CRP stage 4 build (lower than expected power levels)

[Guy]

Dillard,

This was Lars truck from Gearhead on 93, similar turbos. He hit the same wall. They have the upper RPM range cleaner than mine but it’s the same plot basically.

so I don’t know if there is any more torque to be had.

 

[dillard09]

Dillard,

This was Lars truck from Gearhead on 93, similar turbos. He hit the same wall. They have the upper RPM range cleaner than mine but it’s the same plot basically.

so I don’t know if there is any more torque to be had.

View attachment 158810

But was that torque curve at 500 max because of a stock motor? I guess I'm going to find out.

 

[Guy]

Not sure if Lars had manifolds or what other bolts on he did. Probably typical bolt ons is my guess but probably not manifolds. I don’t think he held back... he just was limited by knock.

maybe the heads pick you up a little something. Not sure if the flow will matter
With the knock.

 

[dillard09]

True. If its limited by knock it dont matter. Well I need to rattle off some more miles so I can go find out

 

[nikhsub1]

Guy - did you happed to dyno the truck on the same dyno BEFORE the mods? Dyno numbers are different so if you went to a different dyno, you are going to get different numbers. Maybe this dyno just is just very ungenerous? Dunno, just a thought because I usually laugh at folks who try to compare dyno sheets done on totally different dynos.

 

[Guy]

Yes.

baseline 367. 447 tuned. 411 stock tune with all bolts ons and turbos. 507 finished product and again all that power comes in the last 1200 RPM

 

[smurfslayer]

Stock sized KO2’s ?

 

[Guy]

Nope. 35s. Toyos. Not significantly different though.... even the shop said it’s not the tires.... no way you’re making up the difference for the inflated numbers.

4K rollers too so it has proper loading on the dyno jet.

it is what it is. I’m not saying it won’t take a tuned raptor in a straight line dig... it will... but it will not touch a TRX... and for that I’ll need another solution.

 

[NASSTY]

Sounds like you found the limit of pump gas.

 

[10SpdsOfFury]

it is what it is. I’m not saying it won’t take a tuned raptor in a straight line dig... it will... but it will not touch a TRX... and for that I’ll need another solution.