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Author Topic: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?  (Read 354 times)

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Offline Jon Olds

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New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« on: January 09, 2015, 05:54:31 pm »
Well the bloack has just come back from a fresh +0.25mm bore/hone to suit the new flat top Mahle's forged pistons. Build will be 12.5:1 comp. The crank and rods are std EG. Bottom end is all new but fundamentally std with windage tray and baffled sump. Head is a chambered Judd/Longman 40:35 semi downdraft design, ex Button or a sister car. Ported to match an inlet manifold that's nearly all port mating to 48DCOE's. Cam is a reground race profile of unknown parentage, but belongs to the engine. Valves must be longer, as the solid lifters have no centre stud, so there should be plenty of valve spring travel. Vernier obviously. Dizzy is a clockwork EG with more swing on the timing. Exhaust is a side exit large bore 4:1 with four separate inlet pipes. It will be modified to rear exit.
All these bits and pieces are going to be combined into an engine, as I'm sick of seeing them on a shelf here.
It may go into my mk1, I'm not sure really. If I'm honest I don't need another race engine at the moment, but I'm curious just how much power a full race 1600VW had 'back in the day'
Do you want to be kept up to date?
Jon
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Offline Tim Moll

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #1 on: January 09, 2015, 11:41:38 pm »
Hell yeah of course we do....or at least I do!  I had a 1.6 EG back in the day and loved the way they revved  ;D
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Offline Jon Olds

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #2 on: January 10, 2015, 12:25:08 am »
It potentially could be an EG, as I have a full race flat EG head also. I could chamber the pistons and fit the EG head. But, I am dying to see if this semi downdraft head works.
So its going together as a chambered lump. If it has no power, I can convert it!
Jon
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Offline GEL

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #3 on: January 10, 2015, 06:36:36 am »
Yes please Jon ... keep it coming  ;D

PS ... what do you get up to in your spare time, sleeping ?  ;)  :D
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Offline Jon Olds

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #4 on: January 10, 2015, 12:19:58 pm »
I have Christmas day off, the rest of my time is 'allocated'
Jon
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Offline JMR

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #5 on: January 10, 2015, 11:10:24 pm »
I think I should dyno it here Jon! ;)
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Offline Jon Olds

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #6 on: January 11, 2015, 08:43:53 am »
We need a Tardis like machine to bring Sunderland closer to Cornwall. I have bought two cars from down there in the last year, and it takes forever to get there with  a trailer on the back
Other than that the job's yours.
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Offline JMR

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #7 on: January 11, 2015, 07:56:40 pm »
Engine...pallet...rachet straps... ;)
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Offline Jon Olds

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #8 on: January 11, 2015, 08:57:45 pm »
Possible. Engine dyno then. Let's get it built first and take it from there...
Jon
Block arrived back yesterday. Some nice red paint....Will try and pic document as we go
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Offline Jon Olds

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #9 on: April 27, 2020, 08:52:36 am »
Not been on here for a long long time.
Anyway, that promised update, somewhat late..
Like everyone, at home tinkering..
The race EG got finished, built and is in my very light, very old competition car.
Spec: went with the longman flat head, near flat piston tops, GS6, 45 DCOE's and 4:1
Surprisingly flat torque curve at the top end, sounds good
Only 150hp ish though, slightly disappointing.
Used it a Croft British championship sprint, but it got rained off, easter couple, few years ago.
The car is ready to sprint, rallycross, autocross (configuration tweeked to suit obviously..) but
a real lack of clubman events around these days.
Being 1600 doesn't really fit 2020 classes any more.
Anyway, two other additional reasons for posting;
1. Need a 020 JMR gear linkage for the new project
2. New project is another race/rally/track/etc mk1, maybe post a new thread, if anybodies interested..
Jon
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Offline wdb2021

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Re: New engine build: 1588cc Flat tops chambered, Judd Longman 48's..interesting?
« Reply #10 on: April 21, 2021, 04:54:00 am »
Post it again, I read and liked it. Workable, useful information.
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