Right now I'm in a spot trying to see what I should change the jets to or leave them alone. My motor is is an LS1 347 honed to 3.905, blueprinted, and decked a couple thousanths of an inch. The internals are Diamond Forged pistons with thermo coating and 7 cc valve relieves, Eagle H beam forged rods, federal mogul bearings for the internals. The heads are 98 ported heads that have been o-ringed, ported, and have double valve springs. The cam in the car is a Thunder Racing 236/230 .602/.575 112 LSA. I'm about to go get it tuned on a bigger shot (I think) Right now it has jets in it for a little over a 125 rwhp shot. I'm using a NX Dual Nozzle kit atm. I have logged some passes and im not getting any knock even though I'm at 31 degrees of timing. But when I get it tuned on the dyno I'm going to go with a more safe nitrous tune. I'm wanting to get the most possible out of this car. What should I safely bump the jets up to?

 

bump em

 

Sounds like you have the right parts to go a little bigger.

 

You'll be able to run a 150 shot no problem. Go for it.

 

I'm not seeing any mention of fuel system? That needs to be addressed to.
Hawk

 

Good point hawk.

 

Are you running this with pump gas and 31 degrees of timing? Just curious.

 

drop the timing, bump the jets

 

Right now the fuel system is stock injectors and a Walboro 340 pump so fuel should be alright?

 

i would prob say get sum injectors just to help out

 

Yes currently that's what I am doing... I'm getting no KR at all though. But am scared to up more then a 125 without pulling timing.