Close but no cigar!
Search found 151 matches
- Mon Jan 04, 2021 9:58 pm
- Forum: General Discussion
- Topic: Name that car
- Replies: 63
- Views: 5575
- Mon Jan 04, 2021 2:45 am
- Forum: General Discussion
- Topic: Name that car
- Replies: 63
- Views: 5575
- Tue Sep 15, 2020 1:56 am
- Forum: Parts For Sale
- Topic: Rusting A90 (541) wheel on ebay around £30
- Replies: 19
- Views: 3464
Re: Rusting A90 (541) wheel on ebay around £30
Photos of the Image wheel that was based on the wheel from eBay:
https://www.joc.org.uk/forum/viewtopic. ... 6&start=80" onclick="window.open(this.href);return false;
https://www.joc.org.uk/forum/viewtopic. ... 6&start=80" onclick="window.open(this.href);return false;
- Wed Aug 26, 2020 8:19 am
- Forum: Cars For Sale
- Topic: seeking SV8
- Replies: 9
- Views: 1323
Re: seeking SV8
https://www.joc.org.uk/forum/viewtopic.php?f=11&t=30678" onclick="window.open(this.href);return false;
- Fri Aug 21, 2020 10:51 pm
- Forum: V-8 Engine Tech
- Topic: Inlet/exhaust port matching - worth it?
- Replies: 25
- Views: 3533
Re: Inlet/exhaust port matching - worth it?
Probably the most common gasket compressed thickness would be 0.040". So it is straight forward to go with zero deck height (pistons flush with deck) and 0.040" head gaskets, which gives a good quench height of 0.040". You could use the same approach with any gasket between 0.039 to 0...
- Fri Aug 21, 2020 11:25 am
- Forum: V-8 Engine Tech
- Topic: Inlet/exhaust port matching - worth it?
- Replies: 25
- Views: 3533
Re: Inlet/exhaust port matching - worth it?
I'd say 0.040" to 0.045" is a good range for quench height.
- Fri Aug 21, 2020 2:24 am
- Forum: V-8 Engine Tech
- Topic: Inlet/exhaust port matching - worth it?
- Replies: 25
- Views: 3533
Re: Inlet/exhaust port matching - worth it?
If you are going to skim the block to square it up, then you might as well ensure that the quench height is optimised. - It will increase the compression ratio which will help with energy efficiency and power as well as giving you more options when it comes to camshaft selection - It will improve qu...
- Fri Aug 21, 2020 1:26 am
- Forum: V-8 Engine Tech
- Topic: Inlet/exhaust port matching - worth it?
- Replies: 25
- Views: 3533
Re: Inlet/exhaust port matching - worth it?
You used to be able too buy some templates for the ideal port shape. Some one I know bought a set of heads that had already been ported and he reckoned the engine was a lot more free revving. If you are after a little more efficiency from your engine getting the compression close to 10 to 1 is a go...
- Thu Aug 20, 2020 1:22 am
- Forum: V-8 Engine Tech
- Topic: Inlet/exhaust port matching - worth it?
- Replies: 25
- Views: 3533
Re: Inlet/exhaust port matching - worth it?
An extreme example of how port mismatches may not make much of a difference relates to the Big Block Chevrolet (BBC). A square port inlet manifold has been proven to work very well on an oval port head. See the image to get an idea of the degree of port mismatch. http://www.usmuscle.com.au/Forum/att...
- Wed Aug 19, 2020 7:05 am
- Forum: V-8 Engine Tech
- Topic: Inlet/exhaust port matching - worth it?
- Replies: 25
- Views: 3533
Re: Inlet/exhaust port matching - worth it?
Pocket porting is well and truly worth the effort, but port matching commonly yields little to no improvement.
- Mon Aug 17, 2020 2:39 am
- Forum: General Discussion
- Topic: Name That Car
- Replies: 1093
- Views: 158735
- Wed Jul 08, 2020 10:25 pm
- Forum: General Discussion
- Topic: E10 Petrol
- Replies: 16
- Views: 2987
Re: E10 Petrol
Why would you need to run 98 RON unless you have a modified engine? I have run my Mk. 3 on NZ 91 RON for 16 years with no issues and I have a slightly increased comp. ratio (9.2:1 if I remember right!). I was actually thinking of the B motors that had a 10:1 compression ratio vs 8.2:1 for the RB mo...
- Tue Jul 07, 2020 11:13 pm
- Forum: General Discussion
- Topic: E10 Petrol
- Replies: 16
- Views: 2987
Re: E10 Petrol
That makes more sense.
Wouldn't most of you use 98 RON anyway? It won't be good if even the 98 RON has 5% ethanol in it.
Wouldn't most of you use 98 RON anyway? It won't be good if even the 98 RON has 5% ethanol in it.
- Tue Jul 07, 2020 9:39 pm
- Forum: General Discussion
- Topic: E10 Petrol
- Replies: 16
- Views: 2987
Re: E10 Petrol
Surely nobody runs a Jensen on 91 RON fuel?
- Tue Jul 07, 2020 2:21 am
- Forum: Members' Cars
- Topic: JLO 78K 128/4382
- Replies: 58
- Views: 11216
Re: JLO 78K 128/4382
A cool video showing the difference viscosity makes:
https://www.tec-science.com/wp-content/ ... cosity.mp4
https://www.tec-science.com/wp-content/ ... cosity.mp4