Ordered Mast Small Bore LS3's
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
cool your build is coming along, failure so far for me. ordered ls3 rockers from btr and were supposedly delivered yesterday and i got nothing. contacted chris at mast about my rocker stands not lining up and havent heard back yet. Have spring seat shims on the way from btr, im almost there.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
cool your build is coming along, failure so far for me. ordered ls3 rockers from btr and were supposedly delivered yesterday and i got nothing. contacted chris at mast about my rocker stands not lining up and havent heard back yet. Have spring seat shims on the way from btr, im almost there.
Did you try calling? That's how I always get a hold of them.
Btr platinums, got some .100 seats and 5/16 locks from ed last week. And I talked to chris Thursday, told me to email him pics so I did. Called twice today to his extension and couldn't get him on the line. Called usps as well and looks like I'm **** outta luck. Have to wait 10 days and file a claim I guess. Haha full of fail, but I'll let you know what happens if not I'd take yours off your hands if you aren't gonna need em
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Btr platinums, got some .100 seats and 5/16 locks from ed last week. And I talked to chris Thursday, told me to email him pics so I did. Called twice today to his extension and couldn't get him on the line. Called usps as well and looks like I'm **** outta luck. Have to wait 10 days and file a claim I guess. Haha full of fail, but I'll let you know what happens if not I'd take yours off your hands if you aren't gonna need em
Update, found my rockers in the mail box after work "wrong address" written on the box. Shims get here Thursday to setup my springs. Now just need to get the rocker stands straightened out 
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Verdad Gallardo Thanks man, cars been on the backburner and slowly I'm gathering everything. Next week my daughters going into surgery and she's my main priority. Can't wait to post up results, good luck with your build your not even gonna wanna hide these heads under a hood when you see em
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Thanks man, cars been on the backburner and slowly I'm gathering everything. Next week my daughters going into surgery and she's my main priority. Can't wait to post up results, good luck with your build your not even gonna wanna hide these heads under a hood when you see em
Morel 5452 solid rollers are next on the list. I just wish I had peoples opinions on them, like what kind of longevity they offer.
Pending your application....cubes and what not....the MAST heads at 240cc runner volume should have much better port speed (response) than a 261 GM LS3 heads ported out to 278......The shear cost would be up to you to decide "worth it"
Yep mines still not done, need to fix the stripped bolt holes on the block. Some things needed to get taken care of around the house and that screwed me, haven't sold the car lol so it'll get done just not in a rush. Its sat around for a couple months now but hope to be the 2nd one on tech to share results, sig on here had em on his sbe ls1 and the car ran good. We shall see guys
Bump
How do you guys think these heads would work on a G8 over the factory L92 heads? Right now I just milled mine .030" and stuck LS3 valves in. Car is a 114-115 trap car. Cam is a little 219/223 112+0, I'd prefer not to swap that but I would if I had to.
Could these heads realistically add 4-5 mph over factory L92s? I'd love to have a 120 mph DD again without having to go with a blower. 120 trap cars always felt just right for the street. I like the simplicity of N/A in a daily driver too. Plus it's a lot easier simply installing heads than trying to retrofit all the LSA stuff. I'm a parent now, so doing stuff in only 1 weekend is paramount.
I would hope these heads would add 20+ to the peak, but 40-50 in the mid range compared to regular L92s because of the small valve and better mid lift flow, but maybe that's asking too much.
If I bought them and only gained 1-2 mph, I'd be really disappointed though. I wish more people used them.
How do you guys think these heads would work on a G8 over the factory L92 heads? Right now I just milled mine .030" and stuck LS3 valves in. Car is a 114-115 trap car. Cam is a little 219/223 112+0, I'd prefer not to swap that but I would if I had to.
Could these heads realistically add 4-5 mph over factory L92s? I'd love to have a 120 mph DD again without having to go with a blower. 120 trap cars always felt just right for the street. I like the simplicity of N/A in a daily driver too. Plus it's a lot easier simply installing heads than trying to retrofit all the LSA stuff. I'm a parent now, so doing stuff in only 1 weekend is paramount.
I would hope these heads would add 20+ to the peak, but 40-50 in the mid range compared to regular L92s because of the small valve and better mid lift flow, but maybe that's asking too much.
If I bought them and only gained 1-2 mph, I'd be really disappointed though. I wish more people used them.
I'm not sure the investment would be worth the outcome to be totally honest with you. I'm sure you'll pick up some, but will it be worth the hefty price tag for those heads? I guess only you can answer that question.
5 mph is well worth $2500 if that's the case, I'm just not sure I want to be the guinea pig for that lol.
I know that one guy in his 5.7 Holden was running bottom 11's or 10s at mid 120s with those heads and his car weighed over 4k lbs. I don't even think he had skinnies, so that is impressive. Thing is, he had a giant cam with a giant stall, so it's hard to compare to my own car because I wouldn't be doing those two things.
I did find someone who gained 5 MPH over stock ls3s in their camaro, but they were the 255CC heads. I would imagine the 240CC would be better for the 6.0 though.
5 mph is well worth $2500 if that's the case, I'm just not sure I want to be the guinea pig for that lol.
I know that one guy in his 5.7 Holden was running bottom 11's or 10s at mid 120s with those heads and his car weighed over 4k lbs. I don't even think he had skinnies, so that is impressive. Thing is, he had a giant cam with a giant stall, so it's hard to compare to my own car because I wouldn't be doing those two things.
5 mph is well worth $2500 if that's the case, I'm just not sure I want to be the guinea pig for that lol.
I know that one guy in his 5.7 Holden was running bottom 11's or 10s at mid 120s with those heads and his car weighed over 4k lbs. I don't even think he had skinnies, so that is impressive. Thing is, he had a giant cam with a giant stall, so it's hard to compare to my own car because I wouldn't be doing those two things.
I truly believe these heads would be worth a solid forty rear wheel horsepower give or take 2-3 either way and that should spell 3.5 plus on the trap gun but the velocity, port speed, mid range torquey-ness and all would be added butterflies in the tummy to justify your investment
