T O P I C R E V I E W
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FivePTSlow
Member # 7682
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posted
Currently I'm running 3.27's and when I'm going through the traps at the 1/4 mile I'm in the mid to low 4k rpm range. Based on tire size calculators since I use a 26.5" tall tire I should run 3.73's to get the rpms into the mid 5k rpm range at the traps. It seems most of the threads I have read people seem to always recommend 3.55's for supercharged application.
I already have a lot of traction problems on the street now with 3.27's, so either way it will make it worse. This plus the fact that I just added aluminum heads and a holley systemax and 1.72 roller rockers.
Thoughts?
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50DADDY
Member # 3076
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posted
Im thinking 3.73's and a 27/28 inch tall tire.
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Smoked50
Member # 9592
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posted
quote: Originally posted by 50DADDY: Im thinking 3.73's and a 27/28 inch tall tire.
this, and get a Hoosier tire. Your traction problems will go away but you might have breaking axle problems..
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FivePTSlow
Member # 7682
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posted
quote: Originally posted by 50DADDY: Im thinking 3.73's and a 27/28 inch tall tire.
3.73's with a 28" tire is pretty much like running 26.5" tires on 3.55's. Well at least as far as crunching numbers is concerned.
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50DADDY
Member # 3076
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posted
Im just saying 27" or 28" so you get the benefit of more sidewall.
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FivePTSlow
Member # 7682
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posted
Well ive got two pairs of 26.5 slicks so ill probably go with 3.55 for now
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50Reasons
Member # 6452
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posted
Yea I recommend 3.55 with the 26.5 28s are too big and require cutting your rear quarters to make them fit
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50DADDY
Member # 3076
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posted
quote: Originally posted by 50Reasons: Yea I recommend 3.55 with the 26.5 28s are too big and require cutting your rear quarters to make them fit
What????????I ran 28's on my old Capri,they were only 9's though.
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50Reasons
Member # 6452
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posted
quote: Originally posted by 50DADDY: quote: Originally posted by 50Reasons: Yea I recommend 3.55 with the 26.5 28s are too big and require cutting your rear quarters to make them fit
What????????I ran 28's on my old Capri,they were only 9's though.
Your Capri had wider quarter panels right [ June 11, 2012, 09:54 PM: Message edited by: 50Reasons ]
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50DADDY
Member # 3076
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posted
quote: Originally posted by 50Reasons: quote: Originally posted by 50DADDY: quote: Originally posted by 50Reasons: Yea I recommend 3.55 with the 26.5 28s are too big and require cutting your rear quarters to make them fit
What????????I ran 28's on my old Capri,they were only 9's though.
Your Capri had wider quarter panels right
!!You know what?Thats absolutely right,didnt even consider that!But i had 275/60/15's on a few other stangs and im pretty sure thats a 28 inch tall tire.
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50DADDY
Member # 3076
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posted
Anyways,in my car im gonna go with 3.73's since id rather have a little too much gear and play with tire size rather than being stuck with too little gear.
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50Reasons
Member # 6452
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posted
I know guys at the track you had to cut part of the wheel well to get a 28.5x15 MT to fit
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SS396chevelle
Member # 7277
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posted
quote: Originally posted by 50Reasons: I know guys at the track you had to cut part of the wheel well to get a 28.5x15 MT to fit
no you don't have to cut anything to make the fit.just need a ford tool to make the fit
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50Reasons
Member # 6452
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posted
quote: Originally posted by SS396chevelle: quote: Originally posted by 50Reasons: I know guys at the track you had to cut part of the wheel well to get a 28.5x15 MT to fit
no you don't have to cut anything to make the fit.just need a ford tool to make the fit
Damn you right Dave a BFH
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50DADDY
Member # 3076
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posted
Oh yes,it did require the infamous BFH,lol.
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FivePTSlow
Member # 7682
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posted
I plan at some point to buy some wider wheel/tires for the back of my car, but until then I don't plan on hammering on anything. My dinky 26.5x8 slicks fit no problem as well as my 245 45 17's.
Might go to the track tomorrow just to see how much difference the heads intake, and 1.72 roller rockers made. On the street it feels about the same down low, but now in the upper rpms it really hauls! I'm running an a/t(a9p I think) computer and am starting to wonder if it has a redline? I know the factory tach's probably arent that accurate, but I've revved to 6500rpm according to the factory tach and no redline.
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nitrous_bob
Member # 77
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posted
im assuming you meant 26 x 10.5 right ?
i wouldnt do a single gear swap, its not worth it
if you drag race more than anything else i would do 3.73's or squirt a 50 shot on the blower and keep what you got
with a single gearset bump your only splitting hairs and changing your rpm by about 250
i think 3.73 would do you good tho
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50DADDY
Member # 3076
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posted
Sounds like you got it all going now too.Congrats.
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Venomousnotch
Member # 8695
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posted
quote: Originally posted by nitrous_bob: im assuming you meant 26 x 10.5 right ?
i wouldnt do a single gear swap, its not worth it
if you drag race more than anything else i would do 3.73's or squirt a 50 shot on the blower and keep what you got
with a single gearset bump your only splitting hairs and changing your rpm by about 250
i think 3.73 would do you good tho
+1 I agree 3:73 gears FTMFW...
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