PerformanceTrucks.net Forums

New Members Come in and introduce yourself.

kinda new member

   
Old Feb 29, 2008 | 08:49 AM
  #11  
SixSpeedSS's Avatar
SixSpeedSS
Thread Starter
Staging Lane
 
Joined: Jun 2004
Posts: 92
Likes: 1
From: Pittsburgh, PA
Default
Originally Posted by TurboGibbs
I haven't done any "real" launches but with my 275/55-20's that are 32" tall and occasional towing, my 5.13's are perfect. 1900 rpm @70mph. I do have 29" slicks for the track.
the 32" tall tire makes the difference. I run a 27" tall tire (275/50-17) & with the 4.56s it does about 2200 rpm @ 70mph. The 3.73s did 1600 rpm @ 70mph - way too low.
Reply
0
Old Feb 29, 2008 | 08:57 AM
  #12  
TurboGibbs's Avatar
TurboGibbs
TECH Senior Member
iTrader: (6)
 
Joined: Jul 2005
Posts: 5,257
Likes: 0
From: Decatur, AL
Default
Originally Posted by SixSpeedSS
the 32" tall tire makes the difference. I run a 27" tall tire (275/50-17) & with the 4.56s it does about 2200 rpm @ 70mph. The 3.73s did 1600 rpm @ 70mph - way too low.
I had 3.73's when I first did the T56 swap. It was around 1200 rpm and 6th was almost worthless. I went to 4.30's and then settled on 5.13's
4.88's would have been ok if I didn't tow on occasions or if I had a big block like yours of course.
Reply
0
Old Feb 29, 2008 | 10:06 AM
  #13  
beastmode's Avatar
beastmode
Import Moderator
iTrader: (52)
 
Joined: Jul 2006
Posts: 7,041
Likes: 0
From: Pittsburgh, PA
Default
Hey Tod, Welcome to PT! Great group of knowledgeful (not even a word, i know lol) guys on here... glad youll be able to contribute to it
Reply
0
Old Feb 29, 2008 | 10:07 AM
  #14  
SixSpeedSS's Avatar
SixSpeedSS
Thread Starter
Staging Lane
 
Joined: Jun 2004
Posts: 92
Likes: 1
From: Pittsburgh, PA
Default
Originally Posted by TurboGibbs
I had 3.73's when I first did the T56 swap. It was around 1200 rpm and 6th was almost worthless. I went to 4.30's and then settled on 5.13's
4.88's would have been ok if I didn't tow on occasions or if I had a big block like yours of course.

The big block helps. I wish I could get 4.30s for the 9.5" rear. They'd be perfect.
Reply
0
Old Feb 29, 2008 | 10:30 AM
  #15  
AeroKing's Avatar
AeroKing
TECH Apprentice
 
Joined: Sep 2005
Posts: 325
Likes: 0
From: Steel City
Default
Welcome
Reply
0
Old Feb 29, 2008 | 05:13 PM
  #16  
chevyguy7802's Avatar
chevyguy7802
TECH Addict
iTrader: (3)
 
Joined: Dec 2006
Posts: 2,237
Likes: 0
From: Burleson,Texas
Default
Welcome to the site! Killer truck!
Reply
0
Old Feb 29, 2008 | 09:59 PM
  #17  
bpowell688's Avatar
bpowell688
TECH Apprentice
iTrader: (21)
 
Joined: Jun 2007
Posts: 317
Likes: 0
From: Texarkana, TX
Default
Welcome to Performancetrucks.net
Reply
0
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
New CK1500 owner......needs help already!
dsbodley
New Members
1
Nov 14, 2015 09:46 PM
Whirring noise...normal or an issue?
lukn4trbl355
INTERNAL ENGINE MODIFICATIONS
7
Oct 21, 2015 11:19 PM
J. Costello is a theif
Staggered 02
Member Feedback
6
Oct 9, 2015 05:19 PM
boost levels, dyno vs street, hot vs cold
Lthompson
FORCED INDUCTION
4
Oct 2, 2015 12:45 AM
Is this possible? My luck I'm assuming
trxmxzx
GM Drivetrain & Suspension
8
Sep 29, 2015 07:42 AM
Tags
Back to Subforum
New Members
View Next Unread
long tall whitey


Thread Tools
Search this Thread
Search this Thread:

Advanced Search

Advanced Search

All times are GMT -5. The time now is 07:05 AM.