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I thought the truck one would be bigger too. I guess to know for sure would require doing the measurements to confirm the data.
I think one of the key features for plenum design is to get the correct floor design to reduce reversion while working with the intake wave harmonics to get the most air moved into the cylinders. Cam timing for valve events also plays a big role of course. Likely means a bigger or smaller plenum isn't necessarily better because it depends what set up the intake is being matched too. My guess is the curved floor of the LS1 intake is what really hurts it the most in NA applications.
One engineer that had worked for several big name companies told me, one can often be fairly accurate when experienced figuring out how to improve a cylinder head. Evaluating intake manifolds were far more challenging to design and improve generally speaking. He also said the eye was less reliable for evaluation of what might work with an intake manifold.
The Gm truck intake is a pretty unique design it does not really have a floor , just a roof or umbrella as I call it .the truck is a double plenum , don't know if they measured and included intake log that delivers to the roof and back runners I have not measured the truck but the log could be well over a liter just by itself.
I read through almost the whole post and this is awesome info. I have a peak speed ported TBSS that I haven't bolted to anything yet and would love to donate it to the test if interested. Shoot me a PM and Ill send it out.
I read through almost the whole post and this is awesome info. I have a peak speed ported TBSS that I haven't bolted to anything yet and would love to donate it to the test if interested. Shoot me a PM and Ill send it out.
I would be delighted to test the Peak Performance ported TBSS intake. PM sent.
I need to round up a LSXR to round out the testing.
I shipped the peak ported TBSS today and you should receive it on Wednesday. I PM'd the tracking number to you. Just for completeness this intake had the "radical 102" porting done as it is going on a stroker application. I wont need the intake until early April when I (hopefully) finish my assembly.
Looking forward to the results and thank you again for supplying all this great info.
That would be an intake to test! The change to the torque curve is amazing.
Would have to test that bad boy with a set of stock 241's, the Wegner 799's and the LPE GMPP heads.
Dual 102 mm cable TB's? Having a single 102 cable TB can be a challenge sometimes. If WS6 Store develops a way to run dual cable TB's with that intake, it could become an amazing bolt on for an LS1/LS6!
Last edited by 99 Black Bird T/A; 10-30-2018 at 03:19 PM.
08-06-2018, 02:17 PM
