chassis mods

[chassyman]

it's not original i know,but it's a gratura with tr6 diff mounts and ford engine/gearbox mounts. i was told the guy is fitting an all steel 1700 screemer. i love the induction roar of twin 45's.best regards kt.

[smithy63]

Very nice, I like shiny things like that Bit of skill required there I think.

[THREEFISHORANGE]

Hello KT. Been trying to get hold of you through email regarding chassis's, would you please email back off my profile.Cheers Chris

[sc motorsport]

... looks like my chassis. Everything stated is correct except the 1700 Ford engine. I'm planning to use a Cosworth Mk5 (1340cc) in my Grantura.

Regards, Stephan

[alfa-chris]

Hey Stephan,

was für einen Grantura machst du denn gerade?
Hatte überlegt meinem einen Cosworth MK9 zu verpassen.

[Slow M]

alfa-chris said:

Hey Stephan,

was für einen Grantura machst du denn gerade?
Hatte überlegt meinem einen Cosworth MK9 zu verpassen.

Chris,

Cosworth MK9 schafft nur 110PS. Kaum genug.
Cosworth MK9 only gets to 110HP. Hardly enough.

B

[sc motorsport]

I'm rebuilding a Grantura Mk3, the Chassis as you see in the picture above is a wishbone chassis not a trailing arm one.

[chassyman]

hi stephan, thats what i like, information direct from the source of the person doing the job. hope it all goes well and maybe keep everybody up to date with your project. best regards kt

[sc motorsport]

Keith, thanks for your comment. I'll try to post an update from time to time, please feel free to visit out homepage www.sc-motorsport.com for more information about our projects. Regards, Stephan

[thegamekeeper]

sc motorsport said:

I'm rebuilding a Grantura Mk3, the Chassis as you see in the picture above is a wishbone chassis not a trailing arm one.

Its very nice but that is not a Grantura Mk3 chassis, its an 1800S chassis, VERY different.

[alfa-chris]

sc motorsport said:

the Chassis as you see in the picture above is a wishbone chassis not a trailing arm one.

of course it is, my chassis looks totally different, except for the outrigger.

today mine will be off for sandblasting, hope there will be some tubes left afterwards

[alfa-chris]

Slow M said:

Chris,

Cosworth MK9 schafft nur 110PS. Kaum genug.
Cosworth MK9 only gets to 110HP. Hardly enough.

B

according to my Cossie-Documents the MK9-engine produces around 120bhp somewhere between 6000 and 6500 rpm and some 150 lb-ft of torque on twin-weber.
Should be enough for a plastic-car.

Otherwise I will have a chat with an eingine-specialist in Leverkusen, called Kirsten Motorentechnik, about rebuilding the engine. Not quite sure if I should do the rebuild in germany or the UK. Wrote emails to throbnozzle, he came up with the mk9, and Phil Jones and they both showed some interesting opportunities for the engine.

[Granturas]

What or where is the difference between a MKIII and an 1800S chssis?

[Slow M]

alfa-chris said:

...today mine will be off for sandblasting, hope there will be some tubes left afterwards

Good luck, sure it'll do fine.

alfa-chris said:

... 120bhp ... and some 150 lb-ft ... Should be enough for a plastic-car...

This may sound like a bit of an existential question*. Can you really ever have enough?

B

• ...but it's just about common greed.

Edited by Slow M on Tuesday 9th August 16:22

[alfa-chris]

Slow M said:

Can you really ever have enough?

B

• ...but it's just about common greed.

of course, the more power the better! But I would like to keep my driving license so better not too much horses

The good thing with classic cars is, they even make a lot of fun driving "normal" speed which is within payable tolerances in germany.
Went to the Classic Days at Schloss Dyck the last weekend with my fathers 1933 Citroen Coupé, it even makes a lot of fun with just some 32 bhp and a topspeed of 90

[thegamekeeper]

Granturas said:

What or where is the difference between a MKIII and an 1800S chassis?

The 1800S chassis is approximately 6" wider at the rear of the engine bay and the upper cross member immediately in front of engine is much lower, both to accomodate the V8 engine of the Griffith 400. Also Grantura MK3,s have only 2 rear shock absorber/spring units, 1800S has provision for 4. There are other minor details but those differences are significant.

Well used Grantura Mk3 with twin 45,s and "original" engine

[Granturas]

As far as I know are the chassis's of the MKIII after the Griffith 200 invention up to the Vixen SI the same. There might be differences at the diff mounting, engine mounting etc. but this is logical. An MGB engine and a Ford v8, and a Ford 1600 engine have different mountings, as well as their exhaust systems. I wonder how many early MKIII chassis where built up to the Griffith 200 production. Btw. this applies also for the MKIII body, they also have little changes during their period of building.

Klaus Witzig

P.S.
Who ever finds my othography mistakes, may keep them. (quotation, Chris Willi)

[chassyman]

the gamekeeper is quite right, the chassis before the 1800s had upper main rails that had just the one kink (set) in them which causes restriction to the twin weber carbs. it also had low down on the bottom rail cotton reel type engine mountings which were not up to the racing job, so most racers wany the double kink (set) type chassis. i like the photo that you put on there, but i see it's a crossflow 8 port head and that's not standard on a mgb engine. all the same, it's a lovely job and respect to you. best regards kt

[sc motorsport]

Maybe I should give my engine choise a second thought and go for a Ford V8 instead of the Cossy Mk5 as the chassis has been build to accept the bigger engine anyway ...

[thegamekeeper]

sc motorsport said:

Maybe I should give my engine choise a second thought and go for a Ford V8 instead of the Cossy Mk5 as the chassis has been build to accept the bigger engine anyway ...

I just happen to have a fully rebuilt 1965 289 Hi-Po in my garage with alloy bellhousing and Super T10 gearbox with all ancillaries,new 600cfm Holley and a thick wedge of receipts. Fill the space nicely.