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boost/pyro issues


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OK, so I've had the truck up and running for a few weeks now and I'm still trying to pin some issues down. Max boost is up to about 60-65 psi, pyro at cruising is running around 7-800 degrees. However, if I'm in 4th or 5th gear, running at a good rpm (tach is out so I don't know what the rpms are, I just know I'm not lugging it) and hammer down, pyro jumps to 1200 by the time I hit 35-40 psi. I've tried adjusting the fuel, preboost screw is almost all the way in, but even if I hammer down on it, all I get is a light cloud. Not enough to black anything out, not black at all, a dark grey. Now I'm not going for smoke, but I'm trying to figure out if I'm fueling enough to spool the turbos up quickly. Problem I'm having is it seems that its taking the turbos too long to get spooled. I'm running a super s300 (I'll have to look at specs later and post) over a s473 hybrid. 100cc over stock DVs, 5 k gov springs, DDP 140 injectors and running 16 degrees of timing. Truck is running kind of doggy compared to what I think it should be. Drive pressure is pretty close to 1:1, max boost is 60-650, while the primary is showing about 15. Any ideas? To me it seems like I'm not getting enough fuel, but the air dog is reading 40psi at the feed line into the pump.

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Turbos are 57/65/13 over 72/95/26cm

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I can't say about your pyrometer, but to light the turbos you need to have fuel. Fuel exploding (firing in the cylinders) is what drives them. Sounds like you need a touch more fuel to get things going.

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