always look at your gauges!!!!!!!!!!!!!!!!!!!!!!!

 

Ha, well if you look at the bottom right round one, that is an exhaust pressure gauge (0-50psi I think), and it looks like I have close to 10psi of exhaust backpressure. I am still using the small headers, 4" muffler with full exhaust, and home made 3" y pipe.

 

Nice passes! The nitrous works! lol

when you are spraying through the spray bars are you also injecting through a nozzle? Do you run meth at all times? The truck sounds awesome. 10 PSI of backpressure is hurting you for sure! You get that sorted out and this cam will LOVE more RPM. Your second gear shift is really low just as you said, thats too bad!

Hey, nice sunglasses BTW. I love Costa's. I have the same green mirror lenses... they are the best.

 

There are 2 rails for the spray bars, one for fuel and one for nitrous. Im not injecting meth anywhere other than the spray bars. If my pressure transducer had been working correctly I could get a good idea of what the post-solenoid fuel pressure is and go from there in terms of jetting and if it could support another nozzle somewhere. The meth only comes on with the nitrous now.

I have those dual 3.5" cutouts sitting in a box as well, just haven't gotten around to it.

Yea I really like the costas and how wide they are, ive had these for years.

 

In your spray bar test video you say there is 15PSI testing it. Does that mean 15PSI of pressure in the spray bar or does that mean that is how much meth sprays when the manifold sees 15PSI? Just curious.

So you're on pump gas only on the street... how much timing are you able to get away with?

 

That's 15psi fuel pressure at spray bar inlet in front of the jet, after it is something less obviously.

Yep, pump 93 on the street, same timing just without nitrous or meth, about 17 degrees. I could probably get away with more but no need or want at this point. I didn't pull any timing with the nitrous, I just let the meth handle that.

 

Is the log of the short shifted 2nd gear pass? Converter seems really loose with a pretty high shift extension for a pd blower setup.

 

Yea that was the short shift. The converter is the exact same one I had with the turbo. Its down to around 7.5% by 6000rpm which is pretty good.

 

What a great project, nice job!

 

Haha. That makes me laugh.