Engine mapping

^WHS! That looks like a wild ride. Does it sound as good as it looks? What a satisfying job recreating those things must be.
 
Sound on a full power run was awesome. I have a video, but don't think there is enough giga carrots to let me upload it.
And yes, I have done worse jobs.
 
I listened to the sound on my phone, sadly the noise of the rollers was the dominant factor the microphone picked up.
Here is a pic of a finished one wearing it’s party frock instead.DADAA367-EE9C-42E9-B5A4-58CD4E716718.jpeg Ok
 
Looks superb.

Just as a matter of interest, what is the insulating material on the exhaust, and would it reduce heat transfer through the body of a P6B?
 
Mike
The exhausts are wrapped with a generic exhaust wrap. I do them with the headers clamped in a vice as it is fiddly to do. The P6B headers could be done, although I don't know how pretty it would look, certainly they would have to be removed.
On our cars the headers pass under the passenger wing, heat is a big problem, as well as the wrap the whole of the underside of the wing has reflective heat material glued to it, as well as the sill area. Sometimes we also fit a sheet alloy heat shield over the top of the headers.
It will reduce under bonnet temps, but it would be easier to glue on a reflective sheet on the bonnet, I did this on the blue car, had two areas each side over the headers.
For your footwell areas, something like dynamat on the inside under the carpet might help.

Exhaust Wrap from Merlin Motorsport
Aluminium Foil / E-Glass Fiberglass CLOTH
Thick Car Van CamperVan & Boat Sound Deadening Heat Proofing Insulation -Dynamat | eBay
 
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Many thanks and sorry for hijacking the thread. Have a spare set of manifolds which I've contemplated getting ceramic coated but hesitated because I felt it would just move the heat further down the body shell. Have a louvered "summer" bonnet Series 2 which we have been using for the last 25 years or so. Engine never runs hot, just puts the heat into the car.
Think your suggestion of heat shields and insulation is very valid and will do something. Apparently there is an insulated aluminium sandwich shield for Ford Falcons which might suit.

Again the Aston looks superb, assume these are built to order?
 
Hi, Exhaust wrapping is OK in the short term but longer term it can cause cracking because of higher heat cycles and corrosion if the wrap retains moisture.

Colin
 
Mike, yes built to order, occasionaly a spec build gets done, usually to update the demo car.
We now get very few GRP orders, most are all alloy, those with deep pockets spec Aston engines.
Peter, I think a P6 would look very classy in the colour.
 
I bought a P6 with mild steel four into one manifolds wrapped in asbestos woven stuff. They had cracked.
I had the tunnel of my base unit lined with self adhesive heat reflecting silver foil sandwich stuff supposedly from the space industry! Astronomically expensive. Actually it wasn't but I couldn't resist that. I don't know if it does reduce the temperatures in the passenger cabin, but it looks great from underneath the car! LOL.
I gotta say Peter, have somebody photoshop some pix of your car into that distinctive shade of green before you actually spend your money at the paint shop! I reckon it would be waaay too gaudy on a P6.
 
mrtask said:
I gotta say Peter, have somebody photoshop some pix of your car into that distinctive shade of green before you actually spend your money at the paint shop! I reckon it would be waaay too gaudy on a P6.
Click to expand...

It's most likely going Zircon blue. I've looked at many cars that are non-standard colours and they often look fantastic but it's very hard to get past the "oh look a P6 in a non-standard colour" - the exception being Admiralty blue - Rover were insane not to offer this and instead both Zircon/Corsica and Zircon/Scarab which are quite similar. I'm certain with authorities, Police and business customers it would have been a winner. That's the conditioning of 40 year of P6 fandom - I'm guessing most people would think it's cool. And of course selling the thing is a function of how much any buyer shares your taste. I'm also not convinced a metallic colour is a great idea in a long term ownership classic car with regards to localized repairs.

As for "gaudy" I'm thinking more of look of period metallics specifically Fords "mink blue" (although hopefully it won't fall off like that did). The enemy here could be the ultra high gloss of modern lacquers but I think that can be somewhat dialed back. Also the "flake" size is very much smaller in these vintage colours. Certain "platinum" doesn't look that way on VIPs, in fact it's surprisingly flat in real life and requires every bit as much polishing to make it "pop" as a regular colour. Certainly period pictures of Aston Martins compared to modern restorations can really look quite different with this regard - modern ones are just "too good".
 
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I love the sound of triple Webers on an Aston straight six. Currently working on designing an air box and induction setup on a hot DB4 GT.

What are you using for velocity stacks. I’m finding what they have on from Weber are pretty poor for flow.
 
Hey Steven
You have me there, I think they are 45's on the Jag, with the stock Weber length, which is around 50mm or so, I will check next week.
The Astons I know are 45's, again the same length.
We have packaging issues with the wheel arch being close in that area, so have to keep them short.
The cars only weigh around 950kg, so 250 - 275hp is entertaining, we did have a customer spec a hot 300hp engine and it was mental, I remember taking it out and it was breaking traction routinely in the dry, certainly kept me awake.
If the DB4 GT is a real one, that is some bit of kit, kudos to you sir. I take it you are going for an enclosed airbox with trunking to a cool spot up front ?
 
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