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06-07-2008, 01:00 AM
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Youngest on HS :P
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d series transmissions
in my ef si, with a si tranny i get 100kmh in 5th @ 3000 ish rpm. in my dads ef si, with a dx tranny he gets 130kmh in 5th @ 3000 ish rpm. what gives
 could i put a dx 5th gear in my si case with 1,2,3,4 si and dx 5th gear? is there any other tranny with a higher ratio i could use?thx
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06-07-2008, 01:14 AM
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Admin with a big stick
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Yes you can do it, no I don't know for sure if there's a taller 5th. Our reference section should have specs for the D transmission ratios.
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06-07-2008, 04:16 AM
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#3 |
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Banned
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yes you can swap gears like that. The EX/SI D series transmissions all have shorter gears, which makes them quicker. VX/DX/LX trannys all have long gears, good for higher top speeds and better gas mileage.
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06-07-2008, 04:46 AM
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#4 |
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Senior Member
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You can swap gears but you won't notice a gain; the 1-5 in the DX is the same as the Si. The difference is the final drive; DX is 3.888 while the Si is 4.25. If you only want to change 5th; just drop in a HF 5th gear.
Also, lower revs don't always mean better MPG. I got 57mpg hwy while cruising at 4000rpm(70mph) and another user on HT and D-series.org noticed gains from switching to a shorter(numerically high) final drive ratio.
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1988 Honda Civic STD-more mods than I want to list Terrorists have successfully attacked our imagination. RIP Jon Eban Nie, August 31, 1991 - May 7, 2006 Y-Daniel Siu Eban, September 7, 1986 - May 7, 2006 |
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06-07-2008, 07:12 PM
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Youngest on HS :P
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hf is a crx right? well we dont have them in canada eh.
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06-07-2008, 08:33 PM
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#6 |
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here read this I know its long but its should help you understand gear ratios in honda trannys
bensebuilt |
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07-07-2008, 10:50 PM
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#7 | ||
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Youngest on HS :P
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I looked at a sticky and it says that the gearing is all the same but the final drive is differnt?
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