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#41 JimmyHoffa

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Posted 28 October 2009 - 01:02 PM

I was going to run one 00 gauge wire to the back for the + (around 20 feet to route it nicely), and one 0 gauge ground. I want good grounding to the engine and ECU, without any ground loops. For proper power transmission you need bigger gauge wire the longer you're going. The 1-2 foot stock power wire is somewhere around 2 gauge, for ~20 feet you need something closer to 00 so you don't end up with a lot of resistance. That works out to a hell of a lot of copper, both in weight and in cost and I am a cheap mofo. It was pretty easy to make a battery tray, and I had like 50 feet of 1 gauge aircraft grade power cable, so I chose the easy and cheap solution.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
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Toysport and 935 Motorsports suck. Don't buy from either.


#42 JimmyHoffa

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Posted 17 March 2010 - 10:52 AM

I put my car back on the road yesterday since the snow is gone. Put in my new Bully stage 4 single plate and I love it. The ORC was cool, but not really DDable, this clutch is supposedly good for 600 horse/ft/lb and feels damn near stock. The car also idles a bit smoother and lower with the heavier stock PP. I also put in a second WG spring so instead of 9psi spring pressure and 12psi with a shoddy MBC I'm running ~14 psi. I still need to put in the BCC I got from aphxero, and my 440s but the AFRs are looking solid until boost cut. My next purchase will be coilovers... I forgot how scary it is to drive around with 300+hp and blown 25 year old suspension.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#43 JimmyHoffa

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Posted 20 April 2010 - 08:39 PM

Just blew up another 7.5" diff in my Cressida. I need another one. Preferably in Canada, preferably close, but willing to pay for shipping if someone has one.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#44 Bill

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Posted 22 April 2010 - 10:20 AM

shit man.

#45 brian

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Posted 22 April 2010 - 10:42 AM

throw this in

http://cgi.ebay.com/...3#ht_1271wt_856
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#46 Raceready68

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Posted 27 April 2010 - 05:54 AM

I got a LSD Diff out of a mk2 supra if you are interested toss me a offer.

#47 JimmyHoffa

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Posted 27 April 2010 - 01:06 PM

I just bought a truetrac and solid pinion spacer today. Helical isn't really what I wanted, but they're supposed to be good for 700+ horsepower, so I shouldn't have to fuck with it again.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#48 Piggity

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Posted 28 April 2010 - 07:27 PM

Do you plan on drifting with this diff Jimmy Hoffa? I've heard that they don't lock all the time, more of a 1way.

#49 JimmyHoffa

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Posted 28 April 2010 - 09:10 PM

I plan on sliding a few corners, maybe go to a couple drift days, definitely a couple drag days and lapping... when it's a bit more complete. More than anything it's my DD and gets the shit beaten out of it on the regular. AFAIK there aren't many other 7.5" diffs on the market that will reliably handle more than 350 horse and 300ft/lb. The TrueTracs are reportedly fine with upwards of 700 horse.. I've gone through two stock LSDs in under a year and I want something reliable that can take the abuse I dish out, I also don't want to DD a weldy.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#50 JimmyHoffa

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Posted 15 June 2010 - 08:45 PM

New diff and all bearings here, I'm setting it up and trying to get the gears patterned properly now. It looks like the next most likely thing to break is the ring gear or the actual pinion shaft.

This is what happens when your pinion crush sleeve collapses and your pinion gear pulls into the carrier.
Posted Image

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#51 JimmyHoffa

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Posted 05 July 2010 - 09:01 PM

I did a bit of work today on my hubs for my 300ZX brake setup. I'm cheap, lazy and stubborn so I'm not going 5 bolt right now. Sorry about the crappy iphone pics.

Machined hubs (diameter machined to fit inside the rotor hat, snout machined down for thermal fit ring)
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Ring ready to be heated
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one hub ready to go in the freezer and one with ring installed (.002 interference fit)
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finished product
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Should be installing them this weekend.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#52 Username

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Posted 06 July 2010 - 03:10 PM

Jimmy what is it exactly that you keep breaking? Is it the crush sleeve? How about using the TRD LSD? I know they hold up real good with the MKIV supra diffs granted they're 8in, I think. There is 1 guy on cs.com using it and it seems to be holding up just fine for him. If I knew that I could of used the TRD unit I might of opted for that instead of the TrueTrac. Also have you seen the Weir Performance stock LSD rebuild kit? Look though this thread if you havent yet http://forums.celica...p...6340&page=2 they chime in at post #15

Just some ideas...


QUOTE (CominInHot @ Sep 15 2010, 08:33 PM) <{POST_SNAPBACK}>
straight tonka truck son

#53 Foompla

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Posted 06 July 2010 - 03:42 PM

he keeps installing sloppy rear ends.


clean it up man.



"What's that?"

"Those are the head gaskets you COULD be saving by switching to JZXproject."

*music*

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#54 JimmyHoffa

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Posted 06 July 2010 - 04:04 PM

The 7.5 inch stock LSD is trash. My problems have been mostly from the crush sleeve collapsing and the pinion smashing into the diff. According to a lot of the mk2 supra guys even with a solid spacer the stock diff is only good to 300-350 horse/ft/lb before you'll shatter the spider gears, and the TRD unit isn't much better. I put in a detroit truetrac and a Weir Performance solid pinion spacer, so far it's awesome, and it's the one 7.5" diff that is supposed to stand up long past the point where the ring and pinion fail. It's helical but it still gets sideways pretty well. The last guy I know of that broke one in a mk2 supra was running a 2J pushing 700+ horse and was running slicks.

You can't fit an 8" diff in an MX73 without MAJOR modifications, like a completely custom rear subframe..

The first diff I blew up was low milage and I was only running 10psi. The second one was higher milage but still in good shape and I was being semi-nice to it when it shat the bed. In short, they're junk. I don't know anyone who's used the weir rebuild kit, but it won't change the fact that the spider gears aren't very tough.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#55 redbullx83

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Posted 06 July 2010 - 04:21 PM

Hey do u by chance have a video of ur car? it looks bad ass.

#56 Foompla

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Posted 06 July 2010 - 04:43 PM

^^ just picked one up.



"What's that?"

"Those are the head gaskets you COULD be saving by switching to JZXproject."

*music*

-end jzxproject.com commercial

#57 JimmyHoffa

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Posted 08 August 2010 - 12:54 AM

I finished putting on the 300ZX brakes a couple weeks ago. They stop really well but I think I'm eventually going to go to a bigger diameter master cyclinder for better pedal feel.

redrilled rotors, rebuilt calipers, PDM racing S13->300ZX braided lines, custom machined hubs, 10mm caliper spacers and new hub seals
Posted Image

I had to trim about an inch of the front of the brake shields to clear the calipers
Posted Image

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the brake shields clear the rotors by a few mm.
Posted Image

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#58 Foompla

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Posted 08 August 2010 - 08:03 AM

what wheels are you running? how do they clear?



"What's that?"

"Those are the head gaskets you COULD be saving by switching to JZXproject."

*music*

-end jzxproject.com commercial

#59 JimmyHoffa

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Posted 08 August 2010 - 08:07 AM

Sadly I'm a broke bastard and am running stock wheels. They clear by around 5mm.

"JZXP - we get death threats" -Rayray
-1987 AE86 Corolla with 20 valve swap SOLD
-1985 MX73 Cressida 1.5JZ Holset HX35 & MS3X
Toysport and 935 Motorsports suck. Don't buy from either.


#60 Foompla

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Posted 08 August 2010 - 08:09 AM

same :(



"What's that?"

"Those are the head gaskets you COULD be saving by switching to JZXproject."

*music*

-end jzxproject.com commercial




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