79 SRX Heat exchanger deleat question

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TerryR

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I race 660 ft snow drags on hard packed snow. Setting up the 79 SRX
to race without using a cool down cart. Want to defeat the tunnel exchanger only.
Anyone try this to comment on how well it works? Racing stock events that allows some alterations.
 
Parts listing makes it look like comes out of engine to rad then to
cooler then back to engine .. Looks like a hose from radiator to engine would fit.
My question is why . Maybe 8 lb involved . Expect you need clearance in track tunnel
for some nasty studs.
Are you allowed to add an extra rad even for more coolant ? as I expect some days you
will be shutting off so hot that when water pump stops circulating it could seize.
Just my thoughts .
Ron
 
RON HYDRAULIC YAM said:
Parts listing makes it look like comes out of engine to rad then to
cooler then back to engine .. Looks like a hose from radiator to engine would fit.
My question is why . Maybe 8 lb involved . Expect you need clearance in track tunnel
for some nasty studs.
Are you allowed to add an extra rad even for more coolant ? as I expect some days you
will be shutting off so hot that when water pump stops circulating it could seize.
Just my thoughts .
Ron
Click to expand...
Hi Ron. From your comment you have not tried this. Looking for anyone who has real world experience on this. Thanks. Looking at weight saving
 
Are you allowed to lighten the track ?
Hot knife off some of the track lug height and use shorter studs ? Shouldn't
damage the strength of the actual belting and will also reduce the torque
and power needed to spin it.
Try on another scrap track first to make sure they didn't add any belting up
into the lugs, expect they are pure rubber.
A friend said "try it, you will like it" . Went like stink !
When I returned the sled , he said I was the only one that still had it pinned past the finish marker
of the guys that tried it . Certainly hauled butt faster than my fluid drives.:lol:
Good luck , have fun and stay safe.
Ron
 

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RON HYDRAULIC YAM said:
Are you allowed to lighten the track ?
Hot knife off some of the track lug height and use shorter studs ? Shouldn't
damage the strength of the actual belting and will also reduce the torque
and power needed to spin it.
Try on another scrap track first to make sure they didn't add any belting up
into the lugs, expect they are pure rubber.
A friend said "try it, you will like it" . Went like stink !
When I returned the sled , he said I was the only one that still had it pinned past the finish marker
of the guys that tried it . Certainly hauled butt faster than my fluid drives.:lol:
Good luck , have fun and stay safe.
Ron
Click to expand...
Would be good but I race on packed/not so packed snow .
 
I keep hoping that keeping this post active might grab someone's attention that has
your answer . I don't think the fellow that built the sled in my picture ever
experimented in that manner, but did race them.
Ron
 
Obviously it is just the air rad that will be doing the cooling.
If you were to mount a 12volt fan onto that rad(such as one from an apex) then there would be no problem. You would have to use a small lithium battery. They are very light. I think a fan and lithium battery would weigh much less than the heat exchanger, plumbing and coolant.
I would go as far to say that a fan on the rad would cool even better than the heat exchanger given your machine isn't moving very much except when you make a pass.
 
74Nitro said:
Obviously it is just the air rad that will be doing the cooling.
If you were to mount a 12volt fan onto that rad(such as one from an apex) then there would be no problem. You would have to use a small lithium battery. They are very light. I think a fan and lithium battery would weigh much less than the heat exchanger, plumbing and coolant.
I would go as far to say that a fan on the rad would cool even better than the heat exchanger given your machine isn't moving very much except when you make a pass.
Click to expand...
Can't add a fan. Now it's mod.
 
74Nitro said:
Well that sucks. What if you used a fan on the rad just to cool it down between passes.
Click to expand...
That's OK. The mod guys have no cooling system I believe as they have a cool down cart they use after each run. So my logic is that having only the radiator to cool for a short run of less than 8 seconds
should be adequate. The 76 mercury snowtwister had only a rad about the same size and it had 90 hp. 79 srx has 80. Set up and raced s 76 440 twister. No thermostat was stock.
 
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