chop_runoou

mast heads they took over from etp heads i think did they ?
i will have a look . thank you for your advise sorry if i took this off topic

Beaflag VonRathburg

iTrader: (176)

I see the heads are being listed on multiple sites for sale, but I still haven't been able to find a price on the intake manifold. Standard deck: 19257851.

LPE 403

iTrader: (6)

x2...have a set going on mine.

O.N.

anymore info on these heads?
how are cars going with them now?
pics video dynos?

MotoFreak

wow.. SICK 454

454spyder

Those are some great numbers from the GMPP LSX454 - helped by the manual trans. So you removed the heads, had them CNC ported/shaved, then installed a big cam? Nice gains if the 638 is close.

I have a bone stock small cam GMPP LSX454 with Cary's intake and 50lb injectors with 2" primary headers and made 501 RWHP through a powerglide/loose converter/Ford 9" rear on a dynojet dyno..

I'm guessing that I would make 550-560 RWHP with a manual and different rearend.

Todd

O.N.

what size is your throttle body and manifold, im also using a duspeed intake on mine they flow alot better then some of the stuff you guys have in the USA.


Your HP figure is about right if you haven't ported and shaved the heads.
There is alot more power to be had from those heads when worked properly.

454spyder

Intake: Mast Motorsports - CNC 2 piece intake 4500 EFI LS7
with an Accufab 4500 throttle body - the 2.25" butterfly model.

I went with this TB and Intake since I plan to go with more cam/head porting maybe later this year.

O.N.

anymore info on these DR heads?
how are cars going with them now?
pics video dynos?

flewbyyou04r1

iTrader: (34)

anyone using these heads forced induction?

UGotBeaT

They seem to be ok for forced induction...i have no direct experience with them but heads similar to them for a sbf. i believe they have a 5/8ths thick deck which isnt to Bad.

Whats the application? On inline valve heads you need to watch valve and throat sizes as the bowls can get thin and crack. But going to be dependant on the app. all in all tho seems like a good head

Ron@Vengeance

iTrader: (51)

We are making 1030HP NA using the LSX DR Cylinder heads...

UGotBeaT

Ron who did the heads?

They can be great for n/a..theyre real similar to a gv2..but the cnc work offered from gm leaves for alot of improvement imo...better to get them raw

O.N.

are you saying that NA these DR heads can make more HP than a set of MOZEZ heads?

Ron@Vengeance

iTrader: (51)

No I am saying we are making 1030HP on our 440 LSX using LSX DR Cylinder heads.. Im sure if we went with Mozez heads there would be potential for more power, BUT there is a weight penalty in our class for canted valve cylinder heads.