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(Post Link) post #1 of 17 Old 10-06-10 Thread Starter
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difference between jts and twinspark

Hi Guys,Im interested in an 03 2.0 litre petrol jts 156 with a blown engine.What do i need to do to get an earlier twinspark to fit it into the car, is it simply manifolds etc or is the engine entirely different.Any help or info be appreciated.
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Forget it.!!Everything is different.
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Originally Posted by ALFA TUNER View Post
Forget it.!!Everything is different.
The crankshaft's the same.
(I think...!)
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i thought the whole bottom end was the same, but you know what thought did
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Originally Posted by Alfa-Red View Post
i thought the whole bottom end was the same, but you know what thought did
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Originally Posted by iainfm View Post
The crankshaft's the same.
(I think...!)
He is asking about swapping complete engines,ie TS for JTS,so why are you two genlemen talking about similarity of bottom.......ends?


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Hi Guys,Im interested in an 03 2.0 litre petrol jts 156 with a blown engine.What do i need to do to get an earlier twinspark to fit it into the car, is it simply manifolds etc or is the engine entirely different.Any help or info be appreciated
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(Post Link) post #6 of 17 Old 10-06-10 Thread Starter
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So the jts is not a reworked twinspark then.
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Originally Posted by seymour beaver View Post
So the jts is not a reworked twinspark then.
Probably best described as an evolution of it...

JTS engine - Wikipedia, the free encyclopedia
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Quote:
Originally Posted by ALFA TUNER View Post
He is asking about swapping complete engines,ie TS for JTS,so why are you two genlemen talking about similarity of bottom.......ends?
i know that and its the other way around, and you said EVERYTHING is different but anyway nerner:

i take it the exhaust, manifolds, engine mounts, wiring etc are too different to make the swap possible?
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The real changes occur the the higher you go, bottom ends are the same as you move up the head looks similar but is differnt, inlet manifold is very different, exhaust is different all the way through, ECU and most other loom is different. Also the internal wiring loom and systems are different. Its not a straight swap given enough time and money you could do it but not worth it..

So as Alfatuner said it totally different in the sense that without a huge amount of effort and money it not do-able
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(Post Link) post #10 of 17 Old 10-06-10 Thread Starter
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Now im getting somewhere! If i have a block from a twinspark will all else fit on it.Ive got numerous bottom ends this is not a project ive done before hence my request.Some replies to my posting are taking the mickey if it makes you feel better ok.My thoughts are the forums are to help other users and give advice... one upmanship may make some feel better but hopefully thats not what these forums are all about.

Last edited by seymour beaver; 10-06-10 at 21:42.
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What does 'blown' mean in the original query? If it's a bottom-end problem you're in with a chance!
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Quote:
Originally Posted by seymour beaver View Post
Now im getting somewhere! If i have a block from a twinspark will all else fit on it.Ive got numerous bottom ends this is not a project ive done before hence my request.Some replies to my posting are taking the mickey if it makes you feel better ok.My thoughts are the forums are to help other users and give advice... one upmanship may make some feel better but hopefully thats not what these forums are all about.
i wasnt taking the mickey

i thought it was just the direct injection head that was different and the wiring. i aint 1 up on anybody, especially Ian and Gus.

also thats not my style, thank you very much.

Last edited by Alfa-Red; 10-06-10 at 21:57.
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If the bottom end has gone yes you can swap all the JTS onto a TS block you may need to change the pistons as both engines have cutouts for the valves but the JTS has also a cut out for the injector...
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(Post Link) post #14 of 17 Old 11-06-10 Thread Starter
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Cheers guys, my previous post may have been harsh.The trouble with engines and the variants of the same engine is as you get to know a type it has subtle changes or is totally revamped.I knew the jts 156 was a reworked twinspark (or i presumed so) but did not know how much had changed.Obviously the head and wiring and sensors would be different but the block and pistons and crankshaft section i was not sure about.
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bottom end compatability

Quote:
Originally Posted by biffa View Post
If the bottom end has gone yes you can swap all the JTS onto a TS block you may need to change the pistons as both engines have cutouts for the valves but the JTS has also a cut out for the injector...
so what happens if you have a JTS block with a piston completely missing and the cylinder deaten up?

Will the pistons hit the injectors if i use the entire TS bottom end? I suppose the answer is probably yes, if i got the same dent machined into the TS pistons would that be ok?

Is the crank sensor ring etc the same?

I have just bought a 156 JTS as a snapped belt project but the Block is cracked and head is virtually scrap so i need to build an engine.

Any input would be greatly appreciated, i am looking for engine parts too.

regards Jim
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Thanks, i have made an offer on that but it was declined as its more than the car would be worth at the buy it now. I have the ability to rebuild though.

I now know the head can be saved, so my latest idea is to mill the dent for the injectors out of the pistons wich wont be too bad if i can get away with it.

Last edited by themadsparkie; 29-06-11 at 01:29.
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