Jnimbostratus Street Fighter Project

[jnimbostratus]

1350 is my end goal thats why i am looking for a spare motor to build on the stand. i have also been flirting with the idea of machining a head spacer to drop compression to allow more boost. i know this is common in the vw world with aftermarket supercharger applications.

[jnimbostratus]

The more I have been thinking about it the more my mind has been changing about running an intercooler. Should be fun to find someplace to fit considering there is not much left off the bike. I'm thinking maybe one large front mount out in front of the bike or a smaller sidemount maybe one on each side.

[~JM~]

The more I have been thinking about it the more my mind has been changing about running an intercooler. Should be fun to find someplace to fit considering there is not much left off the bike. I'm thinking maybe one large front mount out in front of the bike or a smaller side mount maybe one on each side.

Please correct me if I'm wrong, but those are about the only 2 options that I see for intercooler mounting on a bike. Front mount, below the oil cooler would probably be best. Might want to put a heat shield on each head-pipe or wrap them. That would put the cooler out front in the cold wind. A couple of side mounts would be cool, but more complex plumbing. Probably better for a dual turbo set-up.

[jnimbostratus]

when i said front mount i meant way out front. infront of the forks.

[fj1289]

when i said front mount i meant way out front. infront of the forks.

Exactly - under your headlights - put that piece of frame to good use! 

Can't wait to see it screaming in anger!

[~JM~]

Hmm... That would be THE best place, but might be homely having a big ole shiny box hanging off the front of your bike.

The intercooler is worth the extra expense & trouble. It will pay for itself in increased performance.

[jnimbostratus]

Yea I hear you on the aesthetics I think if I don't go to big an I go black it may not be to bad. Maybe put some numbers on it make it double as a number plate. I will do some cardboard mock ups before I decide what route to take.

[fj1289]

I've always preferred the looks of bikes (and cars and planes) where form follows function -- clean, tidy, professional work is its own art form. 

I like the number plate idea - reminds me of the old super bikes

[~JM~]

1350 is my end goal thats why i am looking for a spare motor to build on the stand. i have also been flirting with the idea of machining a head spacer to drop compression to allow more boost. i know this is common in the vw world with aftermarket supercharger applications. 

The bigger bore will increase your compression unless you use a dished or reverse dome piston. I think that you want your compression ratio around 8:1. You might want to research how difficult it is to seal the combustion chamber with that large of a bore. You don't really need extra displacement when you have boost. The idea of a spacer between the cylinder & the head, may cause the "squish" distance to land in the detonation prone range. Ultimately you want about .040" between the top of the piston & the combustion chamber to maximize "squish" & help minimize detonation.

Do you know if ARP offers head studs for the FJ? Keeping the head from lifting under boost is a common problem.

Just a few angles for you to contemplate. Maybe a stock displacement will provide a stronger deck than a big bore kit. Plus the 1200 should run a bit cooler than the big bore. Intake & engine heat is going to be your enemy.

[jnimbostratus]

Great information to consider thanks man appreciate your interest.

[~JM~]

I have been fascinated with turbocharging ever since it clicked that all that exhaust energy was just wasted out the tail-pipe. Now you can harness that energy.

I don't know a whole lot about them in a bike application, but would love to ride a turbocharged bike. I dig it when the turbine spools up & the boost comes on. It almost feels like the power band of a well tuned 2-stroke.

[scotiafj]

Nice bike, do you have a link to the Facebook page it was on? I can't seem to find it.

try these:

https://www.facebook.com/photo.php?fbid=10202385563194380&set=pcb.10152567261808124&type=1&theater

https://www.facebook.com/photo.php?fbid=10202385558914273&set=pcb.10152567261808124&type=1&theater

or the main page is here:  https://www.facebook.com/groups/2331723123/

haha ...thats my face book page  got it off another fb page fj1100 1200 1300 sport tourer lateral frame concept 

[jnimbostratus]

well tuned 2 stroke is a great comparison. i took a guy from work that is obsessed with 2strokes for a ride in my built audi s4 its 2.7 v6 twin turbo and when we hit boost in second gear and spun all 4 tires he yelled "holy shit its a 2 stroke"

i measured the front of the bike up a little bit and i think there is an ebay intercooler that will look great with the numberplate look 13x6

[fj1289]

1350 is my end goal thats why i am looking for a spare motor to build on the stand. i have also been flirting with the idea of machining a head spacer to drop compression to allow more boost. i know this is common in the vw world with aftermarket supercharger applications. 

The bigger bore will increase your compression unless you use a dished or reverse dome piston. I think that you want your compression ratio around 8:1. You might want to research how difficult it is to seal the combustion chamber with that large of a bore. You don't really need extra displacement when you have boost. The idea of a spacer between the cylinder & the head, may cause the "squish" distance to land in the detonation prone range. Ultimately you want about .040" between the top of the piston & the combustion chamber to maximize "squish" & help minimize detonation.

Do you know if ARP offers head studs for the FJ? Keeping the head from lifting under boost is a common problem.

Just a few angles for you to contemplate. Maybe a stock displacement will provide a stronger deck than a big bore kit. Plus the 1200 should run a bit cooler than the big bore. Intake & engine heat is going to be your enemy.

The sleeves that are used for 1314 pistons can also be used with 1250 pistons and will have that much thicker (and stronger more stable) walls.  Combine that with an XJR Siamese block and you'll have the strongest cylinder I can think of that is still streetable.   

APE (aperaceparts.com) has heavy duty cylinder studs and nuts.  I'm sure Randy can get them too

[Pat Conlon]

Do you have a target boost level?  Personally, I would be leery on running a turbo with carbs.

On the other hand...a RPM fuel injection system (hint hint) would allow for precise tuning.