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Re: [Opinions] 0.80 5th Gear Conversion -- 16v



On Wed, 27 Jan 1999, 16V JASON wrote:

> Hey gang...
> 	Subject says it all.  I might be doing the 0.80 5th gear swap in the next
> week or two--- but before I give my mechanic a final "OK", I wanted to ask
> around a bit.  For all of you who have done this before, some questions:
> 
> 1. What do you think?  Worth it?
depends on your priorities! fuel econo is good, top speed is good
but a bit less torque..
> 2.  How often do you have do downshift out of 5th on the highways, etc?  
depends the speed you're used! but around 120km/h it bad because
on the 4th gear you rev around 4000rpm (bit hi for fuel econo but good
torque for accel.) but in 5th gear the rpm is a bit too low for torque
but you surely have good fuel econo..
So If you are more over 120km/h you don't have to downsifht,
i'm usualy around 140km/h even if the limit is 100km/h!
> 3. How much more than you did *before*?  
Can't tell since I had the car like this... but the GTI I had before
was very different! even if my rocco is 16v and the GTI 8v, I do more
km with the rocco on the highway.
> 4. How slow can you cruise around in 5th on level ground?  I can do it at
> 30-32mph now with the 0.89 with no drama... will this increase to like 40,
> or like <gasp> 50? 
hmm, had to tell you right now since my caris in storage for the winter,
but I would guess around 40mph (but you will have no torque!)
> 5. How is the downshift from 5-4? And
Gives a big difference when you are not used to it, I mostly
shift 1 to 4th gear, but in 5th for long ride.. I'm kinda
sport driving attitude guy :) So i like accelleration!
> 6. Was there any increase in fuel economy?
You'll see the difference..
> 
> Plugging in the data from my Dyno runs, I'm looking in an overall reduction
> in torque of about 13% through most of the rev range-- which doesn't seem
> that drastic-- just wondering if it's worth the expense.
> 
> ...and all of you who have other 5th gear conversions, please also
> respond-- tell us which ratio you have, and what your impressions are... as
> well as engine speed at 70mph.  Thanks!!
that gives 112km/h to me the rev will be too low (around 3K), So I'm
always in 4th gear at this speed... but you will really see a diff
in fuel econo at that speed...
> 	
> 		Jason
> 
Hope that's helping you :)

/Joel
> 
> 
> 
> 
> ----------
> jason@scirocco.org
> 1987 Scirocco 16v
> 57,000 original miles.
> http://members.aol.com/rocco16v  
> 
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> 


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