06-07-2014 | #141 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: 4.10 gears...not what I expected.
Whether you have 4.10s or 3:45s, if both cars shift at the same 7000rpm, isn't the rpm drop based on the trans? Closed v Wide ratio trans.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
06-07-2014 | #142 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: 4.10 gears...not what I expected.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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06-07-2014 | #143 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: 4.10 gears...not what I expected.
so I guess we're done w this discussion.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
06-11-2014 | #144 |
Join Date: Jan 2010
Location: Mystic CT
Posts: 2,632
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Re: 4.10 gears...not what I expected.
Are the guts of a Dana 44 the same across applications? I know the housings differ.
In other words, should a competent guy who does Dana 44 work for off road trucks and Jeeps etc be able to work on a Corvette rear? Key word here is competent... Contemplating a change to 4.10s. |
06-11-2014 | #145 | |
Join Date: Oct 2004
Posts: 1,890
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Re: 4.10 gears...not what I expected.
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06-12-2014 | #146 | |
Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,446
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Re: 4.10 gears...not what I expected.
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I have a guy locally I trust a lot if you're looking for someone. |
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07-31-2014 | #147 | |
Join Date: Sep 2012
Location: Rockwall, Tx
Posts: 1,510
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Re: 4.10 gears...not what I expected.
Quote:
I'm wondering if your impression has changed any now that you've had it a month or so? Mine certainly did.
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07-31-2014 | #148 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: 4.10 gears...not what I expected.
Smooth cars are fast cars
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
08-01-2014 | #149 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: 4.10 gears...not what I expected.
Quote:
I too find the performance trade-offs interesting, as the advantages between the stock 3.45 vs. 4.10s goes back and forth, depending on what the immediate application is: Ami's 91 ZR-1 "Turq Monster" with 4.10s has approx 5% more hp than my 3.45 "Phoenix" and the combination of rear gear and brute hp tops my car in the quarter, every time. From the seat of the pants, it is a thrill to drive on the street and on country roads. However, in longer contests, the differences are less obvious. Case in point: Bob Banks' ZR-1 and my motors are pretty close, power wise: both @ or near the 510 chp range. However, Bob has 4.10s and I have the stock 3.45s in the rear. One example does not a trend make, but we ran side-by-side at the last 1/2 mile WANNAGOFAST event last June. What I observed I think might be pertinent to this discussion (my reason for sharing it): We started from a soft dig: more or less even. However, by the 1/2 way point (quarter mile), Bob had 3 to 3-1/2 lengths on me. I suspect Bob was still in 4th at that point, and had to shift into 5th as I was just shifting into 4th. That is when the gap began to close, and was whittled down to 1-1/2 to 2 lengths at the finish. In the end, Bob (4.10 gear) crossed the 1/2 mile trap at 138+ mph in 5th and the "Phoenix" with the 3.45s crossed at 144+mph, & still in 4th. However, in spite of gaining on him, he still beat me to the 1/2 mile finish! That initial lead afforded by the 4.10s was too much to overcome, in spite of a significant speed advantage the Phoenix had - at least at the 1/2 mile point. So, I dunno... Now having opportunity to experience both ratios; 4.10s vs. 3.45s, the each have their place. I like the snap Ami's car has when passing on the highway - and the extra 20-30(?) ponies at the wheels is just the cherry on top. But, I also like that long hard pull my car has to 90ish mph in 2nd gear, following a 5-2 downshift from about 45-50 mph. The 3.45 ratio delivers more torque to the rear wheels (above 75 mph) than the 4.10s do in 3rd, in spite of the 5% hp advantage, and without the additional shift too boot. So, depending on what or where one likes performance to kick in, moving to a 4.10 ratio might not be "the bee's knees". Having both to compare back and forth makes the distinction much clearer now, and I've cooled to the notion of 4.10s just a little, now that I have that and the 3.45 ratio to compare it with. Maybe 3.73s or 3.90s? And, (to the OP) so it goes.... Paul.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 08-02-2014 at 08:55 AM. Reason: grammar |
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08-01-2014 | #150 |
Join Date: Jun 2013
Location: Toronto
Posts: 783
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Re: 4.10 gears...not what I expected.
Paul what mph was the 'soft dig' from ? Rolling in 1st?
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