[Fot] TR6 Racing Tire Question

[Scott Janzen]

Interesting to read Tony’s comments, because my experience is generally the opposite.  Guess that’s why there are choices in the market.
I ran the toyo R88Rs for years on my GT6 - 205/60-13s - and decided to try the Speedsters when they started making them in 13s several years ago.  I find they are much more consistent - they don’t get greasy halfway through a session in warmer weather which the Toyos did for me.  For the Toyos, about 15-20 minutes into a session, going “off" was a consistent issue.  I find the breakaway is more consistent too. My lap times are a hair better, 0.5 to maybe 1.0 seconds - with the Hoosiers.  

That said, I’m running 13" wheels in an 1850 lb car and you are running 15’s on a car that is probably not much heavier, so your tires may have an easier job of it.  As you know, I work the GT6 pretty hard.  For me, the consistency throughout the race is worth it, but Tony is right - they certainly wear out more quickly.  I figure the Speedsters give me about a season (5 weekends), and then they become the second set on my spare wheels for practice sessions, etc.  I used to get the Toyos shaved and even then it was tough to wear out the rubber, but at a certain point they had just been through too many heat cycles to be usable anymore.  The Speedsters have a softer compound, no question.

In the 13s, the price diff is about $70/tire.  Only one way to find out - get a set and give them a try!

Alternator - not sure how easily they adapt to the TR6 mounting, but I run a 55 amp Denso alternator that I think was originally spec’d for an Isuzu - pretty common.  Pep Boys under $100.  Can be wired as a one wire set up, plus the output cable.  I was able to use the block mounted bracket with a long bolt to hang the alternator out front (single shear mount) and a lower strut supporting the adjustable bracket from further down on the block.  I run cogged belts so there’s not the tension issue.  I’ll dig the spare out and find the number, but it’s definitely not quite a bolt in swap.

Scott

On Feb 6, 2024, at 3:23 PM, Tony Drews via Fot <fot at autox.team.net> wrote:

Mike, this is on a TR-4, but I've switched from the Speedsters to the R888R's and am very happy with the switch.  I get much longer tire life (primary factor in the switch), they don't get greasy halfway through a session like the Speedsters do (or at least they did for me), traction and handling characteristics are very similar, forgiving breakaway, and MUCH better in the wet than Speedsters.  I had to go plus 1 on the wheel diameter to keep the tire diameter the same since they don't make the R888R in 60 series.  I run 205/55-16's, but have run the 205/50 15's in the past and they are fine too.

Regards, Tony Drews

On 2/6/2024 1:55 PM, finishing Touch via Fot wrote:
> I have two questions:
> 
> 1.Has anyone raced both the Hoosier Speedsters and the Toyo Proxie R888Rs.  I'm curious what the comparisons would be in regards to dry traction and longevity. I just did some pricing and the difference between the two are almost $400 a set (four).
> 
> 2. I Would also appreciate any suggestions on an after-market (smaller) alternator for a TR6 Motor.
> 
> Thanks in advance,
> Mike Kurtz
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