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[VR] MAST 3.900 LS3 Heads/FAST 102/Kaotik Cam Picks Up 110rwhp On 383 LS1!

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Old 09-23-2017, 04:26 PM
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wow super impressive but I didn't even know that the LS3stuff would it on an LS1 ???
Old 09-23-2017, 05:12 PM
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Originally Posted by wannafbody
Are these stock LS3 castings or aftermarket? Is it the 11 degree angle that allows them to work on the 3.9 inch bore?
It's not the valve angle, but they do move the valve locations or "pierce points". I'm pretty sure these heads require Mast's custom rocker stands to use with stock rockers, which is a good indication the the valve spacing is different.
Old 09-23-2017, 07:40 PM
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Obviously, the Mast Small Bore LS3 heads are excellent and work very well with the Fast 102 LS3 LSXR & VR Kaotic cam.

I wonder how well a Radius Rod LS3 intake which flows much better than a stock LS3 intake would work with the Mast Small Bore LS3 heads & VR Kaotic cam.
Old 09-24-2017, 07:38 AM
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GMPP makes an ls3 castings that'll work on the small bore, but they're not nearly as good as the mast heads
Old 11-14-2017, 01:54 PM
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ttt...
Old 11-14-2017, 02:10 PM
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Nice little street combo! Those MAST small bore LS3 heads do deliver the goods.
Old 11-14-2017, 03:03 PM
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Originally Posted by redtan
The lack of low end torque people complain about is usually at part throttle driving around town where big *** ports with big *** valves on small bores (4" for example) can feel lazy. I don't think anyone complained that square ports don't make torque down low at WOT.

Second, those MAST LS3 small port small bore heads are not even on the same planet as a stock port stock valve LS3 head. Slap on a stock LS3 head on that bitch and you ain't getting anywhere near the torque seen in this dyno graph.

But keep spewing your agenda
My LS3 made 476 torque with my set up. Took E85 to get it there though lol
Old 11-14-2017, 03:19 PM
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Kick *** results! That thing should flat move out.
Old 11-14-2017, 05:40 PM
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Originally Posted by lazerlemonta
My LS3 made 476 torque with my set up. Took E85 to get it there though lol
That was with bolt ons?
Old 11-15-2017, 01:43 PM
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Originally Posted by big hammer
That was with bolt ons?
Correct Big Hammer. Bolt ons and 1.85 rockers.
Old 11-16-2017, 04:17 PM
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ttt...
Old 11-16-2017, 06:24 PM
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What is the Intake runner Length?
Standard?
Old 11-29-2017, 07:25 AM
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Old 11-29-2017, 08:53 AM
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Originally Posted by NAVYBLUE210
What is the Intake runner Length?
Standard?
I'd imagine. The mid runners haven't really caught on yet
Old 11-29-2017, 09:32 AM
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Originally Posted by big hammer
I'd imagine. The mid runners haven't really caught on yet
These Heads,Cam & CID are begging for the Mid-Lengths.
Old 11-29-2017, 09:49 AM
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Yes, it is using the off the shelf runner length in the intake.
Old 11-29-2017, 11:00 AM
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what would you get if you put that stuff on a stock ls1? have you done it?
Old 11-29-2017, 12:22 PM
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It would shift the powerband to the right. Less torque but if you spun it high enough, similar HP



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