Ive been looking at ebay heads for about a month. Victors seem to be a little big and very pricey. Speedmaster 190cc heads would be perfect but Ive read quality is sketchy. After reading the below thread It appears the promaxx heads are about perfect for my application BUT the exhaust flow #'s leave me feeling congested. (pun intended)
So far for the bottom end Ive got diamond dish pistons, eagle rods, TS 1/16 rings, main studs, Comp blower cam with .512 lift/114lsa and may get a girdle.
My chinese knockoff mag iron heads, the intake holes are way higher than normal EQ heads. Might also be porosity issues (blowing combustion into the cooling system) tho in fairness that might be my head gasket fiasco (ain't got to the bottom of it yet). they were supposed to be legit EQ heads & I would put his dealer name out there but the last time I did it got deleted.
live every 24 hour block of time like it's your last day on earth
Re: Chinese head choice for Blown/Turbo Smallblock
[Re: Prochargedmopar]
#2304454 05/14/1707:01 PM05/14/1707:01 PM
Why not look at the edelbrock rpm heads the cost is the same as the over sea heads
Appears the ProMaxx 9360's are $200 less and according to Pittsburghracer they flow 20cfm more.
I guess I could go with the EQ Iron heads but they are like $500 ea, heavy, and I'd have to do lots of porting I assume to match the ProMaxx heads.
I'm lost on all this but have $1400 burning a hole in my pocket. LOL
The ProMaxx heads jumped "way up" in price since my Friend bought them for 1050.00 I would have to think twice about buying them now but we are set pretty good with lots of Edelbrock heads. LOL. They do offer CNC'd heads now too. (ProMaxx)
The ProMaxx heads jumped "way up" in price since my Friend bought them for 1050.00 I would have to think twice about buying them now but we are set pretty good with lots of Edelbrock heads. LOL. They do offer CNC'd heads now too. (ProMaxx)
So being $300 more than a couple years ago they are not worth that? You've played with many of these heads. Which do you think would be best run close to ootb?
I have a set of factory magnums in hand but they would need the full workup and I'm not sure I have a week to spare. And really no way to verify what I've done is legit except for track mph. This is about all the time I had to work on the project this weekend because of POTTY time/baby sitting.
Last edited by prochargedmopar; 05/14/1709:14 PM.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: Chinese head choice for Blown/Turbo Smallblock
[Re: Prochargedmopar]
#2304523 05/14/1709:29 PM05/14/1709:29 PM
I personally would not run ant head out of the box but its nice being able to do your own work. An Edelbrock head out of the box is now a piece of CRAP!!!!!!!!! After checking out the ProMaxx heads I'm betting I could have a set ready to both on in under 2 hours time checking things over, (guides, valve job, spring pressure< ect) I didn't check every guide or spring pressures for my Friend as it was a quick, fast FREE-be. Quality and flow numbers were both better than the new set of Edelbrock heads I have sitting here for a project of mine.
I personally would not run ant head out of the box but its nice being able to do your own work. An Edelbrock head out of the box is now a piece of CRAP!!!!!!!!! After checking out the ProMaxx heads I'm betting I could have a set ready to both on in under 2 hours time checking things over, (guides, valve job, spring pressure< ect) I didn't check every guide or spring pressures for my Friend as it was a quick, fast FREE-be. Quality and flow numbers were both better than the new set of Edelbrock heads I have sitting here for a project of mine.
I've been searching but cannot find promaxx heads for sbm that are cnc'd. Only the 190cc procomps which cost $600+ more than the standard 171cc heads.
Got a link?
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: Chinese head choice for Blown/Turbo Smallblock
[Re: Prochargedmopar]
#2304630 05/15/1712:26 AM05/15/1712:26 AM
I have had some personal PM's and emails because of my post and some have been in touch with Jason at ProMaxx. If they want to step into the conversation they can provide more info. This is a part of one of the PM's.
""We have multiple spring options. Cnc heads are 185cc runner looking at $1400 loaded for as cast, and $1900 loaded for cnc ported.
I also have flow charts but like I said they were from private PM's so I don't feel at ease posting them. If in dought call and ask for Jason at ProMaxx. They are kinda out of my price range right now and my next purchase will probably be a set of W7's for an R block I bought and a set of the new Victor heads.
Flow charts and CFM don't mean the same with boost.
,,
Why is that? It would seem to just amplify the efficiency. I would also assume that slightly bigger and lazier port wouldnt effect low end as much with artificial velocity.
I want to call Promaxx tomorrow and see if they would cnc the exhaust only.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: Chinese head choice for Blown/Turbo Smallblock
[Re: polyspheric]
#2305473 05/16/1701:34 PM05/16/1701:34 PM
For a turbo car, I would look at getting bare heads and having a head specialist install seats and valve that can handle the higher temperatures the turbo cars generate. Might also want to plumb a cooling line between the center exhaust ports.
Re: Chinese head choice for Blown/Turbo Smallblock
[Re: Prochargedmopar]
#2305495 05/16/1702:24 PM05/16/1702:24 PM
More boost will make up for poor head flow... but it doesn't mean more headflow won't make more power. As an example I went 10.08@136 on home ported iron heads at 20psi. I've been 9.80's@136mph on 17~18psi with CNC ported Eddy's with basically the same combo. A bit of that ET is 60ft, but you can see that it took less boost to go the same MPH.
Reading through this thread, I don't see anywhere that you've stated what your goals are for this project. I assume by your screenname that you're going procharged? If so how big of a blower, and how big is the motor it's going on?
If you're looking for budget 600hp, you don't need a whole lot of head. If you want 2000hp that's a different story.
General rule of thumb #1, If the blower is big enough, and you have enough fuel octane to run some decent boost... you can definitely err on the small side with the head and get away with it.
General rule of thumb #2, If the blower/turbo is small... or you're fuel quality limited... it would be wise to get as much out of the motor as you can N/A with your head choice.
Re: Chinese head choice for Blown/Turbo Smallblock
[Re: YO7_A66]
#2305537 05/16/1703:53 PM05/16/1703:53 PM