Ax Gt Head Onto A Rallye? Will It Work?

[BDA-it 4 1 Cars]

Been offered a modified cylinder head from an AX GT with big valves and uprated springs, will thios bolt onto the TU engine in my K Reg Rallye?

 

 

Also did the AX GT have a twin SU set up? Is this something that is a good upgrade and easily done?

 

Thanks in advance!

 

[Henry Yorke 269 3 Cars]

The AX GT ran the same TU3S engine as the 205 XS with a twin choke Solex carb (32/34?). The Rallye had the iron blocked TU3 with single point injection IIRC. I assume it will physically fit, but not sure on how it would run with the singlepoint injection etc.

[welshpug 1,661]

rallye was still carb.

[BDA-it 4 1 Cars]

Yes its still a carb model!

 

With the head modds will need to up the carbs to twiin SUs is that what came on the AX GT??

[Daviewonder 533 3 Cars]

I doubt ax's came with twin su carbs?

[N3VRAM 12 1 Cars]

AX GT comes with either a single twin choke solex or a twin choke weber i believe? We're currently putting a manifold together for a twin SU setup on the rallye, will let you know the result in a couple of weeks time.

Edited September 2, 2013 by N3VRAM

[BDA-it 4 1 Cars]

There is no cam with the head will have to get one! Its only a road car dont want it to be to lary so maybe a saxo vtr cam will that work?

 

Bike Carbs??

[calvinhorse 870]

The vtr cam has bigger 'bearings' (part of cam that runs on head) so won't fit, you could possibly turn them down..

 

205 Rallye cams are direct fit but rare. Other than that it'll be a aftermarket one ~£200.

 

Not a lot of room for bike carbs, top engine mount really gets in the way

[trogboy 17]

The VTR cam will also be missing the lobe to run the mechanical fuel pump that you'll probably be using so I'd forget using it...

[calvinhorse 870]

The VTR cam will also be missing the lobe to run the mechanical fuel pump that you'll probably be using so I'd forget using it...

I knew when I saw your name you'd have picked up on something I'd missed and I knew it would be that! proper TU geeks!!

[N3VRAM 12 1 Cars]

Couldn't he just use the cam out of his rallye head (providing he has a TU3).

[calvinhorse 870]

Yes but not sure if it would be a downgrade?

 

Physically it would fit and drive the fuel pump

 

Ill have a look if I have one later (xs)

[N3VRAM 12 1 Cars]

Yeah it would be the rallye only makes 75hp and the XS/AX GT make 85hp (exactly the same engine).. i'm sure that the XS has a better cam than the UK rallye and that's part of what makes up the extra 10hp

[allye 530 3 Cars]

The head and cam shaft are different, also the carb is every so slightly different on the XS.

[trogboy 17]

I knew when I saw your name you'd have picked up on something I'd missed and I knew it would be that! proper TU geeks!!

Thanks...I think!