Advantage of running bias ply front runners, ie M/T ET fronts - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 11 Old 06-21-2008, 06:13 PM Thread Starter
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Advantage of running bias ply front runners, ie M/T ET fronts

Can someone here please help me out here? I am ordering some front runners and don't know what the main advantage of having a bias ply tire, like the ET front and Moroso tire.

I run a bias ply et street in the back and i heard it is good to match the fronts. They are 3 times the price though. I can get a kumho 165 radial for 40 each and the M/T et fronts are like 130 each! wow. Is it worth it?


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post #2 of 11 Old 06-21-2008, 06:32 PM
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If it were me id stick to a radial in the front and save the cash for other modifications.

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post #3 of 11 Old 06-21-2008, 06:35 PM Thread Starter
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I heard that the bias ply tires might be more stable at higher speeds. Anyone have any experience using both types of tires?

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post #4 of 11 Old 06-22-2008, 02:02 PM
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I have a set of et fronts on my monocoques and a set of mastercraft 165 radials on my welds. I can not tell a difference between the two from a stability standpoint. I'm going through the traps just under 120 though, so there may be a noticeable difference at higher trap speeds. The main advantage I can see between the two is weight.

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post #5 of 11 Old 06-22-2008, 05:22 PM
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I did back to back runs with my street radials/street lites vs. mt drag front/bogarts and saw no et or mph difference. The mt felt slightly better on the big end but hardly a noticable difference.

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post #6 of 11 Old 06-23-2008, 07:58 AM
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There are three advantages.

1 is that there is a bigger selection of tire sizes. When you get into index racing and bracket racing, it helps to be able to use different size front tires to get better reaction times. In my case, I run a 24" tall by 4.5" wide Moroso front tire. This helps me cut .02 reaction times on the .400 pro tree. Basically the different tire sizes give you different rollout distances in the beams.

2 is safety. The moroso/MT tires are built to handle the high speeds whereas a 165R15 radial tire is only officially rated at like 95 mph.

3 is the stability at the higher speeds when running an ET Street/ET Drag type tire out back. Yes I noticed a difference at the top end of the track running 125 plus mph.

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post #7 of 11 Old 06-23-2008, 08:42 AM
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I notice a huge difference on the road and at the track with a matched set front to rear. With the radials up front they are moving all over the place on the hi-way, worse yet at the track. I notice it at about 100+ at the track, I am always trying to correct.

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post #8 of 11 Old 06-23-2008, 09:12 AM Thread Starter
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Im all about the saftey on the top end. This car is scarey enough coming off the line. I will probably go with the m/t fronts. What do you all prefer does 26" tall rub? I can go with a 25" also, but I would think 24" would be too small.

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post #9 of 11 Old 06-24-2008, 10:58 AM
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Quote:
Originally Posted by Karl Wesson View Post
Im all about the saftey on the top end. This car is scarey enough coming off the line. I will probably go with the m/t fronts. What do you all prefer does 26" tall rub? I can go with a 25" also, but I would think 24" would be too small.
26" is the common size and gives more rollout for those bracket racers that may be a little quick on the tree. It doesn't rub, basically 26" is about the same height as a 165R15 radial.

Carl S.: 417", Yates C3s, Edelbrock 2828, Dominator, Powerglide, 4.10s, 3100 lbs raceweight. 1.27 60' [email protected] nitrous on 275/60 Mickeys in Ultra trim
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post #10 of 11 Old 06-24-2008, 09:48 PM
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well from a tire guy... the technicality of it is, the cheapo radial is rated to 108mph (s/t) rated... but on flip side that is suppose to be able to sustain that speed consistent for 1 hour. The reason the radial/bias seems to be a bit squirly is radial belting and bias belting (hence name other than steel vs nylon) go different directions one goes across tire.. other is diagonal (in other words both react differently to flex and fight each other) same reason you shouldnt mix and match trailer tires it'll walk all over the road. A short pass on a strip is hard to notice till very top end. But if you drive it too and from track have fun

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post #11 of 11 Old 06-25-2008, 07:54 AM Thread Starter
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Quote:
Originally Posted by mustangjon View Post
The reason the radial/bias seems to be a bit squirly is radial belting and bias belting (hence name other than steel vs nylon) go different directions one goes across tire.. other is diagonal (in other words both react differently to flex and fight each other) same reason you shouldnt mix and match trailer tires it'll walk all over the road.
Thanks for the input that is a good explanation

1992 Notchback Black on Black 357W, TFS R Intake, 83 lb inj, Vortech T-Trim, Dynamic RacingC4, 656 RWHP @13 lbs; [email protected] 8 lbs/ [email protected] foot brake @13 lbs
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