zc trans help wanted
Thread Starter
Joined: Dec 2005
Posts: 4
Likes: 0
From: Soddy Daisy, Tn, united states
zc trans help wanted
i have a dohc zc with the stock trans and i have an si trans sitting in the corner of my shop from when i did the motor swap. would the si trans be better for an autocross/road race type of car? and would it use a different clut kit and flywheel? i have a competition clutch lightweight flywheel and stage 1 clutch that i would still like to use that has less than 4k miles on it.
B*a*n*n*e*d
Joined: Mar 2003
Posts: 9,783
Likes: 47
From: Greenville, South Carolina
combine the two, put the si final drive + 5th gear in the zc gears and drop the si differential (with ring gear) into the trans.
close ratio 1-4 gears with a shorter final drive.
then put the 3.8888 zc final in the si trans and sell it as a dx trans. if you need a open diff taht doesn't require the zc axles, let me know.
ideal = this
1st = 3.25
2nd = 1.944
3rd = 1.346
4th = 1.033
5th = 0.878 (zc) or the 0.771 (si)
final = 4.25
any questions, ask in this thread and i'll be watching over it.
close ratio 1-4 gears with a shorter final drive.
then put the 3.8888 zc final in the si trans and sell it as a dx trans. if you need a open diff taht doesn't require the zc axles, let me know.
ideal = this
1st = 3.25
2nd = 1.944
3rd = 1.346
4th = 1.033
5th = 0.878 (zc) or the 0.771 (si)
final = 4.25
any questions, ask in this thread and i'll be watching over it.
Member
Joined: Feb 2002
Posts: 1,370
Likes: 0
From: I sell JDM engines too, CA, US
Re: zc trans help wanted (U5EL355)
While the SI/ZC trans is awesome for overall acceleration, the gearing is rather SHORT for autocross.
You're gonna want a combo that tops 60 MPH in 2nd.
SHORT gearing would force you to shift wayyy to early
BUT it depends on the course.
You're gonna want a combo that tops 60 MPH in 2nd.
SHORT gearing would force you to shift wayyy to early
BUT it depends on the course.
B*a*n*n*e*d
Joined: Mar 2003
Posts: 9,783
Likes: 47
From: Greenville, South Carolina
Re: zc trans help wanted (HumanResource)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HumanResource »</TD></TR><TR><TD CLASS="quote">While the SI/ZC trans is awesome for overall acceleration, the gearing is rather SHORT for autocross.
You're gonna want a combo that tops 60 MPH in 2nd.
SHORT gearing would force you to shift wayyy to early
BUT it depends on the course.</TD></TR></TABLE>
that is very true, but if he's running a higher redline zc engine, with 205/50/15s, 2nd gear @ 60mph is only 7200 rpms.
if for some reason you wanted shorter 1/3/4/5 with a taller 2nd you could run a hf/std mainshaft with a 1.65 2nd gear. With 20" tires, 2nd gear at 60mph would be 7100.
I have a 1.65 mainshaft and 2nd gear that I could send you for costs of shipping. This would actually feel real good with the tall hf/std 2nd to the short zc 3rd
play with: http://www.f-body.org/gears/
you already have a 1.944 and a 1.894 2nd gear, the only other oem option is 1.65.
here's a list of D ratios should you need it
http://www.knology.net/~jedikl...s.htm
You're gonna want a combo that tops 60 MPH in 2nd.
SHORT gearing would force you to shift wayyy to early
BUT it depends on the course.</TD></TR></TABLE>
that is very true, but if he's running a higher redline zc engine, with 205/50/15s, 2nd gear @ 60mph is only 7200 rpms.
if for some reason you wanted shorter 1/3/4/5 with a taller 2nd you could run a hf/std mainshaft with a 1.65 2nd gear. With 20" tires, 2nd gear at 60mph would be 7100.
I have a 1.65 mainshaft and 2nd gear that I could send you for costs of shipping. This would actually feel real good with the tall hf/std 2nd to the short zc 3rd
play with: http://www.f-body.org/gears/
you already have a 1.944 and a 1.894 2nd gear, the only other oem option is 1.65.
here's a list of D ratios should you need it
http://www.knology.net/~jedikl...s.htm
Thread
Thread Starter
Forum
Replies
Last Post
Modern91Hatch
Tech / Misc
4
Apr 25, 2008 08:38 AM