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Guest Message by DevFuse

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Taller 5th Gear?

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16 replies to this topic

#1 dsmracer


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Posted 23 September 2003 - 12:14 AM

After some freeway driving, I've noticed that the 55 MPH speedlimit gear ratio of 5th is too short for Cali's current 65 MPH limit. Even worse is the 75 MPH flow of traffic. Is there a taller 5th gear from another car I could use?

#2 calebz


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Posted 23 September 2003 - 12:35 AM

whats your rpm @ 70?.. mine sits comfortably at 3200 or so.. if you think the 5 spd is bad, try the 3AT.. 400-4100 @ 70.. yuck

#3 dsmracer


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Posted 23 September 2003 - 12:55 AM

At 70 my revs are around 3500. Too high since I prefer to go 75. Especially since I plan on taking this thing on snowboarding trips.

#4 Snowman


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Posted 23 September 2003 - 01:53 AM

3500 sounds high, but really, why is it bad?

I recently went on a 2,000 mile trip in my subaru, usually running between 75 and 90 mph for hours on end. If I remember correctly, it was turning around 4,000rpm most of the time. No ill effects whatsoever. Oil pressure and coolant temp stayed rock solid the whole time, my gas mileage didn't suffer excessively, and the car runs better now than before because all the carbon is now gone from the motor.

Subaru engines LIKE to be run hard!

#5 SubaRube


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Posted 23 September 2003 - 09:53 AM

I was thinking the same thing. They share that quality with their illegitimate ancestor, the air-cooled VW. The only way to really get any performance out of it, is to rev the crap out of it. :D

It would be nice to have a highway gear though. Would a larger tire give you a little help with the RPM's?

#6 Setright


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Posted 23 September 2003 - 10:17 AM

Larger tyres would make a difference, but also to the speedo and odo readings and therefore would be illegal. Anyway, you need a massive difference to make it count and the wheel wells are only so big...

I normally cruise at 150km/h (ca. 93mph) and that puts the rev counter smack on 4500rpm. Engine doesn't sound stressed, or even loud, and returns 10.2 km/l - for hours on end.

6.338miles per liter, 3.785 liters per customary gallon, let's see that should equate to roughly 24 mpg.

Or 4.546 liters per Imperial gallon: 29mpgUK

I'm not complaining......oh and don't forget that the short stroke on most Sube boxers means that the average piston speed is relatively low.

#7 Forkspear


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Posted 23 September 2003 - 10:23 AM

My rpms are at 3700 at 75 in my RX. Im usually going faster than that. I have 185/80/r13 tires on an 89 GL and it throws the speedometer off about 5 mph at 75. So when the speedometer says 70 you are really going 75.

#8 Qman


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Posted 23 September 2003 - 10:24 AM

You will find that almost all Subaru speedos are off. I know several people who have installed 14" pugs and tires and found that their speedo was now accurate. I know of zero gears that are compatible with the Sube gearbox.

The RPM's sound perfect. Redline is much higher(5,500)

#9 Sweet82


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Posted 23 September 2003 - 11:10 AM

I don't want to hear all this whinning.

What about those of us with D/R 4sp?
Mine does 55mph at 3000:boohoo:

My car has never been over 75 mph:boohoo: :boohoo: :boohoo: (74mph on her final on road run)

At least you guys have a 5th gear:mad:

Ok, I'm through whinning now.

82 Hatch, slowbaru.....:boohoo:
01 Forester, fastbaru..:banana:

#10 eyesore


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Posted 23 September 2003 - 12:54 PM

Here's how you achive that: get going fast as she'll go on the highway, (75) let a big rig pass you, quickly jump behind him. Shot my Gen-1 wagon to 85!! it was like a shot of N2O!
I could actually feel, by the seat of my pants, when I was loosing the draft. With a little work, I could let the truck suck me along at about 1/4 throttle.

#11 WJM



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Posted 24 September 2003 - 06:46 PM

High RPMs dont hurt suby motors. Even the EJ motors. ON the same trip, about 300 some miles, average speed was about 80-80 MPH, for about 4-5 hrs stright. the first time was in a 96 EJ25 DOHC powered outback...no problems. the second time was in my GL-10 turbo wagon with its 9.5:1 turbo motor...RPMs were around 3600 to 4000. No problems. I dont remember RPMs on outback...i think it was around 3400.

#12 dsmracer


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Posted 24 September 2003 - 07:04 PM

I'm not too worried about hurting the motor. Just getting crappy gas milage. And at $2.30 for a gallon of camel piss 91 octane, I'd pefer to conserve as much as possible.

#13 MilesFox


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Posted 25 September 2003 - 11:48 AM

the 3500 rpm is where the soob motor is most happy. its right smack in the middle of the power band.

if you were cruising a taller gear at a lower rpm, you might find your foot in the gas more to keep it moving. 3500 rpms is the most efficient rpm, the most power with least throttle, from my experiences.

even crawling around off road in low gar at 5 mph, i t does best at 3000-3500 rpms, all the way up to 4500

#14 Tin Soldier

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Posted 25 September 2003 - 01:00 PM

I ran my gl-10 with the cruise on 80 for about 6 hours straight with no problems. I think rpms were between 3500 and 4000 that's with a full time 4wd 5spd 3.90 ratio

#15 Dennis ex24

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Posted 25 September 2003 - 02:27 PM

the bottom end in EA motors could handle 8 grand all day long - but its not fuel effiecient.

in short they were made to be beat on

#16 P K


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Posted 25 September 2003 - 03:33 PM

...nothing a good set of 14" Peugeot alloys and 195x70s couldn't cure. I think they are the perfect size for stock. I have them on my 82 Brat now, and it purrs beautifully at 75mph. (boy, I miss the Loyale too). I found a set at the Oceanside Ecology yard, just a skip from Encinitas for $170. I might sell these with caps, lugs, and tires (50%) for $200. Let me know if interested. r/PK
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#17 Hodaka Rider

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Posted 25 September 2003 - 05:09 PM

If you want good mileage, buy a diesel. 2003 VW Jetta TDI = at least 650 to 700 miles per 14.5 US gallons at the speeds you're doing.

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