Dunlop DAH vs Bridgestone YGC

Guy Barrett · Posted: Wed Aug 15, 2001 4:31 pm Post subject: Dunlop DAH vs Bridgestone YGC

How do any of you find these two tires compare ? Niether has an SL designation and both are mid range tires in terms of grip according to the manufacturers.Anyone ?

Mark Dismore Jr · Advertiser Joined: 21 Jul 2001 Posts: 1096

quote:
Originally posted by Guy Barrett:
How do any of you find these two tires compare ? Niether has an SL designation and both are mid range tires in terms of grip according to the manufacturers.Anyone ?

Actually the YGC is considered an SL tire and is marked on the sidewall that way. The DAH is a little softer then the YGC but they both are very good tires and should work well in the August heat.

Mark

Comet Kart

Mark Dismore Jr · Advertiser Joined: 21 Jul 2001 Posts: 1096

quote:
Originally posted by Guy Barrett:
I dont see an SL marked on the tire , only an FMK enduro designation on the YGC. With my durometer the DAH is 3 points HARDER than the YGC. What I'm looking at is,are these two tires equal enough in terms of performance to be included together in a tire rule ?

[ August 16, 2001: Message edited by: Guy Barrett ]

It used to say SL Enduro, not FMK Enduro, that's odd. But we do get whatever the europeans tell the tire companys they want. It just trickles our way. As far as the tires being equal according to the rules, I don't know what series you are running or the rules to make an educated guess on that.

Guy Barrett · Posted: Thu Aug 16, 2001 10:08 am Post subject: Dunlop DAH vs Bridgestone YGC

I dont see an SL marked on the tire , only an FMK enduro designation on the YGC. With my durometer the DAH is 3 points HARDER than the YGC. What I'm looking at is,are these two tires equal enough in terms of performance to be included together in a tire rule ?

[ August 16, 2001: Message edited by: Guy Barrett ]

Brant Williams · Posted: Sat Aug 18, 2001 5:31 pm Post subject: Dunlop DAH vs Bridgestone YGC

Guy,

Out west we raced YFC's during the 1999 season, and DAH's for many classes at the 99 GN's in Santa Maria.

The Stones were a little slower...I think this was due to tire construction and sidewall characteristics...especially on a gripped up track.

DAH's were a bit faster (.2-.3s at Santa Maria) but had terrible fall off after 2-4 heat cycles. Just before the GN's and during practice days for the GN's many would only run the DAH's 3 or 4 sessions before I went to a new set bcause they started to fall of noticibly. Also, they were always about .10-.15s faster on your first (sticker tire) session.

I liked the feel of the DAH's better. They were stiffer, and that made the car respond better to chassis changes. But I like the Stones better for RACING. They were more consistent over a race day, and you could still use them in a meaningful way for testing after 5+ heat cycles. The DAH's were worthless in that respect.

This was how they compared in 1999. The "G" carcass is a little different, and the compounds may have changed. If they have not changed, I would NOT recommend allowing the same two tires in the same class. Everyone will be forced to use DAHs, and use more of them. I don't mean to slam Dunlop (SL4's are the best for most road race classes)...but this was how it played out in 1999.

Jimmy Moore · Joined: 26 Jul 2001 Posts: 664

Brant, I've been overheating my YGCs and I was considering a switch to YDS but I'm afraid they'll be so much harder that I won't get any traction. Is there a big difference between the two?

Rick Restell · Joined: 20 Jul 2001 Posts: 4 Location: Victoria, BC, Canada

So, are you replacing those Dunlops with YGC's or what? Your competitors read these forums too you know.

Dave Embry · Posted: Tue Aug 21, 2001 3:22 pm Post subject: Dunlop DAH vs Bridgestone YGC

The old C's are referenced on the cross reference chart I have as having a durometer reading of 50 and are shown to be the same as the Dunlop SL3. Don't know how the G's changed for the Stones durometer.

Jimmy Moore · Joined: 26 Jul 2001 Posts: 664

The chart that's in the CKS cataloge has the YGC at 58 duro SL4 at 60 and the SL3 alot harder at 64.

Tim Doll · Posted: Tue Aug 21, 2001 5:46 pm Post subject: Dunlop DAH vs Bridgestone YGC

quote:
Originally posted by Jimmy Moore:
I've been overheating my YGCs and I was considering a switch to YDS but I'm afraid they'll be so much harder that I won't get any traction. Is there a big difference between the two?

There is a huge difference between the YGC and YDS. If you are looking for something a little harder than the YGC, I'd suggest the Dunlop SL4. I run SL4's in roadrace and I think they are great - even in one hour races the SL4's hold up on all but the hottest days.

Tim

Bill Martin · Posted: Tue Aug 21, 2001 6:34 pm Post subject: Dunlop DAH vs Bridgestone YGC

Tim,
Do you (or others) have any data on MG Yellows, aka Mission region SKUSA spec for most classes? Compared to Dunlop SL4? The MG's, at least for me, seem to hold up very well. I know, I should go faster...whatever! :-)

Bill

quote:
Originally posted by Tim Doll:

There is a huge difference between the YGC and YDS. If you are looking for something a little harder than the YGC, I'd suggest the Dunlop SL4. I run SL4's in roadrace and I think they are great - even in one hour races the SL4's hold up on all but the hottest days.

Tim

Charlie Tackett · Posted: Wed Aug 22, 2001 4:58 am Post subject: Dunlop DAH vs Bridgestone YGC

I think Brant makes some excellant points. While you could spec a group os tires based upon a narrow range of duromtere readins, other factors affect a true comparison. Sidewall construction/rigidity, consistency both over a long run and thru heat cycles, etc. Are all factors that may make one tire compound better in a given situation over another that may have the identical durometer reading. Having said that, I still prefer the method of spec'ing a group of "similar" tires over spec'ing a single compound. Let teh racer choose from the group based on what works best from them or what they can get the best deal on or whatever.

We have been very pleased at the performance of the MG yellows in RR a sprint shifter. However in many of the other RR classes, the MG Reds are much more common. From casual observation, I would guess the SL4s and the Reds are probably the two of the most common RR tires around here.

Charlie Tackett · Posted: Wed Aug 22, 2001 5:03 am Post subject: Dunlop DAH vs Bridgestone YGC

I think Brant makes some excellant points. While you could spec a group os tires based upon a narrow range of duromtere readins, other factors affect a true comparison. Sidewall construction/rigidity, consistency both over a long run and thru heat cycles, etc. Are all factors that may make one tire compound better in a given situation over another that may have the identical durometer reading. Having said that, I still prefer the method of spec'ing a group of "similar" tires over spec'ing a single compound. Let teh racer choose from the group based on what works best from them or what they can get the best deal on or whatever.

We have been very pleased at the performance of the MG yellows in RR a sprint shifter. However in many of the other RR classes, the MG Reds are much more common. From casual observation, I would guess the SL4s and the Reds are probably the two of the most common RR tires around here.