Drag Racing Discussions > Front Engine Dragsters
Rear Tire selection
masracingtd1167:
--- Quote from: dusterdave173 on April 22, 2015, 06:28:52 AM ---Can't answer any of that but my 10.5 MT will spin with lower pressure and dead nut hook the slober out of your mouth at higher pressures that is the exact opposite of what that tire has done on my past door cars FWIW .
The dragster is way different in lots of ways--it really digs crazy loose converter--my door cars did not
The math for lower weight on rotating parts will astound you at the performance diff it Should make--I am like you --doing this for fun so who cares but...real racers pee before a run and take the spare change out of their pockets
--- End quote ---
Dave very interesting that your car spins more with less air pressure ! Could it be that with less air the center of the tire is not making as much contact with the track surface ? I pee before I run and I pee after I run ! I'm not sure if that makes me a real racer . I think it's just because i'm an old guy !!! Bill
dusterdave173:
I can't honestly say anything for sure--I have so few runs all on 4 different tracks so....The least run I made was at Rockingham--and the lowest tire pressure I have used so far and it hazed the tires off the line--really all could be in the tracks--early in year, test days , minimal prep--I need a season before I start making many judgements at all Fun as heck learning though!!
masracingtd1167:
--- Quote from: JakeB23 on April 21, 2015, 06:56:42 PM ---
--- Quote from: JrFuel Hayden on April 14, 2015, 09:46:32 PM ---After talking to slick manufactures and some racers that pointed out all the 10.5 tires are designed for the 10.5 door car classes. So I think the biggest difference in those tires is a lot stiffer sidewalls to handle 3000+ lb door cars and softer compound to work with "dead-hook, shift, dead-hook, shift," etc.
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I've never seen a 10.5 outlaw door car "dead hook" From my observation it's a controlled spin for the duration of the run.
Do you care to expand on this?
I have a couple of questions, and I don't want to hi-jack the post, but here goes.
Disclaimer, I am known as an over thinker, and I don't want to be a smarty pants, but I am always curious.
There are a couple of JR. Fuel, Heritage, 4.99 minimum dial in racers on here, and there are also some bracket racers/nostalgia index racers that aren't concerned about the fastest ET, but more consistency and running the dial.
So here goes. First, I see some opinions about "tire growth" but why do you really want a tire to grow? they way I see it, the more it grows, the less chance you have of having a flat contact patch? Wouldn't centrifugal force push the center out? Yes, I know NHRA top fuelers do this, but, they also have a huge wing.
Second, I don't exactly understand the big deal about tire weight? I seen on Jegs the 10.5 mickeys were 33 lbs and the 32 12 hoosier's (D05) are 28lbs. Yes, I know 5 pounds a tire is big when ET is in line, but if running an index or bracket, what does 5 pounds really matter?
Third, it seems that everyone wants their FED/Altered to "get up on the tire quick" and "wheel speed is king" Why wouldn't a stiff sidewall work here?
Just curious, not to be smart, all opinions welcome
Fire Away!
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Jake I tend to over think things too but that's what racing is all about ! When a tire grows it is like having an extra gear for more trap speed . For most of us this helps us go quicker ! The heavier a tire is makes it harder to accelerate . Lighter is always faster and 5lbs can make a big difference . I have never tried a stiff sidewall tire like the 10.5 but I think you would have to change some things to make it work . The quicker you can make your tire go round the faster you will go . I run a soft sidewall tire and at the hit the tire will squat and hit the bar and after a couple turns come up on the tire . This has worked the best for me ! I hope this helps ! Bill
wideopen231:
Another over thinker,normally gets me in trouble.
Stiff sidewall would seem to be able to go round sooner.In fact I talked with 3 different MT reps and they all recommended the 3074S over the 3074. On post I started on tire size so as not to hijack this one.I had comment on 14" wide weight being more than 12".Yes it is but not much,for some reason in the MT lineup there is lot less differance than in GY. Nothing against GY I have ran them for decades. I just want to try the MT's because of tons of good comment ont them from bracket guys.
I maybe over thinking it and come up bckwards will not be first time.Bad thing about thinking it thru you can make good reason for things to work on both sides of the coin. Reason I say the non thinkers are blessed, They don't come up with reason it will not work and just try it and eventually luck into something.
dreracecar:
The problem with tire reps is that many are not familier with front engine dragsters and what their needs are. Rear motor Comp & Super classes and door cars are what they see the most.
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