Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115442
07/22/16 12:37 PM
07/22/16 12:37 PM
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Posts: 14,543 So. Burlington, Vt.
fast68plymouth
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That 315+ is way way more than I've gotten out of them. But, I'm usually going for the no-holes-no-tubes plan. I think low 280's is the best I've gotten out of a basic porting job, 2.055 valve. Those made 589hp on a 419.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Small block Mopar ProMaxx head testing
[Re: fast68plymouth]
#2115459
07/22/16 12:56 PM
07/22/16 12:56 PM
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pittsburghracer
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"Little"John
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That 315+ is way way more than I've gotten out of them. But, I'm usually going for the no-holes-no-tubes plan. I think low 280's is the best I've gotten out of a basic porting job, 2.055 valve. Those made 589hp on a 419. This project was for a very good Friend that does my transmission work and it became a challenge project for me. They started out with me repairing a set of 400 dollar open chamber Edelbrock (340) style that I repaired then added a 2.05 valve. He was then curious how much we could get out of a 2.08 valve so I tried it. Without moving the pushrod I would NEVER do a set like this for anyone again, except for myself. A 2.05 is the way to go. He ended up never even using them and when he said he was going to sell them I bought them back because I had to much time in them to not have them. Being retired and not doing it for a living allows me to play around and I love flow testing and probing a port.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115461
07/22/16 12:56 PM
07/22/16 12:56 PM
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Porter67
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115467
07/22/16 01:03 PM
07/22/16 01:03 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Ok, good info.
So the procomp is the same as speedmaster? I do not like what i have seen in the procomp stuff for brand x
The promaxx is different then those castings?
I was in the market for sb heads and found it very confusing
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Small block Mopar ProMaxx head testing
[Re: sixpackgut]
#2115469
07/22/16 01:10 PM
07/22/16 01:10 PM
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pittsburghracer
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Ok, good info.
So the procomp is the same as speedmaster? I do not like what i have seen in the procomp stuff for brand x
The promaxx is different then those castings?
I was in the market for sb heads and found it very confusing Did you watch the videos as they will answer a lot of your questions. This head is not even on the same page as the speedmaster (old procomp) and in my eyes so far is way superior than the Edelbrock.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115525
07/22/16 02:42 PM
07/22/16 02:42 PM
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Joined: May 2005
Posts: 2,094 Apollo, PA.
B1MAXX
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Just to put this out there.... not a reflection on the Promaxx stuff. But I would find someone that has real world experience with them from a durability standpoint. My buddy just dropped off his truck with a very nice 496 stroker BBC short block topped with offshore heads and the quality of the guides and valves wrecked the whole thing. I am talking about mushroomed valve stems to the keepers , a valve that dropped a head off with no prior evidence of touching anything, valve to piston was .270, and valve guides that are .030, yes .030, out of round. The heads were very nice out of the box...I could not tell the metallurgical make up of the parts though. the casting looks ok even after all the destruction...... Has anyone run these heads for any extended period of time?
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Re: Small block Mopar ProMaxx head testing
[Re: B1MAXX]
#2115529
07/22/16 02:47 PM
07/22/16 02:47 PM
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And what kind of heads were these. Please don't tell me procomp speed masters because there is a crazy amount of info out there to stay away from those heads.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115667
07/22/16 06:06 PM
07/22/16 06:06 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Ok, good info.
So the procomp is the same as speedmaster? I do not like what i have seen in the procomp stuff for brand x
The promaxx is different then those castings?
I was in the market for sb heads and found it very confusing Did you watch the videos as they will answer a lot of your questions. This head is not even on the same page as the speedmaster (old procomp) and in my eyes so far is way superior than the Edelbrock. Im in mexico. I will check them out when i get home
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115672
07/22/16 06:13 PM
07/22/16 06:13 PM
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Joined: May 2005
Posts: 2,094 Apollo, PA.
B1MAXX
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And what kind of heads were these. Please don't tell me procomp speed masters because there is a crazy amount of info out there to stay away from those heads. These were not Procomp/ Speedmasters............
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Re: Small block Mopar ProMaxx head testing
[Re: moderncylinder]
#2115684
07/22/16 06:39 PM
07/22/16 06:39 PM
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pittsburghracer
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"Little"John
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Those are the ProComp/ Speed Master Heads Ok I always up for a good challange. I called and talked to PROMAXX in Alabama and Steven told be these are not Procomp (speedmaster) heads. 100 percent of the machining is done in house. So from this point on all the naysayers PLEASE start your own post and post any results YOU find. No wonder guys that used to pass tech on this site are in hiding and no longer post. PROMAXX http://www.promaxxperformance.com/index.php/racing-parts/sbc.htmlPROMAXX (Speedmaster) https://speedmaster79.com/contacts/
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115687
07/22/16 06:42 PM
07/22/16 06:42 PM
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Posts: 14,543 So. Burlington, Vt.
fast68plymouth
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If you go to the speedmaster website, it says that procomp is the sole US distributor for speedmaster. So speedmaster is procomp.
I can't speak about the SB mopar heads, but when the Sidewinder BB heads were first being talked about, one of the owners of the foundry in china confirmed that at least for the BB Mopar head that it was the same head as the ProMaxx head.
I just received a set of speedmaster BB mopar heads, and I can see no difference between these and the Sidewinder heads. They even came in the same looking box.
My guess is, the speedmaster/procomp/ProMaxx SB mopar head is all the same casting.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Small block Mopar ProMaxx head testing
[Re: fast68plymouth]
#2115696
07/22/16 06:56 PM
07/22/16 06:56 PM
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pittsburghracer
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"Little"John
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Watch the videos on the valve guides. procomp like I said changed their name to Speedmaster because of poor reviews. They are sold right of the ship from China like all the junk electrical products. ProMaxx too recieves them off the ship from Chine as a rare casting then machined in-house adding to the price of the Speedmaster product. I'm done.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115711
07/22/16 07:18 PM
07/22/16 07:18 PM
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Joined: Jan 2003
Posts: 14,543 So. Burlington, Vt.
fast68plymouth
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I don't doubt the guides are better. When ProMaxx was Patriot they used to advertise that the guides were made and sized in the USA.
Edit- just checked one of my catalogs for ProMaxx, says all heads come with USA made guides.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115719
07/22/16 07:24 PM
07/22/16 07:24 PM
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Re: Small block Mopar ProMaxx head testing
[Re: pittsburghracer]
#2115727
07/22/16 07:33 PM
07/22/16 07:33 PM
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Re: Small block Mopar ProMaxx head testing
[Re: Wedgeman]
#2115759
07/22/16 08:06 PM
07/22/16 08:06 PM
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to Bad our Promaxx heads didn't stand a few mile in a Little red.... a valve spring broke in 3 pieces and dropped a valve......
BUMMER......... Can I see some pictures of the head PLEASE. Front, back, ex side, and intake side please.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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