Hi all,
This is my 1st post to this so if its inappropriate please let me know.
I'm building/heavily modifying an 1967 MGB roadster. The cars been
being built for many years now and is probably only 9 months from
completion.
Since the list of changes is too big to mention completely I'll just
give a quick overview (MG purists should leave now 8-) )
Body: Removal of all trim/bumpers. addition of front spoiler.
Entire body/chassis back to bare metal and painted with the
Midnight Blue of the current Honda Prelude.
Chassis: reinforced and seam/stitch-welded. Full Chrome-Moly roll cage.
Diff: Cut down ford 9" with aluminum centre and full floating axles.
Gearbox: Getrag 5 speed..same as what came in the BMW 635CSI
Motor: Rover 3.5L V8 using a crank from the locally built Leyland V8 to
bring the capacity up to 4.4L. 9:1 compression. Late model 3.9L
rods. Cosworth Forged pistons. Roller-rockers . Race Cam.
Dry sumped. Crank Girdle.
Induction is with a custom built manifold running one injector
per cylinder controlled by a MOTEC (Australian brand) computer.
The MOTEC does spark timing and fuel timing all computer mapped.
Needless to say there is no distributor.
To cap it all of is a single turbocharger running between
7-20PSI of boost. HP should be about 400 on 94 Octane leaded
petrol..and 600+ on 100 Octane.
Suspension:
Rear: 5 link rear end with coil-over shocks/springs
Front: Hand fabricated front crossmember/A-arms with Magnesium uprights
etc
Brakes:
Rear: Ford 11" ventilated discs with single spot calipers.
Front: 13=" ventilated discs with 4 spot calipers
The car will be road-registered and road-driven (In Australia)...
I intend to do hill-climbs,drag racing, road-rallys and just plain
drive it.
The bit missing from above of course is wheels. This is where I'm
looking for help. The rear end will run slight tubs and I will be able
to fit 10" wide rims with a 255-265 width tyre without problem.
On the front is where I'm stuck. Simmons wheels in Australia make
beautiful 3-piece magnesium wheels so my brand is pretty much fixed.
I want to fit 18" x 7" wheels on the front with a 235 width tyre, since
this is the skinniest 18" tyre you can buy (as far as I know). From
looking at the MG and various books I reckon a 205 is a pretty tight
fit. I can fold/remove the front guards inner lip ,and given the
suspension will be fairly stiff ,and also hand-made with wheels made to
any offset I desire, I reckon the 205 should fit no problem....The 235
may be another story however. Given the money I'm spending I'd love to
fit the 18" rims.
Has anyone experience/advice concerning 205 or larger width
tyres????...I've seen stacks of pictures of MG race cars and they would
appear to have very wide tyres on the front....On a race car however
maybe a little bit of tyre fouling is acceptable....
Any advice greatly appreciated.
Thanks heaps
Byron Lister (TSG_BHL@OPCO.ENET.DEC.COM)
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