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350EVO..........3.9 Final drive

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Old 12-08-2003, 02:32 PM
  #121  
zillinois
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Yes. 6 speed manual. Just need to know what the rpms are at 60mph in 5th gear (with the ring and pinion installed) if you could. Thanks
Old 12-08-2003, 02:32 PM
  #122  
PropaGanda
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He typed 60mph cruise in 5th so I would venture to say he is asking about the auto??? ::Shrug::
Old 12-08-2003, 02:40 PM
  #123  
FLY BY Z
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They may not know it is a 6 speed or for some reason want a 1:1 ratio for whatever they are doing. Either way, I think 60 would be right around 3K in fifth. I could def. be wrong. Maybe 3100. Hell, go drive it!
Old 12-08-2003, 02:52 PM
  #124  
zillinois
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Yeah thanks mr potato head I didn't think of that duh! I need the rpms with the ring and pinion installed. If I had it I would just go drive it.
Old 12-08-2003, 02:54 PM
  #125  
dwnshift
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If i was back at work I could tell you real quick. I ll get the answer.
Old 12-08-2003, 04:27 PM
  #126  
FLY BY Z
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Originally posted by zillinois
Yeah thanks mr potato head I didn't think of that duh! I need the rpms with the ring and pinion installed. If I had it I would just go drive it.
Oh sorry it should be around 3450 in fifth at 60 with the gears if stock is 3050 at 60 in fifth.

3.91*3100=12121
12121/3.53=3434
Old 12-08-2003, 04:57 PM
  #127  
zillinois
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Thanks Mr P.H..

We'll see how close you came when dwnshift replies.

Last edited by zillinois; 12-08-2003 at 05:00 PM.
Old 12-08-2003, 06:07 PM
  #128  
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Originally posted by zillinois
Thanks Mr P.H..

We'll see how close you came when dwnshift replies.
Gee whiz thank for the confidence.
Old 12-09-2003, 11:26 AM
  #129  
dwnshift
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Should have stuck with your first guess................drum roll please!

Its right about 3075-3100 RPM
Old 12-09-2003, 11:56 AM
  #130  
zillinois
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Most appreciated Dwnshift. This will help greatly in my cam selection process.

Yeah, the first guess is always the one to go with. That damn math just gets you thinking too much
Old 12-09-2003, 12:30 PM
  #131  
FLY BY Z
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Well my second guess was based of a stock gearing guess and that was wrong. Garbage in garbage out.
Old 12-09-2003, 02:22 PM
  #132  
uro279
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Originally posted by zillinois
Most appreciated Dwnshift. This will help greatly in my cam selection process.

Yeah, the first guess is always the one to go with. That damn math just gets you thinking too much
How does this relate to your cam selection process?

thanx
Old 12-09-2003, 02:30 PM
  #133  
zillinois
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Gearing shifts the rpm range of your engine. Cams have an rpm range which they are best suited. So, I needed to know how much the gearing shifted that range. I plug all this into a dyno simulation program I have to select the best grind, given the VQ's bore, stroke, cfm, gearing etc.
Old 12-09-2003, 03:15 PM
  #134  
FLY BY Z
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Don't keep your results secret.
Old 12-09-2003, 04:40 PM
  #135  
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I am presently inputting all the data to the build the engine so it will be a little bit before I can give any info out.
Old 01-30-2004, 09:01 PM
  #136  
phile
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I don't do alot of highway driving, but what rpm would I be cruisng at in 6th gear around 80mph?
Old 01-30-2004, 09:13 PM
  #137  
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Originally posted by little_rod
I understand what you are saying, but that is not the point of my post. Most people on this board will spend most of their time on the street, not the track. I am sure this is a wonderful mod for the track and I would love the 1st-5th gearing on my street car. But in an interstate cruise, it will cost you mpg cause the gearing will make the car run at a higher rpm.

All I was saying that while 6th is useless on the track, it is not useless to most people that own the car. Your gearing, with a taller 6th would be the perfect setup, and I would back that up by definitely buying that setup and I am sure I am not alone. Is it possible??
You are not alone. I have been wanting a shorter final drive, and a taller overdrive gear forever.
Old 01-30-2004, 09:43 PM
  #138  
Z1 Performance
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yeah but the cost of tearing down a tranny to replace a single gear.....you're getting into BIG buck territory.

This has obvious benefits, and only a minor tradeoff IMHO
Old 01-30-2004, 09:55 PM
  #139  
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Originally posted by Z1 Performance
yeah but the cost of tearing down a tranny to replace a single gear.....you're getting into BIG buck territory.

This has obvious benefits, and only a minor tradeoff IMHO
What kind of difference will this make in say 1/4 mile times??Cause I know 1st and 2nd gear when your boosted are REALLY short as it is..
Old 01-31-2004, 09:02 AM
  #140  
FLY BY Z
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I have maintained from the beginning that I do not think this is a good mod for drag strip or a car that sees much highway. This will be no doubt good for the road course. But off the road course you are looking at more shifting, worse mileage, more wear and tear, etc. We will only know when it's tested. I think the Z has too short of gears already. I still want to swap out rears with an auto touring. Somebody help me!


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