TURBO POSSIBLE? HOW MUCH?
I could ride in
SuperBike
Joined: Sep 2007
Posts: 1,729
From: Dayton, TN
Senior Member
MotoGP
Joined: May 2008
Posts: 3,452
From: San Clemente, CA
Seriously, it does work. I saw one back in the late '70s on a Chevy Luv with a small block shoehorned under the hood. The Luv didn't really need the smog pump blower with the V8 though.
I could ride in
SuperBike
Joined: Sep 2007
Posts: 1,729
From: Dayton, TN
Remember stock is BAD!
SuperSport
SuperSport
Joined: Jun 2004
Posts: 760
From: Jacksonville FL
200MPH on a bike that puts out 100-110 horse stock. You are going to have have at least 190hp on tap. Speed isnt the thing to overcome its drag.
If I remember correctly (it has been a few years) if it takes 30 horse power (for example) to hit 100mph it takes 4 times the amount of horse power to hit 120mph.
The superhawk bottom end, not to mention the rest of the engine, would never take that much power, without being HIGHLY modified. The engine is not designed for high rpm use. The faster you spin a engine the more Hp you can produce
Go for it if you like, but it will be a expensive adventure.
If I remember correctly (it has been a few years) if it takes 30 horse power (for example) to hit 100mph it takes 4 times the amount of horse power to hit 120mph.
The superhawk bottom end, not to mention the rest of the engine, would never take that much power, without being HIGHLY modified. The engine is not designed for high rpm use. The faster you spin a engine the more Hp you can produce
Go for it if you like, but it will be a expensive adventure.
Senior Member
SuperSport
SuperSport
Joined: Dec 2006
Posts: 880
From: Victoriaville, Quebec, Canada
Horsepower is Torque X RPM X 5252. Turbos don't make engines rev faster, they increase the torque factor trough cylinder pressure. Aside from the cylinder placement, the SH engine is very turbo friendly, low compression, mild cams, strong engine.
If you don't get into a horsepower craze, that's what's end most turbo engine life, you could keep it together.
You could probably get 6 to 8 pounds on premium and up to 15 pounds on race gas on stock compression, with some ignition tweaks and the mandatory fuel injection.
With a built engine, rods, 8.5 compression pistons, stainless valves you could get to 15 psi on premium, but I would not attempt to go any further without sleeving the block, having the heads O-ringed, billet crank and more $$$
The durability of a turbo engine is determined by the way it's driven, short pulls, smooth driving, cool downs after pulls, no "more horsepower" craze...
As for a 200 MPH run yes it will break that speed easily, but personally I would not try to go to that speed with a SH chassis, they are just not stiff enough, but it's you life and you have the right to do what you please. A top speed run is very demanding on an engine, if it goes wrong it will be after a while, exhaust valve melting, piston, detonation, rod trough the crankcase... engine lockup at very high speed, it happened to me and it's probably THE thing that slowed me down a lot, I realized that I don't have the total control and never had.
So 3500 $ will cover a turbo, custom exhaust, piping, airbox, maybe a small intercooler, but not the fuel injection, dyno tuning and the countless hours of custom fabrication.
The only was I see this is that you build it yourself.
Good luck, I tackled this project myself and it still in y brain on a shelf, until I get the cash flowing
If you don't get into a horsepower craze, that's what's end most turbo engine life, you could keep it together.
You could probably get 6 to 8 pounds on premium and up to 15 pounds on race gas on stock compression, with some ignition tweaks and the mandatory fuel injection.
With a built engine, rods, 8.5 compression pistons, stainless valves you could get to 15 psi on premium, but I would not attempt to go any further without sleeving the block, having the heads O-ringed, billet crank and more $$$
The durability of a turbo engine is determined by the way it's driven, short pulls, smooth driving, cool downs after pulls, no "more horsepower" craze...
As for a 200 MPH run yes it will break that speed easily, but personally I would not try to go to that speed with a SH chassis, they are just not stiff enough, but it's you life and you have the right to do what you please. A top speed run is very demanding on an engine, if it goes wrong it will be after a while, exhaust valve melting, piston, detonation, rod trough the crankcase... engine lockup at very high speed, it happened to me and it's probably THE thing that slowed me down a lot, I realized that I don't have the total control and never had.
So 3500 $ will cover a turbo, custom exhaust, piping, airbox, maybe a small intercooler, but not the fuel injection, dyno tuning and the countless hours of custom fabrication.
The only was I see this is that you build it yourself.
Good luck, I tackled this project myself and it still in y brain on a shelf, until I get the cash flowing
Thread Starter
Junior Member
Squid
Joined: May 2008
Posts: 15
Horsepower is Torque X RPM X 5252. Turbos don't make engines rev faster, they increase the torque factor trough cylinder pressure. Aside from the cylinder placement, the SH engine is very turbo friendly, low compression, mild cams, strong engine.
If you don't get into a horsepower craze, that's what's end most turbo engine life, you could keep it together.
You could probably get 6 to 8 pounds on premium and up to 15 pounds on race gas on stock compression, with some ignition tweaks and the mandatory fuel injection.
With a built engine, rods, 8.5 compression pistons, stainless valves you could get to 15 psi on premium, but I would not attempt to go any further without sleeving the block, having the heads O-ringed, billet crank and more $$$
The durability of a turbo engine is determined by the way it's driven, short pulls, smooth driving, cool downs after pulls, no "more horsepower" craze...
As for a 200 MPH run yes it will break that speed easily, but personally I would not try to go to that speed with a SH chassis, they are just not stiff enough, but it's you life and you have the right to do what you please. A top speed run is very demanding on an engine, if it goes wrong it will be after a while, exhaust valve melting, piston, detonation, rod trough the crankcase... engine lockup at very high speed, it happened to me and it's probably THE thing that slowed me down a lot, I realized that I don't have the total control and never had.
So 3500 $ will cover a turbo, custom exhaust, piping, airbox, maybe a small intercooler, but not the fuel injection, dyno tuning and the countless hours of custom fabrication.
The only was I see this is that you build it yourself.
Good luck, I tackled this project myself and it still in y brain on a shelf, until I get the cash flowing
If you don't get into a horsepower craze, that's what's end most turbo engine life, you could keep it together.
You could probably get 6 to 8 pounds on premium and up to 15 pounds on race gas on stock compression, with some ignition tweaks and the mandatory fuel injection.
With a built engine, rods, 8.5 compression pistons, stainless valves you could get to 15 psi on premium, but I would not attempt to go any further without sleeving the block, having the heads O-ringed, billet crank and more $$$
The durability of a turbo engine is determined by the way it's driven, short pulls, smooth driving, cool downs after pulls, no "more horsepower" craze...
As for a 200 MPH run yes it will break that speed easily, but personally I would not try to go to that speed with a SH chassis, they are just not stiff enough, but it's you life and you have the right to do what you please. A top speed run is very demanding on an engine, if it goes wrong it will be after a while, exhaust valve melting, piston, detonation, rod trough the crankcase... engine lockup at very high speed, it happened to me and it's probably THE thing that slowed me down a lot, I realized that I don't have the total control and never had.
So 3500 $ will cover a turbo, custom exhaust, piping, airbox, maybe a small intercooler, but not the fuel injection, dyno tuning and the countless hours of custom fabrication.
The only was I see this is that you build it yourself.
Good luck, I tackled this project myself and it still in y brain on a shelf, until I get the cash flowing
Senior Member
Back Marker
Joined: Feb 2007
Posts: 204
From: Shelbyville, KY
Well a little faster can be had with other mods besides turbo and cheaper. Just take an afternoon and read through all the available threads here.
Remember stock is BAD!
SuperSport
SuperSport
Joined: Jun 2004
Posts: 760
From: Jacksonville FL
I could not agree more.
With my comment about the bottom end I was thinking about the way the conn rods are attached to the crank. The knife and fork style attachment. This can be a big weakness.
Member
Squid
Joined: May 2008
Posts: 36
Hmmm I bet that a N02 kit would make the hawk fly in the straights 
Plus with proper switch placement you would not have to worry about the ill effects of boost in a corner.
Dang it, new winter project.
I was thinking about trying to fab up a overflow tank for the gas tank in the rear area, guess I will have to find a few small bottles to go there instead
Plus with proper switch placement you would not have to worry about the ill effects of boost in a corner. Dang it, new winter project.
I was thinking about trying to fab up a overflow tank for the gas tank in the rear area, guess I will have to find a few small bottles to go there instead
Senior Member
Superstock
Joined: May 2006
Posts: 284
From: New Jersey USA
where are you going to ride 200mph?? after you wad it up who's gona pay the dr bill's?? when did you get you eng. degree?? why is this a stupid idea?? you could take the easy way out and strap a rocket to your ***!
Senior Member
SuperSport
SuperSport
Joined: Dec 2006
Posts: 880
From: Victoriaville, Quebec, Canada
IMO it's one of the worst engine design ever made, but hey they sell why bother
But Honda's engineers know better, they used strong I beams rods, they share a common journal and are placed side by side, these could take a lot of abuse before they bend.
Last edited by gboezio; Oct 2, 2008 at 02:09 PM.
Remember stock is BAD!
SuperSport
SuperSport
Joined: Jun 2004
Posts: 760
From: Jacksonville FL
I could be wrong here, but I thought that the 650 hawk and the superhawk had a knife and fork style conn rod attachment.
I could ride in
SuperBike
Joined: Sep 2007
Posts: 1,729
From: Dayton, TN
Pic is worth a thousand words
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