Logging the pressure is usually the best way.This is on an elise with 550 injectors and a walbro 255 fuel pump. I'm having some audible detonation on wot in high rpm, and I'm trying to rule out the fuel system.
The 2ZZ has a fixed FPR in the fuel tank and is a deadhead system... So with a wally 255, it will idle at ~50-52 and drop ~5psi at the rail with the stock fuel system and 275whp at redline.If the pressure at idle is ~50, then what should the pressure be at boost?
No worries, I didn't mean to offer a new tune. I don't have any VF tunes to offer. I was just going to look at what I had on file and study the spark and fuel curve they are using to see if it might be more likely a tune that's just on the ragged edge in a car that's "ping happy" or if a hardware issue may be more likely... By all means, you should go back to your vendor:up:Car is an 05. I appreciate the offer, but I think at this juncture I'm going to try to get Jermaine to find some time to fly out and do a dyno tune on it. I've always been pleased in the past with my vf2 kit and hope to get this one straightened out also.
I may be interested down the road in a tune from you guys. I've seen where you integrated an air temp sensor post intercooler and I do think that would be a significant advantage.
Part of me thinks that I may be just getting used to the sounds of the new set up. I felt that I heard something and backed off. But, I've also upgraded to a decat and one of your silent touch mufflers, and the sound of that when the second cam comes on is very loud. Almost like an exhaust leak. I could have attributed some new noise to being detonation. I've built several cars, but I don't consider myself to be an expert or anything. Just trying to be precautious.
Sounds about right... The idea is that exhaust is mild enough for the DD but will still bark at your neighbors when asked to...That's very generous of you. I would really appreciate that if you have the time and wouldn't mind taking a look. Any advise is helpful.
On the subject of second cam exhaust note, does my description sound normal with the silent touch and a decat? Very deep and controlled on the first cam, and almost like a straight pipe on the second cam.
2-1/2 bar (37 psi) seems pretty low for a dependable system.The 2ZZ has a fixed FPR in the fuel tank and is a deadhead system... So with a wally 255, it will idle at ~50-52 and drop ~5psi at the rail with the stock fuel system and 275whp at redline.
Not saying this is ideal, but it's how 99.5% of the FI'ed 2zz Lotuses are out there...