supercharger or turbo ?? help

[Bum7272]

I want about 200+hp for trail riding on pump gas. What do i have to do. turbo or supercharger and which one
power lites bander or mpi and i trail ride hard about 3000 miles a year need something to hold up i have 2003 rx1

 

[Ted Jannetty]

I want about 200+hp for trail riding on pump gas. What do i have to do. turbo or supercharger and which one
power lites bander or mpi and i trail ride hard about 3000 miles a year need something to hold up i have 2003 rx1

For 200 on Pump gas you will need to go to a turbo at 7 psi.

It will take 9 psi to make 200 on supercharger that the pump gas won't support 9 psi.

Poweder lites or Northeast turbo.

 

[BlueMax]

MPI is saying 200 + at 7 PSI with their supercharger on premium pump gas. Ted are you saying this won't happen?

 

[Ted Jannetty]

I don't believe it because of simple physics, it takes 7 psi to make 200 hp on this motor less the drag on the supercharger and running gear.

138 x 1.45 = 200.1 less supercharger drag maybe 5 to 10 hp.

I guess if you start with an apex it would just make it.

148 x 1.45 = 214.5 less supercharger drag.

This is all if you don't lower the compression at all like adding a head gasket.

Now if you get a bad batch of fuel it's all over.

My calculations show 96 octane is needed with 7 psi and stock head gasket.

Now if you add a head gasket you can run 9 psi on 92 octane at 217 hp.

Ted.

 

[BlueMax]

I don't believe it because of simple physics, it takes 7 psi to make 200 hp on this motor less the drag on the supercharger and running gear.

138 x 1.45 = 200.1 less supercharger drag maybe 5 to 10 hp.

I guess if you start with an apex it would just make it.

148 x 1.45 = 214.5 less supercharger drag.

This is all if you don't lower the compression at all like adding a head gasket.

Now if you get a bad batch of fuel it's all over.

My calculations show 96 octane is needed with 7 psi and stock head gasket.

Now if you add a head gasket you can run 9 psi on 92 octane at 217 hp.

Ted.

Thanks Ted,

Yes I was looking at a Apex getting 200 HP with SC. So the only difference is the HP loss of the system (SC vs turbo). Is there an advantage to the turbo due to the turbo reaching max boost before supercharger. The supercharger will not reach max boost until max RPM. Thanks again for being such an open contributor on this site. By the way, I am not doubting anything you are posting but I am very interested in your opinion on this subject. I also understand one mistake on either system and your engine will be toast.

 

[Ted Jannetty]

Thanks Ted,

Yes I was looking at a Apex getting 200 HP with SC. So the only difference is the HP loss of the system (SC vs turbo). Is there an advantage to the turbo due to the turbo reaching max boost before supercharger. The supercharger will not reach max boost until max RPM. Thanks again for being such an open contributor on this site. By the way, I am not doubting anything you are posting but I am very interested in your opinion on this subject. I also understand one mistake on either system and your engine will be toast.

Yes a turbo will make max boost even at 7000 rpm.
There is no power loss due to driving a turbo but there is driving a supercharger.

 

[Trxster]

How do you calculate the octane requirements??? I am going to run 3 head gaskets and was told I could run 12psi on premium gas?

Rt

 

[BlueMax]

How do you calculate the octane requirements??? I am going to run 3 head gaskets and was told I could run 12psi on premium gas?

Rt

See calculator in sticky at top of this forum.

http://www.ty4stroke.com/viewtopic.php?t=23214

 

[Bum7272]

can I run 2 head gaskets and 10psi on pump gas and get around 200 horse with a supercgarger? I like the ease and look of the supercharger. Thanks

 

[BlueMax]

can I run 2 head gaskets and 10psi on pump gas and get around 200 horse with a supercgarger? I like the ease and look of the supercharger. Thanks

The calculator above says you can not run 10 psi with two head gaskets with pump gas. Ted gave you the rough HP numbers above also.

 

[TWIN TURBO]

Jannetty says,
"Yes a turbo will make max boost even at 7000 rpm. There is no power loss due to driving a turbo but there is driving a supercharger."

Well, a supercharger will make 3 psi at clutch engagement with no boost threshold (LAG) and 7 PSI or 10 PSI with a Stage I kit so fast the turbo hasn't even thought about it yet, unless of course you use the NOS crutch but now you have two systems to maintain and to be fair it's the NOS THAT MOVED THE SLED NOT THE TURBO.
You do have some power loss with a turbo in the way of back pressure but in all fairness again cams can be moved around to minimize the loss.
Fuel requirements are the same for both turbo and high efficiency superchargers like the MPI Rotrex, boost is boost the motor doesn't have any way of knowing one from the other.
Please keep in mind I'm a non-bias guy that loves all kinds of forced induction. Just want everyone to know they have a choice.
I don't recomend anything over 10 lbs. of boost either way with pump gas on a stock motor. If you like to hold it long I'd drop that to 7 pis, Engines are too expensive and take too long to change!
As soon as I get a chance I'll have some real dyno numbers to post for all to see.


APEX GT
71 HEMI CHALLENGER
65 BIG BLOCK CORVETTE
BOSS 429 MUSTANG
57 SUPERCHARGED T-BIRD
DURAMAX DIESEL GMC
FJR 1300 YAMAHA
CESSNA P210 (PRESSURIZED & TURBOCHARGED)

 

[Bum7272]

MPI says stage 1 for a rx1 230HP @10lbs 50/50 race gas and 200HP @ 7lbs on premium fuel

www.MOUNTAINPERFORMANCE.con

is this right and possible ??

 

[BlueMax]

MPI says stage 1 for a rx1 230HP @10lbs 50/50 race gas and 200HP @ 7lbs on premium fuel

www.MOUNTAINPERFORMANCE.con

is this right and possible ??

The MPI dyno chart shows 230 corrected horsepower for 10 lbs boost. I kind of side with Ted and wonder what the HP loss is for the supercharger belt drive. MPI states in their FAQ section that there is as much as 10 HP loss to drive supercharger. With no losses, you can barely get 230 HP from a stock 137.5 HP engine. The numbers will be within 10 HP of those published numbers.

 

[IRONMAN IRMEN]

I DONT KNOW WHY PEOPLE SAY TURBOS R LAZY IVE RACED TWO S/C APEXS AND WE WERE AT THE SAME BOOST AND GOT BOTH OF THEM ON HOLE SHOT EVEN WHEN WE SWITCHED SLEDS THE TURBO WAS FASTER OUT OF THE HOLE ALL WERE STOCK SLEDS AND TRACKS MUST TAKE TIME TO BUILD RPM TO MAKE THE BOOST NOT GONA TRY AND EXPLAIN WHY JUST WANT TO PUT IN MY .02

 

[lafusée]

hello my friend!

if you the best set up for the blower wants Ben it is necessary my set-up for you! best the blower has guaranteed day!

the miens is has to sell set-up hold made!

the best !

230 hp for trails super sans plomd !


is possible and the 280 hp c-12 !



contact me yvesmarquis@videotron.ca