ZD44TT Posted April 21, 2008 Posted April 21, 2008 Haven't really started on the suspension yet. The car already has 5-step adjustable shocks and aftermarket springs, but I plan to make custom coilovers based on HSD products. I have Techno Toy Tuning adjustable caster rods on the front too, but as the above post mentions, it is worth making the toe adjustable on the rear. I had adjustable toe on my old 1JZ powered 240Z and it made the rear end much better. All that said, the car doesn't feel too bad as-is. The worst problem is bump-steer at the front. I don't think aerodynamic lift at the rear is such a big issue, but I suppose it depends how fast the track is. Yeh i've heard of this as well......the rear toe issue. Whats HSD? I've got 50mm Bilstein coilovers in mine from Heismans in Sydham and their not bad.....but it's in the aligment where I think mine isn't quite right yet. Quote
BenZed Posted April 21, 2008 Author Posted April 21, 2008 HSD is the suspension brand I distribute. See www.otomoto.com.au Quote
BenZed Posted May 3, 2008 Author Posted May 3, 2008 bump steer is easy to correct in comparo to the toe issues in the rear. redrill or slot the crossmember for LCA pivot re-location, or those bulky spacers!!! nato Just spoke with Stewart Wilkins about this. Changing the control-arm pick-ups does help the bump-steer, but you wind up with different roll-center heights front to rear. His solution is specially designed steering arms which also improve toe-out when steering close to full lock. Unfortunately like all clever bits of engineering, they don't come cheap. I just dropped the car off at SWR to have the DR30 R200 LSD fitted, using modified Z31 driveshafts. Having proper drive a the rear should reveal what the rest of the suspension needs. Basically suspension and brake upgrades are all I have left to do on the car now. Performance-wise I am quite satisfied. Quote
ZD44TT Posted May 19, 2008 Posted May 19, 2008 whens this car making an appearence? not planning on top secret M7 runs are you?.........LOL.jk Quote
BenZed Posted May 19, 2008 Author Posted May 19, 2008 Nah, I'm more into the windy stuff. The diff is in now and the car drives really well out of corners. I also fitted a new master cylinder and reco booster this week, which improved the braking quite a bit. Also adjusted the rear brakes properly which helps too. You don't have to yank the handbrake up so far either Quote
ZD44TT Posted May 19, 2008 Posted May 19, 2008 what are you aiming for in terms of time at wakefield? Quote
nat0_240_chevZ Posted May 19, 2008 Posted May 19, 2008 bump steer is easy to correct in comparo to the toe issues in the rear. redrill or slot the crossmember for LCA pivot re-location, or those bulky spacers!!! nato Just spoke with Stewart Wilkins about this. Changing the control-arm pick-ups does help the bump-steer, but you wind up with different roll-center heights front to rear. His solution is specially designed steering arms which also improve toe-out when steering close to full lock. Unfortunately like all clever bits of engineering, they don't come cheap. I just dropped the car off at SWR to have the DR30 R200 LSD fitted, using modified Z31 driveshafts. Having proper drive a the rear should reveal what the rest of the suspension needs. Basically suspension and brake upgrades are all I have left to do on the car now. Performance-wise I am quite satisfied. Ben, that suggestion was the easy route for fixing bump steer. to not alter the roll centre the other option is to modify the crossmember to lower the rack mounting position, im just not sure as to what fab work you lend yourself open for ....... you could go and spend big bucks on things you dont even realy need but is just easy caus your lazy, depends on how dirty you want to get your hands. You could modify another crossmember as to keep your car on the road (or off as lil as possible). SW steering arms i would be interested to see.... as using the CA spacer below the strut also affects your front end roll centre. having different height RC's affect the way your car loads the front before the rear kinda skewing the car into the corner, promotes understeer if excessive, but using the roll centre change can be advantageous depending on track conditions and attitude of the car req'd for quick transitions. Some bump steer is desireable as a zero condition is not as ideal when hitting full bump on the outside/loaded wheel as it lets the tyre give a lil and has that last bit of grip before letting go. it would be good to see you car in action, this is one of the cars that the owner has the right intentions for outrighht performing charachteristics in mind... am watching this thread............ nato Quote
BenZed Posted May 20, 2008 Author Posted May 20, 2008 Yes lowering the rack is another option, but the modified steering arms have the second advantage of moving the pick-up points further out relative to the steering axis as I mentioned. I have seen similar modifications done in Japan where the arms were cut and welded, but that sort of thing doesn't go down too well with CAMS officials here , so the billet arms do appeal to me. I'll look into it more when I do the coilover modification. Quote
BenZed Posted May 21, 2008 Author Posted May 21, 2008 hmmm a 1:09 around wakie would be nice to see. Will get down there as soon as the brakes are done. I've also entered it in Superlap at Oran Park GP on July 5th Quote
nat0_240_chevZ Posted May 24, 2008 Posted May 24, 2008 ben looks like il be moving my stering rack down not to decrease/eliminate bump steer but to get the vh45 down about 10-15mm lowere, as x-member sits about 30-40mm+ lower than the rack mounting brackets!!!, a worthy mod indeed in this case you'll see what i mean and it really isnt that hard at all, i will document (with pics ) the process to do it simply and mantain the stock mounting rubbers & steering shaft (just new clamp brackets) see pic nat0 Quote
BenZed Posted June 18, 2008 Author Posted June 18, 2008 Just fitted the carbon tail-light garnish from Restored to my car. The original garnish is 1.33kg, compared to 250g for the carbon one, but at $500 I have to admit I just did it because I like carbon Quote
Aaron Neubauer Posted June 18, 2008 Posted June 18, 2008 That looks hot! I wondered what the carbon fibre surrounds looked like on a car. How 'fat' is the zed now? Quote
BenZed Posted June 18, 2008 Author Posted June 18, 2008 Thanks. Here's another bit I bought from Kameari. The original cowl panel was 2.28kg, this fibreglass one is 1.36kg, so it saves less than a kilo, but on the plus side it fits perfectly. Quote
Moderators Zedman240® Posted June 18, 2008 Moderators Posted June 18, 2008 Do you have the carbon front bar as well? Hope you don't park in the zed in any public spaces. How many zed front bars do you see with tow ball marks? One touch and it's all over.... The tail light surrounds look awesome... have to get me some when this conversion is done...... Quote
BenZed Posted June 18, 2008 Author Posted June 18, 2008 Do you have the carbon front bar as well? Hope you don't park in the zed in any public spaces. How many zed front bars do you see with tow ball marks? One touch and it's all over.... The tail light surrounds look awesome... have to get me some when this conversion is done...... Yes, both are carbon Quote
BenZed Posted June 18, 2008 Author Posted June 18, 2008 Took the Zed to WSID today to do some quarter mile runs. The best was a 13.66 at 102.2mph, which was with the original 3.9:1 diff ratio. This ratio really kills it, as you barely get into fourth before the line. I'm fitting a 4.875:1 Kameari gearset next week, which should make a big difference. Also had old, stiff A032R tyres on (they were on the Watanabes when I bought them), so the best 60-foot was a 2.04. I should be able to get that down to 1.7 or so with some drag radials. I'm aiming for 13.2 or better from the current set-up. Here's a little burnout video, not sure why the sound is out of sync. Quote
Toecutter Posted June 18, 2008 Posted June 18, 2008 Ben, we really do need to do a feature artical on your car for the front page. Sulio Quote
Administrators gav240z Posted June 18, 2008 Administrators Posted June 18, 2008 Yeah Ben, c'mon lets put an article together . I'm getting sick of the front page, needs an updated featured ride. Let me know if I can do anything to help. Nice burnout btw, would of liked to see a 1/4 mile run though . Quote
BenZed Posted June 18, 2008 Author Posted June 18, 2008 Yeah Ben, c'mon lets put an article together . I'm getting sick of the front page, needs an updated featured ride. Let me know if I can do anything to help. Nice burnout btw, would of liked to see a 1/4 mile run though . Yeah sorry, the quarter mile video kind of sucked. Like watching a small white dot move slowly across the screen. I'll try to get myself organised enough to take some photos this weekend and put together a feature. Quote
zedevan Posted June 18, 2008 Posted June 18, 2008 ben your car looks awesome, although to completely finish carbon treatment flow from front to back i think it needs a carbon fibre hatch, cowl panel, and hood inspection cover things! Quote
ZD44TT Posted June 18, 2008 Posted June 18, 2008 kool..........im sure the times will come down considerably. Hey where did you get those mirrors from Ben? Quote
BenZed Posted June 18, 2008 Author Posted June 18, 2008 kool..........im sure the times will come down considerably. Hey where did you get those mirrors from Ben? I got them on Yahoo Japan, but they're also available from Kameari at about $250. Quote
BenZed Posted June 19, 2008 Author Posted June 19, 2008 Got this sticker with the carbon tail light garnish from Restored, it cracks me up. For those who don't know, Ken & Mary was a company that sponsored the most successful GC110 (240K) shape GT-R race team, so that shape is known as the Ken-mary in Japan. The earlier KPGC10 GT-R is called the hakosuka, which translates as box-skyline. Quote
ZD44TT Posted June 19, 2008 Posted June 19, 2008 I got them on Yahoo Japan, but they're also available from Kameari at about $250. sweet..........i'll get the hook up at tax time. did those tyres give you any grip? the tread looks way overdue but the 60ft is ok though. Quote
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