99slobird

iTrader: (1)

Does anyone have any expierence with the mast 11 degree cathedral port head? I'm thinking of pulling the trigger on these heads for my stroked ms3 a4 car. I have also read about how I'll have to use ls3 style intake rocker arms so there is another 200 dollars to the sticker price? Does anyone have an idea about the push rods also, I'm currently runnin the hardened 7.4 and would kinda like to stick with those seeing how I'm on a budget. The heads flow really well and I am hoping to get good results from them. Ive done some searches for them and they all were old threads so I was worried that they may have become old technology and other companies might have far surpassed them? Any info would be greatly appreciated

BigRich954RR

iTrader: (1)

i love the mast heads and the TFS heads both great heads. but for the pushrods they might work or you might have to get new wont know for sure till you put it together and measure for them

hirdlej

iTrader: (31)

I can speak first hand about their customer service (or lack there of). For the simple reason they failed in that department, I went with AFR. Even if their heads would have given me another 10RWHP, to me it wasn't worth it. I told myself if the service is as bad as it was trying to buy something, imagine how bad it'd be if I had problems or needed warranty work or technical support. Mast has a lot of work to do in their customer service department.

99slobird

iTrader: (1)

Thank you. Anyone else with any information?

MastMotorsports

You will need a longer pushrod, should be around 8.150" but measuring is always best! I can set you up with a good deal on the rockers and pushrods if your interested. Give me or David a call M-F 8-5 CST and we will work up a quote for you. (936)560-2218

99slobird

iTrader: (1)

Why such long pushrod? Will my fast 102 intake and tb setup still work with these heads?

99slobird

iTrader: (1)

And just a thought. I would think a longer pushrod would have more of a likelyhood of bending or deflecting???

SOMbitch

iTrader: (8)

^^^^ Because the geometry of an 11* head naturally needs a longer PR. I am sure those heads can accomodate a thicker 5/8 or 11/16 PR so deflecting won't be a problem..

If you can afford those heads surely you can drop some cheddar for new PR's

MastMotorsports

Your FAST and throttle will work perfectly. The longer pushrod is needed because of the valve angle and the deck thickness and yes as "SOMbitch" stated we use a larger diameter pushrod with a thicker wall.

Cobra R

iTrader: (6)

I have a set of the med. bore heads on my 416 that I purchased from Virgina Speed.

I was able to run a 3/8 diam push rod. The heads look like a work of art. The decks are thick and honestly one of the heaviest aluminum heads I have ever picked up.

Unfortunately, I just got this setup running a little while ago. The car gets tuned on April 2nd, so I have no numbers yet. I will say that with a base mail order tune, this engine is very responsive.

I would not say this head is really a budget minded head. You will need the push rods, rockers and I would probably talk to VA speed about a cam to go with these heads. They seem to be one of the lead sellers of these heads.

A.R. Shale Targa

iTrader: (2)

Seems like getting the most amount of quality flow from the smallest runner
that will supply your CID is what makes responsive and torquey engines
Chevrolet rolled the valve angle from 23deg. to 15 for the LS series hence the
reason even cam only cars are in the tens. Trick Flow went 13deg
so naturally Mast @ 11deg is better yet with unshrouding the valves
The chamber is actually an extension of the port w/ the valve in the way
I'd love to see the shape of the port and how it promotes mixture swirl cuz
ultimately heads have to flow air and fuel. Totally wish I could afford a set
of these(maybe future tax return)

Cobra R

iTrader: (6)

Ok through a 3600 stalled 4L60E, 9" with 4.10 gears and 28" ET Street Radials the car made 500/472. I may have the wrong length push rods, cant remember what I put in the car, but the power dropped off pretty fast after the peak.

However to back up the dyno I ran the car at the track with a 10.35@130.99 the first time out for the car. The car has a small amount of weight reduction, but I am sure its still at least 3600 with me in the car.

red 454

old thread i know

but is there in fo on the MAST MAST MOTOR SPORT 11deg splayed valve heads
what is the differance to the black edition 11deg heads ??
are they race only heads ?
was woundering if they except yt6667 rockers

DONAIMIAN

iTrader: (18)

The splayed valve head needs a custom T&D or Jesel, and I'n sure nothing less than a 4.100 bore.