3200 tuning ...an SM definitive guide

[alfatwo]

The bar comes from http://www.15manufacturing.co.uk/

The standard bar is 22mm, the AC bar is 23mm and the bar Dave mentions he has on his and has been tested is the 25mm bar which they found worked best with the standard stiffness of the spring setup.

I paid £85 for my used AC bar, the 25mm ones are about £400+ VAT including mountings and brackets.

Thanks for sorting that out Phil...the orginal supplier seems to have gone to ground though, but I have a new man on the case!

Dave

 

[alfatwo]

Thanks guys, I'm liking the comments, keep them coming.. It's all adding to the archive

Brakes.....

Six months ago I contacted Willwood with regarding knocking up some inexpensive uprated front brake kits for the 3200GT useing all there stuff..

A couple of weeks ago they asked me for some drawings which I sent over..

I'll keep you posted!

Dave

 

[highlander]

Thanks guys, I'm liking the comments, keep them coming.. It's all adding to the archive

Brakes.....

Six months ago I contacted Willwood with regarding knocking up some inexpensive uprated front brake kits for the 3200GT useing all there stuff..

A couple of weeks ago they asked me for some drawings which I sent over..

I'll keep you posted!

Dave

any word on this yet Dave?

 

[alfatwo]

Sorry Greg, nothing back as yet.. they proberbly chucked the whole lot in the bin as there was no money in it..

But you never know!

Dave

 

[Topbomin]

15 Manufacturing

15M is alive and well and residing near Uttoxeter in Staffordshire. They are happy to supply 25mm anti roll bars. I should know as I have the first one on my car.

 

[alfatwo]

15M is alive and well and residing near Uttoxeter in Staffordshire. They are happy to supply 25mm anti roll bars. I should know as I have the first one on my car.

How does it feel. is it any good?

Dave

 

[Topbomin]

Regarding Exhaust Valve Timing, to what should they be set? Assuming one can alter it or does one need re-drilled drive wheels? I know that one tooth out when changing the belts caused the a piston to touch. Fortunately, I was turning it over by hand, so there was no danger of doing any damage.

 

[Topbomin]

Well as I had only just got the car and 15M is my brother and my son, I didn't really have much of a chance to compare the two, before they took it off me and fitted the 25mm bar. It feels terrific to me, but I am not sure if I am qualified to judge. They think it is a worthwhile improvement, or they would not have bothered to develop it. I am happy to be the recipient of their skill and knowledge. One corners pretty flat and can certainly chuck about through a series of S bends nearby.

 

[CatmanV2]

and 15M is my brother and my son,

This concerns me, somewhat

C

 

[alfatwo]

Well as I had only just got the car and 15M is my brother and my son, I didn't really have much of a chance to compare the two, before they took it off me and fitted the 25mm bar. It feels terrific to me, but I am not sure if I am qualified to judge. They think it is a worthwhile improvement, or they would not have bothered to develop it. I am happy to be the recipient of their skill and knowledge. One corners pretty flat and can certainly chuck about through a series of S bends nearby.[/QUOTE

I tried to get in touch last year regarding an SM order for a few bars... all I got back after six months of trying was the guy who actually makes them had shy'd off!

Not very good PR.....

Dave

 

[Topbomin]

The chap who makes the bars had a heart attack, but he is fit and healthy now. Just very busy.

 

[jluis]

Regarding Exhaust Valve Timing, to what should they be set? Assuming one can alter it or does one need re-drilled drive wheels? I know that one tooth out when changing the belts caused the a piston to touch. Fortunately, I was turning it over by hand, so there was no danger of doing any damage.

Are you sure your valve touched the piston?
When I installed my cambelt I did 2 full turns with one tooth off and had no issues.
These engines have low.compression ratios and 1 toothed should not cause interference.

 

[Almichie]

Are you sure your valve touched the piston?
When I installed my cambelt I did 2 full turns with one tooth off and had no issues.
These engines have low.compression ratios and 1 toothed should not cause interference.

Do not misunderstand compression ratio with an engine that will or will not have pistons and valves that touch if the cam timing chain/belt fails. Compressor ratio is just the relationship between the static and swept bore volume.

 

[mjheathcote]

There is more unswept volume so less likely for valve contact. More space in the combustion chamber at full compression.
I remember my little Lancia Y10 Turbo snapping it's cam belt, and it was impossible at any point in its cycle for a valve to make contact with the piston. An extreme example, it ran a 7:1 compression ratio.

 

[jluis]

There is more unswept volume so less likely for valve contact. More space in the combustion chamber at full compression.
I remember my little Lancia Y10 Turbo snapping it's cam belt, and it was impossible at any point in its cycle for a valve to make contact with the piston. An extreme example, it ran a 7:1 compression ratio.

This is what I meant.
I know its still an interference engine but there is more room before hiting the valves.
As an example, my father old TDI skipped 1 or 2 tooth's at highway speed enought for the engine to die and no longer start (due to the injection timing being off) and it did not hit any valve.
And this was a diesel engine with high compression ratio.

1 tooth off should be safe is most engines I think (from a piston/valve clearance point of view of course)

 

[Topbomin]

I can only speak from personal experience. When replacing my cam belt, I set it to the timing marks and then released the tensioner and it was one tooth out. On turning the engine by hand it came to a definite stop. When I set it to one tooth out and released the tensioner, it settled back to the timing mark and turned over without stopping. Now I have a high pitched scream from somewhere up front if I accelerate over two thousand five hundred revs. I have not yet had a chance to investigate this, but may have a split pipe or manifold gasket, I suppose.

 

[alfatwo]

I can only speak from personal experience. When replacing my cam belt, I set it to the timing marks and then released the tensioner and it was one tooth out. On turning the engine by hand it came to a definite stop. When I set it to one tooth out and released the tensioner, it settled back to the timing mark and turned over without stopping. Now I have a high pitched scream from somewhere up front if I accelerate over two thousand five hundred revs. I have not yet had a chance to investigate this, but may have a split pipe or manifold gasket, I suppose.

Check your PMs...Topbomin

Dave

 

[Fat Arnie]

Yes you need to get the cam timing a country mile out before there is a problem. On my Caterham, when it was on the rolling road we were swinging the cams +/- 10 degrees (they are on vernier pulleys of course) to find the sweet spot between power and torque. And it has far more aggressive mechanical cams than the hydraulic profile in the 4.2 and 4.7 Maserati engines. 1 tooth out is signoifcantly less, and with a softer cam profile the clearances are much bigger.