Plasticfantastic's project corner, Back on the F40.....

really like the shape of the duct...and agree that it needs to be tighter to the car. the way you have it swooping at the lower front of the duct is really nice.

JP

Looks much better in the last shots...can you not make it more 'built into the rear wheel arch' like the cayman or 911 turbo??

It's your car and do your thing. It looks like you know what you're doing already.

Stylistically I like how you've re-aligned a section of the door to lead into the duct. Just looking at what you've done, I can see you're thinking about what looks 'right'. Aerodynamically, I can't see how it's any worse than zero air feed from the side, even though the side of the car is a low-pressure area (in my simplistic understanding of car aero). From one of those angles the scoop does look a tad too far out, but would seem to catch air and bring it into the engine bay (from my non-aero-engineer stand-point once again).

H-D engine : well I don't know much about them, but folks seem to bang on about Imp engines in Ginetta's, so perhaps there's something in what many might think is any odd engine choice

I've worked on a few GRP cars, but never come across voids filled with foam. I can see the strength arguement, but when it gets old and damp it must be a pain.

I like how you're going about this. Keep it up. Do your thing without whatever the rest of us think. What you're doing looks like it's working so far.

oh, you mean the NACA style vent that would be on top of the fender, now I see it...boy you will have alot of vents in that area...cant really tell by looking at just that piece...but in general I do like the look of them....not sure about the placement, though.....



JP

Could you not duct air from under the car over the engine?

Hi all,

Got out on the Dav today, but couldnt face another day of itching so i decided to dismantle the front suspension ready to rebuild it. I have taken apart the drivers side, and taken the drum off the upright as i plan to convert to discs all round. With the wishbone off i decided to attack it with the angle grinder and wire wheel. An hour later and it cleaned up pretty well and its a nice solid wishbone. Tomorrow i might have a go at cutting the seams off and rewelding the wishbone, it should look neater and save a little unsprung weight. I popped the old rubber bushes out and a thought jumped into my mind that a few years ago my father, a self employed toolmaker now retired, decided to knock up a mold to make polyurethane bushes for his morris van project. Remembering there is a box somewhere with poly bushes of different sizes and shores (sp? hardness!) i went for a rummage. Successful in finding the box of bushes i thought the chance of anything fitting was remote but to my suprise they pressed in like a charm, i just needto hunt out our stainless tube now.

With the wishbone done i spent the rest of the day huddled over the sand blast cabinate and cleaned up the wishbone brackets, all came up really well and i will probably just give everything a quick coat of satin black for now.

After spending most of last night reading through a thread on the imp forum i think i might have changed my mind on the harley engine. Instead i might stick with the imp engine, using the one i have now to get the car up and running and in the meatime build up another 875cc into a 1040cc with a Kawasaki zx7r 16v head fitted,and if I'm going that far it might as well have a supercharger too.

Thoughts?



















Comments appreciated as always,

Cheers

Cheers Smeden

Hi all,

I had a couple of hours on the dav today so i thought i would have a go at the front wishbone i tidied up yesterday to see if i could get it looking a little better and hopefully lighter. So i started with a standard imp wishbone weighing 4.45kg's, its not quite finished as i plan to round off and plate the area behind the poly bushes, i also need to finish and dress a few more welds but so far i have the weight down too 3.15kg's which I'm pretty happy with.

Sorry theres alot of pics but hopefully it shows the progress....





































































Comments appreciated

Cheers

What pivots and what does it achieve? and by how much?

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