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Hi Bob I've got a Tilton triple carbon in my RF40 and so far it's been fine apart from some shudder on takeoff in 1'st. Engine is 550hp and gearbox RBT ZF. It's only been in for ~1000 km's and used for both road and track. The clutch was a used unit from one of the Supercar teams with plenty...

Just to add a bit more - I don't want to extend the mounting bracket down below the engine cover for extra support. I only want to use the two roll bar mounting holes that are already there.

Howard, thanks for the reply but you misunderstand. I need to bolt a steel plate to the roll cage bolt holes which the harness buckles then bolt to. ie. a support bracket which does not attach at all to the engine cover. I need to know the minimum thickness the steel plate needs to be to provide...

I need help with working out minimum steel plate thickness and design to attach shoulder harnesses to. I have a 6 point Sabelt to install into my RF40, but the standard attachment points are too high for the shoulder straps. The first photo shows location of bolt holes in roll cage (10mm) and...

I need some advice on the color of the plugs from my road engine. The engine is a std 302 Windsor from an Aussie 90's AU series Ford Falcon with Motec M800 and 4 barrel fuel injection. Also 4 into 1 exhaust with cats and no crossover. The fuel map is an emission map to get the car registered, so...

Good news - Found my seats! Apparently they were mistakenly delivered to a customer who only recently unwrapped them to find they weren't his. Thanks to Paul from Roaring Forties and to the gt40 forum for your help.

Thanks for the suggestions, and the offer of the seats Chris. The upholsterer is lending me 2 seats to get the car registered. The history is that I originally took the seats to the upholsterer late '06 to have the padding reduced. I (stupidly) left them there for a long time (they are 1 1/2...

The upholsterer has said that my seats are unique and he has not made another set like them, so this is one thing in my favour. I hope they turn up soon because the car is nearly ready to be registered.

Sorry Ron if this is in the wrong section - move if necessary. I had my seats made in Melbourne Australia last year by McBride Auto Upholstery and they have disappeared! I took them back for modifications to the padding and left them there for ~5mths while the car was being built. When I rang...

JacMac, Do you know of any disadvantages of having an aluminium block? An engine builder said that I would need to check torque settings more often due to more expansion/contraction of the aluminium, but didn't mention anything else. Are they reliable long term for racing use - ie. with ~500HP...

Good info JacMac. Always smart to be able to easily build in more power if needed at a later date - also to over build and run slightly detuned for reliability. I am having discussions with a V8 Supercar builder locally, but I suspect will cost me a lot more to get built here rather than in...

Thanks for the advice. The horsepower and torque of the engine will be more determined by the ability of the drive train to handle the power rather than what the Porches are putting out. I suppose I want the maximum HP and torque that the ZF can handle while still being reliable and able to...

Guys - I need some help! I'm finishing my Rf40 this year which will be first registered with a standard engine, then used for a few years as a race-only car for road circuits with a second purpose built race engine. I don't know exactly what components the race engine should have to be right...

Gidday Chris, I've got Motec on my 2 bikes. I swap the ECU from the race bike to the road bike and download a different map for each. I just use an old laptop and it's fine. I've got a wide band lambda and use it to fine tune the fuel map at track days. It's pretty easy and fun. I've also got...

Been riding since I was about 11 yrs of age after pleading with Dad to take me to see 'On Any Sunday'. It must have worked because shortly after he bought me a bike! Since then had trail bikes, motocrossers, roadbike, and racebikes. Currently have a Ducati 851. Bought in '91, turned into a...

Chris, have found a bit more info on the heads. Apparently there were some problems with wear on the valve stem tips, but that has been addressed by a redesign of the rockers. I am currently following up more info from someone who has bought a set to use for racing. They have also said that they...

Just been perusing web site for 32 valve heads, and they look horn! www.araoengineering.com/ Has anyone had any experience with these heads? Advantages/disadvantages? Gordon - have you used these at all? Cheers