Allright, I'm back in the game, the truck is running again with a transmission swap thanks to J&H Performance.

Old combo:

6x16s
Scheid 14mm VE
62mm S300
727 w/Goerend converter
c.12-14 deg of timing
two-stage nitrous (.099 and .135 jets, no bottle heater)

New combo:

6x16s or 6x18s
Scheid 14mm VE
62mm S300
47RH
c.22-24 deg of timing
three stages of nitrous (capable of .125, .157, .157 with bottle heaters)

If that doesn't crack 600, I don't know what will. I'm hoping for 700, but wise enough to know not to bet on it at this point.

 

JQmile you are not running the gv/od anymore?

 

Not at the moment....thought about going double OD in the future with some DDP injectors to see what happens with the mileage....

 

And fuel only about 348hp? lol

 

The difference between the overdrive gearing in the manual tranny, and the OD in the 47RH was pretty noticeable. I don't even lock mine in od unless i'm going 70 min on flat ground. It's just not quite enough rpm to be happy. My chargers are a bit laggier than yours though.

You're not a nitrous junkie Bill? I was beginning to think my truck was the only one that didn't come with it from the factory.

 

Nah, I'm hoping for about 400-450 on fuel which I think is OK for a single 62.

 

Less hoping..more dyno and track time already!

 

this.

 

x3

I'm trying, I'm trying!

 

Maybe we could run in the same lane with a tow strap. Might get your 1/4 mile times down.
Good luck on the dyno. I hope you see some improvement.

RonA

 

Thanks Ron. Hey, on a side note, have you seen any mpg increase or decrease by going to larger/smaller turbochargers just tooling down the freeway? I know you've had a few sets on the truck.

 

With twins, yes. I had best mileage when i was running about 8psi down the road and they would come up quickly from a light. Seems to require less pedal in town and I could get around 21 to 21.5 hwy. Larger twins definitely take it down a bit. I run around 17.5 combined now and about 18-19 out on the highway with these twins(GT4094/Gt55), 13mm p-pump and 7 x .013 injectors.

 

So the theory being that with some extra boost at cruising speed the engine could make enough hp (say about 50 hp) to get down the road and run leaner than it otherwise would in a bigger turbo/no boost situation?

 

Just found out the pump was accidentally installed a tooth retarded, so that 356 fuel 514 nitrous was with about 4 deg of timing.....jumping two teeth from where it was at.

 

Holy smokes! You should pick up a few ponies there! I hate when I don't double check something and it bites me in the rear. Check and re-check--advice from the Department of Redundancy Department