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Old 08-11-2017, 01:09 PM   #3076
mav1c
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Originally Posted by boost junkie View Post
It's brand new, I never installed it. Was planning to but then I decided to do the Samsonas instead. It just replaces your stock 5th and 6th drive gears, and the 5/6 driven gear cluster. Everything else remains the same.

Ha. Duh. For some reason I was thinking you meant a whole transmission. What's the difference in gearing is between the USDM and JDM 5/6?

At the very least I need the 4th gear synchro replaced. Lots of grinding going into 4th, and will sometimes pop out of gear.
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Old 08-11-2017, 02:04 PM   #3077
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Ugh it's been sitting in customs since July 26. Some jackass flagged it as "agricultural goods" so they can hold it for up to 30 days for inspection before they clear it. So ridiculously frustrating since it means I'm now going to have to bow out of Gridlife. Can I blame Trump for this one?
Ughhhhh I mean it is Atlanta in August, so you can't really be missing much
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Old 08-11-2017, 02:07 PM   #3078
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Originally Posted by mav1c View Post
Ha. Duh. For some reason I was thinking you meant a whole transmission. What's the difference in gearing is between the USDM and JDM 5/6?

At the very least I need the 4th gear synchro replaced. Lots of grinding going into 4th, and will sometimes pop out of gear.
USDM ratios are 3.636, 2.375, 1.761, 1.346, 0.971, 0.756. JDM ratios with this set are 3.636, 2.375, 1.761, 1.346, 1.062, 0.842. So you lose a little bit of top speed but you get much more even gear spacing. Obviously you're still not going to be touching the rev limiter in 6th unless you make insane power or are driving at Le Mans Theoretical top speed in 4, 5, 6 at 7k rpm is 102, 129, 162, as opposed to 102, 141, 181 for USDM.

I was having the same issue with grinding going into 4th, which then became popping out of 4th and got progressively worse. I was trying to steer with one hand and hold the shifter in 4th with the other and obviously that didn't work too well.
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Old 08-11-2017, 02:11 PM   #3079
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Ughhhhh I mean it is Atlanta in August, so you can't really be missing much
It's not so bad, I'm used to hot and humid here in DC. But yeah, probably not track record kinda weather. It sounds like a fun event though, I'm bummed to be missing it.
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Old 08-11-2017, 02:51 PM   #3080
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Originally Posted by boost junkie View Post
USDM ratios are 3.636, 2.375, 1.761, 1.346, 0.971, 0.756. JDM ratios with this set are 3.636, 2.375, 1.761, 1.346, 1.062, 0.842. So you lose a little bit of top speed but you get much more even gear spacing. Obviously you're still not going to be touching the rev limiter in 6th unless you make insane power or are driving at Le Mans Theoretical top speed in 4, 5, 6 at 7k rpm is 102, 129, 162, as opposed to 102, 141, 181 for USDM.

I was having the same issue with grinding going into 4th, which then became popping out of 4th and got progressively worse. I was trying to steer with one hand and hold the shifter in 4th with the other and obviously that didn't work too well.
Thanks for the info. That lower 5th would be so nice.

Yeah. I remember you mentioning the 4th gear issue. That what led you to the fancy, new sequential right? Did you confirm the synchros were shot, or was the 4th gear actually broken/damaged? PM me how much you'd want for those gears. :-)
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Old 08-11-2017, 03:03 PM   #3081
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Originally Posted by mav1c View Post
Thanks for the info. That lower 5th would be so nice.

Yeah. I remember you mentioning the 4th gear issue. That what led you to the fancy, new sequential right? Did you confirm the synchros were shot, or was the 4th gear actually broken/damaged? PM me how much you'd want for those gears. :-)
I had actually already ordered the sequential when my stock box decided to take a crap. It hasn't come apart yet so I'm not 100% sure it's a synchro issue but that makes the most sense given the grinding and the gradual buildup to 4th being pretty much unusable.

PM incoming.
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Old 08-11-2017, 03:12 PM   #3082
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I had to cancel on GridLife as well, but I'm going to try and shake the car down at VIR next weekend w/NASA, though.
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Old 08-11-2017, 03:17 PM   #3083
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Yeah my general plan is to do seat time at summit at the end of september, then october VIR with NASA. Maybe the November summit event too if the weather is good again, that was a fun outing last year. I had a dream the other night I did a 1:07 at summit so now I have something to shoot for
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Old 08-11-2017, 06:28 PM   #3084
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Well that better be one hell of a repave at Summit in Oct....
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Old 08-12-2017, 07:43 PM   #3085
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Not that this is really relevant to you with the sequential, but several of the factory 6mt's from the spec C (and I think other models) had an external line that fluid was pumped through for precisely this reason - disconnect the factory plumbing and connect an oil cooler, threads etc already tapped, pump already installed, ready & waiting
iirc it is -10orb but I may be remembering this wrong

I have a 16 or 18 row mocal setrab set aside for mine , bought the fittings for the trans a while back , most likely it will end up behind the drivers side axle with some sort of ducting / box


gd - internal pump / crossover line

gr - nope


trying to figure what to do for the rear diff ...................


recent fmic forced me to remove the engine oil cooler but temps have not gone over 230+/- with just a loop on line running in/out of the sammich adapter


I would think on boost junkies whip the/any cooler may be nice in the rear diffuser , maybe help fill the void behind the car with hot air ?


any news on that old up pipe ?
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Old 08-14-2017, 11:14 AM   #3086
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Originally Posted by motorbykemike View Post
iirc it is -10orb but I may be remembering this wrong

I have a 16 or 18 row mocal setrab set aside for mine , bought the fittings for the trans a while back , most likely it will end up behind the drivers side axle with some sort of ducting / box


gd - internal pump / crossover line

gr - nope


trying to figure what to do for the rear diff ...................


recent fmic forced me to remove the engine oil cooler but temps have not gone over 230+/- with just a loop on line running in/out of the sammich adapter


I would think on boost junkies whip the/any cooler may be nice in the rear diffuser , maybe help fill the void behind the car with hot air ?


any news on that old up pipe ?
I have been thinking about doing exactly that...trans and diff coolers exiting above the rear diffuser, with intake ducts in the rear windows. Going to be using an MSI diff cover with a Tilton fluid pump for the diff.
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Old 08-14-2017, 11:06 PM   #3087
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Window ducting probably isn't necessary - i'd just put a couple of fans on them and ensure there's an exit for the air.
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Old 08-15-2017, 11:42 AM   #3088
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Originally Posted by vicious_fishes View Post
Window ducting probably isn't necessary - i'd just put a couple of fans on them and ensure there's an exit for the air.
Much simpler to just use a naca duct and some hose, rather than building a subharness and using another PDM output for fans. Just another thing to potentially go wrong.
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Old 09-08-2017, 09:10 PM   #3089
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Much simpler to just use a naca duct and some hose, rather than building a subharness and using another PDM output for fans. Just another thing to potentially go wrong.
Any updates on the sequential trans?
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Old 09-13-2017, 12:09 PM   #3090
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Any updates on the sequential trans?
It finally cleared customs and was delivered last week. That's all I know at this point, no idea when the install is going to happen. Hopefully soon though since the season is almost over.
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Old 09-14-2017, 05:33 PM   #3091
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I have been thinking about doing exactly that...trans and diff coolers exiting above the rear diffuser, with intake ducts in the rear windows. Going to be using an MSI diff cover with a Tilton fluid pump for the diff.
Quote:
Originally Posted by boost junkie View Post
Much simpler to just use a naca duct and some hose, rather than building a subharness and using another PDM output for fans. Just another thing to potentially go wrong.
You won't need fans. The amount of oil you add to account for the supply/return lines, pumps, and heat exchangers is going to absorb more energy and heat up more slowly. A little air flow over a decent cooler should be plenty.
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Old 09-15-2017, 12:51 PM   #3092
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Right...no plan to run fans. Just a bit of ducted air. A decent amount of cooling is required though, things get HOT under there with the flat bottom.
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Old 09-15-2017, 02:27 PM   #3093
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It finally cleared customs and was delivered last week. That's all I know at this point, no idea when the install is going to happen. Hopefully soon though since the season is almost over.
Damn........
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Old 09-28-2017, 04:02 PM   #3094
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Small parts update (although nothing to report on the car at the moment). Ordered and received a pair of OS Giken Super Lock diffs, which I'm very excited to try out. The current diff setup worked great previously but with the amount of power and grip the car now makes, I decided to work with them to come up with a custom tuned solution that would work better all around. This offseason, I'll have a Quaife front and Carbonetic rear diff for sale for a very attractive price

I also received a billet aluminum rear diff cover from MooreSport, as well as a steering rack adapter (brand new part). The diff cover alone will reduce temps, as it increases fluid capacity and has a finned surface for better heat dissipation. But the real draw for me was the extra ports for adding an external cooler, as well as a universal temp sensor. Now I can run a cooler with the fluid pump triggered off the temp sensor (thanks MoTeC).

The rack adapter allows the lines to be converted to 100% AN hoses and fittings. Right now, we are running a hybrid with the hard lines cut and flared to accept an AN fitting but this will eliminate that altogether.



I'm still hoping to get the new gearbox in and make it out to summit in November. Fingers crossed!
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Old 09-29-2017, 08:24 AM   #3095
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That's a beautiful piece. Tempting, when everything else is getting cooling. I was surprised to read about temperatures in our rear diff and how it could get out of control (oil breaking down/bearings failing prematurely). I was planning on just directing air on it from a hose off a naca duct. OTOH, I am seldom on the track for more than 25 minutes at a stretch. I seem to be OK sofar but I don't run in the heat of the summer.
I hope you have good luck with OS Giken. Mine were custom setups too. They messed up my order and were rather difficult to communicate with, though they did get things straightened out. That was over a year ago. The diffs seem to work well though I was never able to say "oh wow", but perhaps when they do their job well they are not that obvious. I think the rear may have an audible clunk when I let off hard. I thought possibly the swaybar heim joints but a cohort suggested it's the diff.
I've not touched the center diff but have the DCCDPro Universal Controller with left foot brake option installed. Thinking I should opt for the upgraded frictions and group N DCCD rebuild kit that ZF Design offers. I once sensed a little slippage (RPM's going up briefly) from somewhere when hard power exiting from one particular turn. Figure it has to be the clutch or the center diff. Don't think it's the clutch and doubt I was breaking loose all four. Any thoughts? Did not notice anything at my last track day.
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Old 09-29-2017, 10:32 AM   #3096
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You should be fine if you have an open bottom and are only doing short sessions, the flat bottom is what really retains a lot of heat and makes the coolers necessary.

So far my dealings with OS have been very smooth and they've been super helpful so hopefully your experience is outside the norm. I've also heard great things about the quality and reliability of the product. Based on what you're describing, I highly doubt your issue is the center diff...sounds more like clutch slip. My understanding is that the group n DCCD rebuild kit is more suited to gravel surfaces.
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Old 09-29-2017, 10:47 AM   #3097
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Summit on the fresh repave in ~6 weeks?
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Old 09-29-2017, 10:59 AM   #3098
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Summit on the fresh repave in ~6 weeks?
Desperately trying to make it there, especially with the repave. If we get weather like last year it could be really ideal conditions. TTU track record is a 1:13.7 so it's something to shoot for...
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Old 09-29-2017, 11:11 AM   #3099
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Desperately trying to make it there, especially with the repave. If we get weather like last year it could be really ideal conditions. TTU track record is a 1:13.7 so it's something to shoot for...
Yup. All things go well with the repave, weather, and getting rid of a few crap placed bumps during the repave should mean all the track records go bye bye. I'd expect TT2 to drop into the 15's.
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Old 09-29-2017, 11:21 AM   #3100
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Yup. All things go well with the repave, weather, and getting rid of a few crap placed bumps during the repave should mean all the track records go bye bye. I'd expect TT2 to drop into the 15's.
It's a summit repave though so you never know what you're gonna get. It could be perfect all weekend or T1 could start coming up in chunks on saturday morning.
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