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Stock HP -vs- Turbo HP

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Old February 20th, 2010, 07:17 AM   #1
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Stock HP -vs- Turbo HP

What is the stock HP of a 08 RZR 800? Does anyone know what the HP would be if it was turbocharged running 4 to 6 lbs boost, 10.5:1 comp, 110 race gas? Or evn if I shimmed the head with a 1.5mm shim to drop the comp ratio and increased boost to 10lbs, what kind of HP do think it will make?
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Old February 20th, 2010, 12:12 PM   #2
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Re: Stock HP -vs- Turbo HP

Well stock is about 50 HP at the crank and 35 at rear wheels.
The MCX kit doubles the RWHP or more with 11psi and a shim.
Aerocharger gets about the same power with no shim and less boost but you have to run race fuel.
I would guess you should have around 80 HP at the crank with the numbers you asked about. The race fuel won't create HP, but it will help prevent detonation.
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Old February 20th, 2010, 12:25 PM   #3
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Re: Stock HP -vs- Turbo HP

Speaking of race fuel, there's a thread on GlamisDunes.com saying good ol'e California is going to ban race fuel for anything but true race cars. Wonderful!!!
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Old February 20th, 2010, 01:23 PM   #4
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Re: Stock HP -vs- Turbo HP

That figures!
I bet Torco sales would go up!
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Old February 20th, 2010, 04:54 PM   #5
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Re: Stock HP -vs- Turbo HP

The air ports will see an increase in AV fuel sales
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Old February 24th, 2010, 10:51 AM   #6
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Re: Stock HP -vs- Turbo HP

Quote: Originally Posted by Tuf-Skin View Post
That figures!
I bet Torco sales would go up!


TORCO! haha where have you been. Evan Knoll went belly up two years ago or so. I imagine within 2 more years he will be in prison, for tax evasion, among other things. He really shafted the drag racing community, which I am a large part of. I do believe someone bought the rights to the torco name. But last I heard that was a flop as well.
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Old February 24th, 2010, 01:41 PM   #7
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Re: Stock HP -vs- Turbo HP

Quote: Originally Posted by tylera189 View Post
Quote: Originally Posted by Tuf-Skin View Post
That figures!
I bet Torco sales would go up!


TORCO! haha where have you been. Evan Knoll went belly up two years ago or so. I imagine within 2 more years he will be in prison, for tax evasion, among other things. He really shafted the drag racing community, which I am a large part of. I do believe someone bought the rights to the torco name. But last I heard that was a flop as well.
Are you saying Torco is no more??? I had 2 shipments of there fuel accelerator to me last summer, it seems to be a good product and so far has worked for the turbo app.
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Old February 26th, 2010, 05:21 PM   #8
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Re: Stock HP -vs- Turbo HP

MPI supercharger kit makes 35 hp stock and 75 hp on 7-8 psi on pump gas


Torco is still in buiness and have been for years.
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Old February 27th, 2010, 06:09 AM   #9
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Re: Stock HP -vs- Turbo HP

In my understanding is that you can only acheive a maximum of 70% (if perfectly matched system) of the stock hp. 35hp + 24.5hp(70%) = 59.5hp.....do I have false information? Can a turbo acheive more than 70%? If the system isn't perfectly matched than there is a decrease in %.

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Old February 28th, 2010, 06:46 PM   #10
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Re: Stock HP -vs- Turbo HP

Quote: Originally Posted by bngcustoms View Post
In my understanding is that you can only acheive a maximum of 70% (if perfectly matched system) of the stock hp. 35hp + 24.5hp(70%) = 59.5hp.....do I have false information? Can a turbo acheive more than 70%? If the system isn't perfectly matched than there is a decrease in %.
A turbo can and will most definately achieve more than 70%. Think of it this way, and this is not perfect but close. For every extra atmosphere you create with the turbo, your power output will double. So if you have a turbo on your car and it is fueled and timed correct you should almost double the HP with every 14 lbs of boost. Turbos have compressor maps that tell you what there sweet spots are at certain pressure ratios. You could run 100 psi boost if your motor would hold it and the turbo, and fuel injectors were sized properly.
That would be over 6 times the NA hp number.
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Old February 28th, 2010, 08:16 PM   #11
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Re: Stock HP -vs- Turbo HP

My bone stock RZR-S did 43rwhp on the dyno.

With the MCX Turbo Stage 1 and a ported head on pump gas it did 103rwhp and 86rwtq.
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Old March 2nd, 2010, 04:03 PM   #12
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Re: Stock HP -vs- Turbo HP

Quote: Originally Posted by 4Nines View Post
My bone stock RZR-S did 43rwhp on the dyno.

With the MCX Turbo Stage 1 and a ported head on pump gas it did 103rwhp and 86rwtq.
i am doing the same thing now stage one with ported head with bigger valves,
this after my pistons blow up and i am rebuilding the engine. dont ask me how that happed , was loseing alot oil from the breather and then engine died.

so now i am doing it with ported head, big oil cooler with fan, and intercooler with fan.

lets hope it holds up.

btw what psi did you use to get 103rwhp. i got 63hp on 10.5 psiwithout the ported head.
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Old March 2nd, 2010, 04:16 PM   #13
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Re: Stock HP -vs- Turbo HP

Quote: Originally Posted by saqer View Post
Quote: Originally Posted by 4Nines View Post
My bone stock RZR-S did 43rwhp on the dyno.

With the MCX Turbo Stage 1 and a ported head on pump gas it did 103rwhp and 86rwtq.
i am doing the same thing now stage one with ported head with bigger valves,
this after my pistons blow up and i am rebuilding the engine. dont ask me how that happed , was loseing alot oil from the breather and then engine died.

so now i am doing it with ported head, big oil cooler with fan, and intercooler with fan.

lets hope it holds up.

btw what psi did you use to get 103rwhp. i got 63hp on 10.5 psiwithout the ported head.
Are you running the MCX display? It sounds your AFR's were off when you were dynoing.

I did the 103rwhp at about 12 psi. My tuning was dead on about 11.5:1 and I have never had a motor issue, but I keep my AFR's pretty low.

The only other thing I can think of is that I did have a dynatek ignition installed as well. This might have been good for about 5 to 10 rwhp.
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Old March 2nd, 2010, 04:33 PM   #14
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Re: Stock HP -vs- Turbo HP

i am useing the 63hp as a bass to see how mush hp i will gain.

i will do same fine tueing to rfr when i get it dynoed agine, but frist i need to break in the new pistons.

and up the boost to 11. hope to get 15-20 hp fingers crossed.
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