to tweek the exhaust port a little....and after i removed about .020-.030 of material off the floor near the port exit.....i created a hole
Ouch!!!!! That's a bummer, good thing the heads were to be ported, I don't imagine a .030 wall of material would have lasted long on the running motor . Was the spot already worked by MM or was it a bare casting spot?
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/04/04 07:05 PM
Quote:
Do you think that's a flaw of the core design or just a casting defect??
im not really sure.
i suppose it could be either, which is why MM wants the head back to what the deal is.
its just teething pains for a new product, and im sure it will get worked out.
my estimation of these heads, or this head design is....its a more user friendly SR head.
no external oil lines or special headers required, or valley tray spacers/special valley cover.
im waiting to proceed on the second head until i hear back from either MM or Bulldog as to whether that head was thin under all the exhaust ports, or just that one port.
IMO, that head should be sectioned and analyzed to see if it was a casting flaw or core problem.
CBK, i broke through right about where the CNC'd port opening meets the as cast floor.
i was just going to blend in the edges and bowl, and then retest that port.
as soon as i got the carbide in that area of the port, it dimpled in, and i knew it was thin.
i poked it with my pocket knife and a piece about a 1/4" around fell out.
i will say that while Eric at MM certainly wasnt happy to hear there was a hole in the head, he was more than willing to get the head back there so they could check it out.
im sure there will be numerous people running these heads with good success this summer at tracks all over the country....just like all the other aftermarket BB heads out there.
im also looking forward to seeing how they perform the first time i get to try them on the dyno.
Posted By: moparlulu
Re: Get yer Bulldog flow numbers here...... - 02/05/04 06:38 AM
removed about .020-.030 of material off the floor near the port exit.....i created a hole
Well hell... That just BURST my Bulldog bubble!
Posted By: GomangoCuda
Re: Get yer Bulldog flow numbers here...... - 02/05/04 10:14 AM
Quote:
soooooooooooooo, im getting ready to tweek the exhaust port a little....and after i removed about .020-.030 of material off the floor near the port exit.....i created a hole
Could core shift account for both the thin ex. port and the uneven flow of the intake ports? Hopefully its just a bad casting.
Martin
Posted By: Dap
Re: Get yer Bulldog flow numbers here...... - 02/06/04 03:07 AM
Yes this rather disapointing
but like Dwayne said it`s teething pains with a new product.I was in contact with MM today and mike said they will make sure it gets sorted out.
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/06/04 03:08 AM
well...obviously because of the thin spot in the exhaust port it wasnt a "good" casting.
however, it just seemed like the shape of the core plugs for the left and right intake ports are different between the two, which is where i think the difference in flow came from.
i figured i'd post some out of the box #'s for the SR's to compare with:
lift----in/ex
.100--66.8/58.2
.200-131.7/105.4
.300-189.0/146.2
.400-238.0/175.6
.500-273.7/192.6
.550-284.9/198.6
.600-289.7/202.3
.650-291.3/205.9
.700-292.9/208.3
heres the BD numbers again:
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
as you can see, even the weaker of the two intake ports is showing a nice gain in the mid-lifts compared to the SR.
the intake port short turn is shaped very much the same as a stage VI head(which also has good mid-lift numbers).
ive always found the SR intake short turn to be a bit of a challenge to get "right", and im hoping these new heads prove to be a little more "porter friendly"
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/06/04 03:30 AM
"porter friendly"
nice play on words, LOL.
the mid lifts do look good, i hope theyget the casting issues taken care of though. those heads would be pretty worthless if you can't port them. a little tweak here and a little tweak there, here a tweak, there a tweak, everywhere a tweak tweak...
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/06/04 03:41 AM
oh...i almost forgot.
i did do a minor bowl clean up and blended the short turn for the #1 cylinder before the head was picked up to go back to MM.
i also narrowed the valve seat to about .045.
there is still a little turbulence up top, but i didnt really attack the short turn yet.
lift---#1I
.100--68.5
.200-140.9
.300-203.7
.400-253.1
.450-273.9
.500-288.4
.550-299.1
.600-293.7
.650-297.3
.700-299.1
Posted By: 440Jim
Re: Get yer Bulldog flow numbers here...... - 02/06/04 04:05 AM
It looks like Bulldog beat the Indy SR out-of-the-box.
Bulldog 1, Indy SR nothing
That work on the #1 put it close to the #3 (good port). That was good news. Now do you think the #3 would have picked up with the same work? When the "holed" casting gets sorted out and you get back to the "mild" porting, we can see if a ported Bulldog compares to a ported SR.
Posted By: 440Jim
Re: Get yer Bulldog flow numbers here...... - 02/08/04 01:25 AM
And I hear Dap (owner of those dogs), is stepping up the porting to level 2. That will give us a little better picture of the porting potential.
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/08/04 01:47 AM
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/08/04 01:52 AM
Posted By: topfueldart
Re: Get yer Bulldog flow numbers here...... - 02/08/04 02:39 AM
Quote:
Isn't the fact that they sent them to you a modification? How bad were the ones they didn't want anyone to see until they were "fixed"?
Only fair test is a casting taken at random from stock.
They werent sent to dwayne, dap is the owner and he sent them directly to dwayne to have some work done and see there potential ...
Posted By: Dap
Re: Get yer Bulldog flow numbers here...... - 02/08/04 03:19 AM
When the heads were ordered all that was done was a valve job. I then sent them to Dwayne for some R & D to shed some light on these heads and see what they are capable of for all of us to see. Dwayne will be doing the work on the heads and he is also going to build and dyno the engine.I wonder what those numbers are going to be?
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/08/04 03:56 PM
there seems to be a bit of confusion about these particular BD heads.
these heads were bought from MM by Dap, as a retail customer.
MM didnt know they were going to be shipped to me, or that they were going to get flow tested or scruntinized.
they were delivered to Dap(and then to me) in a "ready to run" condition.
my guess is that MOST of the BD heads that get sold, will be prepped by the retailer...not Bulldog.
Posted By: dartman366
Re: Get yer Bulldog flow numbers here...... - 02/08/04 04:54 PM
Im' pretty new to this web site, but I have been reading alot of the threads on various things, and one of the most interesting things so far are about these bulldog heads, I am in the process of stepping up from my smallblock,J headed, 76 dart to a 89 daytona full chassis car, with of course a 400/496 stroker(one small step for mankind,one humongous leap for me!!!) and one of the biggest questions was, my pick of heads.Indys are out because of budget constraints, E-heads were the logical choice because most anyone that I talked to had good sucess with them, now comes the bulldogs and the only thing that I know about them is what I have read here. In your opinion would you think that I would still be better off starting with the E-heads and later progressing to the bulldogs once the bugs and gremlins are sorted out? plus seeing what you have come up with on flow numbers will give my engine guy somthing to work with, thanx
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/08/04 05:37 PM
Quote:
Im' pretty new to this web site, but I have been reading alot of the threads on various things, and one of the most interesting things so far are about these bulldog heads, I am in the process of stepping up from my smallblock,J headed, 76 dart to a 89 daytona full chassis car, with of course a 400/496 stroker(one small step for mankind,one humongous leap for me!!!) and one of the biggest questions was, my pick of heads.Indys are out because of budget constraints, E-heads were the logical choice because most anyone that I talked to had good sucess with them, now comes the bulldogs and the only thing that I know about them is what I have read here. In your opinion would you think that I would still be better off starting with the E-heads and later progressing to the bulldogs once the bugs and gremlins are sorted out? plus seeing what you have come up with on flow numbers will give my engine guy somthing to work with, thanx
I too am cosidering picking these heads up. I have a 493 RB stroker motor with the Edelbrock heads. Personally I am going to wait and see if and when these bugs will be worked out. I dont want to take a set to my machinest and spend the money to find out that the head couldnt be ported correctly without making holes. Once they get this situation ironed out and Fast posts the Level 2 porting flow numbers it will be real interesting to see what these things can do. I will wait until a couple of members have good success with them before I spend my coin. I want to see how they fit as well.
Posted By: ccdave
Re: Get yer Bulldog flow numbers here...... - 02/08/04 05:49 PM
Great info on the new head Dwayne. I would like to see the new head with thread inserts like the Ed heads have. Do you think they will bother?
Posted By: racealittle
Re: Get yer Bulldog flow numbers here...... - 02/08/04 11:28 PM
Fast, are there any interesting pics to post yet?
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/09/04 02:48 PM
Quote:
Fast, are there any interesting pics to post yet?
i'm in a holding pattern on the second head until i hear what MM or BD finds out about the casting flaw on the head i sent back.
Posted By: jyrki
Re: Get yer Bulldog flow numbers here...... - 02/10/04 12:58 PM
So far the only price I have seen is the Hughes's 1850$ for the assembled pair. The Indy SR's are about 1800$ pair assembled. The Indys need longer pushrods, head bolts, oiling kit and valley cover. What do the Bulldogs need? Longer pushrods propablty because of the longer valves? How about the head bolts, can you use the factory ones with hardened washers? How about the exhaust flange location compared to factory iron heads? Is it higher? More outwards? Need for custom headers? I think the price is pretty close to that of the SR's, so that wouldn't lead my decision in which one to choose.
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/15/04 05:57 AM
Quote:
soooooooooooooo, im getting ready to tweek the exhaust port a little....and after i removed about .020-.030 of material off the floor near the port exit.....i created a hole
i called MM, and they are sending a call tag to have the head picked up and either they or Bulldog will evaluate the casting to see what gives.
as for these heads being true "out of the box" since they came from MM, i would have to say they should be considered as such since there wasnt any type of "modifications" done to them other than perhaps a back cut to the intake valve....and the valves may come from the supplier that way.
i did go and do a basic clean up of the intake bowl for #1, since that port was down on flow(i'll post the numbers later), but it looks like it will take a bit of work to get the weaker ports into the 305-310cfm range.
not as much as an E head, but probably more than an SR.
i'll have to go through my notes to see if i can find some numbers for an SR with only a bowl blend to see how the mid-lift numbers compare.
at this point(which granted is very early on in the Bulldog testing) i still feel the best port design for the application these heads are targeting is...believe it or not...the original stage VI.
if that head were manufactured with the quality of an E head....that would be a very good product.
I spoke with someone about this. He wanted to know "if mopars lack a port floor then why are you grinding the floor away?" Can anyone elaborate further on this question?
Posted By: CokeBottleKid
Re: Get yer Bulldog flow numbers here...... - 02/15/04 06:19 AM
ummm he didn't read the post correctly then, MOPARs don't lack a floor, the head was a bad casting and the floor was too thing.
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/15/04 06:25 AM
Quote:
ummm he didn't read the post correctly then, MOPARs don't lack a floor, the head was a bad casting and the floor was too thing.
Thanks, I will bring this detail to his attention.
Posted By: Anonymous
Re: Get yer Bulldog flow numbers here...... - 02/16/04 12:59 AM
Quote:
Quote:
ummm he didn't read the post correctly then, MOPARs don't lack a floor, the head was a bad casting and the floor was too thing.
Thanks, I will bring this detail to his attention.
It wasn't misread
The hole is in the exhaust port floor. All of the high flow heads either raise the port or add material to the floor for more short turn radius. Why would someone cut into the floor for more flow when having more floor adds flow
Posted By: 440Jim
Re: Get yer Bulldog flow numbers here...... - 02/16/04 03:48 AM
The way I read the post, he was just blending back the opening to match the floor. i.e. the bump between the as cast floor and the opening.
Posted By: CokeBottleKid
Re: Get yer Bulldog flow numbers here...... - 02/16/04 09:56 AM
While he's somewhat right that statement is too broad to apply to every port, many times you have to drop the short turn down to get the numbers where you want them. And like Jim said he wasn't even doing that, he was just blending the CNC'd entry.
First he said mopars lack floor, now he's saying Dwayne doesn't know what he's doing? I think your buddies just trying to put down mopars....
Posted By: fast68plymouth
Re: Get yer Bulldog flow numbers here...... - 02/16/04 03:20 PM
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Why would someone cut into the floor for more flow when having more floor adds flow
obviously the guy porting the head has no idea of what he's doing.
im sure that someone who isnt working on the head, or hasnt seen one up close and personal would have a much better idea of how to get the exhaust numbers to come around.
Posted By: Quicksilver440
Re: Get yer Bulldog flow numbers here...... - 02/16/04 06:34 PM
Quote:
Quote:
Quote:
ummm he didn't read the post correctly then, MOPARs don't lack a floor, the head was a bad casting and the floor was too thing.
Thanks, I will bring this detail to his attention.
It wasn't misread
The hole is in the exhaust port floor. All of the high flow heads either raise the port or add material to the floor for more short turn radius. Why would someone cut into the floor for more flow when having more floor adds flow
oh...you must be new around here......