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Well my 85 Si is almost ready to roll again (that is, after the cv shafts, struts, rear tranny mount, and shift linkage are back together) with the Dx tranny Rpr gave me at N10 (thanks again!!). I was just curious with the difference in gear ratios, will the car be noticably slower? and is it a 4 or 5 speed?
thanks and enjoy,
Jacques
0
Dx Vs. Si Tranny
Started by JDN14, Sep 08 2004 09:01 AM
7 replies to this topic
#1
Posted 08 September 2004 - 09:01 AM
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#2
Posted 08 September 2004 - 09:29 AM
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- I bleed motor oil.
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Drives: The Si (86 Civic Si D16A1 blacktop) The Blackbird (87 CRX Si Bone Stock) Cherry II (86 Civic 1500S Mostly Stock)
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Apparently the 85 CRX Si came with a shorter gear ratio than all others.... I think its in the service manual and you can check your vin to find out.
In other words, the DX tranny might be a bit slower, but you aren't going to notice a HUGE difference.
Here is one way to find out: at 100km/h, I am turning 3000rpm, thats an 87 Si Tranny, also the same as my 86 DX tranny, both CDM. What RPM are you at when doing 60mph?
Also, top speeds: (at 6500rpm)
1st gear: 50km/h
2nd gear: 80km/h
3rd gear: 120km/h
4th gear: 200km/h
5th gear: HA!
Cheers,
Mark
In other words, the DX tranny might be a bit slower, but you aren't going to notice a HUGE difference.
Here is one way to find out: at 100km/h, I am turning 3000rpm, thats an 87 Si Tranny, also the same as my 86 DX tranny, both CDM. What RPM are you at when doing 60mph?
Also, top speeds: (at 6500rpm)
1st gear: 50km/h
2nd gear: 80km/h
3rd gear: 120km/h
4th gear: 200km/h
5th gear: HA!
Cheers,
Mark
SportInjectedClub
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#3
Posted 08 September 2004 - 10:08 AM
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- Granny
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Drives: 85 CRX DX
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That's odd... in my '85 Cr-x Dx I'm pulling the following
(Redline shift @ 6500rpm's)
1st gear: 35 mph
2nd gear: 60 mph
3rd gear: 90 mph
4th gear: wont break 115mph (@ 4k)
5th gear: (the skys the limit...)
As well (in 5th) I sit at about 70mph @ 3k
PS. I'm almost positive that only the automatics were 4 speed.
(Redline shift @ 6500rpm's)
1st gear: 35 mph
2nd gear: 60 mph
3rd gear: 90 mph
4th gear: wont break 115mph (@ 4k)
5th gear: (the skys the limit...)
As well (in 5th) I sit at about 70mph @ 3k
PS. I'm almost positive that only the automatics were 4 speed.
#4
Posted 08 September 2004 - 10:13 AM
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- Speedy
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Drives: 1987 CRX DX. Upgrades (so far) Illuminas on all four corners, new rims & tires & Eldo's carb mod. Needs some rust repair. 1993 Civic Si as a daily driver that I have sworn to keep stock (so $$ can go to the CRX).
Sound exactly the same as the tranny on my '87 carbed CDM CRX.
That 50kph redline in first is usefull getting up to speed fast on a road w/a 50kph limit without worrying about speeding... :-)
That 50kph redline in first is usefull getting up to speed fast on a road w/a 50kph limit without worrying about speeding... :-)
#5
Posted 08 September 2004 - 04:26 PM
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- Turbodan
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Drives: 90 CRX Si
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QUOTE
That's odd... in my '85 Cr-x Dx I'm pulling the following
(Redline shift @ 6500rpm's)
1st gear: 35 mph
2nd gear: 60 mph
3rd gear: 90 mph
4th gear: wont break 115mph (@ 4k)
5th gear: (the skys the limit...)
As well (in 5th) I sit at about 70mph @ 3k
(Redline shift @ 6500rpm's)
1st gear: 35 mph
2nd gear: 60 mph
3rd gear: 90 mph
4th gear: wont break 115mph (@ 4k)
5th gear: (the skys the limit...)
As well (in 5th) I sit at about 70mph @ 3k
I can pull off 60mph in 2nd with a 89 teg tranny but thats a 7500rpm shift.
You must have pretty long gears.
90 crx si
13.17@113 street tires low boost
86 samurai g16 turbo
13.17@113 street tires low boost
86 samurai g16 turbo
#6
Posted 08 September 2004 - 05:21 PM
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Drives: 85 CRX Si (ZC), 2011 Toyota Camry
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I had a 85Si tranny put in my 87DX and it made a difference just off the line.
Once a woman is introduced to Colonel Angus, she'll settle for nothing less.
#7
Posted 08 September 2004 - 05:35 PM
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- From Ashy to Classy
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Drives: 87 CRX DX
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QUOTE (Rampage @ Sep 8 2004, 09:29 AM)
Here is one way to find out: at 100km/h, I am turning 3000rpm, thats an 87 Si Tranny, also the same as my 86 DX tranny, both CDM. What RPM are you at when doing 60mph?
i think that's because the CDM Dx = (more or less) a carb'd Si. same (or EXTEMELY close) tranny i would believe.
Ay!
Ay, dog, ay!
You stepped on my sneaker meng!
Ay, dog, ay!
You stepped on my sneaker meng!
#8
Posted 08 September 2004 - 05:56 PM
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- I bleed motor oil.
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- Group: Moderators
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Drives: The Si (86 Civic Si D16A1 blacktop) The Blackbird (87 CRX Si Bone Stock) Cherry II (86 Civic 1500S Mostly Stock)
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Thats what I was suggesting 
I think all the trannies are the same up in Canada for gearing, and apperently there were some wierd ratios in the states, like 49-state, HF, and Super-low Si or something like that.
Very confusing
Cheers,
Mark
I think all the trannies are the same up in Canada for gearing, and apperently there were some wierd ratios in the states, like 49-state, HF, and Super-low Si or something like that.
Very confusing
Cheers,
Mark
SportInjectedClub
I don't frequent the boards much anymore, but i'm a wealth of knowledge. Email or PM me if you're stumped!
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