Photobucket has broken all hosted photo links in this thread. I am hugely apologetic but there is little I can do at the moment other than pay their US$400 extortion fee or hope that the internet bands together for a longer term solution.
In the meantime I will look for a more reliable image hosting location and link to the photos. I will not personally be re-linking each photo but I can try and upload them in a single spot.
Dadson Racing – 2010 Rebuild
Well, originally I wasn’t going to start a histogram on this build; I wanted to keep it to myself and just appear one day with a totally new car. But (there is always a but ) then things changed and what was once going to be a quick re-spray with fibreglass front and rear end has turned into so much more.
The History: This car is an English delivered 260z that now resides in Australia. Back in the day rust-proof meant coating the entire car in grease and tar. The panels from the underneath of the car all have about 2-3mm of tar on them and the inside of the car was sprayed on the panels. 33 years has done its worst and now all that grease is pooled in nooks and crannies EVERYWHERE.
I’ve owned this car since I was 15 (2004), the day before my 16th birthday and I got my L-plates. The first time I drove it was on the race track. Since then I’ve never had enough money to do more than keep the old girl in good enough condition to enjoy her at the track. Now, a newly graduated uni student with no financial ties and a new job I want to tackle the project I have dreamed of since I first drove this car all those years ago, sideways in third =D
When I started this project my car weighed in a hefty 1180kg (2600 pounds for the slow Americans). This puts it in a territory heavier than some of the 2+2 cars I compete against. I did the sums and thought about a 3.1L motor. With 175rwhp on tap and an expected gain of 30rwhp (17%, 173.7hp/tonne) for probably not much change from 10k I thought about what else I could do to get some decent performance from the car. Keep in mind I already set the benchmark for the guys I compete with and consistently go undefeated in fastest times. Basically, I want a fun, street driveable race car without trying to totally blow away the competition. In the regularity events here in Perth, there is nobody in my class faster than the zed I could possibly catch in a zed without a turbo motor, so I want to stay in touch with the zeds without having people chapping too close at the bit.
Introduce bright thought number 2: Weight loss!
With weight loss I will not only gain straight line speed but also stop and turn faster. When 2km/h increase in speed around the local track is worth 1s I rekon I can take more than this out of the car with weight loss.
100kg (10%, 166.7 hp/tonne) less in the car will give me almost the same extra power to weight ratio of that 3.1L too! All things equal, 10% less weight to haul around the corners should give more than a 2kph (1.7%) corner and straight line speed increase. I could do the maths, but it’s late
So, the goal: Take 100+ kg out of the car, make it a show stopper and track stomper, for not much more than a cheap stroker-motor build. 1050 is the target, but lower would always be nicer.
To get 100kg out of the car should be fairly simple. With a literal metric ton of rust proofing sprayed on the car back at its birth in the UK the car is carrying a lot of tar and grease. I want to remove all the old fashioned tech rust proofing and apply more modern stuff. So, the parts to get me to 1050 or less kg:
Fiberglass mud guards
Fiberglass front and rear bumper bars
Acrylic rear window
Acrylic winding side windows
Acrylic quarter windows
Replace sunroof with a new roof skin
1” master cylinder
Fiberglass driver and passenger seats
PWR Aluminium radiator
Aluminium Radiator Air box
Fiberglass Cold air intake box
Aluminium front splitter
Full ground up bare metal rebuild
Front strut brace, braced across, to firewall and to front chassis rails
Delete old-school grease and tar
Metallic blue paint
High-tech sound deadener and rust-proofing under body coating
Powder coated suspension
Roll centre adjusters
On car adjustable rear suspension arms
Alcantara interior trim
This year over Easter I competed in the regularity trials held annually at Mount Panorama Bathurst. I did a 2:55.4, 5s faster than the last time I went there in 2008 and clocked a top speed of 240kph. Next year I want the car there and I want to do a 2:4X.XX (probably a 2:49.99 ) and 245+kph.
Initially I was going to hoard parts and then do the rebuild in one go, but things changed and I’ve decided I will do it gradually over the course of the year. December/January will be the final deadline.
This “Diary” will cover the entire build process, any changes of mind (expect many ) and all the heartache and pain along the way.
7 April 2010
Headlight Covers, new roof and 1” master cylinder purchased. The car is in Sydney in these pics and has a 3500km truck ride to get back home before work can start
20 April 2010
Roof sent to the panel beater for storage. New PWR Aluminium radiator ordered.
30 April 2010
I ordered Roll Centre Adjusters (RCA’s) and Rear Control Arms from Techno Toy Tuning. I already have their front torsion/compression (T/C) bars and LOVE the strength and over-engineering of their parts. I had a T/C snap at 200kph on full brake into an 80kph 90o right hander and don’t need another similar scare again.
Unfortunately the box was pretty tattered when it rocked up and one of the control arms had been damaged in transit
But, Gabriel (the great man he is!) covered the cost of the repairs and so I sent them to a shop. In the mean time I got stuck into fitting the RCA’s:
This pic shows a modified arm on the right of the pic and the unmodified arm on the left of the pic. You can see how the control arm points upwards on the left and down on the right. Down is better =D. Another quality TTT part!
The close fit with standard rims. In fact I had to remove the wheel weights on the front right hand wheel because they fouled on the steering knuckle
The new look front suspension with both of the RCA’s fitted
Edited by Whittie, 02 July 2017 - 01:47 PM.