Supercharged111
Truly Awesome
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And the GenVI can still run the 049 heads.
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I need a gen 6 cam with ls firing order...(basically 8.1l cam).My machinist talked me into ditching the genV and going with a MarkIV block (stronger) and 049 heads for better airflow in the higher RPMs, although my cam designer has shown in his software that the peanut port heads make great power and torque down low.
I'm going with a stroker 496 for simplicity, around 440hp and just under 600ft lbs of torque. Final cam design isn't done yet but we're close.
If you guys want cam advice, I know a guy.........
I have the 270 in my truck, it's plenty of cam imo, for stock heads at least. If you're towing a ton, you might even consider a little bit smaller.So I've decided I am going to rebuild the engine and stroke it to 489/496. I think I will go with the long tube JBA headers, high flow cats, and Carven Type TR straight through mufflers.
With that being said I'm looking at these camshafts.
XR276HR and XR270HR.
XR276 224/230 @ .050 276/282 duration .51 lift 113 LSA
XR270 218/224 @ .050 270/276 duration. 51 lift
113 LSA
I feel I could get away with the 276 but the 270 might be better for me. Occasionally tow my snowmobiles and a 22ft Sea Ray boat. 3.73 gears. I also have a 0411 PCM. Just need to pin it and tune. Thoughts?
Sounds like you system is pretty close to what Im shooting for! How much different is it than when it wa na? How much cooler is a turbo sound?Turbo BB vs dmax just depends on what you want for efficiency. Dmax will get great mileage, but they're expensive and a lot of work to swap. Turbo BB will get OK mileage if you can stay out of the throttle lol The dmax will make more torque at lower rpm, and sustain it much longer, but if you're not towing a lot the BB will do fine.
My rear mount turbo is just a gt45, but it is definitely small for the application. I think the heat loss from the turbo being 10' from the engine helps out with back pressure though, and I'm also only running 5 psi. As is back pressure is around 2:1, which is obviously higher than ideal, but could be worse. The turbo I'm running was mostly to get the system up and going, I'll upgrade it to a s475 or s480 eventually, but I need more injector and a walbro 450 first.
Currently I have a walbro 255 and 36 lb injectors ( flow ~42 at 58 psi), the injectors are maxed out at 5 psi the 255 is keeping pressure up so far but I am probably close to the max.
If you aren't planning to go much above 500 hp a walbro 255 should be enough, and a set of 36 or 42 lb injectors should work.
Stock injectors won't support much, so don't plan to use those, and I wouldn't trust the factory fuel pump personally.
The turbo sound is awesome in my opinion. I'll have to see if it can get a video, but it's worth it.Sounds like you system is pretty close to what Im shooting for! How much different is it than when it wa na? How much cooler is a turbo sound?