[GT6 MK3 (Aug1973) Recommendations For Head Work Needed.]

4 minutes ago, thescrapman said:

Is there any clue as to what cam is fitted to the short engine?

ISTR the Fitchett engines are very late 2000 saloon engines, so may have a cam of a less sporty nature, which won’t suit the GT6 really.

It will need a GT6 cam and you will also need to raise compression a bit I suspect, which will be skimming head as it is domed pistons.

As it is a new bare head, may as well get seats fitted as there won’t be any lead memory. 

What size valves does the head take? There are a few variations.

 

 

The new short engine does not come with a camshaft.  The part number stamped on the short engine is listed in the MK3 GT6 Parts Book so I believe it is the correct engine. That's certainly how I purchased it.  I will measure the original valve sizes.

[GT6 MK3 (Aug1973) Recommendations For Head Work Needed.]

3 minutes ago, clive said:

Is the cylinder head brand new? 

But you shoudl be able to source good spares, though you will need to do your research. Bear in mind if you supply all the bits, the builder will not warrant any of them. 

So maybe have a word with Chris Witor, he tends to only sell good stuff, and will be able to offer advice. As to cam, something like a mk2 GT6 cam is a very good all rounder. Chris does a special cam based on that, again he can advise. 

Yes, brand new, old stock.   Thank you for the CW recommendation.  

[GT6 MK3 (Aug1973) Recommendations For Head Work Needed.]

When I acquired my car it was missing its engine apart from all ancillaries.    I acquired a NOS Short Engine - Part No. UKC559 (domed top pistons) from TD. Fitchett along with a "bare" cylinder head to suit.  I'm now seeking recommendations for having the head prepared for use.  I'm thinking along the line of having an unleaded conversion and maybe polished and ported whilst I'm at it.  I will also need all rockers, valves, rods etc.  Should I source and pass on these items separately or find an individual/firm who can do the whole job ?.  For information - the only other upgrade I may go for is a "fast road" camshaft, when I source that.  Wont be doing any track days as wanting to keep her fairly standard.    I am Nottingham based.    Any help/suggestions much appreciated.   Thanks   Paul   

Short Block Illustrated For Info -

 

[Late 73 GT6 Swingspring.]

On 25/06/2020 at 21:41, johny said:

I suspect that the bottom plate is the wrong one if it has 6 holes and not 4. However don't know what difference this will make....

Johny, you are correct.  My clamp plate does have 6 holes instead of 4.  Looks like its been changed over for some reason in the past.

Just ordered the correct one from Canleys.

[Late 73 GT6 Swingspring.]

Never a fan of gaps myself  but as Wayne says, it could be correct at that.  

[Late 73 GT6 Swingspring.]

Hi Wayne & Johnny and all who have contributed to my thread.   

Whilst scratching my head over it this afternoon, I decided to part it from the diff and give it a wipe over.  
 

Thank goodness I did for the answer appeared before my eyes.  159654 emerged from beneath the grime which proves I have the correct spring.   I just need to check with the previous owner regarding the originality of the diff.  
 

Many thanks though to all who contributed to answering my question.  
 

Paul
 

[Late 73 GT6 Swingspring.]

That is a possibility. I will ask the previous owner as to what he knows.    

Paul

 

 

[Late 73 GT6 Swingspring.]

Thank you Colin.  Very useful table.  I will undertake some measuring tomorrow.  159654 is the part number my parts catalogue says I should have so some measurements should guide me to what I have.  

Paul

[Late 73 GT6 Swingspring.]

Thanks for your thoughts Johny & Colin and interesting thread Badwolf.  Good nighttime reading there.    

[Late 73 GT6 Swingspring.]

Last year, I purchased a late 73 Mk3 GT6 totally dismantled but importantly missing its  swingspring.   At the last Stoneleigh spares meet I managed to  purchase what I was told was the correct 5 leaf spring for my car.    Upon trial fitting it to my diff yesterday I ended up with what you can see in the attached photo, with associated gaps.   As I've never seen one assembled, does this seem correct.   It just appears to me that the machined slot in the top of my diff is not deep enough to fully take the thickness of the lower leaf.  Or is it correct and I'm at fault ?.

Any thoughts greatly appreciated.  

Paul

[Mann 714/2 filter for Vitesse mk2]

Just purchased three Mann W 714/2 filters for a total inclusive price of £10.05  (£3.35 inc. each) via Amazon.

Hope this helps.

Paul.

[GT6 Carbs leaking fuel]

Quote

 

Graham, have sent you a pm.

Paul

 

 

[GT6 front road springs and dampers.]

On 27/04/2020 at 00:04, Adrian Saunders said:

I’m rebuilding the front suspension of my GT6 mk3 and I need some help with the coil springs and dampers. I’m going to remove the springs and check the free length and wire diameter. The dampers are Koni Classic. Are the free lengths and wire diameters if supplied springs available? The dampers are adjustable. Are these the ones that need the spring to be removed and the damper compressed to solid to facilitate adjustment? 

Adrian, may I ask, what colour your Koni dampers are ?.     The reason I ask is that I know that Koni produce black or red dampers in their Classic range. I want black for my late 73 GT6 being 80-1388 Front & 80-1389 Rear.  Rimmers tell me I can only get those ref. numbers in red but Demon Tweeks tell me they can get them in black.  Rimmers slightly cheaper and only down the A46 from me.   Are you able to shed any light ?         Many Thanks - Paul.