having 6.0L LQ9 forged...should I stroke it to 408?
#21
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I'm all about big inches but if is a DD and you are doing FI anyhow, i'd stick with the 370. It will do "enough", give better mileage & use less oil (possibly). For a reliable DD with minimal headaches and great power which is fun to drive my vote goes to a MP122HH and keep the boost at or below 12-13psi. This is coming from someone who has owned a Radix 112 as well as a custom front turbo on the same truck. The centrifugals have always intrigued me and work well but with your heavy sled you will get more off idle and plenty up top with a large roots.
#22
GFYS and STFU
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I'm with TurboGibbs on this one. I'm building a DD and was leaning towards a stroker 408 but Richard@WCCH made it clear that it will be less practical and have higher risk of breaking on me. I'm all for bigger cubes but not if I have to do maintenance on it. Not that a forged 370 can't break on you either though.
#23
Tin Foil Hat Wearin' Fool
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If you go with a S/C I would look into the KB blowers, getting a 2.8L would make great boost and also be able to handle a larger motor down the road should you decide you want another couple 100hp. Also there arent any blower manifolds out there yet for the L92 heads. I havent seen any results yet from teh 122 to make me think it is such a huge leap over old 112. The oil consumption issue averages about 1 1/2 quarts every 3000 miles, not too bad for the insane amount of off idle tq, I dont care how efficient the new radix is. Ask TurboGibbs how my heavy *** truck took off out of the hole, N/A!!!
#25
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Originally Posted by 1SlowHoe
383ci. Add 12-15 intercooled psi with a MP122HH or Turbo. Add 4L80E, Go fast. Save money for next engine.
What truck is this going in again?
Even a 6L @ 6psi has traction issues. How do you plan to put this power to the ground?
What truck is this going in again?
Even a 6L @ 6psi has traction issues. How do you plan to put this power to the ground?
#27
Staging Lane
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How loud is the procharger D1SC? Will the 370 and STS have enough low end grunt to help my pig off the line (especially with the lower compression for FI)?
Thanks a million guys!
Thanks a million guys!
#28
Tin Foil Hat Wearin' Fool
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I would go with Trick Performance's front mount kit for reduced lag and a 67mm, you can brake boost it and get 8#s and when you step on it, it wont be very much lag at all and will get that pig rolling. If you are really stuck on using the L92s it limits your choices alot since you knock out the manifold blowers. I would get a set of West Coast CYlinder Head stage II 6.0 heads and throw a KB 2.8 on there if it was me.
#29
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I went ahead, and bought the livernois 408 stroker RA from Lord Aries, so I guess that's the path I'm taking. $1800 shipped was a great price considering it retailed at $2495. I will keep you guys posted on how it goes.