Front runners, how much faster?

[Padre]

Just want to point out that the 225/60-18 tires are not speed rated well for drag racing.

The Ultima's are H, 130 mph.

The Firestones are T, 118mph.

I wouldn't use them.

Padre

[Stephen12ZL1]

Originally Posted by Pro Stock John

Whats the weight of a MH 28 + 17x4.5 Weld RTS?

Stock 20x9 + Pirelli is 62 lbs right?

I will be able to tell you in about a week. With the M&H radials 185/55-17, they weighed 33lbs apiece. I think the bias ply M&H's are slightly lighter. I will guess 30lbs each RTS/M&H skinny bias ply.

[blazzin1]

When I used to have the RT-S (S71's) on my car....

The front 17x5" wheel with a mounted M&H 4.5/28-17 bias ply tire was 33.0 lbs. Stock front 20x8 with Pirelli weighed 63.5 lbs. Weight savings of 61.0 lbs. on the front axle.

The rear 17x10" wheel with a mounted M&H 325/45R17 drag radial was 55.5 lbs. Stock rear 20x9 with Pirelli weighed 68.0 lbs. Weight savings of 25 lbs. on the rear axle.

All-in-all.....total weight loss with the RT-S (S71's) and M&H tires was 86.0 lbs.

Now I have the S76's on order.....wondering if they will weight any less than the S71's???

[Pro Stock John]

I'm good on the weights at this point, I know the MT radial fronts in a 28 will weight a bit more than the bias play MH's.

If the MH's are anything like the Moroso DS2 fronts I'll wait for the MT radials. I had the DS2's and they were great for drag racing but I have a tendency to leave skinnies on for long periods of time, and, well, the bias ply smooth fronts tend to drive like bald tires.

[grocerygetter]

Originally Posted by Padre

Just want to point out that the 225/60-18 tires are not speed rated well for drag racing.

The Ultima's are H, 130 mph.

The Firestones are T, 118mph.

I wouldn't use them.

Padre

I think the general altimax hp would be fine. I don't run the quarter around here...maybe a trip to LA or Fest this year other than that we have a 1kft track. I'm trapping 119-120 there @8.71. I exceeded the limit on a 165vw tire on my 15" skinnies on my GN.

Rhino has been coaching me to change wheel/tire combo so I think I will end up with a 17" and true 28" front runner.

[VADER SS L99]

Originally Posted by Padre

Just want to point out that the 225/60-18 tires are not speed rated well for drag racing.

The Ultima's are H, 130 mph.

The Firestones are T, 118mph.

I wouldn't use them.

Padre

To my knowledge there are no radial front runners that are higher than "H". Even if someone was running 140mph trap speeds on a H tire they will only be at that speed for maybe 2 seconds then back down. The ratings are for constant speeds. You wouldn't want to roll race or Texas mile them but for 1/4 they are probably rated higher than most of the bias ply front runners as far as constant speed. Think about how fast you and others go on your MT ET streets or NT05R's. I bet those drag radial tires are not rated higher than H for constant speeds especially since most people only run 18psi in them and that lowers the max constant speed rating. In other words I think it would be perfectly safe to run a "H" at the track even if you have a 9 second car.

[Denis]

Originally Posted by VADER SS L99

To my knowledge there are no radial front runners that are higher than "H". Even if someone was running 140mph trap speeds on a H tire they will only be at that speed for maybe 2 seconds then back down. The ratings are for constant speeds. You wouldn't want to roll race or Texas mile them but for 1/4 they are probably rated higher than most of the bias ply front runners as far as constant speed. Think about how fast you and others go on your MT ET streets or NT05R's. I bet those drag radial tires are not rated higher than H for constant speeds especially since most people only run 18psi in them and that lowers the max constant speed rating. In other words I think it would be perfectly safe to run a "H" at the track even if you have a 9 second car.

and not a lot of us are even trapping that high. like im hoping to run 11's this spring. i think i trapped like 113 last time i ran, so im not tooooo worried about that.

[grocerygetter]

Originally Posted by Pro Stock John

I'm good on the weights at this point, I know the MT radial fronts in a 28 will weight a bit more than the bias play MH's.

If the MH's are anything like the Moroso DS2 fronts I'll wait for the MT radials. I had the DS2's and they were great for drag racing but I have a tendency to leave skinnies on for long periods of time, and, well, the bias ply smooth fronts tend to drive like bald tires.

You hear anything on yellow bullet or elsewhere about the availibility time for the mt front runner radials in 17x28?

[Padre]

Originally Posted by VADER SS L99

To my knowledge there are no radial front runners that are higher than "H". Even if someone was running 140mph trap speeds on a H tire they will only be at that speed for maybe 2 seconds then back down. The ratings are for constant speeds. You wouldn't want to roll race or Texas mile them but for 1/4 they are probably rated higher than most of the bias ply front runners as far as constant speed. Think about how fast you and others go on your MT ET streets or NT05R's. I bet those drag radial tires are not rated higher than H for constant speeds especially since most people only run 18psi in them and that lowers the max constant speed rating. In other words I think it would be perfectly safe to run a "H" at the track even if you have a 9 second car.

I agree, just that there was some discussion about tech at sanctioned events. I'm sure an MT, M&H, etc. would pass, but I don't know about street tires like the ones above.

Padre

[Pro Stock John]

John S, I have not, but a few guys have sets on order so I'm sure they'll post updates as they get them. My local tracks don't open for another 1.5 months or more so I'm just chillin'.

[grocerygetter]

I'll probably be ready to order here in a week or so and I will call Summit and see what they say then...I'll post up if I here anything as well. I'm honestly leaning towards a M&H bias ply for weight drop. I drive 40 min to the track and back...my understanding is if I leave the car on them to leave them aired up super tight so they don't flat spot.

[shiznight]

Friend of mine locally jeremiah carter shaved almost .3 off his 1/4 in his g8 with front runners. they are worth the money. what most need to understand is there is a diminishing return the faster you go, so some will see less of a gain than others with a faster speed. but to most of us who are in the bolt on range to nitrous 120mph trap area skinnies make a huge difference. i recently swapped v6 brakes and am running the gto spare with bias ply tires and i can tell you the front end feels like it wants to lift when i hit it. unfortunately it's too cold here for the tracks to open for me personally

[62nalide]

Originally Posted by shiznight

Friend of mine locally jeremiah carter shaved almost .3 off his 1/4 in his g8 with front runners. they are worth the money. what most need to understand is there is a diminishing return the faster you go, so some will see less of a gain than others with a faster speed. but to most of us who are in the bolt on range to nitrous 120mph trap area skinnies make a huge difference. i recently swapped v6 brakes and am running the gto spare with bias ply tires and i can tell you the front end feels like it wants to lift when i hit it. unfortunately it's too cold here for the tracks to open for me personally

You kinda broke even V6 brakes weigh more than the stock ones.

EDIT: They are 20lbs lighter

[Rhino79]

For what its worth, the GTO spares with 26-17 mh bias front runners weighs 26.4 lbs.