Im thinking about starting my chassis in a few weeks and im a bit concerned my jag aj6 might not fit 
.
I was thinking about extening the engine bay (chassis rails F1, F2 and G1, G2 in the old book and BR1, 2, 8 and 9 in the new book) but keeping the
front the same width.
Will i run into problems with strength or anything if i do this or has anyone else got any suggestions/advice. (using a different engine is NOT an
option 
)
Cheers
Hi
Draw out the book chassis on the build board.
Sit your engine/gearbox on the board.
Change to suit. That's what I did.
Paul G
That's going to be a difficult one to answer - firstly a lot depends on how far back you can set the engine (normally limited by bell housing
width) so the wider the car the better. Also using a 6 weight distribution becomes a factor so you want the motor far back.
If you can get the motor far enough back then you shouldn't need to lengthen the engine bay - with my 4AGe motor theres more than enough room for
2 more cylinders in front of the motor.
I think if you lengthen the bay G1 & G2 are the weak links and will need strengthening/supporting to carry the motor - also you should duplicate
member R on the other side
Have a look at papers published by Cymtrix on here at simple mods that significantly strengthen the chassis.
If you just lengthen those tubes then your suspension mounts will change position... not necessarily a good idea!
If you don't know what you're doing with suspension design I'd be careful with this... you don't want to trash the handling after
all!
HTH,
James
have you got any measurements for the engine and box ?
the volvo 6 cylinder fits in my chassis - it does come quite far foward tho , so i can measure it and see what we come up with .
quote:
Originally posted by Volvorsport
have you got any measurements for the engine and box ?
the volvo 6 cylinder fits in my chassis - it does come quite far foward tho , so i can measure it and see what we come up with .
Is the g/box a Getrag?
Paul G
quote:
Originally posted by 907
Is the g/box a Getrag?
Paul G
. Mmmm, That's a big lump.
I have a Getrag on a lotus engine.
My chassis is +4 wide. My foot wells are book so the extra 4" is in the g/box space.
By doing this the front end of the bell housing is level with the end of the foot well.
This leaves 35 1/2" ish to the front of the engine bay.
I can see now why you would want to make yours bigger.
If you don't follow this I'll take a photo.
Paul G
I do follow but any pics would be great. Nothing beats visual aids 
.
I would make the upper and lower rails of 50x25mm 16g ERW and make the H tubes 50mm shorter. A small weight increase, but a massive sag resistance
added to the chassis - needed with a big tubby engine
I like Mark's idea.
Perhaps bolt in triangulation after fitting the engine???
Pic below shows added 4" although I did it just to move the engine back for weight reasons.
Paul G
Rescued attachment lotus-pics-046-s.jpg
sundays trip to santa pod .
should be some pics of use
http://forums.turbobricks.com/showthread.php?t=94099
quote:
Originally posted by speedyxjs
(using a different engine is NOT an option
Cheers
My main concern would be weight, much as I love Jag 6s the AJ6 engine was a heavy bit of kit.
For starters I would think 4inch wider 4inch longer + 1 (or 2) inch deeper + Cymitrics mods.
quote:
Originally posted by Mark Allanson
I would make the upper and lower rails of 50x25mm 16g ERW and make the H tubes 50mm shorter. A small weight increase, but a massive sag resistance added to the chassis - needed with a big tubby engine
quote:
Originally posted by andyps
quote:
Originally posted by speedyxjs
(using a different engine is NOT an option
Cheers
Course it is an option - you should make it wider too and fit the Jag V12 in
quote:
Originally posted by britishtrident
quote:
Originally posted by andyps
quote:
Originally posted by speedyxjs
(using a different engine is NOT an option
Cheers
Course it is an option - you should make it wider too and fit the Jag V12 in
But real Jags have XK engines :-)