ou812sm

iTrader: (16)

How much lift can you run on l92 before its not helping flow

midevil1

iTrader: (17)

I was running 61X on the intake and 62X on the exhaust. Your duration should favor the exhaust by at least a 10* split as with the lift. I think anything under 600 lift on a rec. port head is a waste of money...IMO.

Sales2@Texas-speed

iTrader: (5)

Just curious as to what testing or data you have done to support those statements. They are contradicting to the engine dyno testing we've done here!

midevil1

iTrader: (17)

[QUOTE=Matt@Texas-Speed;4799516]Just curious as to what testing or data you have done to support those statements. They are contradicting to the engine dyno testing we've done here![/QU

I have run Bullet and Comp grinds with this concept in the grinds. Both with great success. 496rwhp with the Bullet and 504rwhp with the one from Comp. Got a few grinds thru WEB that I have in the garage needing testing, but sold my test mule. This was all done on a 11.5 to 1 370ci. L92's were only lightly ported on the exhaust. Titanium valve train and ferrera in the heads. Stage 3 ported L76 with 92mm TB and 39lb injectors. Not interested in sharing my data. Just interested in enjoying it. Lots of capable minds out there doing coming up with GREAT results.....

I believe the TSP 1 7/8th headers are what made the difference though...

Sales2@Texas-speed

iTrader: (5)

Ever test back to back with less than 10º of split on the LS3/L92 headed combos? If you get the chance, do so! We've enjoyed the extra average power and torque under the curve as compared to the huge split stuff

ou812sm

iTrader: (16)

Ok guy so tell what's most lift u can use

skeet

iTrader: (18)

NA i run a 4* split nitrous i run a 10-12 * split, ive ran as much as 630 lift, my new and improved heads are good to 780-790 lift, will i ever run that? probably not unless i was solid roller right now ill stick around a 624 lift

midevil1

iTrader: (17)

So your average power and torque was better thru out the band? I ran a 226/230 grind and it was very disappointing..

OP, I would stick to the 620 to 630 range on lift. IMO.

Sales2@Texas-speed

iTrader: (5)

Average power has been better with less split, which is not surprising at all. With the extra split, we see a few extra HP at peak but it typically isn't until close to 5000rpm+ that you see it.

As for lift, retainer to seal/guide clearance is crazy and you CAN run over .900" valve lift on most spring kits. As for what you need, it somewhat depends on your intake manifold and heads. Stock GM LS3/L76 intake flows for crap and anything over about .620" or so, you don't gain any more real power. With an LS3 FAST (as much as people want to hate it) and a good set of ported heads that do not back up after .620", you can run more.

Cam selection has always depended on the entire combo, still does