HX35 Hybrid Dyno Results

Big Blue24

Big Blue24

Comp Diesel Sponsor
Recently I've been playing with a 62mm compressor wheel and cover made by BAE turbo for the HX35. The compressor wheel measures 62mm x 86mm and features 7 blades, just like a regular Super 40 or He351 compressor only 2mm larger on the inducer.

I also drilled across the divider and opened up the wastegate passage a few mm's but otherwise, stock hot side.

The test mule is a 1997 Dodge Ram 2500 Automatic with a few hundred thousand miles on the otherwise stock motor.

5x.012" VCO 155* injectors
0.025" Delivery Valves
22* Injection Timing
Wastegated to 39 psi

461 HP Fuel Only
[ame="http://www.youtube.com/watch?v=vmojn-MpV6M"]http://www.youtube.com/watch?v=vmojn-MpV6M[/ame]


We then hit it with identical setup only adding a 75hp shot of nitrous.
Boost hit 45 psi with the same wastegate setting.

568 HP on N2O
[ame="http://www.youtube.com/watch?v=iPdTRq2EWHc"]http://www.youtube.com/watch?v=iPdTRq2EWHc[/ame]
 
For comparison my 1998 12 valve:

1998 12 valve automatic
5x.016" 145* VCO injectors
.050" delivery valves
21* injection timing
HX35 over HT60 Compound setup pushing 60 psi during the dyno run

520 HP Fuel Only

[ame="http://www.youtube.com/watch?v=EfIttQdMkQI"]http://www.youtube.com/watch?v=EfIttQdMkQI[/ame]
 
B. Jansen? Running on the dyno, I think it was somewhere in the 800 HP range, don't remember the exact numbers.

[ame="http://www.youtube.com/watch?v=PU-Ri26sQ5E&feature=youtube"]http://www.youtube.com/watch?v=PU-Ri26sQ5E&feature=youtube[/ame]
 
Gasoline Sucks said:
Nice runs!

Whats holding the head on the 97? I assume gov springs etc?
Click to expand...

Stock head bolts with copper o-ringed block, groove cut with an isky tool. The owner neglected to do a re-torque and eventually lost the gasket a few weeks later at the track. It was pushing coolant out the side of the block between #5 & #6 on the passenger side. This time around he prepared the block with stainless steel .041" wire and taking the stock bolts up to 145-150 ft/lbs, and will do a retorque after a few weeks. When it lost the copper oringed gasket it had comp cut delivery valves, 5x.012", 25* timing, racked barrels, rack plug, nitrous, and 50/50 water methanol. That's a lot of cylinder pressure for a non-retorqued newer gasket to hold.....

straight 6 roar said:
Wow 461 on only 39 psi. What makes it so efficient?
Click to expand...

It's that 62mm compressor combined with a well ported hot side and a functional wastegate. I wonder if it would have picked up a little more peak power with a tighter wastegate setting and 45 psi boost? We'll never know....
 
Got ya, WOW i need to bump my timing. I'm going to have to oring mine but I have a mill and plan on grooving the head since it will be off. Question is do I just bite the bullet and o-ring it before it blows or do I wait till it blows :confused:


How are the hx35 shafts holding up with the bigger wheel?

Thanks for the info
Kevin
 
Big Blue24 said:
For comparison my 1998 12 valve:

1998 12 valve automatic
5x.016" 145* VCO injectors
.050" delivery valves
21* injection timing
HX35 over HT60 Compound setup pushing 60 psi during the dyno run

520 HP Fuel Only

http://www.youtube.com/watch?v=EfIttQdMkQI
Click to expand...

Any graphs to compare power under the curve vs. peak power though? Nice to see the BAE upgrades doing well, might have to try one in the future. And X2 on the shaft handling the compressor question....
 
Sounds feasable....my truck made 433 on a non-wastegated hx35, 5x12's, delivery valve springs, mack rack plug, timing, etc. 42psi if I recall.
 
I had a customer we did tuning on a 180 pump with 215 injectors and a stock hx35 with a ported 12cm housing and did 448hp in 2008. Good job on your numbers. Hard work does pay off.
 
Do you have numbers for the '97 with the same setup and a completely stock hx35 to compare to? A graph to see the curve of your hybrid dyno results would be nice to see too.
 
Just for comparison sake I did 497hp a couple years ago with a 35/40 hybrid w/g @42psi 5x13 and full cuts on a manual tranny.
 
Does there need to be any machining on the backing plate? I'm thinking of a little upgrade on my hx35w and that would put me about where I want to be
 
logant said:
Does there need to be any machining on the backing plate? I'm thinking of a little upgrade on my hx35w and that would put me about where I want to be
Click to expand...

Yes, the machined step of the backing plate on the older style 94-98' HX35 is 84mm wide, this needs to be opened up to 87-88 mm to accommodate the 86mm backing plate on the 60/86 or 62/86 compressor upgrades.

If you have a newer style 98.5-02' HX35, it has a 79mm wide machined step and it needs to be opened up even further.

Places like HTT or Gillette Diesel sell a smaller 60/83mm upgrade kit that drops into the older HX35's they also offer an even smaller 58/78 upgrade kit that will drop into the newer HX35's but isn't a worthwhile upgrade in my opinion unless you have an HX40 laying around to pillage the compressor and cover from at no cost.
 
Bponci said:
I had a customer we did tuning on a 180 pump with 215 injectors and a stock hx35 with a ported 12cm housing and did 448hp in 2008. Good job on your numbers. Hard work does pay off.
Click to expand...


Do you remember what the timing was set at? Wondering if I can break 400hp with a 160 pump, 5x10s, he351
 
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