Titokang

iTrader: (2)

Exactly phoenix, whatever ed recommends for his cam is what I'll run. Mchicia, your car still runs damn good!

mchicia1

iTrader: (5)

Ya not too bad, thanks . Blower is going on later so it won't really make a difference anyway ha.

Rise of the Phoenix

iTrader: (27)

Where did you get your MAST heads from?

Titokang

iTrader: (2)

http://paceperformance.com/i-5145679...re-single.html they are sponsors on here

mchicia1

iTrader: (5)

Nice, thank you.

Ed Curtis

That's castings and valves for roughly $2400 a pair. You have to add in the spring package and rocker stands to get a total price. Of course, valve spring choice can add a little (or a lot) to that end price.

Titokang

iTrader: (2)

Yup, pace also has the assembled heads for 1230 a piece with standard ss valves, and beehives. All you'd need is stands which are 80-90 a set, 8 offset rockers and your golden pony boy.

mchicia1

iTrader: (5)

True, but the same can be said about the BSPs. I guess in the end, I paid $1650 assembled with rocker stands.

Still pretty cheap for new heads.

Maybe I'll sell mine later and try these out just because.

Rise of the Phoenix

iTrader: (27)

I'd be curious to know what the HP/TQ difference is between the BSP and MAST heads. Anyone care to take a guess?

mchicia1

iTrader: (5)

The masts are 62CC chambers and are 240cc intake volume vs the BSP 70cc/255cc respectively.

With the same cam, I would guess the mast would peak a bit higher, but it would probably have a much broader powerband from the smaller intake runner and higher compression.

Rise of the Phoenix

iTrader: (27)

True, but you could always mill the BSP heads and raise compression. Flycutting would be a requirement, but I bet it would make an *** load of difference.

dr_whigham

iTrader: (49)

Something I've been curious about, and this may sound far fetched... How hard would it be to either epoxy or weld the intake runners to make them say a 230cc or so?

Surely that would bring the powerband down in the RPM range and maintain a bit better velocity for sub-4k torque.

It's just an idea. Even Mast said they're more "optimized" for a stroker, but work fine on a 346; They just don't begin to really "shine" till after 4500.

I'm thinking this is where cam selection and valve events come into play, which Ed could shine more light on.

Rise of the Phoenix

iTrader: (27)

I'm sure the right cam can take care of that below 4k issue. I guess I just don't really care a whole lot anymore about power below 4k, which is why I wish I'd have gone a lot bigger on the cam than what I have now. A new cam will be in order anyway once I switch over to the Super Victor/4150 TB.

mchicia1

iTrader: (5)

Mine are milled .030" with .040" cometics. I'm still only at like 10.1:1 since I have -3.2cc pistons and I believe Wiseco are zero deck pistons.

mchicia1

iTrader: (5)

My cam has an IVC of 37.5 and it's still a little lazy below 4k. There's nothing you can do about it with these heads on a 347.

I don't care though.

If you can find a way to get 11:1 with these heads, it will help a ton.

Everyone has a different definition of lazy though. When I say lazy, I mean it doesn't snap ahead..it still goes fine. Even my AI 226 + 226/230 cam setup was lazy below 3500. They're 347s, they're gonna be a bit lazy down low.

mchicia1

iTrader: (5)

They're $2600 fully assembled right on their website. Although, I thought I saw somewhere they were 240cc. They are 253 it appears, basically stock ls3.

Apparently, they don't think a 2.08" intake valve is too big either

http://www.mastmotorsports.com/2010/...sembled&id=360

red fury

iTrader: (1)

Why not consider the Mast 215 cc's? We all know the car with the better HP and TQ avg wins the race. Instead of having on and off power...

SIG-054

Mill the MAST's and still won't have to flycut pistons. I'm at 11.8scr with a large cam with clearance. The benefit of an 11degree head.

I'm running REV stainless valves, had the spring bases machined out for k motion k800 valve springs.

These heads can also accept larger pushrods, can the bsp's do that? (Not being smart, just a Q )

mchicia1

iTrader: (5)

Yes, I am running 3/8" pushrods in mine. Factory LS3 heads can take 3/8", that's all the BSPs are is a factory head with a special valve modification that allows it to fit in a small bore 3.898".

I'd love to try the masts out.

Titokang

iTrader: (2)

Sig, you have a part number for the valves? What pushrod length/diameter are you running.