[DecepticonDon]

In order to do this correctly, a bunch of research is going to be put into this. This will be a thread to coalesce my ideas into a workable solution.

The one thing I dislike about my bike is the GINORMOUS radiator. The Street triple radiator is about 2/3 the size of the Daytona's and can still handle cooling the bike with no problem. the easiest possible solution.....but with the abundance of Striple parts already on my bike...I feel like the easy route has been done to death. :thumbsup: or :doh:

I have seen a couple of bikes with an underseat radiator. It will really clean up the front and make the overall look of the bike more svelte.

after I get rid of the underseat exhaust, there will be plenty of room for a rad. With the addition of a bellypan, the associated plumbing will be hidden easily since both the inlet and outlet hose come from the bottom of the engine.

1. Any advice on custom radiator companies which don't charge an arm and a leg?
2. Any hard and fast rules on radiator displacement vs. engine displacement?
3. should ducting be used to increase cooling, or only utilize pusher fan(s)?
4. thoughts, concerns, comments....share

 

[dine]

Do you have any pictures of a set up your thinking about? Airflow obviously would be my concern. Not that there's not a way to fix that but it is an added difficulty


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[Jackstand Johnny]

Airflow would definitely be a problem unless you've got some kind of air foil panel design in mind or something. where exactly under the seat would it be going? under the tail? Is it gonna be vertical or horizontal? I think vertical is the only orientation that will work. This is a pretty strange idea and I'd really like to see what you come up with.

 

[DecepticonDon]

This is probably the inspiration. Kinda cool, but kinda cheesy

Benelli Tornado 900 TRE

http://www.orpheusweb.co.uk/bob.williams/benelli/tornado.htm

Here's one of a VTR

http://www.advrider.com/forums/showthread.php?t=523072&page=69

MotoCyscz race bike

 

[DecepticonDon]

Probably a setup like what the VTR or Motcyscz has.

 

[eatabullet]

Go take a look at truckers 2009? Buildoff bike. Vtr with custom undertail rad.

 

[eatabullet]

http://www.customfighters.com/forums/showthread.php?t=15986

I believe he used the stock rad.

 

[MikeGyver]

The Under seat radiator idea is always an interesting discussion. Airflow would be my biggest concern. Are you thinking about an air duct or just fans. I don't think you are going to find a displacement to rad ratio since there are a lot of factors to consider.

a local forum had some radiator shop suggestions. May be of no use since you are far away but it is a starting point. http://bayarearidersforum.com/forums/showthread.php?t=431738

 

[DecepticonDon]

http://www.customfighters.com/forums/showthread.php?t=15986

I believe he used the stock rad.

Thanks for that

The Under seat radiator idea is always an interesting discussion. Airflow would be my biggest concern. Are you thinking about an air duct or just fans. I don't think you are going to find a displacement to rad ratio since there are a lot of factors to consider.

a local forum had some radiator shop suggestions. May be of no use since you are far away but it is a starting point. http://bayarearidersforum.com/forums/showthread.php?t=431738

after thinking about it, any type of "scoop" to help bring in fresh air would be behind my body and not very effective.
Probably leave the sides on the subframe open so fresh air can be drawn in from the fans.

 

[eatabullet]

I don't know if it would matter on a scale this small, but would the increased head be too much for the water pump?

 

[piester]

I don't know if it would matter on a scale this small, but would the increased head be too much for the water pump?

increased head is never a bad thing...

 

[DecepticonDon]

I don't know if it would matter on a scale this small, but would the increased head be too much for the water pump?

exactly the kind of concern I was looking for!

Not sure. of the three hoses going to the radiator, only one would need to be lengthened significantly, about twice its original length. the other two may need some, but negligible.

 

[MikeGyver]

Maybe a scoop under the subframe under the seat. A small one would be better than nothing.

 

[CtotheQ]

I've been thinking about the same thing for my bike, my stock rad would slot in pretty nicely in the sub frame. Couple things I have thought about. Increased load on the water pump... should you route it so the water pump is pushing the water up through the rad, or the other way around? Airflow... my bike has a pretty open area around the seat to let air in, but not a whole lot of clearance under the seat for a pusher fan, so I was thinking about using a puller fan like the stock set up underneath the rad. Will probably be able to see it and might not look super clean. Radiator outlets.. I think I would need to have mine modified in order to put them in a more ideal place for routing the hoses and whatnot. And then the biggest issue for me is how much heat is going to radiate up from the rad under my ass.

 

[Fate]

I think with the 675 you'd want to add some scoops like those off a cbr for airflow.

 

[Problomatic]

What about adding an oil cooler to help keep temps down? They're a lot smaller and shouldn't be too hard to hide. Might make up for the radiator's lack of airflow...

 

[eatabullet]

exactly the kind of concern I was looking for!

Not sure. of the three hoses going to the radiator, only one would need to be lengthened significantly, about twice its original length. the other two may need some, but negligible.

your also mounting the rad half a foot or so higher.

i'd think it wouldn't affect the water pump. unfortunately i don't run pump sizing calcs at work. any chance that triumph can give you a pump rating? a quick email to them might solve this problem.

 

[thaOrleanyte]

Not to mention the weird shit you can do with the inertia from that fluid being so rearward, and the COG changes.

So, my focus would be getting it as centralized as possible, get some high CFM 12vdc fans, and fab a heatsink. Trial and error on operating temps and fan output from there.


Can you explain why the pump load would increase and why that's bad? I can't see the minor fluid pressure difference being that difficult for the pump to handle.

 

[eatabullet]

Can you explain why the pump load would increase and why that's bad? I can't see the minor fluid pressure difference being that difficult for the pump to handle.

he'll be pumping to a farther and higher location than stock. i don't think triumph designed a water pump that'll only handle the exact pressure of the rad in the stock location, i'd assume it's slightly over spec'd, buuuuut i'd hate for him to find out the hard way.

 

[DecepticonDon]

your also mounting the rad half a foot or so higher.

i'd think it wouldn't affect the water pump. unfortunately i don't run pump sizing calcs at work. any chance that triumph can give you a pump rating? a quick email to them might solve this problem.

HAHA....you've never tried to get ahold of Triumph before. I could try though.

What kind of specs?

What could happen by "finding out the hard way" cavitation, wearing out of pump? i don't know much about fluid dynamics

Not to mention the weird shit you can do with the inertia from that fluid being so rearward, and the COG changes.

So, my focus would be getting it as centralized as possible, get some high CFM 12vdc fans, and fab a heatsink. Trial and error on operating temps and fan output from there.


Can you explain why the pump load would increase and why that's bad? I can't see the minor fluid pressure difference being that difficult for the pump to handle.

The stock exhaust/midpipe would be gone, which would account for about 10-15 lbs.
Probably would need to have my suspension set up after moving all that weight around.