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minorv8
Jukka Harkola

(199 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Coil packs under the intake manifold
Posted by: minorv8
Date: March 22, 2020 01:23PM

I am (slowly) making a new plenum for my next engine. My current setup has the coil packs mounted on the firewall just behind the intake manifold. This is not perfect location, especially when I need to remove the engine. With the new intake there will be even less space. I have been thinking about mounting the coil packs underneath the plenum since there is plenty of space.

Now, the question is would there be any ill effects, e.g due to heat from the engine ? My engine room is crowded enough so finding a better location is a bit challenging.

I'll upload some photos once I have them reduced in proper size.


88v8
Ivor Duarte
Gloucestershire UK
(758 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: Coil packs under the intake manifold
Posted by: 88v8
Date: March 23, 2020 05:14AM

The two prime causes of coil failure... vibration, heat.
Custom cars, with a clean engine bay, presumably mount them in the cabin.

Use the space under the plenum for other purposes.
[www.wikihow.com]

Ivor


minorv8
Jukka Harkola

(199 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: Coil packs under the intake manifold
Posted by: minorv8
Date: March 23, 2020 10:01AM

Plenum_1.jpg

This is what my plenum will look like. I am still thinking which throttle body to fit. I currently have a 75 mm Mustang throttle body (chinese knockoff) but its linkage does not fit my plenum design. I need to get creative with the thermostat housing as well.

Coil pack.jpg

Here is a single coil pack stashed underneath the plenum for demostration purposes. This is a injection Mini coil, the Bosch coil packs I have are a touch smaller.

TVR AJP V8 have the coil packs in the lifter valley and in a very tight space. I doubt that my setup would be that bad. Factory LS coils are mounted to the valve covers and they see a fair amount of heat and vibration too.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5911 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Coil packs under the intake manifold
Posted by: BlownMGB-V8
Date: March 23, 2020 11:17AM

Pretty big plenum. Will that cause any problems?

You should be able to get by with putting the coils there if you allow some airflow through the area I would think.

Jim


Blown v8
Bryan Phipps

(63 posts)

Registered:
03/10/2013 04:52PM

Main British Car:


Re: Coil packs under the intake manifold
Posted by: Blown v8
Date: March 23, 2020 12:22PM

Iím thinking of putting mine on the block,under the headers, plenty of room,plenty of airflow, headers will be cam coated to help,
And itíll keep the leads short, and clean looking.


minorv8
Jukka Harkola

(199 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: Coil packs under the intake manifold
Posted by: minorv8
Date: March 24, 2020 04:21AM

Jim, there are trumpets inside the plenum but yes it is a bit big. The manifold runners kind of dictated the design. I hope that the engine size will help some (5+ litres).

Trumpets.jpg



Edited 1 time(s). Last edit at 03/24/2020 08:23AM by minorv8.


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