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You guys are talking about matching boost vs. rpm numbers with a/f ratios.
We didn't write the tune or fuel maps, Hemifever does that through SCT. Ram guys have been putting Novi 2000s in 4.7Ls for a couple of months now. Their problem is they couldn't figure out how to keep the boost at a safe range throughout all RPM levels and actually have their rev limiter set to 5200 rpms so they don't push more than 14psi of boost. Travis and I have set his up to hit over 6grand and still keep the boost under 14psi so his setup works like a turbo with a boost limiter. He hits max boost at a low RPM and holds it throughout the upper RPM range.
Originally Posted by jkeaton
what does it do for HP gains?
Around 180-210 horse power. Every pound of boost produces about 15 horsepower and he will be pushing 12-14psi throughout all RPM ranges past 3,500rpm.
Was there a reason for doing a cam with a bigger lope than Blown? Because it definetly makes the truck sound sick!
He wanted to get the closest thing a 4.7L SOHC can get to a cam thump. It sounds great also, I love the way his cam sounds. Mine is a Turbo grind so its designed to metabolize boost faster and create more power per psi of boost.
How did you guys acheive this? Some sort of wastegate on that bleed excess pressure from the charge pipe?
It's up to Travis if he wants to say as I'm sworn to secrecy on his build. 100s of 4.7L guys have been trying to solve the riddle and we did it. I dreamed up the idea and how to set it up, he researched and found the perfect parts.
The Novi2000 on a 4.7l with its stock 3.5" drive pulley pulls down around 18 psi at 6,000 rpms. Once we have everything locked in, Travis will hit 12psi at around 3,500 rpm and hold it trough all rpm levels. One of the best parts of the turbo we have achieved with a blower setup.
I really need to open my own performance shop, lol.
Originally Posted by lmrjason
can't wait for y'all to get on a dyno after its finished being tuned so we can get some real numbers!
October 1st, I'm having my solid motor mounts fabricated and I will be going back to the dyno. The only reason I haven't is I keep braking the vulcanized rubber section of the mounts. Not to mention 8 grade header and flange bolts. Mine will be around 400rwhp and Truckys will be close to it. I'm thinking Probably right around 370ish rwhp due to 4wd.
Last edited by Blown287; Sep 24, 2010 at 08:05 PM.