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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 06-18-2018, 01:48 PM   #15
Nightflo
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@Nightflo



Pretty sure he means this. That was my dyno.

I'm on my 6th setup right now and was thinking of trying the C38 with the RS pulley. I don't know any public builds that have gone this route yet.
More than likely lol, hey where did you get your motor built?
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Old 06-19-2018, 02:04 PM   #16
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@Nightflo



Pretty sure he means this. That was my dyno.

I'm on my 6th setup right now and was thinking of trying the C38 with the RS pulley. I don't know any public builds that have gone this route yet.
You should do the RS! Your car is ready!
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Old 06-19-2018, 04:47 PM   #17
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What’s the diameter of the RS pulley?
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Old 06-19-2018, 04:58 PM   #18
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What’s the diameter of the RS pulley?
90mm IIRC.
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Old 06-19-2018, 05:14 PM   #19
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You should do the RS! Your car is ready!
I'm still breaking in the closed deck motor lol

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Old 06-19-2018, 05:24 PM   #20
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90mm IIRC.
Assuming the crank pulley is 140mm, that would spin the blower at 87,500 rpm at 7500. About as close to 90k as you can get, love it
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Old 06-23-2018, 11:40 PM   #21
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SPCorBUST, I'll be patiently awaiting to see your dyno. Are you going to be tuned by Delicious? With all the Jackson kits out there someone has to be going for big power and willing to post a dyno...
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Old 08-12-2018, 11:05 AM   #22
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My motor has recently been pulled and will have a pretty simple build done to it (street car). 12.5:1 pistons 86.25 bore, rods, bearings, full supertech valves/valvetrain (standard valve sizes), stock cams, and the setup will continue to use my JRSC C38-81 except I have the RS pulley and bracket to put on. Delicious tuning FF kit will be used for exclusive e85 use. My tuner has a mustang dyno, I will be posting my results on this thread in a month or so.
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Old 11-15-2018, 02:57 PM   #23
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If the RS pulley is 17 psi, would 10.5:1 compression pistons be good for 94 octane? I sadly don't have access to e85...
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Old 11-15-2018, 03:22 PM   #24
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If the RS pulley is 17 psi, would 10.5:1 compression pistons be good for 94 octane? I sadly don't have access to e85...
The RS Kit is a race setup. It is meant to be run with good fuel. Although, since you have dropped compression quite a bit, you should be fine with 94 octane. Just don't expect to see the numbers that a car with stock compression and E85 or race gas, makes.
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Old 11-15-2018, 06:52 PM   #25
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The RS Kit is a race setup. It is meant to be run with good fuel. Although, since you have dropped compression quite a bit, you should be fine with 94 octane. Just don't expect to see the numbers that a car with stock compression and E85 or race gas, makes.
Do you think i would make more hp compared to the high boost pulley (12psi) with the the stock 12.5:1 ratio? (btw if the calculator I used is right they have almost the same effective compression ratio)

While a lot of people who go turbo will often lower their compression ratio, most high hp (300+) supercharger builds use e85, so I was just wondering.
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Old 11-15-2018, 08:24 PM   #26
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Do you think i would make more hp compared to the high boost pulley (12psi) with the the stock 12.5:1 ratio? (btw if the calculator I used is right they have almost the same effective compression ratio)

While a lot of people who go turbo will often lower their compression ratio, most high hp (300+) supercharger builds use e85, so I was just wondering.
On the same fuel, probably a little bit more than a HBP with stock CR.
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Old 11-16-2018, 07:46 PM   #27
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@SPCorBUST or anyone else trying to make power on a Rotrex still waiting on a dyno. I'd be stoked to see anything over 350 whp on a non hub type dyno.
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Old 12-21-2018, 11:50 PM   #28
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@GrabTheWheel Just finished breaking in my new motor. Once back in my hometown in a week from x mas vacation the car is getting dropped off for the pulley, fuel system and tuning. I have 12.5:1 pistons and e85. My tuner uses a mustang dyno that I originally baselined at 153whp and then with 9psi pulley and 93 octane I made 255whp. Some say its a low reading dyno while I sort of think its accurate. But Im hoping and expecting to see atleast 350whp from the RS pulley. Im sure most dynos that are baselining more than 150hp will maybe hit that 400 mark but I dont think so on my tuners dyno. Either way based on my baseline if i make a 200whp gain over stock with the rotrex Ill be happy, regardless of what the exact number is.
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