First impressions with the spool...
Thread Starter
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Joined: Jul 2001
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
First impressions with the spool...
Installed a spool differential (3.73 gears) in my '68 this week.. Went from a 4.11 posi to a 3.73 spool in my Tom's 12-bolt setup.. There was no major effect on the ET's but I didn't expect a huge difference. The main benefit of a spool setup is strength.. I was initially worried about making turns with the spool, but after driving around the pits a little bit, I didn't see a major problem. Turns just fine... Of course, you can feel some resistence when making turns but it's not too bad..
Last edited by GrandSportC3; Feb 10, 2008 at 11:25 PM.
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From: Corsicana, Tx
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I forgot about the new spool and 3.73's. Didn't seem to matter either way did it? Looks like MPH stayed the same and the ET actually improved a hair.
What RPM are you at in the traps at 144??
JIM
What RPM are you at in the traps at 144??
JIM
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
I'm trapping at about 6900 RPM, just shy of hitting the rev limiter at 7000 RPM.. I'll raise the rev limiter once I run a bigger shot..
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
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2017 C2 of Year Finalist
Aww c'mon....I'm spinning the 540 higher than that! Let's wing that thing a little!!
JIM
JIM
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
The engine is built to hold up to 8000 RPM but I really want to get some life out of it.. The engine also peaks at 6000 RPM and falls off after 7000 RPM. Long stroke small blocks don't like high RPM's too much.. It's not like a 377 (4.155 bore and 3.48 stroke) that revs to 8000+...
Race Director
Joined: Jan 2000
Posts: 13,011
Likes: 2,250
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
It'll like high RPM when you put the big heads on it some day!
Did it handle better with the new slicks?
Have you tried blocking off grille area to see if it goes faster?
JIM
Did it handle better with the new slicks?
Have you tried blocking off grille area to see if it goes faster?
JIM
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
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