Htt 62/12

N

nate

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I was wondering what the max boost psi is for the S300. A 62/12 in this case..

Like with an HX35, most guys say 30-35 psi is about all it can handle.

I have mine set to ~35psi for the time being since I don't want to get crazy without headstuds.
 
I wouldn't be afraid of 55psi out of the charger. I would wastegate it around 46-48. They are very stout!
 
my 62/14 is gated the same way at about 36psi, could go higher but it does really good right now and i havent had anytrouble so i guess i will leave it. what are you really going to gain from 5-10 more psi?
 
cm cows said:
my 62/14 is gated the same way at about 36psi, could go higher but it does really good right now and i havent had anytrouble so i guess i will leave it. what are you really going to gain from 5-10 more psi?
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my guess would be hp, no?
 
Yeah that's what I'm asking. What is the highest psi the turbo can run without heating the air too much?

From what I read, most people seem to agree that 30-35 psi is about it for the HX35.
 
Hey Nate, I seem to recall that we were both shopping for turbos at about the same time and you went with the HTT 62 while I got an SPS 62 from II...I run mine gated at 45psi (no studs yet either). And I used to keep it at 40psi, but the difference in that 5psi is astounding. I used to run the HX35 up to 39psi at times and it was deffinately not good for it. The SPS feels like it makes TONS more power at 20psi than the HX at 40psi, it just flows sooo much more air and the drive pressure must be far lower. just my experiences
 
nate said:
I was wondering what the max boost psi is for the S300. A 62/12 in this case..

Like with an HX35, most guys say 30-35 psi is about all it can handle.

I have mine set to ~35psi for the time being since I don't want to get crazy without headstuds.
Click to expand...

The hx35 is most efficient at around 20 lbs a boost and will handle 35 lbs before superheating the air. The s300 is most effecient around 32 lbs of boost and will handle 40-45 before superheating. These are ballpark numbers but I think this is what you were looking for.
 
Talked to Dave at HTT and thought to ask while I was on the phone with him. He said the 62/12 is effective to 45psi and it can handle 70psi, though it will overheat the air for sure at that point.

That is right in line with what Ph4tty is saying.
 
Not to steal this thread, but if I want to run my hx 35 for now (until i save enough pennies to buy another turbo), should I wastegate mine at 35 psi then. I am running a drag comp, and smarty w/ jammer 4's. I know i need more air, but I just cant afford it right now. Wastegating it would save me a head gasket to. Just a thought. Thanks.
 
I ran my 3rd gen turbo to 42 psi on the dyno and hit 499.2HP. Seems like all of these numbers are within 10%. Also note, the 3rd gen has a 60mm compressor, the HTT has a 62 but larger turbine wheel, and Silver 62 took even less boost but it has a 74mm turbine wheel so it's exhaust side was freer flowing and more efficient at creating shaft HP from the exhaust flow.
 
Reading on the Snow webpage a guy could just use the windshield wash tank... is that big enough?
 
I think it spools better than the stock turbo, though I'm sure the Mach 4s have something to do with that.
 
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