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Glitch
by BobtheTrain - 18/07/25 05:47 PM
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Forums34
Topics48,329
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Aug 24th, 2023
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Joined: Feb 2013
Posts: 446 Likes: 30
Learner Plates Off!
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OP
Learner Plates Off!
Joined: Feb 2013
Posts: 446 Likes: 30 |
For those that might be interested this is the spec of my new engine.  4.8-litre with forged pistons, top hat liners, larger P38-spec main bearings and big end bearings. Fully balanced. Big valve cylinder heads with 41.5mm intake valves and 35mm exhaust valves. Kent TVR885 camshaft Cloyes duplex timing gear. Shortened intake.. this combined with fully mapped fuel and ignition systems = 281bhp and over 300lbs/ft torque. The engine is extremely smooth, ticks over calmly, and pulls like a steam engine in any gear. I should have done this years ago. David Byrne (one happy bunny)
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Joined: Sep 2014
Posts: 2,272 Likes: 7
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2014
Posts: 2,272 Likes: 7 |
David
Nice spec there, you have gone for the capacity increase rather than a wilder camshaft which is probably right for a road car. The extra torque will be useful on the road for overtaking. That bay looks lovely , clean and tidy, and very shiny.
Just one question: I am not sure that a "shortened intake " is . Do you mean the shorter length trumpets in the plenum chamber, or is there some other mod?
Did you go for an uprated clutch to cope with the additional torque?
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Joined: Jul 2007
Posts: 26,746 Likes: 419
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,746 Likes: 419 |
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Joined: Feb 2013
Posts: 446 Likes: 30
Learner Plates Off!
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Learner Plates Off!
Joined: Feb 2013
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Andy, yes the clutch is uprated as is every thing else that I could think of, trumpets ,plenum and intake manifold all matched and ported, trumpets shortened.
I wanted an engine that was docile at tickover but pulled smoothly in any gear and went better than it looked.
David Byrne
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Joined: Apr 2014
Posts: 5,181 Likes: 2
Charter Member
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Charter Member
Joined: Apr 2014
Posts: 5,181 Likes: 2 |
That looks a good set up should be pleasure to drive on the road. Is the exhaust manifold still standard?
.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
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Joined: Feb 2013
Posts: 446 Likes: 30
Learner Plates Off!
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Learner Plates Off!
Joined: Feb 2013
Posts: 446 Likes: 30 |
Ray, I am on the lookout for a big bore exhaust manifold (librands)
David Byrne
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Joined: Oct 2013
Posts: 6,723 Likes: 2
Talk Morgan Sage
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Talk Morgan Sage
Joined: Oct 2013
Posts: 6,723 Likes: 2 |
David, that is a fantastic project and a stunning result. Cracking, in fact..! Top job, mate. 
Steve
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Joined: Oct 2013
Posts: 6,723 Likes: 2
Talk Morgan Sage
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Talk Morgan Sage
Joined: Oct 2013
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No pressure now then, Richard.. Devon deserves it.. 
Steve
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Joined: Nov 2015
Posts: 7,891 Likes: 241
Just barreling along Talk Morgan Guru
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Just barreling along Talk Morgan Guru
Joined: Nov 2015
Posts: 7,891 Likes: 241 |
Shiny, even the wiper motor looks 'polished & ported'  Nice attention to detail
Jon M
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Joined: Jul 2015
Posts: 956 Likes: 1
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jul 2015
Posts: 956 Likes: 1 |
That is going to go (very) well 
Honesty means doing it right, even when no one is looking!
2004 Roadster S1 3.0 V6 gone!
Mark
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