QUESTION.
Hi, Im building a 1700cc twin cam based on a decked 711M block bored to 83.5mm.
The engine uses the 1600 cc crank, 2737E rods.
I need a spacer to fill the gap between the timing chest and the head.
The block deck has been machined down and the pistons are flush with the top of block at TDC.
The gap is 5/32 (~4.0mm) My head cc is 37.5/ per cyl
I see you supply various spaces and spacer gaskets in several thicknesses.
The smallest block spacers you advertize is 6mm, and the largest cork gasket is 3.3mm .
Do have anything that would work for my application?
Can you please advise?
I would also like to use one of your aluminium breather tubes, but not sure which one would work best.
Can you advise?
Thanks, J
Oceanside, California, USA,
ANSWER.
After running your engine specifications through our design spread sheet and allowing for a compressed head gasket thickness of 1.00mm (0.040") you will have a static compression ratio of approximately 10.4:1
Is this ratio suitable for the fuel you have available?
We only offer two spacers which are usually adequate for the usual compression height pistons that are commonly available (and the subsequent
block machining that is required)
If you require a custom height spacer then we can manufacture one to your specifications
You will need to dummy assemble your engine and measure the gap between the cylinder head flame face and the top of the timing chest to determine what
size cork gasket you require
For example, if the top of the timing chest is level with the top of the cylinder block and you install a head gasket that has a compressed thickness of 0.040" then you should install a timing chest cork gasket that is 0.060" thick.
This will allow 0.020" compression of the cork gasket so it seals but does not rupture
Please measure the bore size of the breather hole so we can supply the correct aluminium breather tube
Lotus Marques manufactures and usually stocks aluminium breather tubes to suit the Lotus twin cam engine.
Copyright © 2011 Lotus Marques
Hi, Im building a 1700cc twin cam based on a decked 711M block bored to 83.5mm.
The engine uses the 1600 cc crank, 2737E rods.
I need a spacer to fill the gap between the timing chest and the head.
The block deck has been machined down and the pistons are flush with the top of block at TDC.
The gap is 5/32 (~4.0mm) My head cc is 37.5/ per cyl
I see you supply various spaces and spacer gaskets in several thicknesses.
The smallest block spacers you advertize is 6mm, and the largest cork gasket is 3.3mm .
Do have anything that would work for my application?
Can you please advise?
I would also like to use one of your aluminium breather tubes, but not sure which one would work best.
Can you advise?
Thanks, J
Oceanside, California, USA,
ANSWER.
After running your engine specifications through our design spread sheet and allowing for a compressed head gasket thickness of 1.00mm (0.040") you will have a static compression ratio of approximately 10.4:1
Is this ratio suitable for the fuel you have available?
We only offer two spacers which are usually adequate for the usual compression height pistons that are commonly available (and the subsequent
block machining that is required)
If you require a custom height spacer then we can manufacture one to your specifications
You will need to dummy assemble your engine and measure the gap between the cylinder head flame face and the top of the timing chest to determine what
size cork gasket you require
For example, if the top of the timing chest is level with the top of the cylinder block and you install a head gasket that has a compressed thickness of 0.040" then you should install a timing chest cork gasket that is 0.060" thick.
This will allow 0.020" compression of the cork gasket so it seals but does not rupture
Please measure the bore size of the breather hole so we can supply the correct aluminium breather tube
Lotus Marques manufactures and usually stocks aluminium breather tubes to suit the Lotus twin cam engine.
Copyright © 2011 Lotus Marques
