Motorcycle Racing Forum

Motorcycle Racing => Wrenching => Topic started by: tzracer on April 01, 2003, 08:55:49 AM

Title: RC51 racers
Post by: tzracer on April 01, 2003, 08:55:49 AM
Does your bike tend to run hot? I have seen as much as 230F with mine. Can't afford a trick front radiator set up so I am trying a cheap ($100) alternative of adding another small radiator. It was very easy to do. Not sure if it is going to be warm enough this weekend to tell if it is going to work. If you are at BHF this weekend, stop by and see my attempt at making my bike run cooler (I am hoping for at least a 10F drop).
Title: Re: RC51 racers
Post by: tigerblade on April 01, 2003, 09:23:05 AM
I'm interested to see what you came up with (won't be at BHF though  :-/).  I guess the whole idea behind the side-mounted radiators was probably that the CG could be as far forward as possible, but they sure don't work that well.   ::)

You don't have the $$$ for one of the HRC kit radiators?   :o  ;)
Title: Re: RC51 racers
Post by: spyderchick on April 01, 2003, 10:13:57 AM
Mrs tzracer is supercool, but not that super cool. Thus the RC is not super cool. ::) Ok...I have way too much time on my hands today, I'm gonna go get some work done.
Title: Re: RC51 racers
Post by: cabbage996 on April 01, 2003, 10:24:47 AM
tigerblade's RC overheats cause he never takes it out of 1st gear when he's cruising the local strip at 35 mph trying to pick up highschool girls.
Title: Re: RC51 racers
Post by: Litespeed on April 01, 2003, 10:43:24 AM
I saw around 218 last summer at Buttonwillow while riding mine last year.  I have seen something around 200 lately here in AZ and expect to repeat the 218 in the summer heat.  My bike has a slipon and PCII but other than that doesn't really have anything done.  I do run water/water wetter only in it.
Title: Re: RC51 racers
Post by: tigerblade on April 01, 2003, 10:58:32 AM
Quotetigerblade's RC overheats cause he never takes it out of 1st gear when he's cruising the local strip at 35 mph trying to pick up highschool girls.

Don't you have some animals to euthanize or something?
Title: Re: RC51 racers
Post by: tzracer on April 01, 2003, 11:01:57 AM
Yoyodyne carries a radiator kit, price about $1800. The problem I have with the kit is replacement parts. If I skip buying a new railer, I could get the kit. If my cheap experiment doesn't work, I may get a custom radiator made from C&R (they said about $350 to $450).

Yes Mrs. Tzracer is quite cool, but she prefers when I ride the TZ because then she has something to do at the track.

I am also going to get some of those side louvers. Anyone try them?
Title: Re: RC51 racers
Post by: tigerblade on April 01, 2003, 11:07:45 AM
I've read about the Moriwaki radiator fins but didn't get the impression that they helped that much.
Title: Re: RC51 racers
Post by: tzracer on April 01, 2003, 11:17:46 AM
There is a guy in Canada making his own version (significantly cheaper, http://squidskins.com/). I am figuring every little bit may help.
Title: Re: RC51 racers
Post by: tigerblade on April 01, 2003, 12:25:14 PM
C'mon, you've got $1850 to throw Thorsten's way, don'tcha?   ;D

(https://www.ccsforum.com/proxy.php?request=http%3A%2F%2Fmembers.fireblades.org%2Ftigerblade%2Fimages%2FThorsten%2520Rad%2520Kit&hash=7c5d02f7612efd9f07c25466d57c303300ca526b)
Title: Re: RC51 racers
Post by: tzracer on April 01, 2003, 03:57:43 PM
Nice looking parts. Wish I had the extra cash.
Title: Re: RC51 racers
Post by: tigerblade on April 02, 2003, 07:05:21 AM
No kidding.  I'm lucky to afford the distilled water I put into my stock radiators.   ;)
Title: Re: RC51 racers
Post by: tigerblade on April 02, 2003, 07:07:04 AM
Do you run the fan?  I've read where other guys removed the fan completely since they think it actually impedes airflow when moving.  Makes sense I guess but I'd be afraid to run without it and you would have to be careful about sitting still for very long.
Title: Re: RC51 racers
Post by: tzracer on April 02, 2003, 08:53:08 AM
One of the first things I got rid of. I kept the foam at the rear of the radiator and along the top. If I have to sit still (except on the grid) I shut the bike off.

Thorsten said to get rid of the thermostat. I may remove it, take out the parts that close the thermostat and reinstall it. Haven't bothered because it is a pain to get at.
Title: Re: RC51 racers
Post by: RC51Racer on April 02, 2003, 03:09:09 PM
I'm trying to remember what my RC's temps wree last year, but I don't think they even got into the 200's.  The only things I've done to the bike is the exhaust system and PCII.

Let me know what happens.

Mike
Title: Re: RC51 racers
Post by: unforgivenracing on April 03, 2003, 01:10:19 PM
 :DHi,   Lets' me think :Phmm ??? ouch :-/ oh ah, now I know.  top temp on the street was 223 @ a air temp of about 97 (stop light) last year.  I installed a 1/2" spacer in the foward Radiator mounts to pivit more air, also removed those little plastic fins on the edges of the Radiator, and used exhaust rap to keep heat from motor.  When I race...I remove the One fan.  Bike ran good and below 200.
Hope I was of some help.  See ya at BHR.  I'm not going racing in the rain with ya,  :'(but I will watch and check out your bike. ;D