Diff Selection for HG 308 - Holden General Discussion

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Fastlane » Holden Forums » Holden General Discussion » Diff Selection for HG 308

Diff Selection for HG 308

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Guest		#1 Posted : Monday, 21 March 2005 12:59:05 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		Im running a warm to hot 308 in a hg prem, in front of a turbo400. Im yet to get a replacement yoke to fit the tailshaft to accomodate the turbo400, but thats another story. Just writing to ask what would be the best option for a diff in this case? Im not looking for anything terribly smooth, or terribly rough, just something that'll take some throttle. The turbo400 is operating with a 4500 stall converter, so the engines not built for cruising, just to let you know, but it will be used on the street. Any help would be great. Simon

HK1837		#2 Posted : Monday, 21 March 2005 4:17:28 AM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered, Veteran Joined: 1/03/2005(UTC) Posts: 14,738 Thanks: 1 times Was thanked: 515 time(s) in 491 post(s)		I know that a VB-VK 10-bolt is around an inch shorter either side. These are strong but will break, even though you're only running a 308 which won't produce the torque of a bigger engine. The TH400 will soften the output slightly too. Another diff that i
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Guest		#3 Posted : Monday, 21 March 2005 6:39:36 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		can you suggest a ratio? i've been told the 3.55's are good for takeoff but killers on the highway. a 3.35 was also suggested. thanks

Dr Terry		#4 Posted : Monday, 21 March 2005 4:41:56 PM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered Joined: 1/03/2005(UTC) Posts: 6,066 Thanks: 1 times Was thanked: 205 time(s) in 186 post(s)		Hi HG_Prem. It depends on the duration of your camshaft & what inlet manifold you're using, but either the 3.36 or the 3.55 will be your choice. Dr Terry
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