Essex on LPG and Throttle Bodies and a turbo

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MikeyBikey
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Essex on LPG and Throttle Bodies and a turbo

Post by MikeyBikey » Tue Oct 17, 2017 9:12 pm

Bit of Fun.


Inlet manifold machined to have a true face.

Plate machined to bolt on and have two holes to fit

Omega 3.2 V6 throttle bodies
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two 35mm venturii mixers
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OMVL lpg reducer turned up to the maximum
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just got to finalise trumpets and air intake system
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ps the cans are not real trumpets, just gauging length.

She starts and runs well.

just a lot of fettling and tuning with many variables but with the wide band sensor and gauge its enjoyable

Also put on new dizzy, the old one threw a bit too much advance too quickly , i think.
Last edited by MikeyBikey on Sun Nov 19, 2017 10:46 am, edited 5 times in total.


Owner of a fantastic se5a (nee 5 speed) that's a bit quick (well, feels like it is!!) and now running on lpg
viewtopic.php?f=20&t=8036
And is now going sprinting viewtopic.php?f=20&t=24376

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Essex on LPG and Throttle Bodies

Post by efi_sprintgte » Tue Oct 17, 2017 9:16 pm

This looks interesting!



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Essex on LPG and Throttle Bodies

Post by MikeyBikey » Tue Oct 17, 2017 9:39 pm

What's the minimum gap between the top of a trumpet and the airbox top. 1.5 x trumpet internal diameter ??


Owner of a fantastic se5a (nee 5 speed) that's a bit quick (well, feels like it is!!) and now running on lpg
viewtopic.php?f=20&t=8036
And is now going sprinting viewtopic.php?f=20&t=24376

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Essex on LPG and Throttle Bodies

Post by efi_sprintgte » Tue Oct 17, 2017 9:53 pm

MikeyBikey wrote:
Tue Oct 17, 2017 9:39 pm
What's the minimum gap between the top of a trumpet and the airbox top. 1.5 x trumpet internal diameter ??

Yes that's a safe bet.

Lots of research (by people a lot more clever then me) has shown a "stub stack" style of fully radiused trumpet to flow the best.



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Essex on LPG and Throttle Bodies

Post by MikeyBikey » Tue Oct 17, 2017 10:24 pm

Stub stack... :?: :?


Owner of a fantastic se5a (nee 5 speed) that's a bit quick (well, feels like it is!!) and now running on lpg
viewtopic.php?f=20&t=8036
And is now going sprinting viewtopic.php?f=20&t=24376

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Essex on LPG and Throttle Bodies

Post by efi_sprintgte » Wed Oct 18, 2017 6:05 am

IMG_4473.JPG
Stub stack
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Essex on LPG and Throttle Bodies

Post by MikeyBikey » Wed Oct 18, 2017 7:12 am



Owner of a fantastic se5a (nee 5 speed) that's a bit quick (well, feels like it is!!) and now running on lpg
viewtopic.php?f=20&t=8036
And is now going sprinting viewtopic.php?f=20&t=24376

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Essex on LPG and Throttle Bodies

Post by Roger Pennington » Wed Oct 18, 2017 12:36 pm

He said "flow" not "flower"....... :lol:


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Essex on LPG and Throttle Bodies

Post by efi_sprintgte » Wed Oct 18, 2017 12:43 pm

:D



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Essex on LPG and Throttle Bodies

Post by lozzzzzz » Wed Oct 18, 2017 9:13 pm

I love it!!!!!!! Its so simple and puts the two chokes in a much better orientation for the inlet maifold giving each cyinder a better share of fuel and air. I hope oyou get it running sweet right through the range.

I really want to have a go in that car. Its been years since I've seen it


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Essex on LPG and Throttle Bodies

Post by landowner » Sun Oct 22, 2017 9:28 am

MikeyBikey wrote:
Tue Oct 17, 2017 9:39 pm
What's the minimum gap between the top of a trumpet and the airbox top. 1.5 x trumpet internal diameter ??
I would say as much as possible, I don't think you will gain much torque wise by having trumpets, stub stacks will be enough and give the inlet a nice radius for drawing lots of air in. I ran a V8 on LPG (Rover on SU's) and found I needed a lot more ignition advance. Was running on fork lift truck gas but its the same stuff I think.
Your old dizzy may have had a broken of loose spring but new is always better then you know it's right, good luck with it :D


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Essex on LPG and Throttle Bodies

Post by Archibald Tyre » Sun Oct 22, 2017 10:20 am

its all propane

LOVE the bean cans - leave them there :lol:



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Essex on LPG and Throttle Bodies - higher compression

Post by MikeyBikey » Tue Oct 24, 2017 2:38 pm

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Ok lots of fettling and finally getting there.

Turns out I had too much throttle so the butterflies were going over the 90 degrees

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And the height was a challenge so I've reversed the mixers and fettled them into the tb, and added trumpets.

All was ok. Not too impressed with performance until I wound back the timing. Flipping heck. Much much better


Owner of a fantastic se5a (nee 5 speed) that's a bit quick (well, feels like it is!!) and now running on lpg
viewtopic.php?f=20&t=8036
And is now going sprinting viewtopic.php?f=20&t=24376

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Essex on LPG and Throttle Bodies - higher compression

Post by MikeyBikey » Tue Oct 24, 2017 2:41 pm

So read online need 40 degrees of advance.

Also what is the easiest way of increasing compression ratio on the Essex. I've already got the slightly higher compression pistons 9.8 iirc albeit still standard supply


Owner of a fantastic se5a (nee 5 speed) that's a bit quick (well, feels like it is!!) and now running on lpg
viewtopic.php?f=20&t=8036
And is now going sprinting viewtopic.php?f=20&t=24376

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Essex on LPG and Throttle Bodies - higher compression

Post by philhoward » Tue Oct 24, 2017 2:51 pm

Ballpark figure is lpg needs at least 10 degrees more advance than petrol but it’s a bit engine dependant.

I think pistons are probably the best way to go - I think you used to get Powermax ones quoted at 10.5:1 and 11:1?


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