What would you racers do? tire/gearing
02-11-2003, 09:36 PM
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What would you racers do? tire/gearing I'm pretty much set on going to 4.30 gears, but I'm having a tough time selecting a tire to run with it. Which tire would you guys pick?
-26x10x15 ET Drags: I know traction might be a problem with this tire, but when I do hook it would make for some good passes running higher in the rpms through the traps. Will this tire grow enough for me to run maybe 123mph and keep it under 6800-6900 rpms?
-28x9x15 ET Drags: This tire should make for some pretty consistent 60' times and I'll never have to worry about over reving, but is it too much tire for a 4.30 gear?
thanks,
Steve
-26x10x15 ET Drags: I know traction might be a problem with this tire, but when I do hook it would make for some good passes running higher in the rpms through the traps. Will this tire grow enough for me to run maybe 123mph and keep it under 6800-6900 rpms?
-28x9x15 ET Drags: This tire should make for some pretty consistent 60' times and I'll never have to worry about over reving, but is it too much tire for a 4.30 gear?
thanks,
Steve
02-11-2003, 09:40 PM
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Re: What would you racers do? tire/gearing For your trap speed and rpm range, definitely go with the 26" tires. Just make sure you mount them on some 10" wide wheels to get the full contact patch. You could probably run closer to 125 mph with that combo.
-Tony
-Tony
02-12-2003, 01:37 PM
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Re: What would you racers do? tire/gearing Check out http://www.f-body.org/gears/ . It looks like 4.30's with a 26" tire will max out at 126MPH in 4th at 7,000 rpms. So this may be cutting it a bit close, though there should be a little bit of tire growth. You may want to look into 27" tire which would give you 131MPH.
02-12-2003, 01:41 PM
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Re: What would you racers do? tire/gearing doubt he'd want to go into OD (he's an auto).
28's. Those 28x9's are actually like 27.1" tall and would grow to about 28", maybe a little more. personally, i wouldnt chance the 26's. 28's should hook a ton better.
Ryan
28's. Those 28x9's are actually like 27.1" tall and would grow to about 28", maybe a little more. personally, i wouldnt chance the 26's. 28's should hook a ton better.
Ryan
02-12-2003, 02:30 PM
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Re: What would you racers do? tire/gearing </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by FastAl:
<strong> Check out http://www.f-body.org/gears/ . It looks like 4.30's with a 26" tire will max out at 126MPH in 4th at 7,000 rpms. So this may be cutting it a bit close, though there should be a little bit of tire growth. You may want to look into 27" tire which would give you 131MPH. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I prefer the calculator at Smokemup.com. It takes converter slip into account. I've been using 4% slip just so there is no surprises at the strip. But, I just got off the phone w/ Mickey Thompson with some good news. They said that the 26x10 on my 15x8 rim will start out at around 26.2" and then at my trap speed range I should see around .8"-1" growth which will give me a 27-27.2" tire to work with. So now taking into account a 4.30 gear, 27" tire, and 4% slip I won't hit 7000rpms until 126mph. Which should be perfect, now all I have to worry about is traction off the line. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
thanks for the reply,
Steve
<strong> Check out http://www.f-body.org/gears/ . It looks like 4.30's with a 26" tire will max out at 126MPH in 4th at 7,000 rpms. So this may be cutting it a bit close, though there should be a little bit of tire growth. You may want to look into 27" tire which would give you 131MPH. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I prefer the calculator at Smokemup.com. It takes converter slip into account. I've been using 4% slip just so there is no surprises at the strip. But, I just got off the phone w/ Mickey Thompson with some good news. They said that the 26x10 on my 15x8 rim will start out at around 26.2" and then at my trap speed range I should see around .8"-1" growth which will give me a 27-27.2" tire to work with. So now taking into account a 4.30 gear, 27" tire, and 4% slip I won't hit 7000rpms until 126mph. Which should be perfect, now all I have to worry about is traction off the line. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
thanks for the reply,
Steve
02-12-2003, 02:41 PM
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Re: What would you racers do? tire/gearing Keep us posted sounds very interesting.
My only concern is inconsistent 60ft's with the narrower tires... y'know, those days when the track is just too greasy?
How about a 4.56, OD, and 28x11.5x15 QTP's on 15x10's, what can I trap?
My only concern is inconsistent 60ft's with the narrower tires... y'know, those days when the track is just too greasy?
How about a 4.56, OD, and 28x11.5x15 QTP's on 15x10's, what can I trap?
02-12-2003, 02:47 PM
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Re: What would you racers do? tire/gearing </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryan:
<strong> doubt he'd want to go into OD (he's an auto).
28's. Those 28x9's are actually like 27.1" tall and would grow to about 28", maybe a little more. personally, i wouldnt chance the 26's. 28's should hook a ton better.
Ryan </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The 28's are very tempting. I know for sure that I'll be able to hook on those, but I don't want to put up a good 60' only to be lugging through the traps because they grew more than I thought they would.
If I were bracket racing every week, for sure I would go 28's. Right now the only thing on my mind is a 10 second time slip, which is making me lean towards the 26's.
Although, has anyone ran into a tire that for some reason just didn't grow like it was supposed to?? I mean 10's are important to me, but I don't feel like shelling out for new internal parts anytime soon.
hmm... decisions, decisions. Keep the opinions coming guys.
thank you for your input Ryan
Steve
<strong> doubt he'd want to go into OD (he's an auto).
28's. Those 28x9's are actually like 27.1" tall and would grow to about 28", maybe a little more. personally, i wouldnt chance the 26's. 28's should hook a ton better.
Ryan </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The 28's are very tempting. I know for sure that I'll be able to hook on those, but I don't want to put up a good 60' only to be lugging through the traps because they grew more than I thought they would.
If I were bracket racing every week, for sure I would go 28's. Right now the only thing on my mind is a 10 second time slip, which is making me lean towards the 26's.
Although, has anyone ran into a tire that for some reason just didn't grow like it was supposed to?? I mean 10's are important to me, but I don't feel like shelling out for new internal parts anytime soon.
hmm... decisions, decisions. Keep the opinions coming guys.
thank you for your input Ryan
Steve
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02-12-2003, 03:08 PM
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Re: What would you racers do? tire/gearing </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> Keep us posted sounds very interesting.
My only concern is inconsistent 60ft's with the narrower tires... y'know, those days when the track is just too greasy?
How about a 4.56, OD, and 28x11.5x15 QTP's on 15x10's, what can I trap? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">John, I'm not sure if I understand? by OD do you want to know how high you trap in overdrive?
btw, hows your car coming along?
Steve
<strong> Keep us posted sounds very interesting.
My only concern is inconsistent 60ft's with the narrower tires... y'know, those days when the track is just too greasy?
How about a 4.56, OD, and 28x11.5x15 QTP's on 15x10's, what can I trap? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">John, I'm not sure if I understand? by OD do you want to know how high you trap in overdrive?
btw, hows your car coming along?
Steve
02-12-2003, 03:23 PM
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Re: What would you racers do? tire/gearing Just curious with stock 4L60E and a 4.56 and 28x11.5x15 QTP what rpms I would do thru the traps with less than 5% converter slippage.
Car is under wraps and will be out at BG on May 31st.
Car is under wraps and will be out at BG on May 31st.
02-12-2003, 03:38 PM
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Re: What would you racers do? tire/gearing well, I believe the DOT tires are only good for about 1/2-3/4" growth. So using a 4.56, 28.75" tire(growth accounted for), and 5% converter slippage 3rd gear would be 116mph@6500rpms, 125mph@7000rpms, and 134mph@7500rpms. Add 1mph per set of rpms for each 1% decrease in converter slip.
So, when is the grand unvailing of your selection of parts for your combo? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Steve
So, when is the grand unvailing of your selection of parts for your combo? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Steve
02-12-2003, 03:53 PM
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Re: What would you racers do? tire/gearing I'm a pretty good example for you. I was running 4.10's with 26X10X15 Hoosiers on 15X10's, the TP4400, and was trapping 125. I would hit the rev limiter just after the 1/4, probably around 126-127MPH. PERFECT GEARING. But I couldn't consistently hook them up. I want 1.4's or better everytime. Sometimes I'de pull mid 1.5's. <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
Now I swapped in the 12 bolt and opted for 4.30's and 28X10 Hoosiers. You're better off getting traction and good 60's even if you slow down just a bit on the big end. I'm kind of curious what MPH this combo will pull. Should take me to 130MPH NA. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Now I swapped in the 12 bolt and opted for 4.30's and 28X10 Hoosiers. You're better off getting traction and good 60's even if you slow down just a bit on the big end. I'm kind of curious what MPH this combo will pull. Should take me to 130MPH NA. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
02-13-2003, 12:37 AM
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Re: What would you racers do? tire/gearing thanks Tony, so the 26's would definitely give me enough growth to possibly go 125 without seeing 7k?
Steve
Steve
02-13-2003, 06:16 AM
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Re: What would you racers do? tire/gearing thanks, Jantzer
I do kinda get pissed off when the car is only hooking good in like 1 of 3 passes.
still not sure yet,
Steve
I do kinda get pissed off when the car is only hooking good in like 1 of 3 passes.
still not sure yet,
Steve