[JSH]

The engine dyno is really the best way to test motors as it eliminates most variables, except Denver altitude (!). Of course the name shops only quote engine dyno crank or brake HP. On the other hand, no one here is going to pull their motor and drop it onto an engine dyno.

Originally Posted by Joshinator99

that’s a glory pull on a motor that’s not even in a car.

[JSH]

Does anyone make aftermarket thrust bearings for the LT4 that will live longer?

Originally Posted by radz28

because of the half-thrust bearing.

[KingLT1]

Main studs should be considered on the 1k + builds.

[radz28]

Originally Posted by KingLT1

It depends on the power adder. The big prochargers and PD units tend to beat the snot out of the crankshaft...and with that shitty half thrust bearing design anything over 850whp can be suspect to failure. Some of that will depend on tuning...if you keep the timing down in the mid range peak tq area to reduce torque on the hit, you can likely take them further. Turbo cars will go further since there is less parasitic pumping loss and nothing pulling on the crank. That is likely how LPE got 1400hp out of their SBE TT LT4 on a engine dyno.

Maybe the lower TQ in the lower RPMs I'm seeing on another car with a PD is a good thing then, lol. I've been trying to see if it will take a little more timing down low, but I think it's getting as much as it wants right now. Not that I'm stressing it much, but that's a good point.

Originally Posted by Camaro1973

Yeah for a street car that you want to last for many miles, best to keep under 900whp. After I add my chiller and race gas tune I’m trying for 850 which should be doable. Still on 14-15psi. Trying to drop 2 tenths lol

I bet it should get you there. After playing with the IAT Spark table, I can see the car will tolerate a little more timing, so there are gains to be had if you can keep the MATs down. The stock table was pulling a lot, but with that IC, I bet you don't have to start pulling timing from that table for a good bit.

Originally Posted by JSH

Does anyone make aftermarket thrust bearings for the LT4 that will live longer?

You have to machine the block and main cap for it. TSP does it in their stuff I think, so the bearings much be out there. I think LS-bearings are at least similar, if not the same, so maybe that's what's being used to correct this issue.

[swisstyphoon]

Originally Posted by JSH

Does anyone make aftermarket thrust bearings for the LT4 that will live longer?

King LS Style Bearings were used in mine, they fit without machining.
Other LS bearings require machining the block and main caps as already mentioned by radz28

[Slvr-camaro15]

Hello , sorry to seem like a noob , but new zl1 owner here . Was wondering after reading a lot of the Threads, what is a safe and reliable way to get to Around 750whp and if anyone who is running those numbers would care to recommend a shop that will Get me there .

[arpad_m]

Originally Posted by Slvr-camaro15

Hello , sorry to seem like a noob , but new zl1 owner here . Was wondering after reading a lot of the Threads, what is a safe and reliable way to get to Around 750whp and if anyone who is running those numbers would care to recommend a shop that will Get me there .

I'd consider one or more of these options: https://jannettyracing.com/pages/sea...mance+packages