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Semi's For Sprints & Hill Climbs

Mr. Untouchable
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34GeeTeeTee Grand Master

34GeeTeeTee

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Just got back from Wakefield. R888 can choke on a big dick. Mine were old, so they took a while to get some heat in and come back to life, but I got juddering understeer, the got hot, and then wouldn't turn. I had nt01 on the rear which was better, as newer, but found they went off after 5 or 6 laps. May need to decrease pressure more.

End of the day, the semis were no faster than my federal RSR time.

Interesting!!

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

Might add, I can't drive for shit, and I pussehed out under brakes lots.

Also, semis are a lot more communicative v rsr, and I found myself catching oversteer better.

Well i will be in the same situation! Will try do a run on RSR too see how i handle that first ;)

hrd-hr30 Grand Master

hrd-hr30

Posted
Posted (edited)

Is anyone out there running the same comp tyre for sprints and hill climbs and if so are you just starting the pressures higher for hill climbs???

Yep. I used to run A032R and Toyo RA1 back when I was hillclimbing and sprinting. For hillclimbs you basically want to start with cold pressures set to what the tyre's hot pressure should be at sprints - depending on how much of a burnout you do, you might start the rears a pound or two lower.

Just got back from Wakefield. R888 can choke on a big dick. Mine were old, so they took a while to get some heat in and come back to life, but I got juddering understeer, the got hot, and then wouldn't turn. I had nt01 on the rear which was better, as newer, but found they went off after 5 or 6 laps. May need to decrease pressure more.

End of the day, the semis were no faster than my federal RSR time.

old semis on the front and newer ones on the back was never going to be a recipe for success. Particularly in winter at Goulburn. Not really fair to compare them to a matched set of RSRs all round.

I was pretty critical of R888s when i had them, because they didn't seem to offer much grip. But they can produce good lap times if you are prepared to throw the car around. I was only a tenth faster at Lakeside when i changed to FZ201s. But the car felt much more planted on the Federals, and needed less steering angle almost everywhere.

People say the R888 seem to work well on light cars. I think its more that the really light cars tend to be less powerful. R888s don't like putting power down while exiting corners in my experience. A lighter less powerful car wouldn't really test them so much in that regard.

Edited by hrd-hr30
PN-Mad Grand Master

PN-Mad

Posted
Posted

old semis on the front and newer ones on the back was never going to be a recipe for success. Particularly in winter at Goulburn. Not really fair to compare them to a matched set of RSRs all round

Yup, agree with you, when I cleaned them up this morning for storage, I also found the front left, the one I was having trouble with is 6 years old. Lol.

I'll try some re55s on the front next track day.

Wakefield wasn't actually cold yesterday, it was quite warm.

Mr. Untouchable Experienced

Mr. Untouchable

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Yep. I used to run A032R and Toyo RA1 back when I was hillclimbing and sprinting. For hillclimbs you basically want to start with cold pressures set to what the tyre's hot pressure should be at sprints - depending on how much of a burnout you do, you might start the rears a pound or two lower.

.

cool, thought that might be the case. Still bummed about the federals, have searched around and found a few other sites where people have found a difference in the new FZ 201's. at 365 per corner they would of been very affordable. That's life I guess. Kumho's still the hot favourite I think ATM, performance-dollar-life wise. Not much cheaper than z221's but life span is sounding better still.

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