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Author
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Topic: Rear Gear for Supercharged Fox?
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FivePTSlow
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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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2011 GT/CS 5.0 + Boost(Procharger)
90 Bronco 5.8 Lifted
05 SRT-4 24PSI E-85 at least 50 million hp
07 Harley VROD NRS Stage 1
Posts: 1857 | From: Sacramento | Registered: May 2007
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50DADDY
CAFords OG
Member # 3076
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posted
Im thinking 3.73's and a 27/28 inch tall tire.
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"Im not stupid,i just act that way so i dont make you dummies uncomfortable."
"Old age and treachery shall overcome youth and skill."
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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Smoked50
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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.. ![[Wink]](wink.gif)
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1993 4 Cyl - 68 RWHP
I live my life a quarter mile at a time. For those 25 seconds or less, I'm free.
Posts: 2262 | From: EB | Registered: Nov 2009
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FivePTSlow
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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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2011 GT/CS 5.0 + Boost(Procharger)
90 Bronco 5.8 Lifted
05 SRT-4 24PSI E-85 at least 50 million hp
07 Harley VROD NRS Stage 1
Posts: 1857 | From: Sacramento | Registered: May 2007
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50DADDY
CAFords OG
Member # 3076
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posted
Im just saying 27" or 28" so you get the benefit of more sidewall.
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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FivePTSlow
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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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2011 GT/CS 5.0 + Boost(Procharger)
90 Bronco 5.8 Lifted
05 SRT-4 24PSI E-85 at least 50 million hp
07 Harley VROD NRS Stage 1
Posts: 1857 | From: Sacramento | Registered: May 2007
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50DADDY
CAFords OG
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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"Im not stupid,i just act that way so i dont make you dummies uncomfortable."
"Old age and treachery shall overcome youth and skill."
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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50Reasons
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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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50Reasons Car Club President
Daniel/50Reasons
http://youtu.be/n_UkDg_F4MQ
https://youtu.be/066xRvxKy-g
Posts: 9483 | From: Sacramento Ca | Registered: Jan 2006
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50DADDY
CAFords OG
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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"Im not stupid,i just act that way so i dont make you dummies uncomfortable."
"Old age and treachery shall overcome youth and skill."
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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50DADDY
CAFords OG
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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"Im not stupid,i just act that way so i dont make you dummies uncomfortable."
"Old age and treachery shall overcome youth and skill."
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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BIGBALLFACTOR
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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
Posts: 6908 | From: okc | Registered: Dec 2006
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50Reasons
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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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50Reasons Car Club President
Daniel/50Reasons
http://youtu.be/n_UkDg_F4MQ
https://youtu.be/066xRvxKy-g
Posts: 9483 | From: Sacramento Ca | Registered: Jan 2006
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50DADDY
CAFords OG
Member # 3076
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posted
Oh yes,it did require the infamous BFH,lol.
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"Im not stupid,i just act that way so i dont make you dummies uncomfortable."
"Old age and treachery shall overcome youth and skill."
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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FivePTSlow
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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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2011 GT/CS 5.0 + Boost(Procharger)
90 Bronco 5.8 Lifted
05 SRT-4 24PSI E-85 at least 50 million hp
07 Harley VROD NRS Stage 1
Posts: 1857 | From: Sacramento | Registered: May 2007
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nitrous_bob
CAFords OG
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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5.0 OG since 1990
Posts: 1402 | From: st clair shores MI | Registered: Nov 2000
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50DADDY
CAFords OG
Member # 3076
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posted
Sounds like you got it all going now too.Congrats. ![[patriot]](graemlins/patriot.gif)
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"Im not stupid,i just act that way so i dont make you dummies uncomfortable."
"Old age and treachery shall overcome youth and skill."
Posts: 4827 | From: Suckramento | Registered: Jul 2003
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Venomousnotch
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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...
![[burnout]](graemlins/burnout.gif)
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🏁•2004 MUSTANG SVT COBRA•🏁
"WHEN THE WHINING STARTS,IT MEANS JUSTICE IS ABOUT TO BE SERVED"..
Posts: 7604 | From: *NORTHERN*KILLA4NIA* | Registered: Oct 2008
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