Economy difference between gearboxes
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Scooby Regular
Joined: Nov 2003
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From: Hampshire
Economy difference between gearboxes
"Economy difference between gearboxes"
May be an unusual question to ask but I am rebuilding a lightweight mid-engined sports to use a 93-94 JDM td05 WRX motor. I will be using a 4wd 5 speed manual box from a Subaru, converted to 2wd.
Haven't got the box yet, but I was interested in what sort of difference in economy you would expect to see in an Impreza at motorway speeds (70
) between say a UK spec box and say a RA/sti box with the shorter ratios.
The reason I am interested is the fuel tank in my car is pretty small.
May be an unusual question to ask but I am rebuilding a lightweight mid-engined sports to use a 93-94 JDM td05 WRX motor. I will be using a 4wd 5 speed manual box from a Subaru, converted to 2wd.
Haven't got the box yet, but I was interested in what sort of difference in economy you would expect to see in an Impreza at motorway speeds (70
) between say a UK spec box and say a RA/sti box with the shorter ratios.The reason I am interested is the fuel tank in my car is pretty small.
Scooby Regular
Joined: Oct 1999
Posts: 205
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From: Auckland NZ
When I had the original RA box in my WRX it was revving its nutz off at motorway speeds, awesome acceleration though ;p
I'm currently using a STi sedan gearbox and with 215-35-18 tyres it's doing approx 2700 rpm at 100Kph Vs 3500 rpm from memory with the RA box.
Also found that the RA box had such short ratios that often I needed to change up a gear mid corner....
I'm currently using a STi sedan gearbox and with 215-35-18 tyres it's doing approx 2700 rpm at 100Kph Vs 3500 rpm from memory with the RA box.
Also found that the RA box had such short ratios that often I needed to change up a gear mid corner....
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