Last 6 Speed Dyno- Our 383 LS Test Mule!
04-16-2013, 02:46 PM
#22
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Here is some testing we did a little while back of a stock shortblock 346. This is a comparison of stock 241 heads w/ stock Ls6 intake vs. our Stage 1 (As Cast) heads w/ stock Ls3 intake. Same cam was used in both tests.
HP Gain: +47.95
Torque Gain: +35.75
No loss in HP or Torque in any RPM.
HP Gain: +47.95
Torque Gain: +35.75
No loss in HP or Torque in any RPM.
Last edited by Ryan@BallisticSpeedParts; 04-16-2013 at 03:05 PM.
04-16-2013, 02:55 PM
#23
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We use a factory GM casting, then we modify to fit the smaller valve combo. Yes, with the combustion chamber volume and the excellent flow quality, these make for an awesome boost combo.
04-17-2013, 10:16 AM
#26
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Do you do any blending in the "as cast' version on the bottom of the new valve seats to match them to the ports, or is there a ridge or material which needs to be knocked off? Or is this all taken care of with the valve job? Thanks.
04-17-2013, 10:44 AM
#28
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Yes we do...each port to seat transition is hand blended and leaves a very nice transition that is better than factory. There is no work on your end needed, we send them to you ready to go.
04-18-2013, 03:45 PM
#32
Awesome heads here, I have been waiting for a thread with some results to pop up before i made a decision on what i wanted. Im definitely leaning towards the Stage 2 set for my winter build!
04-20-2013, 11:10 AM
#35
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Dammit! I just got rid of my 383... Lol
I was wanting this kinda set-up. But, Mast was too pricey. I hope you do well.
Ps.
The comparison post #22, were both combos sporting same exhaust at tune procedure?
Maxed or safe? Just wanting to clarify. The 379 seems a little soft for that cam, that's all. But, I understand all dynos are different.
Thanks in advance!
I was wanting this kinda set-up. But, Mast was too pricey. I hope you do well.
Ps.
The comparison post #22, were both combos sporting same exhaust at tune procedure?
Maxed or safe? Just wanting to clarify. The 379 seems a little soft for that cam, that's all. But, I understand all dynos are different.
Thanks in advance!
04-22-2013, 06:24 AM
#40
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Thats why I'm definitely leaning towards these vice my current L92 heads. Even with the 4.030 bore of the 408 I'm building, the factory size L92 valves are still shrouded rather badly. I'm also wondering if these are true aftermarket castings, or modified stock castings.