Dr Jeckyll

[zukitek]

matter of budget really. I could go with a clutch type but unless I get a second hand deal that is a 900-1k adventure. A torsen can be had for under half that second hand from an S15. Sure I could weld it but that is pretty darn tough on tires and sux as a daily .

I could go OBX which is a quaiffe knock off but I have heard poor reviews from those ranging from bad fit and manufacturing to poor longevity so I am leaning away from that one . I have a spare VLSD that I am going to tear apart and see if I can do some creative shimming to get some extra performance from it.

Do you have a hookup for a clutch type LSD?

[TouringBubble]

Notice any issues with the gargantuan TB? I've had lots of TB discussions while planning the Beetle's setup and the one thing I could wrap my head around was "usable" throttle range. If the TB is oversized, you might get max airflow at 70% throttle, so the extra 30% of the pedal does nothing. Have you noticed anything like that?

[zukitek]

the thing I have noticed and its not a stumbling block with a standalone but with a factory ECU it might be . The throttle angles have extremely low TPS angles for instance when I am cruising at 70 MPH in 5th I only have about 3-5% TPS angle. Also am having a small issue with being able to get a low enough idle speed because of the sheer size of the plate allowing too much air even when the plate is totally closed to the point of plate to bore bind . Its nothing crazy but a minor annoyance . It idles at around 1100 with the IACV totally shut and allowing 0 bypass air . I can retard the idle timing just a tad and I should be able to get that where I want it . Right now I have 21*advance at idle so I have some room to back that down just in that cell of the table without much fuss from it anywhere else, but there again that may be a stumbling block on a factory ECU.

As far as throttle response, I have not noticed any problems there with the exception of it just being less progressive but that is a thing I have had no problem adjusting too on a manual trans older car like mine . My A/c compressor control is not being controlled with the ECU so kickout is not a concern as it is affected by TPS on some other cars and mine was originally before the MS install. Every install is going ot have differant selection criteria with throttle body size but for me it has worked out pretty good . and if I decide later on that its just bugging me I will just bolt a Q45 TB on it and go .

[TouringBubble]

I've considered adding a restrictor tot he Beetle if needed. Might not help too much with idle, but it should help at high throttle if an issue did exist.

[Cholewa]

As far as diff's go, have you considered an Ausi locker?

[zukitek]

As far as diff's go, have you considered an Ausi locker?

Ill have to google that . I have never heard of it. Went to their sight and they dont have an application for a nissan. From the looks of it they are geared towards 4wd stuff . There are HLSDs all over ebay for pretty good prices so that is probably how I will go.

[nicktcr]

matter of budget really. I could go with a clutch type but unless I get a second hand deal that is a 900-1k adventure. A torsen can be had for under half that second hand from an S15. Sure I could weld it but that is pretty darn tough on tires and sux as a daily .

I could go OBX which is a quaiffe knock off but I have heard poor reviews from those ranging from bad fit and manufacturing to poor longevity so I am leaning away from that one . I have a spare VLSD that I am going to tear apart and see if I can do some creative shimming to get some extra performance from it.

Do you have a hookup for a clutch type LSD?

Welded is slightly annoying on a daily, but honestly isn't THAT bad...other than the noise it makes in parking lots. But it isn't like "OMG SO SCARY" in the rain or anything like so many make it out to be. You're a competent driver and would have no problems with anything like that.

It is a tad tougher on tires than any other LSD option. But you might try it, really. I know I joke about mine a lot, but it isn't as bad as people make it out to be.

From my own experience with a VLSD in a few different TT 300ZXs, their diffs lock a LOT better than the J30 or S-chassis diffs. I was actually able to keep them locked while drifting in slow and tight corners. Felt really pretty nice for a viscous.

I do not have a hook up on clutch-types, unfortunately...they just really are that expensive :/

[zukitek]

well ,as I suspected the clutch just was not up to the task. I drove it 3 days and it never stopped breaking loose in 4th and 5th so I gritted my teeth this morning after I got to work and ripped the tranny out and pitched the stock 225 MM clutch in the floor and installed a 240MM clutch and flywheel from a 93 D21 hardbody pickup in and took him for a rip up the mountain on 280. That clutch is working fantastic, was cheap as hadies ($55 for a new flywheel and $82 for the clutch kit). The pedal feel is heavier than the stock 240 clutch which was too light for my taste but just right now . BTW ...the supercharger pulley that was supposed to yield 13 PSI max turns out to be making 15PSI from 3k to 6k....absolutely fantastic . So far so good ...I rescaled the VE and spark tables last night to account for the extra boost but I am still taking it easy untill I get the 200 KPA VE cells where they need to be . Not comfortable enough with the tune yet to beat on it at the TNT but getting close enough to take it to the dyno soon to dial in the timing table.

[engled]

but getting close enough to take it to the dyno soon to dial in the timing table.

Who are you taking it to?

[Cholewa]

He'd damn well better be going down to montgomery and letting sam play with it.

[zukitek]

He'd damn well better be going down to montgomery and letting sam play with it.

I am tuning it myself so I will most likely just rent some time on blakes or speedsouths dyno.

[EWaugh]

Forgetting recent history...Ricky is capable of keeping it from blowing up. However Sam may be able to make it fasterer

[nicktcr]

I have a spare VLSD that I am going to tear apart and see if I can do some creative shimming to get some extra performance from it.

I know this is from Zilvia (def not the most amazing place for intellectual knowledge), but there's several people I know of in person that have done this.

http://zilvia.net/f/s-chassis/200226-shimming-r200-j30-vlsd.html

These are apparently the different sized shims you can get from Nissan (allegedly each costs about $6.00):
38424-40F60 =0.80mm
38424-40F67 =1.01mm
38424-40F75 =1.25mm
38424-40F83 =1.49mm

Even drift guys say the 0.80mm is plenty, as it locks very hard. So there's something to look into. For the cost of a tube of RTV, and a $6.00 shim, you could have a nice LSD.

[w. leavitt]

Who's Sam in Montgomery? Sorry to butt in.....

[EWaugh]

Sam collier III. In the past he has auto-x'd Volvo turbo wagons and road raced in IT7, an RX-7 class. He is the owner of a 9 second 240SX and tunes cars and welds aluminum on he side