Lotus Elan

Cylinder Head Porting

PostPost by: johnjacobs » Fri Apr 08, 2005 9:54 pm

I have a Ford Kent (Crossflow) engine in my +2 which I am uprating, and am
trying to find a good place to
have the head ported.
Can anybody recommend a good (preferably cheap) shop in southern
California to have this work done?

I am also looking to have the flywheel lightened.... It has been suggested
that I should be able to shave it down
to 14lbs from 22lbs - Has anyone got experience of this, or any problems
that may result from shaving all that
metal off?

Anybody got a Twink engine for sale?

John

UK 1973 Elan +2S130, US 1973 Elan +2
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PostPost by: types26/36 » Sat Apr 09, 2005 9:52 am

--- In ***@***.***, ***@***.***e:
I have a Ford Kent (Crossflow) engine in my +2 which I am
uprating,

I am also looking to have the flywheel lightened....
should be able to shave it down to 14lbs from 22lbs - Has anyone

got experience of this, or any problems
that may result from shaving all that
metal off?

John,
I used to play about with Xflows a few years ago and dispite dire
warnings about shattering flywheels and cutting my legs off (it was
a Seven) I lightened the the flywheel to about 10-12lbs and nothing
happened, (but NO GUARANTEE'S) the car was used for road and
club/historic racing.
In standard form that is a big peice of metal on the end of a Xflow
crank!
Brian
64Elan/72Sprint/J.P.S.Europa/Birkin T.C.Seven
Brian
64 S2 Roadster
72 Sprint FHC
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PostPost by: "Rob Thornton" » Sat Apr 09, 2005 10:59 am

I just bought a bunch of X flow bits off a retired FF racer. Had a standard
looking flywheel and a fairly well lightened version in amongst the bits. On
the not too accurate (or so Mrs T claims) bathroom scales:

Standard 24lbs
Lightened 16lbs

Close to your figures John (assuming a 711M flywheel should weigh the same
as a TC one?)

Looks like a lot of metal has been removed and I wouldn't like to say how
much more to go before it lightens itself considerably... Guess there is
probably a bit left to go at.

Probably not really a good idea to 'suck it and see'

Cheers

Rob Thornton

S3 SE FHC
S2 7 TC

-----Original Message-----
From: Brian Goodison [mailto:***@***.***
Sent: 09 April 2005 10:52
To: ***@***.***
Subject: Re: [LotusElan.net] Cylinder Head Porting




--- In ***@***.***, ***@***.***e:
I have a Ford Kent (Crossflow) engine in my +2 which I am
uprating,

I am also looking to have the flywheel lightened....
should be able to shave it down to 14lbs from 22lbs - Has anyone

got experience of this, or any problems
that may result from shaving all that
metal off?

John,
I used to play about with Xflows a few years ago and dispite dire
warnings about shattering flywheels and cutting my legs off (it was
a Seven) I lightened the the flywheel to about 10-12lbs and nothing
happened, (but NO GUARANTEE'S) the car was used for road and
club/historic racing.
In standard form that is a big peice of metal on the end of a Xflow
crank!
Brian
64Elan/72Sprint/J.P.S.Europa/Birkin T.C.Seven











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PostPost by: john.p.clegg » Sat Apr 09, 2005 1:24 pm

Brian
So, what was the overall effect of losing this 10lbs

John


Brian Goodison <***@***.***> wrote:


--- In ***@***.***, ***@***.***e:
I have a Ford Kent (Crossflow) engine in my +2 which I am
uprating,

I am also looking to have the flywheel lightened....
should be able to shave it down to 14lbs from 22lbs - Has anyone

got experience of this, or any problems
that may result from shaving all that
metal off?

John,
I used to play about with Xflows a few years ago and dispite dire
warnings about shattering flywheels and cutting my legs off (it was
a Seven) I lightened the the flywheel to about 10-12lbs and nothing
happened, (but NO GUARANTEE'S) the car was used for road and
club/historic racing.
In standard form that is a big peice of metal on the end of a Xflow
crank!
Brian
64Elan/72Sprint/J.P.S.Europa/Birkin T.C.Seven
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PostPost by: types26/36 » Sat Apr 09, 2005 3:45 pm

--- In ***@***.***, JOHN CLEGG <[email protected]>
wrote:
Brian
So, what was the overall effect of losing this 10lbs

John,
Nothing dramatic,reved quicker got off the line fast and no issues
with
the idling, car was light 630 kg (which is heavy by todays standards)
so it didn't need a huge amount of torque.
The 1600 block,crank and flywheel were later fitted with a T.Cam head
and are still in the Seven although I no longer do competion and use
the car rarely as the car is still in S.Africa.
Brian
64Elan/72Sprint/J.P.S.Europa/Birkin T.C Seven
Brian
64 S2 Roadster
72 Sprint FHC
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