weldermike27408

Anyone have any experience with these ?? They offer them in an As Cast P-Port version with accessory holes drilled...no VJ ,no CNC work just the guides i think
http://www.racingheadservice.com/rhs...nder-headhtml/

lil john

I think WCCH has a program.Try typing on Xbox360 in a hotel

weldermike27408

I have a head porter locally in NC...did my 243's...just been considering a swap to TrickFlow heads but im up in the air about it.
First option I thought of was doing just a TFS head swap with my current cam. If I'd need a new cam to optimize the TFS heads Ill just wait and do an LS7 based top end.The RHS Pro Elite as cast bare are right on par with TFS as cast bare heads pricewise.

Spec C

Bump.. Any other info on these? I am strongly considering these as well. Can't find a ton of results however.

Jimbo1367

I am surprised more info isn't floating around on these. Kinda sad RHS doesn't send some of these to a magazine that has a 416 dyno mule.

lil john

I got numbers large port 296cc flow in 390 range look in gmhightech heads & cam 0n a gen5 camaro. Looks better for 454 or better with a good head porter as cast versions could mean smaller port programs.

weldermike27408

I found one article where they put them on a 2011 LS3 Camaro .... the link I saved on my desk top in NC...im working in GA "LS7 UP" is name of article....
I was wondering if theyd be a good choice with the right cam in a heavy 2005 GTO or if I should stick with cathedral port heads...

Jimbo1367

WelderMike,
Do you recall what magazine you seen that in?
jim

andysc

iTrader: (6)

There's an article in GM Hightechperformance from a couple of months ago about these heads. They are on a ls3 in a 2012 Camaro SS with a futural cam and other bolt ons. The article compared a fast 102 to a ls7 factory intake. Made good numbers, I believe around 490 hp and 430 tq with either intake. I can check to see the exact month.

hth

Andy Schuck

andysc

iTrader: (6)

Here is the article I mentioned a couple of days ago.


http://www.gmhightechperformance.com...y_intake_test/

hth

andy schuck

lt1773

iTrader: (1)

RHS ls heads r bad *** and u will really like it,new design optimize air flow , raise flange for better flow

Jimbo1367

From what I read (Skimmed rather quickly)on that article, I wasn't impressed at all. Kinda pointless IMO, other than letting comsumers know another LS7 head option is out there.

DaGreightOne

Does anyone know the deck thickness of these heads?

lazaris

iTrader: (5)

They are .750

lt1773

iTrader: (1)

u can use them for boos application and NA

JakeFusion

iTrader: (7)

The WCCH program is proven. I've seen where they made 803HP on an engine dyno for a 436 with a solid roller and carb style intake.

I think others have made 720rwhp with them on a 440.

I'd definitely go LS7 heads on anything with a 4.125" bore. I wouldn't even worry with cathedral ports.

Crf450r420

iTrader: (1)

These are bada$$ heads. Got them running on a 465ci and two 490ci motors. Much better design for building power over the Black label heads that just flow big numbers.

Spec C

What kind of power did they make? Were these the out of the box CNC'd ones or did you have someone work them over?

CAMSTER

iTrader: (10)

Stock, the LS3 produced 469 hp at 5,800 rpm and 465 lb-ft at 4,800 rpm. With just the Mast cam, peak power increased to 533 hp, a gain of 64 hp, and the rpm at peak increased by 600 rpm, to 6,400. Torque improved to 480 lb-ft at a higher 5,400 rpm. Not bad! Next, we bolted on the Mast heads and discovered they require 8.150-inch pushrods, which are longer than stock. The heads moved the numbers to 568 hp at 6,400 and 507 lb-ft at 5,400 rpm—gains of 35 hp and 27 lb-ft with no change to the peak rpm points.
Conclusions
The Mast camshaft gives up torque below 3,200 rpm, but on average from 2,000 to 6,800 rpm, it’s far stronger than stock. The larger cylinder heads—which, in bench racing theory, make less low end—made up for the torque losses of the cam, matching the stock torque numbers through 3,200 rpm, then climbing to a curve that destroys the stock setup. The 568 hp and 507 lb-ft make for an easy mid-11-second dragstrip pass, even in a 3,900-pound car.

Bottom Line
You get 100 hp for around $4,000, but to see that gain in the car, you’ll also need long-tube headers, a cold-air kit, and a custom tune.

Dyno Results: LS3 Bolt-Ons
SOURCE
Mast Motorsports
330 NW Stalling Drive
Nagodoches
TX 75964
866-551-4916
www.mastmotorsports.com

Mast Motorsports LS3 Cam And Heads
mast_motorsports_ls3_cam_and_heads/#ixzz2lS2MMIf2[/url]

Spec C

Are you recommending their ls3 head or their stuff in general?