JP4s conversion [Archive] - Saxperience

Ben_SaxoForte

21st February 2016, 20:39

Planning on putting jp4s in the saxo at some point just wondering what I need to put it in a vtr I know I will need a vts ecu/loom and the sump needs to be swapped over. Take it the engine mounts will just bolt on? Can the aluminium c2 inlet be used or do I need to use a saxo inlet?

stevo67

21st February 2016, 20:42

Manifold needs swapping over too I believe,there's a guide with pics in the engine/performance section.

Ben_SaxoForte

23rd February 2016, 22:32

Can the c2 inlet be used? have heard of people using them on boosted saxos as they are stronger but what about standard? The reason I would rather use the c2 inlet is simply because its difficult to get hold of a good vts inlet that's not got bits snapped off or broken..

Phaeton

24th February 2016, 01:32

If you can get the Saxo throttle body to fit onto the C2 manifold you maybe able to use it, the main reason people use the Saxo manifold is due the the C2 being fly by wire not cable. Depending on how new the JP4 is & what kind of manifold you intend to use you will also have to move the oil filter.

Phaeton

24th February 2016, 14:32

Just a thought if you use the C2 inlet manifold then you will also have to use the C2 injectors as they are different to Saxo ones, I know as I lent a set to a Saxo owner & they didn't, which could mean you may have fuelling issues if you go with a standard ECU

Ben_SaxoForte

24th February 2016, 18:01

Hmm that is a problem.. could probably make up some kind of bracket to fit the throttle body but I didn't realise the injectors are a different size.

Phaeton

24th February 2016, 18:43

They were from a C2 VTR which is a 16V not sure about a VTS as that has an alloy manifold which had already been taken off of my engine

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Saxvtsdan

25th February 2016, 12:41

Parts off a j4 you need
Sump
Exhaust manifold
Inlet mani with tb ect head also needs to be drilled an tapped to except the j4 inlet
Engine wiring loom
Gear box
Fly wheel/ clutch assy
All sensors
Metal oil filter
Hole tapped and a bolt put in it for the old paper filter
Cams
J4 cam belt kit
Timing cover
Maybe one Ive missed out but I know this from doing one

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Ben_SaxoForte

25th February 2016, 13:12

Phaeton

25th February 2016, 13:15

Parts off a j4 you need
Hole tapped and a bolt put in it for the old paper filter (If it's a later engine, you'll need a sandwich plate for oil pressure switch)
Cams (Not if it's a VTS engine)
J4 cam belt kit (It's the tensioner that needs changing)

Ben_SaxoForte

25th February 2016, 13:31

Will the sump off a vtr engine fit? better start making a list of the bits I need

Phaeton

25th February 2016, 15:04

It should do the difference between a Saxo VTR & VTS is the head, as far as I know the short block is the same.

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Saxvtsdan

25th February 2016, 15:55

Jp4 cams are different vtr or vts regardless!

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Saxvtsdan

25th February 2016, 15:56

Why do you think the c2 vts boys put j4 cams in? Because there hotter

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Phaeton

25th February 2016, 16:00

Duration & lift difference is very minimal from Saxo VTS to C2 VTS but from Saxo VTS to C2 VTR there are differences, as most JP4 conversions use C2 VTR engines as C2 VTS's are quite a rare beast

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Saxvtsdan

25th February 2016, 16:06

Never knew cams were different I was told it was map and inlet as that's the only visual difference I could see

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Saxvtsdan

25th February 2016, 16:07

Oh and also to the kid who's doing this if you need any bits I maybe able to help

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Phaeton

25th February 2016, 16:27

The green valve springs on the C2 VTS are also stronger if you're using a C2 VTR then you should swap to the Saxo VTS cams & springs

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Ben_SaxoForte

25th February 2016, 21:24

Will definitely be going for a c2 vts engine as obviously its got more bhp but also I would rather not mess around swapping cams over plus that would be more parts for me to buy as I currently have a vtr engine so no cams to swap.

Thanks for the offer of parts will keep that in mind :y:

VTS engine looms seem to be quite difficult to get hold of.

Saxvtsdan

26th February 2016, 00:23

I might know to a single and 3 plug loom

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Chipwizards

26th February 2016, 20:26

Pistons are different between VTR and VTS C2. Smae compression but the VTS has valve clearance that the VTR doesn't need.

Chipwizards

26th February 2016, 20:29

There's a bung in the front of the block to put an oil pressure switch in, so you don't need to adapt anything there.

There's just a hole you need to blank off in the front of the block, about 7mm diameter behind the JP4 oil filter extension, it's there to allow oil from the filter housing to drain into the sump when you change the oil and filter.

Phaeton

26th February 2016, 20:30

There's a bung in the front of the block to put an oil pressure switch in, so you don't need to adapt anything there.

Not if it's a late model engine the taping isn't there, I think it's after 2006

This is the post I started my research with http://www.saxperience.com/forum/showthread.php?t=323539

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