natlchamp2k4

Im just doing some thinking out loud. The goal for this truck would be 500 hp, very streetable, and used for moderate towing (15K once a month). I would never see the strip or the sled. Im pretty sure the twins would flow more top end but I think the spool of the ps62/helix 2 would rival that of a HX35. I dont think I would do springs for the sole reason that I would almost never see anything more than 2700rpms.

Another big thing I think I would like about the ps62/helix 2 would be economy, It added 2 mpg across the board in a deiselpower mag article, hwy, city, and towing.

My power adders would be a comp, and 150hp sticks.

I think in the end the total out of pocket expense would be within +/- $200 of each other.

judge88

a 62 will not even come close to a 35/3b as far as air goes. however a 62/helix will spool real close to stock and support 500 hp. not sure a towable 500 hp though. probaly have to turn the boxes down and just run off the sticks. orings are a must with twins compared to the 62 you could get away without them if you keep boost at 40 or under. imho i wouldnt do a helix 2 without springs no way no how. regardless of rpm.

BigBlue

I agree. After doing some reading and researching and see evidence of what stock springs do at high boost levels (50+) I believe that springs are a very good idea on even a stock cam. Rjohnson picked up I believe it was 6hp/130tq just by swapping springs with a stock cam on his truck. Also, I'm at 500hp with a 62/12 and I can still hit 1500*. Now granted that's at 90mph with my foot on the floor but I can't imagine how hot it would get and how fast it would get there pulling 15k. The twins will definately cool better than the 62/H2 setup.

natlchamp2k4

Well, just thinking out loud. I figured the twins would be better but trying to think of different things.

I probably should have clarified that the comp would be on 1x1 for towing. Not that it matters.

thekidfan

Twins are the way to go, so why not use a S-300 as your top turbo with the 3b? Then as time/money allows add the cam. Shoot run studs and keep the boost down and wait on the O-rings as well. Just a few options

PourinDiesel

Dude get the Cam no matter what.

Comparing Cam to Twins is apples to oranges.
Both have some of same benefits but are totally different animals.

Mike Holmen

I can't believe that you would lose 1-2mpg from a turbo change out and cam. Twins will help abit lowering fuel mileage but nothing huge. A cam might add 1/2mpg but I bet that it would be hard to determine the improvement. Twins as for the turbo. The 35/3B is a good combo for a 500rwhp truck. You might even try a smaller 3B like a 22cm. The typical 26cm housing for a HTB-3B is cooler (egt wise) but is a bit laggy.