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PRC LS7 Small Bore Cylinder Heads Nears Production! 390cfm on a LS3 Bore!!

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Old 02-04-2011, 06:56 PM
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Old 02-07-2011, 10:52 AM
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It's just not as easy as you think just because a day is a target that it happens that day. It is way harder than that. We've had to make tons of revisions to the casting & the tooling to get the castings where they are now. What I can tell you is they won't be released until I think they're 100% right!

The good news is the rumor is the heads were being bolted on the engine dyno today.
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Old 02-07-2011, 04:08 PM
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Jason,
No one thinks its easy to come up with a quality product like the head will be. People in general are impatient. Everyone would rather you be happy with your finished product so it will proform like TSP products are known for.

With that said...... Hurry up. LOL
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Old 02-08-2011, 08:46 AM
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"The good news is the rumor is the heads were being bolted on the engine dyno today."

sweeet
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Old 02-09-2011, 05:18 PM
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They are on the L99 currently. Made about 42-43 hp over the LS3 heads with the FAST LSx intake installed. The combo really needs time testing on a bigger cube engine. For the LS3/L99 cars I really think we can get to that power level with the PRC aftermarket casting LS3 heads. For the 418+ guys this LS7 small bore head should be pretty sweet!
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Old 02-09-2011, 05:33 PM
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Is that power rating at the crank? What was the total? Stock cam?
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Old 02-09-2011, 05:35 PM
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Need to bolt those on a 416 LS3 as soon as you get a chance I'm building a 427LS3 very soon...
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Old 02-09-2011, 06:21 PM
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Originally Posted by Jason 98 TA
For the 418+ guys this LS7 small bore head should be pretty sweet!
Thats what I was thinking!!!
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Old 02-09-2011, 07:49 PM
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Originally Posted by Jason 98 TA
They are on the L99 currently. Made about 42-43 hp over the LS3 heads with the FAST LSx intake installed.
Is that stock LS3 heads and LS3 intake as the base or LS3 heads and Fast 102 as the base? Were midrange torque numbers up strong too? Was CR bumped over stock?
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Old 02-09-2011, 07:58 PM
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Yeah a sweet comparison would be on a 416 with your ported LS3 heads then switch to these. Both tests done with a fast intake 102tb and the same compression.
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Old 02-10-2011, 04:48 PM
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Originally Posted by Jason 98 TA
They are on the L99 currently. Made about 42-43 hp over the LS3 heads with the FAST LSx intake installed. The combo really needs time testing on a bigger cube engine. For the LS3/L99 cars I really think we can get to that power level with the PRC aftermarket casting LS3 heads. For the 418+ guys this LS7 small bore head should be pretty sweet!
How much total horsepower did it make by chance? It is making my head hurt, decisions decisions.
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Old 02-12-2011, 03:54 PM
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These heads sound awesome, I imagine these heads would work great with a blower. Can you post a video when you get closer to releasing these heads?
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Old 02-13-2011, 01:37 AM
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waitingto hear the result from Jason
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Old 02-13-2011, 12:36 PM
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I am curious on mid lift numbers too. not just .700
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Old 02-14-2011, 02:16 PM
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I wish these would work on a 402 LS2. These heads should be killer.
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Old 02-14-2011, 07:48 PM
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Originally Posted by Fifedogg
I wish these would work on a 402 LS2. These heads should be killer.
mast motorsport has u covered there...
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Old 02-18-2011, 05:54 PM
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Old 02-19-2011, 07:21 AM
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eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeerrrrrrrrrrrrrrrr rrrrrrr
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Old 02-21-2011, 07:13 AM
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Old 02-28-2011, 07:47 PM
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Did something go wrong with these heads?

Very interested in them, Just wondered if I should stay tuned or go a different route.
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