Over Spinning ProCharger

[Jcole_14]

Spinning to 72k, it will make like 850whp...

Also crazy to see that you made that number because they say they’re only good for ~700whp and making 850whp is much larger than advertised lmao.

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[andrewtac]

What kind of temp reduction you talking?

Meant to text you the other day. I did a third gear only pull. IAT was around 99 when I went WOT. It went to about 90 before the nitrous came in, then dropped another 10 degrees, then inwas out of it. Without nitrous similar hit dropped to 90 then climbed a little. I was on a 37 jet I think, should be close to 65 shot. I haven't really got to test much on it, but I have all the other crap worked out (heater, purge, controller, log files, and so on). It looks promising, but really need some time and hotter OATs to tell for sure. Either way when the built motor and YSI is in I'll be ready to turn it up. Though I probably will need a standalone fuel system if I go crazy with it. My fab guy got a 6 core bell in, hopefully that will go in soon as well.

 

[80FoxCoupe]

Also crazy to see that you made that number because they say they’re only good for ~700whp and making 850whp is much larger than advertised lmao.

Advertised is simply a guideline,, not the rule!

 

[Slow306stang]

I'm running about 90,000rpm on the F1a-94 with a 74,000rpm limit. It's what most class racers do when limited to blower size. In the event that mine fails I'll just get it rebuilt or buy a new one.

Like what @80FoxCoupe said, you are going to be spinning the head unit out of its efficiency range so it will be making heat.

 

[80FoxCoupe]

I'm running about 90,000rpm on the F1a-94 with a 74,000rpm limit. It's what most class racers do when limited to blower size. In the event that mine fails I'll just get it rebuilt or buy a new one.

Like what @80FoxCoupe said, you are going to be spinning the head unit out of its efficiency range so it will be making heat.

Yep, 84k here on my f1a94.

 

[Jcole_14]

I'm running about 90,000rpm on the F1a-94 with a 74,000rpm limit. It's what most class racers do when limited to blower size. In the event that mine fails I'll just get it rebuilt or buy a new one.

Like what @80FoxCoupe said, you are going to be spinning the head unit out of its efficiency range so it will be making heat.

Yeah completely understand. Just looking for a pulley to not blow the head unit lol. I understand heat will come when out of the efficiency range I just don’t want the thing to give out because it’s not a big unit. And I’d prefer not to need a new one for a while.

From what I’m getting at is a few 1,000 won’t hurt just increase temps. But if I’m wrong and I will run the risk of blowing it just correct me because I’m not super fimilair like you may be with prochargers.

 

[LSchicago]

Also crazy to see that you made that number because they say they’re only good for ~700whp and making 850whp is much larger than advertised lmao.

Procharger claims up to 825HP on the P1SC, and up to 950 on the P1X

 

[Jcole_14]

Procharger claims up to 825HP on the P1SC, and up to 950 on the P1X

At the engine not wheel

 

[LSchicago]

At the engine not wheel

I saw people hit both quoted numbers at the RW.

 

[Jcole_14]

I saw people hit both quoted numbers at the RW.

Gotcha

 

[LSchicago]

Gotcha

Even Procharger took a bone stock 18 GT, added a P1X stage 2 with fuel system and got 937RW with no other mods on a 3.7" pulley.

 

[Slow306stang]

Yeah completely understand. Just looking for a pulley to not blow the head unit lol. I understand heat will come when out of the efficiency range I just don’t want the thing to give out because it’s not a big unit. And I’d prefer not to need a new one for a while.

From what I’m getting at is a few 1,000 won’t hurt just increase temps. But if I’m wrong and I will run the risk of blowing it just correct me because I’m not super fimilair like you may be with prochargers.

You'll enjoy the increase of midrange torque from the smaller pulley as much as the top end horsepower. That small window where you're over the blower RPM limit wouldn't stop me from dropping the pulley size down.

Edit - Leave the 3.125 on and let it eat.

 

[Jcole_14]

You'll enjoy the increase of midrange torque from the smaller pulley as much as the top end horsepower. That small window where you're over the blower RPM limit wouldn't stop me from dropping the pulley size down.

Edit - Leave the 3.125 on and let it eat.

For my setup it’s out of the efficiency zone of the blower from 7300rpm to the 8,100 redline but made peak power at 7,800rpm. Just wanted to clarify and if you think that’s good just let me know. Thanks!

 

[Idaho2018GTPremium]

Question: Is spinning the engine faster (to 8100 rpm) but substituting in a larger pulley thus creating less boost at the same rpm as the current pulley actually beneficial? It seems the smaller pulley making slightly more boost but only spinning the engine to 7800-7900 rpm would make about the same amount of power as the larger pulley at 8100 rpm, but safer due to the lower rpm. Just something to consider.

 

[80FoxCoupe]

For my setup it’s out of the efficiency zone of the blower from 7300rpm to the 8,100 redline but made peak power at 7,800rpm. Just wanted to clarify and if you think that’s good just let me know. Thanks!

While that may appear correct in theory, smaller pulley = faster.

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