speedracer002

If you have a ex motor(si-canadian) and a jrsc with a few bolt ons, now, the tranny is a dx . Now, is it better to keep it or swap for an ex-si

scenerio 1- supercharger generally gives off more boost slowly as u reach redline, now, if i keep dx- i was told the shifts are going to be sluggish, but, i have more km per gear, so i can make it up without having to constantly shift...
this is good for a supercharger

scenerio 2- buy si or ex...now, u need to shift more frequently, and it wil lbe harder shifts, but the supercharger wont work as effe tive

siregcivic

get the ex/si tranny.... it may be more shifts... but youll get going faster with that tranny than the dx one

Agent_STFU

The EX transmission is the way to go. You'll stay in a more useable power band.

speedracer002

is there a great difference. and how much quicker in a quater mile would it be.....1 second or .5

B18C5-EH2

There is no amount of boost that blower will give to to need such long-*** gears from a DX transmission.

Not only are the gears themselves taller and more spaced apart in the DX, which means the rpm drop more when shifting into each next gear, but the final drive is taller meaning it's painfully slow revving through each gear.

The Si/EX transmission is the way to go - hell I'd even be looking for an SRR 4.929 final drive too. You cannot go too short with the gearing on a D-Series tranny - even supercharged.

Ricey McRicerton

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">The Si/EX transmission is the way to go - hell I'd even be looking for an SRR 4.929 final drive too. You cannot go too short with the gearing on a D-Series tranny - even supercharged.</TD></TR></TABLE>

I'd agree with this to a point, but you're used to crusing arond on the highway at 4000 rpm. Just remember, a shorter final drive will bring your cruising RPM up in 5th gear.

Go with the EX/SI tranny at least. It'll help more than you can imagine.

speedracer002

when i drive on the hhighway, at 100 km, the car sounds funny in 5th. it sounds liek the rpm is way to low, so i keep it in 4th. and when i boot it, i talke it to 200 and it is still in 4th. 3 rd gear can take me to 160 km. What do most si trannys(ex) do 3rd gear in

JDM-EJ1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Diseased Dreams &raquo;</TD></TR><TR><TD CLASS="quote">The EX transmission is the way to go. You'll stay in a more useable power band.</TD></TR></TABLE>

What he said.

Ricey McRicerton

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedracer002 &raquo;</TD></TR><TR><TD CLASS="quote">when i drive on the hhighway, at 100 km, the car sounds funny in 5th. it sounds liek the rpm is way to low, so i keep it in 4th. </TD></TR></TABLE>

That is quite possibly the most retarted thing I've ever heard. My car rarely sees 4000 rpm, and it's definately not going to cruise anywhere near that. Low is good.

DaveSi677

with my Si tranny

1st=60
2nd=100
3rd=150
4th=200+ it could basically go more if it wasnt governed.
5th= same as 4th

but even if the dx tranny as longer gears and u go higher, it still will take u longer thenw with and Si tranny. So is it better to get there faster or slower?
Faster I say

Dave

DaveSi677

Btw speedracer002 you will have more fun with the Si tranny then with the dx tranny because you dont make much power already with a Supercharger on these engines so you want to maximize the amount of power you have. So the dx tranny would only slow you down but the Si will be more fun and quicker.

Dave

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">

I'd agree with this to a point, but you're used to crusing arond on the highway at 4000 rpm. Just remember, a shorter final drive will bring your cruising RPM up in 5th gear.

Go with the EX/SI tranny at least. It'll help more than you can imagine. </TD></TR></TABLE>

Okay I'll play along.

If you've got the transmission apart doing the final drive then swapping in the Dx 5th gear or even better, a Cx or Vx 5th gear would lower the rpm substantially.



I had an ATS 4.929Fd in my old Type R transmission and I swapped out my .848 ITR 5th gear for a .787 GS-R 5th gear - the difference between my old 4.400FDx.848 and the 4.929FDx.787 was negligible in terms of cruising rpm on the highway.

Dwight Schrute

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93SiVtec677 &raquo;</TD></TR><TR><TD CLASS="quote">with my Si tranny

1st=60
2nd=100
3rd=150
4th=200+ it could basically go more if it wasnt governed.
5th= same as 4th

but even if the dx tranny as longer gears and u go higher, it still will take u longer thenw with and Si tranny. So is it better to get there faster or slower?
Faster I say

Dave</TD></TR></TABLE>

are you saying ur 1st gear doesn't top out till 60 with the si tranny? my 1st gear tops out at 34 or 35 with my dx tranny and d15b7, that's the actual fuel cut off... 2nd gear goes to a little over 60.

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drewthomas14 &raquo;</TD></TR><TR><TD CLASS="quote">

are you saying ur 1st gear doesn't top out till 60 with the si tranny? my 1st gear tops out at 34 or 35 with my dx tranny and d15b7, that's the actual fuel cut off... 2nd gear goes to a little over 60.
</TD></TR></TABLE>

He means kph, not mph.

I often forget we have a lot of Canadian users here too...

litterbox

Damn Canadians!

Kista20

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

He means kph, not mph.

I often forget we have a lot of Canadian users here too...</TD></TR></TABLE>

yeah a lot more than we realize. If I ever swap out my tranny I'm gonna keep the y5 5th and put it in a y8 tranny so I get to keep my mileage. And since we're talking about gear ratio's is the fd ratio the same for the d series whether it's a y5,y7 or y8 and also is it different from the 92-95 and 96-00? I think they are the same and it's just the gears that are different.

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kista20 &raquo;</TD></TR><TR><TD CLASS="quote">
And since we're talking about gear ratio's is the fd ratio the same for the d series whether it's a y5,y7 or y8 and also is it different from the 92-95 and 96-00? I think they are the same and it's just the gears that are different.</TD></TR></TABLE>

I can only speak for the 1992-1995 Civics here, but I'd *assume* the 96-00 are much the same.

The 92-92 CX/VX has tallest gearing and a 3.25 final drive. 3.25!!!

The 92-95 DX/LX trans has closer gearing than the CX/Vx and a 4.02 final drive.

The Si/EX trans has the shortest gearing and a 4.25 final drive.

So the gearing and final drives are different in all 3 types of trannies.

As far as 96-00 goes I can say that the 5-speed CX, Dx, and LX trannies are identical. Unlike the 92-95, CX and Dx are the same.

Kista20

thanks Tom, it sounds like I got some researching to do on mine. Mine is geared pretty tall so I'm guessing that used different fd's as well between the 96-00 at least like you said the cx/dx/lx are the same but then you have the hx and ex so they are probabally different as well.

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kista20 &raquo;</TD></TR><TR><TD CLASS="quote">thanks Tom, it sounds like I got some researching to do on mine. Mine is geared pretty tall so I'm guessing that used different fd's as well between the 96-00 at least like you said the cx/dx/lx are the same but then you have the hx and ex so they are probabally different as well. </TD></TR></TABLE>

I'm an idiot.

Yes I forgot to add that the HX more than likely has the tallest gearset and tallest final drive as well, seeing as how it's the fuel efficient version.

If you don't have an Ex trans then I'd get one - it most certainly is shorter/quicker than the CX/LX/DX trans.

Kista20

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

I'm an idiot.

Yes I forgot to add that the HX more than likely has the tallest gearset and tallest final drive as well, seeing as how it's the fuel efficient version.

If you don't have an Ex trans then I'd get one - it most certainly is shorter/quicker than the CX/LX/DX trans.</TD></TR></TABLE>

No Tom your are most certainly not an idiot, lol. Yeah I know that the ex has the best gearing and I found a site that has all the ratios and the fd ratio for hx/cx/dx coupes and the cx/dx hatches have a fd of 3.722, the lx has 3.888 and ex coupe has 4.250. Also it says that my tranny has exactly the same ratos as the cx/dx coupe and hatches, so I dunno about that. It looks like honda took the same gears and fd's then mixed matched them to create the different trannies.

here's the link I found with the gear ratios and fd's, and they list pretty much everything from the crx up to the 6th gen civic.

http://crxresource.org/modules...d=106