The other day hauling 2800 lbs of scrap metal on my truck and a trailer.. uphill 45 mph 4th gear 15-20 lbs of boost.. I wanted to see what the H1C with my PODS would do. I put it to the floor and the pressure bounced to 40 lbs and stayed there.. the truck stated to take off like a rocket,I let off when I hit 900f on the pryo.. my question is has there been somebody else who's hit 40 lbs or more? With an unmodded H1C?

 

I think if your making that much with it unmodified your at risk of over spinning it.

 

I can make close to 45 with mine I never had a problem.

 

I hit like 36psi with mine...I think having a large exhaust housing helps...

 

I've never been past 33. Head gasket is ready to let go at 40. Careful there bud.

 

I was getting 56 PSI on mine until I bumped the timing 1/8" and that dropped it to just off the end of my gauge on a hard jump on the freeway, but I also have the HTT upgrade.

Jim

 

ok that helps as to what im looking at doing next....maybe a he357?

 

he351 you mean.

 

yep that one theres also a he 351ve right
?

 

Yes there are two different ones, he351CW and he351VE

 

I remember Pulltilbroke telling me some time ago that he hit 55psi with the baby (50mm) h1c. I can bet that only happened at time or two before he upgraded. Anymore than 35psi for something in that size-range is just blowing hot, inefficient air.

My hybrid, Super 40/35 pushes no more than 37-38psi at WOT with the wastegate disconnected. At that point, drive pressure must be opening the wastegate for me, which is good! It pushed about the same with the set of 4x.014s I ran before the 5x.012s I have now. I can't recall how high I pushed my baby h1c, maybe into the low 30s, as I had very little mods done while running it and honestly didn't really turn up the pump until early last year.

 

I'm running an H1C/HTT stage IV upgrade and I get a lot of needle bounce on anything above 38 pounds. I have seen 42 pounds max in an empty truck with a little help from the liquor cabinet.(H20/meth)

 

hello
Yes there are two different ones, he351CW and he351VEis
what is the difference? Is it in the waste gate or the compressor 14mm vs 16mm ?

 

He351CW is a fixed turbine housing. The He351VE is the VGT turbo that comes on the 6.7L Cummins.

The sizes you're thinking about are typical sizes of the turbine housing scroll only rather than millimeters, it's measured in square centimeters cm2.

 

I can hit 40 PSI (which is a lot for this altitude) with my Stage IV H1C, but I think my head gasket is blowing snot bubbles at 40.