Search found 1435 matches

by DEVONMAN
Sat Oct 28, 2023 12:00 pm
Forum: Electrical & Ignition Area
Topic: Baffling ignition problem
Replies: 3
Views: 4416

Re: Baffling ignition problem

Have you checked the condition of the camshaft cog?
by DEVONMAN
Thu Jun 01, 2023 10:52 am
Forum: Engines Area
Topic: V8 Plumbing
Replies: 2
Views: 1311

Re: V8 Plumbing

A is a vacuum connection for a brake servo if you have one. B Return water from the heater. C Fuel into carb. D Connects to stub on thermostat housing. (Water bypass) Spade terminal next to thermostat housing is connected to the temperature gauge. D rear is the water feed to the heater. Rear of carb...
by DEVONMAN
Sun Oct 23, 2022 10:01 am
Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
Topic: Valve stem oil seals
Replies: 5
Views: 2046

Re: Valve stem oil seals

You can get oil seals that fit your guides. Search ebay UKC7012L
by DEVONMAN
Fri Jun 11, 2021 6:18 pm
Forum: Cooling Area
Topic: MGB V8 EFI Cooling Problem
Replies: 29
Views: 10263

Re: MGB V8 EFI Cooling Problem

Looking at your layout, I suggest that you put a plain full seal cap at the top hose and not a pressure type. This will allow coolant and any air to flow up to the header tank from the onset of temperature rise. Just to add, I've heard that MGBs run cooler in the summer when the heater is off becaus...
by DEVONMAN
Sat Feb 13, 2021 11:47 am
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

MSD stuff isn't the most reliable. I've had a few of their boxes fail over the years. Although with modern coils....a lot of that stuff is pretty much defunct although a lot still like to use it. Most decent modern coils will have no problems at all with say 2-300hp per litre. That said, if it's a ...
by DEVONMAN
Sat Feb 13, 2021 10:03 am
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

stevieturbo wrote:
Fri Feb 12, 2021 8:21 pm
MSD stuff isn't the most reliable.

I've had a few of their boxes fail over the years.
(quote.)


Agreed. Consequently I have a plug in loop cable to bypass the msd if necessary.
by DEVONMAN
Sat Feb 13, 2021 9:59 am
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

Interesting - never heard of that before. Any real difference in practice? I'm already running 0.035 with EDIS. Last time I checked. :D One disadvantage with EDIS is it decides the dwell for the coils. Which according to the MS boys is important. The ability to set it for best results. I've got LS1...
by DEVONMAN
Fri Feb 12, 2021 2:28 pm
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

Not quite clear what you mean? You're using EDIS and also a 4 channel MSD box? Can you describe it? The 4 outputs from the EDIS8 go into the MSD DIS-4 box which sends 4 stronger signal to the coilpacks. The MSD version of the normal Ford coils can be used to further enhance the spark and allow much...
by DEVONMAN
Fri Feb 12, 2021 12:12 pm
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

[ Dave EFi wrote. If you already have an injection RV8 and are considering a mapped ignition system, I'd think of the future. Going for an ignition only system like MegaJolt will be fine - but using an MS etc in ignition only mode would reduce the amount of wiring etc if you later decide to do fuel ...
by DEVONMAN
Tue Feb 09, 2021 2:23 pm
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

I agree that the advance shouldn't stop suddenly at a given RPM and ideally should be adjusted to suit cylinder filling and mixture density, but given the limitation of a distributor, I suggest the ideal advance can only be achieved electronically and or after tests. The principle I put forward was...
by DEVONMAN
Tue Feb 09, 2021 11:15 am
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

Coming back to the original question, the advance does not need to continue to rise with revs above a certain point because the mixture in the cylinder at high revs has a greater density (Cylinders rammed full) and this burns quicker than a less dense mixture. At light load cruise the mixture is le...
by DEVONMAN
Mon Feb 08, 2021 11:39 am
Forum: Electrical & Ignition Area
Topic: Question on ignition advance for increasing RPM
Replies: 48
Views: 21632

Re: Question on ignition advance for increasing RPM

Coming back to the original question, the advance does not need to continue to rise with revs above a certain point because the mixture in the cylinder at high revs has a greater density (Cylinders rammed full) and this burns quicker than a less dense mixture. At light load cruise the mixture is les...
by DEVONMAN
Mon Feb 08, 2021 10:22 am
Forum: Engines Area
Topic: Rover oil pressure relief valve spring.
Replies: 4
Views: 3079

Re: Rover oil pressure relief valve spring.

Blimey, you have dug this up from the past. The installed effectiveness of the relief valve spring depends on the preload due to the compression of the spring as it is installed. True, a shorter spring is stiffer but allowance has to be made for the initial installed force on the valve piston.
by DEVONMAN
Wed Apr 01, 2020 3:27 pm
Forum: Engines Area
Topic: Rebuild of a RV8 4.6 instead of the 3.9
Replies: 9
Views: 3827

Re: Rebuild of a RV8 4.6 instead of the 3.9

It is possible to get double sided V belts which with a v pulley on the pump may work. Don't know what sort of length you need. By the way, flipping the impellor on the pump will not change the flow direction but will just be less efficient.

Go to advanced search