Head Gasket Drawing - Proposed manufacture.

[justinbaker]

If you have struggled to obtain parts for your TVR you will know why I have looked into this.

I have created an acurate engineering drawing, that I have plotted 1:1 scale and cheched multiple times.
The original gaskets cost £117.00 + VAT Each from TVR

I have full binaries DXF / AutoCAD / Inventor of the gasket. I was thinking of approching a manufacturer to investigate manufacturing costs, on a large batch run. Does anyone have any comments recomendations:-

My main concern is the cut outs on the spesso item for the water jacket, that I have replicated.
I would have thought that this needs to be adjacent to all the cylinders. That is shown on "VIEW-A".
I have included the original gasket below too. I will speak with Paul at Austec to see if this should be so.

[GreenV8S]

It's a complicated area and not something that I would tackle lightly. To start with, you probably want to ensure that you keep the size, shape and position of the water way holes exactly the same as the originals. Don't try to 'improve' anything by un-blanking holes or opening them up to match the block or head as this can change the distribution of water flows within the head with disasterous results.

You also need to ensure that you don't change the distribution of clamping loads between the head and block, which means getting the right gasket construction. Obviously you need to ensure the fitted height is right too.

I've bought copper gaskets from www.ferriday.co.uk in the past, and maybe they would be able to help you. It would be ever so easy to mess this up though, so I'd be very cautious if I were you.

[justinbaker]

Peter, Thanks! - I have just sent off the engineering drawings to them for batch pricing. Some copies have gone to Paul at Austec to look into the cooling aspect!
The gasket from Spesso measures exactly 2mm THK.
The DXF you can download here...
www.racecarlivery.co.uk/SP6.DXF



>> Edited by justinbaker on Monday 7th November 15:58

[chris watton]

Cheers Justin! Open source TVR componants, I like it!!
I can't see the drawing though, tried both AutoCAD 2002 and TurboCAD Pro 11, I just see a blank screen! what am I doing wrong?

Ah Ha, just realised they're in the Layout pages! (only been using CAD for 5 years!!)

>> Edited by chris watton on Monday 7th November 16:07

[justinbaker]

Zoom all Chris!! While its open, do you want to make a start on the pistons and block please, or start extruding out the head?


>> Edited by justinbaker on Monday 7th November 16:23

[chris watton]

justinbaker said:

Zoom all Chris!! While its open, you you want to make a start on the pistons and block please! >> Edited by justinbaker on Monday 7th November 16:06

Ah Ha, cheers for that, I use TurboCAD Pro for all my CAD work, and use A/CAD to check the file conversions worked OK, same vector drawings, 2 totally different ways to achieve the same results

[justinbaker]

Sent it off to quote to a company in the USA, he asked me to re-do it in inches, no way its a metric designed engine?

"Justin...It opens fine. It just happens to be in metric form. Perhaps redo it in inches? and resend. I will get to it and email you back likely tommorrow".
Mordy Dunst
Gasket Works USA, LLC
www.headgasket.com
+626.358.1616 voice
+626.628.3777 fax
GMT (-08:00 Pacific)

0.124Kg in copper

P.S. Chris have we got a piston crown yet?

>> Edited by justinbaker as he was fecking about with the image on Monday 7th November 16:30

>> Edited by justinbaker on Monday 7th November 16:32

[chris watton]

justinbaker said:

P.S. Chris have we got a piston crown yet?

LOL, unfortunately, I'm stuck designing a kit of a Wells Fargo horse drawn coach at the mo!!, and,,,,,,,,,,,,,, what's a piston crown?? lol I could tell you what any part of an 18th Century Ship of the Line is, but engines, I have much to learn, which is why I have enjoyed reading your posts so much

[justinbaker]

Having sent the drawings, and a proof pattern to Paul Austin at Austec Racing, he is likely to have some special manufactured. As my motive was to help out with the supply of parts so I will offer any help I can to them!

It's looking better for the speed six after all!

[justinp1]

Justin,

I think your efforts for the SP6 so far deserve a lot of praise.

I cannot stress enough that it is such a shame where owners of cars need to re-engineer the fixing of catastrophic engine failures because the TVR solution does not work.

When it becomes the case that owners have to do technical drawings and copy parts and get them manufactured because TVR cannot supply them it is surely a bit of a farse?

I wonder if NS knows the lengths people are going to just to get their car on the road!? If I knew this about my company I would certainly do something about it.

This said, I am tempted to get back into Tuscan ownership in the next two months. I think though since the last time I owned a Tuscan, also from personal experience, apart from HL Gorner who have been great I would be much more willing to try the 'Non-TVR' route in getting niggles and major work fixed.

Keep up the good work Justin, its going to make a difference for a lot of people!

[yzf1070]

justinp1 said:

Keep up the good work Justin, its going to make a difference for a lot of people!

HERE HERE.....Keep it going Justin....you may get a freelance contract thro the door from NS......

[kipper_]

I too am having real problems getting parts from TVR however I am now taking a different approach in that I am writing to all the directors of TVR and informing them that if they do not resolve the situation I will be forwarding on all the information I have gathered on the speed six issues and forwarding it to both the motoring and popular press as well as consumer press.

Anyone who wants the directors names and address can contact me thru my profile.

It makes me furious that I have to do this when I am willing to take the cost of repairs myself and only want TVR to supply the parts I require.

This is not too much too ask

[justinbaker]

thank you, I am in the process of trying to obtain a 3D Scanner, (Reverse engineering) to export the data into the CAD systems here. I sold one a while bck like a muppet as it wasn't being used.