Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

srr 4.7 or 4.9 final drive for d series s20 tranny?

 
Old 07-30-2004, 10:36 PM
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Default srr 4.7 or 4.9 final drive for d series s20 tranny?

which srr final drive would you get for your ex/si tranny 4.7 or 4.9? I have no idea how the gearing would be, anyone have any ideas? 5th gear 4k-4200 rpm at 80mph would be streetable for me. Anyone have any experiences with srr or any other companies?

Thanks
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Old 07-30-2004, 11:59 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (NINJASPY)

bump....id like to know as well
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Old 07-31-2004, 12:05 AM
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Id get the 4.7 cause the 4.9 is mostly for auto X. and the 4.9 would drastically bring down your top speed. and if you are going for drag race. if my thinking and timing is right a 4.9 FD would be sending u down the quarter in 5th gear.
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Old 07-31-2004, 01:37 AM
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Default Re: (JDMlyfestyle)

I've got the JDM 4.785 FD in my Civic and I'm topping out 4th gear at slighly over 100mph.
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Old 07-31-2004, 04:31 AM
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i got the 4.785 FD too. i trap 100mph in 4th gear in the 1/4. but u gotta remember this guy is talking about a D series tranny. not a b series. the d series are geared differently
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Old 07-31-2004, 06:52 AM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (NINJASPY)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NINJASPY &raquo;</TD></TR><TR><TD CLASS="quote">which srr final drive would you get for your ex/si tranny 4.7 or 4.9? </TD></TR></TABLE>

4.9

http://www.autocrossing.com/cgi-bin/gearcalc.cgi

http://home.cinci.rr.com/mistab0ne/tranny.html
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Old 07-31-2004, 12:20 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (JV)

4.9

Seriously, what do you care what your top speed is, you will very likely never hit it on a road course or drag strip.

4.9 Will actually get it in B series gear ratios (not literally).
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Old 07-31-2004, 12:41 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (Aquafina)

if you know anybody with 20in slicks you can mount those up and launch your car. that will get u like a 4.8xx final drive.

if u get a 4.7 your gears would be slightly i mean slightly longer, if u get the 4.9 the gears would be slightly shorter.


there is a very good tranny page by mista bone. ill try to find it and post it up
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Old 07-31-2004, 12:53 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (kyosoeg6)

Stock EX/Si FD is 4.25, both 4.7 and 4.9 will make the gears shorter.

You can't run 20" slicks on a roadcourse.
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Old 07-31-2004, 01:08 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (Aquafina)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">Stock EX/Si FD is 4.25, both 4.7 and 4.9 will make the gears shorter.

You can't run 20" slicks on a roadcourse.</TD></TR></TABLE>

who was asking about a road course

all i said was to bolt them up drive a block or 1/4mile with them to see how he likes it cus that will affect his final drive
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Old 07-31-2004, 02:09 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (kyosoeg6)

Oh, I thought you meant just use those instead.
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Old 08-02-2004, 12:01 AM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (Aquafina)

at what rpm do the 4.7 and the 4.9 ratios put you at when your doing 80mph in 5th gear?
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Old 08-02-2004, 03:22 PM
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Default Re: srr 4.7 or 4.9 final drive for d series s20 tranny? (Vp Special K)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vp Special K &raquo;</TD></TR><TR><TD CLASS="quote">at what rpm do the 4.7 and the 4.9 ratios put you at when your doing 80mph in 5th gear?</TD></TR></TABLE>

For the extremely lazy...

Si HB or Del sol Si tranny w/ 4.9fd = RPM in top gear at 70mph: 3931

Si HB or Del sol Si tranny w/ 4.7fd = RPM in top gear at 70mph: 3770

EX 2dr or sedan tranny w/ 4.9fd = RPM in top gear at 70mph: 3679

EX 2dr or sedan tranny w/ 4.7fd = RPM in top gear at 70mph: 3529

Calculated using a 22" tire.

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Old 08-02-2004, 03:26 PM
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Default Re: (bdb)

ok, so I got the JDM Vti tranny in my LX, what's the FD on it? I put it in for auto-x and love it, it's a whole new beast... (love the LSD too)

cut off at over 160kph in 4th, guess that's about 100 mph, no need to go faster than that, have no idea what my top speed is though
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