Mast LS3 Small Bore Heads
TECH Resident
Joined: Sep 2003
Posts: 848
Likes: 1
From: Working in the shop 24/7
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.
Still pretty cheap for new heads.
Maybe I'll sell mine later and try these out just because.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo I'd be curious to know what the HP/TQ difference is between the BSP and MAST heads. Anyone care to take a guess?
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.
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.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
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.
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.
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.
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.
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.
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.
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
Apparently, they don't think a 2.08" intake valve is too big either
http://www.mastmotorsports.com/2010/...sembled&id=360
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...
Staging Lane
Joined: Jan 2009
Posts: 77
Likes: 0
From: Adelaide, South Australia
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
) 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.
I'd love to try the masts out.
