i need opinions on what you guys think i should run on a JDM SOHC ZC as far as the tranny goes

USDM Si tranny

JDM DOHC ZC tranny

please add why you think i should run the tranmission you choose, right now i am leaning towards the USDM Si tranny

 

i would say use the si tranny because it drops right in(no mods or parts needed) if you go with the zc tranny you need to do an axel swap or get an extended shaft for it to fit. and also si tranny are pretty cheap

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hatchinprogress &raquo;</TD></TR><TR><TD CLASS="quote">i would say use the si tranny because it drops right in(no mods or parts needed) if you go with the zc tranny you need to do an axel swap or get an extended shaft for it to fit. and also si tranny are pretty cheap</TD></TR></TABLE>


yeah i have been reading that (the axle part).....i cant find an Si tranny right now

 

Performance - ZC
Intermediate shaft allows for less torque steer.

Cost - Si

 

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


yeah i have been reading that (the axle part).....i cant find an Si tranny right now </TD></TR></TABLE>


I have a spare SI tranny

 

I justswaped out my ZC tranny on my SOHC, for an USDm SI tranny and the gearing sucks! The ZC tranny is very short, on the freeway I would be going 80 MPH @3300 RPM, now, with a 91 SI tranny i am @ 2100 RPM at the same speed. the tranny does not seem to be geared right for the ZC power curve. I am rebuilding the ZC tranny with new bearings and can't wait to throw it back on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d357r0y &raquo;</TD></TR><TR><TD CLASS="quote">


I have a spare SI tranny </TD></TR></TABLE>


no grinds?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Devious-efhatch &raquo;</TD></TR><TR><TD CLASS="quote">I justswaped out my ZC tranny on my SOHC, for an USDm SI tranny and the gearing sucks! The ZC tranny is very short, on the freeway I would be going 80 MPH @3300 RPM, now, with a 91 SI tranny i am @ 2100 RPM at the same speed. the tranny does not seem to be geared right for the ZC power curve. I am rebuilding the ZC tranny with new bearings and can't wait to throw it back on. </TD></TR></TABLE>


so you are saying you DONT like the Si tranny?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Devious-efhatch &raquo;</TD></TR><TR><TD CLASS="quote">
I justswaped out my ZC tranny on my SOHC, for an USDm SI tranny and the gearing sucks!
</TD></TR></TABLE>

 

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


no grinds?</TD></TR></TABLE>

no grinds

 

you should go with the zc tranny and i have found out first hand that u can use si axels on a zc tranny and they work fine has anyone else done this i couldnt find any teg axles anywhere so i tired my si and they work awsome and also the zc works well with the the power curve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cbrodac0424 &raquo;</TD></TR><TR><TD CLASS="quote">you should go with the zc tranny and i have found out first hand that u can use si axels on a zc tranny and they work fine has anyone else done this i couldnt find any teg axles anywhere so i tired my si and they work awsome and also the zc works well with the the power curve</TD></TR></TABLE>

Dude, you are smoking crack.
The si shaft has a completely different input size compared to the zc. Are you sure you got a ZC tranny and not another SI?

 

ZC all the way, it makes the Si trans feel like an HF tranny Oh and you DONT need a ZC intermediat shaft. all you need is Bseries/ZC inner joints on stock dx/si axles and your good too go bang on foo's with Si tranny's

 

go with a si it easy swap to do with a dual overhead cams zc's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Devious-efhatch &raquo;</TD></TR><TR><TD CLASS="quote">I justswaped out my ZC tranny on my SOHC, for an USDm SI tranny and the gearing sucks! The ZC tranny is very short, on the freeway I would be going 80 MPH @3300 RPM, now, with a 91 SI tranny i am @ 2100 RPM at the same speed. the tranny does not seem to be geared right for the ZC power curve. I am rebuilding the ZC tranny with new bearings and can't wait to throw it back on. </TD></TR></TABLE>

2100 RPM ~80 MPH for an Si TRANS???
Fk what the guy told you it was, that's an HF er some other cracked out tranny

 

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

2100 RPM ~80 MPH for an Si TRANS???
Fk what the guy told you it was, that's an HF er some other cracked out tranny
</TD></TR></TABLE>

Word. No way is an SI tranny at 2100 rpms.. My buddy's HF is almost exactly at that range. Even my old DX motor was up around 3.5-4k at 80-85mph.

 

fugazi

 

i say you go with the zc tranny. i'm using it on my single cam and it feels way better than the si tranny.

 

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

2100 RPM ~80 MPH for an Si TRANS???
Fk what the guy told you it was, that's an HF er some other cracked out tranny
</TD></TR></TABLE>

i second that...you must not have an si tranny. cause i turn around 4k at 80mph...with the si tranny.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastcrxsi90 &raquo;</TD></TR><TR><TD CLASS="quote">i second that...you must not have an si tranny. cause i turn around 4k at 80mph...with the si tranny.</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr_CRX &raquo;</TD></TR><TR><TD CLASS="quote">Word. No way is an SI tranny at 2100 rpms.. My buddy's HF is almost exactly at that range. Even my old DX motor was up around 3.5-4k at 80-85mph. </TD></TR></TABLE>

My 4-speed tranny does 80 @ 4K. Shouldn't a 5-speed bring the RPMs down lower than the 4 speed since you have that OD gear?

 

Depends on the tranny gear ratios.

 

this is totally off topic fastcrxsi90, but the picture on your main page kicks ***.

nice car also, i like what you've done