Are Speed Master and Pro Max BB aluminum heads any good?
#2758690
04/02/20 01:55 AM
04/02/20 01:55 AM
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Joined: Aug 2003
Posts: 43,175 Bend,OR USA
Cab_Burge
OP
I Win
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OP
I Win
Joined: Aug 2003
Posts: 43,175
Bend,OR USA
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I have a customer who has to many motors and wants me to put a set of economical price aluminum cylinder heads on his 383 forged piston short block. That motor had a set of 440 Source ported Stealth heads on it that he had me use on one of his bigger C.I. pump gas stroker motors for his street 1971 Challenger. Has anyone on here used any of them, shops or individuals If so what are your thoughts on them, good or bad I seen them on Summit and found out that they are owned and made by the same company, China made imports also MODS, what's up with the time stamps on here it is 10:55 PM PDT here in Bend, OR not 5:55 A.M.
Last edited by Cab_Burge; 04/02/20 01:58 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: Cab_Burge]
#2758724
04/02/20 07:57 AM
04/02/20 07:57 AM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
pro stock
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pro stock
Joined: Jul 2008
Posts: 1,534
bronx n.y
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I have a customer who has to many motors and wants me to put a set of economical price aluminum cylinder heads on his 383 forged piston short block. That motor had a set of 440 Source ported Stealth heads on it that he had me use on one of his bigger C.I. pump gas stroker motors for his street 1971 Challenger. Has anyone on here used any of them, shops or individuals If so what are your thoughts on them, good or bad I seen them on Summit and found out that they are owned and made by the same company, China made imports also MODS, what's up with the time stamps on here it is 10:55 PM PDT here in Bend, OR not 5:55 A.M. im guessing he dont want to buy a better set
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: one bad fish]
#2758743
04/02/20 08:50 AM
04/02/20 08:50 AM
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Joined: Nov 2015
Posts: 876 Missouri
jwb123
super stock
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super stock
Joined: Nov 2015
Posts: 876
Missouri
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I run a set of procomp, which I think with name changes is speed master now, not sure. But they are a copy of the Edelbrock Victor Jr. At the time I bought them, I knew I was going to port them and remove a lot of material so I wanted to screw up a cheap set, not a good set of heads experimenting. They worked out good so I have just used them for several years. I did however buy good valves, springs, retainers, and these heads require offset rockers, so nothing was really cheap about them. If you are going to use standard rockers, the ported stealth heads would be a decent choice. All the good big block mopar heads require offset rockers, which really drives up the cost. I have not run any of the trick flow heads everybody is talking about. But just from what I have seen all the cheaper knock offs that use straight rockers all flow similar, not much difference in performance. Some of the guys on here that build more engines than me may have different experience
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: jwb123]
#2758772
04/02/20 10:01 AM
04/02/20 10:01 AM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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I put them in the same category as the stealths........ perhaps the stealth valve job is more consistent. I always redo that anyway, so that’s not a factor for me.
I have seen some SM valve jobs that really needed some attention, so plan for that if you go that route.
When the SM aren’t on sale, I think the stealths are cheaper.
SM are available as straight or angle plug.
I had some SM here that showed in the specs on line that they were 75cc chambers. They were not......... they were 84cc.
The intake port openings are somewhat oddly shaped, with the port divider being way wider/thicker than the gasket.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: fast68plymouth]
#2758781
04/02/20 10:16 AM
04/02/20 10:16 AM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,498
So. Burlington, Vt.
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Valley pan centered on bolt holes, plus ex port opening.
The stealths are better from these two views imo.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: fast68plymouth]
#2758782
04/02/20 10:17 AM
04/02/20 10:17 AM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,498
So. Burlington, Vt.
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Remachined seats & tweaked in/ex openings:
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: one bad fish]
#2758792
04/02/20 10:36 AM
04/02/20 10:36 AM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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Posts: 14,498
So. Burlington, Vt.
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i was just about to order some trick flows to replace my stealths If you have the cnc ported stealths, it won’t be a big change. If they’re ootb or just “prepped”, you should see a nice improvement........ provided you have enough motor to use it.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: fast68plymouth]
#2758802
04/02/20 11:00 AM
04/02/20 11:00 AM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
pro stock
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pro stock
Joined: Jul 2008
Posts: 1,534
bronx n.y
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i was just about to order some trick flows to replace my stealths If you have the cnc ported stealths, it won’t be a big change. If they’re ootb or just “prepped”, you should see a nice improvement........ provided you have enough motor to use it. just 440 like 10 to 1 solid cam
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: viperblue72]
#2758819
04/02/20 11:32 AM
04/02/20 11:32 AM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
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pro stock
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bronx n.y
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I have the sidewinder heads from marsh performance. I hear they are the same casting. I got them bare with valves for $849 iirc. My head porter traded me some work to build them so cost for me was 1200 ported with good springs locks retainers. They have roughly the same potential as a rpm if you plan to port them. They seem to be a good quality aluminum and a good casting. My porter did mention he thought the short side was shorter than a rpm, kind of like a 516 head. But I’ve seen Duane and others on here say these are the easiest head of the budget ones to get 300cfm. I go straight to a better head if the port work wasn’t free. By the time you put all the work into these you’re only 2-300 dollars less then a trick flow. To me these days just getting trick flows is a no brainer for this category of performance heads. sounds good to me
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: krautrock]
#2758824
04/02/20 11:54 AM
04/02/20 11:54 AM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,498
So. Burlington, Vt.
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If I were building something here and was planning on using a budget oriented aftermarket head it would get E Streets. Ede heads have high quality guides and and I have more faith in the hardware.
I always check them over........ and I usually end up honing the guides a bit and touching up the valve job.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: fast68plymouth]
#2758826
04/02/20 12:00 PM
04/02/20 12:00 PM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
pro stock
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pro stock
Joined: Jul 2008
Posts: 1,534
bronx n.y
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If I were building something here and was planning on using a budget oriented aftermarket head it would get E Streets. Ede heads have high quality guides and and I have more faith in the hardware.
I always check them over........ and I usually end up honing the guides a bit and touching up the valve job.
do they come cnc already
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: one bad fish]
#2758851
04/02/20 12:57 PM
04/02/20 12:57 PM
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Joined: May 2014
Posts: 179 California, U.S.A.
Torquemonster440
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member
Joined: May 2014
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California, U.S.A.
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I'm running a set of Promaxx BB heads. I upgraded the springs, locks and retainers to Comp Cams stuff that is matched to my .528 MP solid cam. I have only made a couple of passes since the head swap. With my big valve 906's my best e.t. was 12.55 @107.75. With the Promaxx's my best pass out of 2 was 12.64 @108.5 with no tuning. Also, that track was at 3,500 ft. Elevation vs my home track at 500 ft elevation. So, corrected it came out to like, a 12.28 pass. I still have a lot of tuning to do as well as practicing my launch technique. My 60' is pretty weak.. 1.84-1.90 range. But over all I'm happy with the Promaxx's.
1966 Satellie.. 12.55 @107.75. 906 heads. 3780 lbs.
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: Torquemonster440]
#2758855
04/02/20 01:03 PM
04/02/20 01:03 PM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
pro stock
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pro stock
Joined: Jul 2008
Posts: 1,534
bronx n.y
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I'm running a set of Promaxx BB heads. I upgraded the springs, locks and retainers to Comp Cams stuff that is matched to my .528 MP solid cam. I have only made a couple of passes since the head swap. With my big valve 906's my best e.t. was 12.55 @107.75. With the Promaxx's my best pass out of 2 was 12.64 @108.5 with no tuning. Also, that track was at 3,500 ft. Elevation vs my home track at 500 ft elevation. So, corrected it came out to like, a 12.28 pass. I still have a lot of tuning to do as well as practicing my launch technique. My 60' is pretty weak.. 1.84-1.90 range. But over all I'm happy with the Promaxx's.
kool
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: viperblue72]
#2758952
04/02/20 02:46 PM
04/02/20 02:46 PM
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Joined: Aug 2011
Posts: 2,860 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,860
Pattison Texas
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I have the sidewinder heads from marsh performance. I hear they are the same casting. I got them bare with valves for $849 iirc. My head porter traded me some work to build them so cost for me was 1200 ported with good springs locks retainers. They have roughly the same potential as a rpm if you plan to port them. They seem to be a good quality aluminum and a good casting. My porter did mention he thought the short side was shorter than a rpm, kind of like a 516 head. But I’ve seen Duane and others on here say these are the easiest head of the budget ones to get 300cfm. I go straight to a better head if the port work wasn’t free. By the time you put all the work into these you’re only 2-300 dollars less then a trick flow. To me these days just getting trick flows is a no brainer for this category of performance heads. Not trying to stir the pot, BUT is this true on the Sidewinder Dwayne ? But I’ve seen Duane and others on here say these are the easiest head of the budget ones to get 300cfm.
Last edited by csk; 04/02/20 05:11 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Are Speed Master and Pro Max BB aluminum heads any good?
[Re: fast68plymouth]
#2758974
04/02/20 03:07 PM
04/02/20 03:07 PM
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Joined: Dec 2013
Posts: 4,673 Wichita
GY3
master
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master
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Wichita
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If I were building something here and was planning on using a budget oriented aftermarket head it would get E Streets. Ede heads have high quality guides and and I have more faith in the hardware.
I always check them over........ and I usually end up honing the guides a bit and touching up the valve job.
My neighbor just build a 493" RB with out of the box E Streets. His machinist said they were good to go out of the box. With a very mild cam it made an easy 500 HP.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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