|
2 members (bmgermany, Grumpy2),
202
guests, and
70
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
|
|
|
|
|
|
|
|
|
|
tow bar
by G Walker - 24/08/26 06:52 PM
|
|
|
Forums39
Topics49,836
Posts837,276
Members9,596
| |
Most Online1,063
Jun 14th, 2026
|
|
|
|
|
|
Joined: Apr 2015
Posts: 18
OP
New to Talk Morgan
|
Air Filter Box
The air filter of the roadster seems to collect relatively hot air, with an opening right above the gear box and in short distance to the manifold. Indeed the temperature is 30°C above ambient level with spirited driving in 3rd gear. The temperature in the area on the right side of the air filter is lower, especially after removing the part of the sealing underneath the last 4-5 louvres.
So I opened the box on the right side and closed the old opening. The incoming is now only 15°C above ambient temperature.
|
|
|
|
|
Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
|
|
Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
Which version of roadster do you have?
My 3.0 intake is from above the front of the radiator.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3) 
|
|
|
|
|
Joined: Apr 2015
Posts: 18
New to Talk Morgan
|
|
OP
New to Talk Morgan
Joined: Apr 2015
Posts: 18 |
That is better, of course, but very difficult with the 3.7, since the area to the radiator is packed!
|
|
|
|
|
Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
|
|
Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
Maybe worth fabricating a tube to take air from louvres in side of bonnet, you may get further temperature reduction?
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3)
|
|
|
|
|
Joined: Jul 2016
Posts: 537 Likes: 28
Talk Morgan Regular
|
|
Talk Morgan Regular
Joined: Jul 2016
Posts: 537 Likes: 28 |
Maybe worth fabricating a tube to take air from louvres in side of bonnet, you may get further temperature reduction? That's what I am thinking about for my 1993 +4. But I can't deside wether to install a K&N filter or to go for the (colder) side air intake.
Dirk
1993 Morgan +4 (Connaught Green)
2009 Mini Cooper D
2024 Mercedes GLC
1994 Ford Motorhome
|
|
|
|
|
Joined: Mar 2017
Posts: 2,273 Likes: 38
Talk Morgan Expert
|
|
Talk Morgan Expert
Joined: Mar 2017
Posts: 2,273 Likes: 38 |
Maybe worth fabricating a tube to take air from louvres in side of bonnet, you may get further temperature reduction? That's what I am thinking about for my 1993 +4. But I can't deside wether to install a K&N filter or to go for the (colder) side air intake. On my 4/4 Sigma engine I have the ITG air intake, it’s much better than the standard air box with the K&N filter  
Craig Jezz
|
|
|
|
|
Joined: Jul 2016
Posts: 537 Likes: 28
Talk Morgan Regular
|
|
Talk Morgan Regular
Joined: Jul 2016
Posts: 537 Likes: 28 |
Maybe worth fabricating a tube to take air from louvres in side of bonnet, you may get further temperature reduction? That's what I am thinking about for my 1993 +4. But I can't deside wether to install a K&N filter or to go for the (colder) side air intake. On my 4/4 Sigma engine I have the ITG air intake, it’s much better than the standard air box with the K&N filter Thank you for the pictures Craig. I don't have that clearance above my (Rover T16)engine. So I think I'll have to go for the side or top air intake. The ITG looks a good and solid solution. What's the average BHP gain? I 've already fitted the Librands 4 into 1 manifold.
|
|
|
|
|
Joined: Mar 2017
Posts: 2,273 Likes: 38
Talk Morgan Expert
|
|
Talk Morgan Expert
Joined: Mar 2017
Posts: 2,273 Likes: 38 |
Maybe worth fabricating a tube to take air from louvres in side of bonnet, you may get further temperature reduction? That's what I am thinking about for my 1993 +4. But I can't deside wether to install a K&N filter or to go for the (colder) side air intake. On my 4/4 Sigma engine I have the ITG air intake, it’s much better than the standard air box with the K&N filter Thank you for the pictures Craig. But I don't have that clearance above my (Rover T16)engine. So I think I'll have to go for the side or top air intake. The ITG looks a good and solid solution. What's the average BHP gain? I’m not sure of exact figures, but altogether with the ITG air induction kit, remap and Librands exhaust it must of added approx 30bhp...
Craig Jezz
|
|
|
|
|
Joined: Apr 2015
Posts: 18
New to Talk Morgan
|
|
OP
New to Talk Morgan
Joined: Apr 2015
Posts: 18 |
This is the reason, why I measured the temperature there as well. It is more or less as high as in the area below the filter. The air is exiting the louvres. This can be seen in the very helpful work of this Morganeer from Texas. There is low pressure. But the air goes into the last 4-5 louvres before the window. There is high pressure!
|
|
|
|
|
Joined: Dec 2009
Posts: 1,004 Likes: 31
Has a lot to Say!
|
|
Has a lot to Say!
Joined: Dec 2009
Posts: 1,004 Likes: 31 |
Stonehagen, a simply mod could be John Taylor’s bonnet extensions, they create an opening at the rear of the bonnet, with more airflow. I have them and I think it helps airflow to the itg filter I have on my 3.0 L roadster. Check http://www.morganhoods.com/id69.htmlCheers, Bert
2025 Plus Six - 1909
2009 Roadster
1983 4/4 4str
Board member Morgan Sports Car Club Holland ('21)
|
|
|
|
|
