Fuel Tuning Question...

[Tyler_Baker]

For Reference: 2GMAS, 450's, 14B@15psi, FP @ 37lbs, SAFCII, APFR, 255 Rewired. Rest are in profile.

Here is the second gear pull

Here is the third gear pull

Still have a little knock 1-2 counts, but my DC is at 110% from about 4K-7K. Now the question is, will I be better off increasing my base FP in an attempt to lower my DC to gain more timing. If I can sucessfully lower my DC a good amount, I could run more boost which would be ideal. Let me know what you guys thinks. TIA.

 

[Violater101]

If it was me, I would be turning the boost down. Even though your talking about increasing your FP, your still going to be dangerously low on fuel. You need to definately need upgrade your injectors before you turn up the boost anymore imo.

 

[Tyler_Baker]

Originally posted by Violater101
If it was me, I would be turning the boost down. Even though your talking about increasing your FP, your still going to be dangerously low on fuel. You need to definately need upgrade your injectors before you turn up the boost anymore imo.

Well my RC 550's are on the way, I'll keep my boost at 15psi for now. So in your opinion, would you increase fuel pressure to try to lower the DC or not? 110% DC is definetly robbing some timing.

 

[Violater101]

Anything over 100% is a bad idea. If you insist on keeping the boost that high, then definately turn up the Fuel Pressure some. I would just turn down the boost till you get the 550's in.

 

[kpt4321]

If you add timing you will probably get knock, considering it appears as though you are right on the edge of it now.

 

[Tyler_Baker]

I cranked up my base FP, 60 psi without the vacum hose, and 45 psi with it on. I was correcting 39% at full boost before, but now I am only correcting 19%. Now my DC are at 87-89%% all the way through each gear. One count of knock was the highest throughout both pulls. Take a look at the new logs.

Here is second gear

Here is third gear

I believe I gained some timing by lowering my DC, pulling 21 degrees at the top of third now. My boost was spiking from 17psi back to 15psi. I really want my 38mm gate, so I can eliminate my spike problem.