Mast Small Bore Rectangle Port Heads
Mast Small Bore Rectangle Port Heads I only found one dyno for these heads, which happened to be on an LS1 short block, and Im curious if anyone here has any first hand experience. We are wanting to build a 4" bore, high compression (14.5-15.0) LS2/L76 short block using these heads. I also only found one dyno with them on an LS3 block...seems real world info is scarce on them for some reason. Or Im just looking in the wrong places.
TECH Enthusiast
Joined: Jan 2010
Posts: 578
Likes: 4
From: REALITY
Its going to be tough, due to their cost..... They may have priced themselves out the market.... Especially with this economy, dropping that much bread on a head when there are other budget minded heads available....
Once they collect dust on the shelves for a while, we'll see sales if the egos does not get in the way. I don't know anyone with them, and I bet they prob are a great head, but the cost...
Bozz
Once they collect dust on the shelves for a while, we'll see sales if the egos does not get in the way. I don't know anyone with them, and I bet they prob are a great head, but the cost...
Bozz
The price on these heads are not unreasonable.. The reason u don't find much on these heads on here is because these heads are more for the hardcore racing and havent been out long, especially here on tech.. Check on yellow bullett you will see alot of these heads on there.. U have to compare apples to apples, the only head that compares to these are the All Pro and they arent cheap either... Once u get one in ur hand u will see why they are the price they are.. Top Notch!
I think either super chevy or hot rod maybe car craft did a several page article with a LS3 stroker with a bunch of different as cast and CNC heads and the Mast were one of them. Of course the Mast, AFR, and TFS all had the highest HP and TQ. TEA, TSP, Edelbrock and other's were also in the comparison.
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I think either super chevy or hot rod maybe car craft did a several page article with a LS3 stroker with a bunch of different as cast and CNC heads and the Mast were one of them. Of course the Mast, AFR, and TFS all had the highest HP and TQ. TEA, TSP, Edelbrock and other's were also in the comparison.
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the article the op is refering to is in the GMHTP mag some time last year. they used a camp cam speced for these heads, fairly odd compared to standard ls cams. i think it was like 22x/24x cant really remember exactly. the numbers they picked up were not impressive at all. they put down only about 440 rwhp with an ls3 intake. plus the price for a set of BARE heads is 2500 bucks, then with the options of rocker arms, pushrods, valves, and springs, and all those are nothing special to them just standard GM comes out to about 3200 bucks if i remember when i happened to price them. with a good set of standard ls heads such AFR, TFS, TEA, or nice set of ported 243/799 and a good cam you achieve those numbers and exceede it for about oh, 2 grand less. so what is hardcore for who?
the article the op is refering to is in the GMHTP mag some time last year. they used a camp cam speced for these heads, fairly odd compared to standard ls cams. i think it was like 22x/24x cant really remember exactly. the numbers they picked up were not impressive at all. they put down only about 440 rwhp with an ls3 intake. plus the price for a set of BARE heads is 2500 bucks, then with the options of rocker arms, pushrods, valves, and springs, and all those are nothing special to them just standard GM comes out to about 3200 bucks if i remember when i happened to price them. with a good set of standard ls heads such AFR, TFS, TEA, or nice set of ported 243/799 and a good cam you achieve those numbers and exceede it for about oh, 2 grand less. so what is hardcore for who?
P/N 510-302
Retail: $1499.99 ea
Flow Data w/4.000" Bore Plate
Lift Intake Exhaust
0.100 74 61
0.200 146 119
0.300 222 188
0.400 282 219
0.500 330 236
0.600 360 251
0.700 372 260
I have owned or seen all these heads on the dyno and the Mast/old ETP heads made the most HP and are superior quality.
Wow this thread took off all the sudden. Yea the small 4.0" bore head is the one we are looking at, not the 3.9". This is also a "money is no object" type build. Those flow numbers look pretty dang good and we are talking about a .700-.720 lift cam. Thanks for the info.
No way the Mast heads are $2,000 more..... here you go $3,000 for a set ready to bolt on.
P/N 510-302
Retail: $1499.99 ea
Flow Data w/4.000" Bore Plate
Lift Intake Exhaust
0.100 74 61
0.200 146 119
0.300 222 188
0.400 282 219
0.500 330 236
0.600 360 251
0.700 372 260
I have owned or seen all these heads on the dyno and the Mast/old ETP heads made the most HP and are superior quality.
P/N 510-302
Retail: $1499.99 ea
Flow Data w/4.000" Bore Plate
Lift Intake Exhaust
0.100 74 61
0.200 146 119
0.300 222 188
0.400 282 219
0.500 330 236
0.600 360 251
0.700 372 260
I have owned or seen all these heads on the dyno and the Mast/old ETP heads made the most HP and are superior quality.
the article the op is refering to is in the GMHTP mag some time last year. they used a camp cam speced for these heads, fairly odd compared to standard ls cams. i think it was like 22x/24x cant really remember exactly. the numbers they picked up were not impressive at all. they put down only about 440 rwhp with an ls3 intake. plus the price for a set of BARE heads is 2500 bucks, then with the options of rocker arms, pushrods, valves, and springs, and all those are nothing special to them just standard GM comes out to about 3200 bucks if i remember when i happened to price them. with a good set of standard ls heads such AFR, TFS, TEA, or nice set of ported 243/799 and a good cam you achieve those numbers and exceede it for about oh, 2 grand less. so what is hardcore for who?
BTW hp numbers were on a engine dyno not at the wheels.
http://www.hotrod.com/techarticles/e...est/index.html
Here is the article, I highly recommend reading it.
Here is the article, I highly recommend reading it.
Definitely a great read. This is not my motor. It is for a race car that requires stock style heads. The motor in the car is an LS9 so we must run rectangle port heads. The benefit of a 6.0l is a larger restrictor. Thanks again for the info guys
I'd go with the GM performance parts CNC LS3 heads. Cheap and effective out the box. If you didn't have to run rectangle port heads, but they had to be stock style then the Pro Comp CNC 243's look very promising. Even having the smallest port volume out of all the heads in that shootout (215cc) they made the most peak power, even over TFS, AFR and Mast.
I'd go with the GM performance parts CNC LS3 heads. Cheap and effective out the box. If you didn't have to run rectangle port heads, but they had to be stock style then the Pro Comp CNC 243's look very promising. Even having the smallest port volume out of all the heads in that shootout (215cc) they made the most peak power, even over TFS, AFR and Mast.