Difference of Elan and Cortina manifolds/headers

PostPost by: Quart Meg Miles » Tue Sep 24, 2019 9:39 pm

I bought a second hand 4-2-1 manifold from a forum member but when fitting it the exit pipes seemed to point slightly downwards and I to strain all the pipes into the Y-piece to align it with the tail pipe. I believe this tension is making the whole car noisy and vibrate as was the case with a harsh FHC someone once asked me to assess.

I seem to remember seeing, but can't find, an item saying that the Lotus Cortina manifold was slightly different so do I have a manifold from a Cortina?
Meg

26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Quart Meg Miles
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1170
Joined: 03 Oct 2012

PostPost by: rgh0 » Wed Sep 25, 2019 12:17 pm

The Cortina exhaust manifolds I have seen are very difference to an Elan's due to the larger gap between engine and body on a Cortina. This enable the 4 pipes to come out and flow back and down with more gentle bends than required by the tight gap between the block and sub frame on an Elan.

A Cortina exhaust would not fit in an Elan.

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 8414
Joined: 22 Sep 2003

PostPost by: Quart Meg Miles » Wed Sep 25, 2019 4:21 pm

Thanks as always, Rohan, that seems rather obvious now!

I wonder if it was the Europa TC that was different.
Meg

26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Quart Meg Miles
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1170
Joined: 03 Oct 2012

PostPost by: Quart Meg Miles » Wed Sep 30, 2020 3:07 pm

The reason for the exhaust droop has become clear: the gearbox mount has perished and so the whole power plant is tilted!

St Wilkins will have a replacement in a month (it's the early type) but meanwhile I've stuffed in some old bits of rubber to hold the gearbox off the chassis where it was graunching.
Meg

26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Quart Meg Miles
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1170
Joined: 03 Oct 2012

PostPost by: rgh0 » Thu Oct 01, 2020 10:28 am

Quart Meg Miles wrote:The reason for the exhaust droop has become clear: the gearbox mount has perished and so the whole power plant is tilted!

St Wilkins will have a replacement in a month (it's the early type) but meanwhile I've stuffed in some old bits of rubber to hold the gearbox off the chassis where it was graunching.



If I recall correctly TTR do a conversion bracket to fit the later style gear box support to the early arrangement.

For what its worth

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 8414
Joined: 22 Sep 2003

PostPost by: Quart Meg Miles » Thu Oct 01, 2020 8:25 pm

rgh0 wrote:If I recall correctly TTR do a conversion bracket to fit the later style gear box support to the early arrangement.

For what its worth

cheers
Rohan

As the last one must have been fitted in 1990 I guess I'll not bother; but thanks.
Meg

26/4088 1965 S1½ Old and scruffy but in perfect working order; the car too.
________________Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Quart Meg Miles
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1170
Joined: 03 Oct 2012

Total Online:

Users browsing this forum: MACCA.GLM and 49 guests