Miata Turbo Forum - Boost cars, acquire cats.

Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   Suspension, Brakes, Drivetrain (https://www.miataturbo.net/suspension-brakes-drivetrain-49/)
-   -   4 Spd Jerico w/ '99 Motor (https://www.miataturbo.net/suspension-brakes-drivetrain-49/4-spd-jerico-w-99-motor-74899/)

Raucky 10-12-2013 06:38 PM

It just keeps all the angles in check

Raucky 11-04-2013 11:40 AM

6 Attachment(s)
Well, I know it's been a while, but I figured I would share some pictures with you guys. I'm still waiting on some parts for the install. I almost feel bad putting the tranny under the car where no one will see it, because it looks really nice on my shop floor. I'm just hoping after the install, it' won't have anymore time on my shop floor!

TurboTim 11-04-2013 11:50 AM

sick. Keep posting pictures. Please.

What ratios did you go with?

Leafy 11-04-2013 11:54 AM

Damn those things are pretty. It looks so tiny and you would think it would only weigh about 50 pounds. But those gears are heavy duty.

sixshooter 11-04-2013 12:21 PM

I bet it is strong and light. A buddy of mine is running a Jerico competitor with a fairly tall rear gear and a tall first gear. He coasts through the pits pretty quickly at idle and uses a winch to load the car on the trailer, but first gear is a very usable gear on the track for him (turn 7 at Road Atlanta) and he can still reach 160+ in top gear regularly on the back straight. It's a SBC engine though.

Raucky 11-04-2013 02:20 PM

Well my gear ratios are really strange and prob useless for you since it's an autocross only car.

I'll work on posting pics as the progress continues.

Leafy 11-04-2013 02:23 PM


Originally Posted by Raucky (Post 1070086)
Well my gear ratios are really strange and prob useless for you since it's an autocross only car.

I'll work on posting pics as the progress continues.

No it is pretty applicable. Andrew seems adamant that it wont work for the track snobs so this is pretty much an auto-x only tranny choice on this site. The 3.63 rear gear would make 4th almost like a 1.6's 5th, and you can work back from there on the ratios. And run the car in 2nd at auto-x.

TurboTim 11-04-2013 03:33 PM

Yeah, the track snobs can either change their diff to run around the 1:1 4th gear. or run ALLOFIT with a gearvendors overdrive. Cause if you're spending a few grand, why not spend a few grand more. 8 gears should make them happy. There's an incredible amount of ratios looking at Jerico's 4speed gear ratio chart.

Leafy 11-04-2013 03:38 PM


Originally Posted by TurboTim (Post 1070117)
Yeah, the track snobs can either change their diff to run around the 1:1 4th gear. or run ALLOFIT with a gearvendors overdrive. Cause if you're spending a few grand, why not spend a few grand more. 8 gears should make them happy. There's an incredible amount of ratios looking at Jerico's 4speed gear ratio chart.

Another option would be to run a 7.7:1 rear gear (speedway quick change) and make 4th (1:1) as the first gear and install the rest of the gears on the opposite shaft as intended. You could re-jigger that shift linkage to even make the gears in the right spots.

The overdrive is interesting. Is it also side shifted so possible to build an insane shifter that automatically shifts it as you move and moves back to 1st gear. (yay for complex as shit linkages).

Raucky 11-04-2013 05:03 PM

umm... yeah my gearing isn't convential lol. There is a HUGE rpm drop from 3rd to 4th in my box.

You can make this box work on the track of course, but a five speed would be better for the track.

Leafy 11-05-2013 09:48 AM


Originally Posted by TurboTim (Post 1070117)
Yeah, the track snobs can either change their diff to run around the 1:1 4th gear. or run ALLOFIT with a gearvendors overdrive. Cause if you're spending a few grand, why not spend a few grand more. 8 gears should make them happy. There's an incredible amount of ratios looking at Jerico's 4speed gear ratio chart.

Hey I actually looked at these overdrives. Its a planetary gear set so I'm assuming that shifting into it you're just applying a brake to the planetary gear or releasing the brake. Which would be why no lift and no clutch is required. And yeah it give you a gear between every gear. Not sure if the road course guys are going to have to remember to pull a lever/push a button to get another gear though. Also not sure how heavy they are.

shlammed 11-10-2013 12:20 PM

Any more info on this Raucky

Raucky 11-11-2013 06:53 PM

Nope not yet....I'm stilll waiting on some parts to be made, but I'm hoping to have everything in a wk or two.

shlammed 04-29-2014 02:38 PM

You get that thing in there yet or what

Raucky 10-16-2014 09:33 AM

6 Attachment(s)
Ok so after an extremely long pause on building my car. I've got the ball rolling again and here are some pictures guys.

Leafy 10-16-2014 09:36 AM

Damn this is the first time I've seen actual pictures of this bell housing. They aint fucking around with making it explosion proof. That plate that replaces the "gasket" is thick as fuck.

sixshooter 10-16-2014 10:18 AM

Sexxxyyy! If I end up with all of the horsepower one day and nobody has come up with a good five speed solution then I may be following you right down this path.

EO2K 10-16-2014 11:22 AM

Christ almighty, what does that thing weigh? Just the bellhousing itself

TurboTim 10-16-2014 11:59 AM

godddamnnn on that bellhousing, shit. Very nice.

Raucky 10-16-2014 12:12 PM

Yeah I don't think I'll have to worry about it breaking huh?

The weight of the stock 5spd compared to the "complete" Jerico/Bell Housing is basically the same.


All times are GMT -4. The time now is 02:14 AM.


© 2024 MH Sub I, LLC dba Internet Brands