Indy Evo

iTrader: (41)

Positron, pretty soft tire . It's a good problem to have to get rid of bite, not trying to find it.

Indy Evo

iTrader: (41)

Best time to date with the BFG's 12.015 @ 112.34
Best time to date with the Hoosiers 11.837 @ 114.86 with no additional mods -.178 ET reduction 2.52 MPH gain

9sec9

iTrader: (2)

Jim, the best ET gain was .178, but the best MPH gain might have been over 3 mph. 113.x to 116.x. At the same track, the 'bests' difference was 113.x to 115.34. When you look at the best ET run to best ET run between the BFG's and the Hoosiers, then yes the best mph diff was 2.52. I say that to show that the mph gains are even greater than just those 2 best ET runs. Again, your driving on the 11.83 pass was nearly perfect. As close as you can get without NLTS and yet, the rpm's didn't 'overrun' between gears.

Indy Evo

iTrader: (41)

Rut Ro...Thats why you are the record keeper, and I just drive .

Indy Evo

iTrader: (41)

Update: Around 18 passes on the R&D tires and they are showing very little wear. You can see the parting line down the center of the tire so with a few more passes they should be broken in . With a higher HP car they should come in a bit quicker. We will keep you up to date on wear and performance. Thanks, Indy

FL_SilverEvo8

iTrader: (15)

you might of been on the phone with me. we were shootin the $hit on alot of evo stuff. thanks for the info on water/meth mix. you were right. it did drop intake temps. and quiet down the engine.

Indy Evo

iTrader: (41)

Just got the word from Hoosier, the second batch will be here on the 23rd and ready to ship on the 24th. First come first served.

Indy Evo

iTrader: (41)

Only 6 sets left of the second run, shipping Friday.

Jack_of_Trades

iTrader: (17)

Anyone else run these yet and see improvements at the track?

PATRICK B.

iTrader: (5)

I too have the same feeling but only time will tell.

Hope to have some useful info for others soon.......my trans is back in one piece and should go back in by the weekend.

We should have a few different HP level cars to try them on in the next week or two. (650ish / 550ish / 360ish)

9sec9

iTrader: (2)

A very good racer with 8 second potential also has a set, but we'll see what he does, if and when he posts. I'm really looking forward to the 500+ whp cars gettting them dialed in. Like I've said and we've backed up on numerous occassions, "There's more to a drag race than a 60' time'.

Jack_of_Trades

iTrader: (17)

Sure is, but its aalways nice to start with square one and work forward.

9sec9

iTrader: (2)

Doesn't really matter which end you start with as long as you get to a better 'end' in the end. Time will tell all. Without having the tires at all, we wouldn't have anything to test. Without having the tires to test, we'd all be bench racing about how they would do. Best thing to do is bring them to the market, test them and see the results. So far, our results have been very favorable. Average mph was 112-113.3 before the tires and lighter clutch. After, the average is high 114's to mid 115's with a 116.58 in the mix. I don't think the clutch adds that much, while at the same time, the ET's have dropped by 2 tenths. In any book, most racers would be happy with that, considering the 60' hasn't changed (1.7x) while Indy gets used to the clutch AND running in a much higher DA (2000+ the last three outings). Give the tires some time for those who have them to find their sweet spot after getting them 'broken in' and the 'early' end will come around too.

kouzman

iTrader: (6)

But I hear people say that 80% of the ET is in the 60ft...

Bad 60ft at 1.9 and I am turnng 11.5s @ 131
good 60ft at let's say 1.6 I could be turning 10s....

Can't wait for more results from the high power cars. It would be also useful to know the weight of the cars also... It makes a huge difference to have a 3000 lbs ca with driver than a 3400 lbs car!

9sec9

iTrader: (2)

kouzman, the 60' statements are true. But that is only part of the equation. If a 60' was the only important thing, then how can a better ET and higher MPH be explained with the SAME 60' time? The reason is simple. After the 60' time, the car still has to accellerate for another 1260'. To accellerate at maximum rate, (this is where whp comes into play and the lighter rotational mass affects how much whp a car puts to the ground) the lighter tire and less rolling resistence continues to affect the performance of the car as it goes down the track. As the MPH goes up, the ET continues to drop. Pushing tires with 13-15 lbs of air is a lot harder than rolling one with 30 lbs of air. Imagine 4 tires instead of just one. Again, grip, tire height, radial design and weight are important tire factors. The Hoosier has proven to have 3 of those attributes with the final 'measured' number being the grip aspect. The grip has many factors that come into play. WHP/WTQ of the car, launch RPM, track prep, suspension setup, driver mod and many others. With those factors being weighed, the Hoosiers are showing VERY consistent times since probably 80+% of the runs are within .03 seconds of each other. That shows consistency. Indy's car is not a light car with the driver, nor is it a high horsepower car to pull the good 60's with the weight consideration. It's weighs 3450+ pounds. The whp to weight ratio just isn't there. Lots of issues to look at when trying to judge a tire by a simplified 60' time. I'll ask a question. If a car can lower it's 60' time by lowering the tire psi, does that improve the down track times, e.g. 330-660, 660-1000, 1000-1320, or does it adversely affect the down track times? Most of the time gained (90-95%) is already realized in the first 660'. My feelings are that while the better 60' does show 1.3 - 1.5 times the improvement by the end of the 1/4, what would the net result be if you could duplicate the good 60', but have the attributes of higher tire pressures, taller tires and less rolling resistence. Just food for thought.