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dave the rave

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Re: Newbie

Post243110UTC FriUTC2018-10-05T22:25:47+00:00 2018...17.52

120bhp isn't too problematic from a 1275. They can confidently go to 1400cc. A bit more on a stroked Marina crank ( 84mm ).
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Rallyman

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Re: Newbie

Post243103UTC TueUTC2018-10-09T15:22:25+00:00 2018...17.52

Or would a triumph 1500 engine be a good idea?
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Re: Newbie

Post243106UTC TueUTC2018-10-09T18:49:25+00:00 2018...17.52

Definitely NOT.......a rubbish engine. A stretch too far from its 1300 predecessor. Years ago i spent 16+ years grinding crankshafts, ( have just started again in a company that actually MAKES them from bare EN40B steel bar ). The amount of Triumph 1500s that came in that had the thrust very badly worn, big-ends knocked out and, worse of all, were cracked around one or more of the fillet rad of the big-end, was surprising. With the latter they're scrap. Journals and the thrust can be welded. They don't like high revs either. As i said, rubbish engine. I would'nt beg one.
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Re: Newbie

Post243109UTC TueUTC2018-10-09T21:13:16+00:00 2018...17.52

Looks like I will have to find a marina 1300 engine then as 1275 are going for silly money
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dave the rave

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Re: Newbie

Post243109UTC TueUTC2018-10-09T21:51:04+00:00 2018...17.52

Bear in mind John, a Midget crank will fit straight into a Marina block. It'll need the Midget con-rods though. In my opinion, the only downside of the Marina blocks is the near upside down oil filter. Though remote filter kits are available.
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stoney13

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Re: Newbie

Post243112UTC FriUTC2018-10-12T12:50:11+00:00 2018...17.52

hi rally man and welcome,if you like the mx5, then why not fit the 1.6/1.8 mazda and box, as you must be aware being an owner of the mx5 you can go with single turbo twin turbo's or even a super charger as the 1.6/1.8 has forged pistons and a decent crank, all you would need to do if fitting a super charger is to fit double head gasket to lower compression ratio. the Mazda engine and box only weigh a few pounds more than the a series and box also on the up side you can get all the bits you need for around £200.00.
best of luck with the restoration ;)
EMA KAY - racing ( A40 s/w group & Wessex group)
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Re: Newbie

Post243103UTC FriUTC2018-10-12T15:39:19+00:00 2018...17.52

Hi
I would fit an mx5 engine but want to run in the historic class so will have to fit a period engine
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stoney13

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Re: Newbie

Post243108UTC SatUTC2018-10-13T20:06:46+00:00 2018...17.52

ha, you need a 998 cc for a sprite, or 1275 from the midget not that marina thing then ;)
EMA KAY - racing ( A40 s/w group & Wessex group)
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Re: Newbie

Post243008UTC ThuUTC2018-11-08T20:48:03+00:00 2018...17.52

I am nit finding any 1275 engines for sensible prices so am considering going the 1500 route .can these engines be made reliable?
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dave the rave

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Re: Newbie

Post243010UTC ThuUTC2018-11-08T22:06:22+00:00 2018...17.52

The only way I'd ever consider a Triumph 1500 would be with an EN40B Nitrided crank and decent conrods. The crank being the main contender. And modified to take two thrust washers each side.
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