Saxo Engine/Performance If you're interested in tuning Saxo engines, or if you need to know something which is engine related... this is the place for you. |
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26th January 2019, 23:17
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#1
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Infrequent Poster
Join Date: Apr 2010
Location: cannock
Posts: 126
Car(s): polo mk6 1.4 tdi, mango saxo mk2 furio
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What cams?
I have a c2 vts with tu5jp4s engine, can help in feeling that my old 106gti/vts was a lot more aggressive,
I’ve searched a few threads regarding this
Can I put j4 cams, retainers and springs in and expecting a good power gain ?
What are my options ?
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26th January 2019, 23:22
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#2
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Saxperience Forum Bum
Join Date: Dec 2012
Location: Perth
Posts: 3,663
Car(s): Peugeot 106 1.1 Turbo
Peugeot 106 1.5D Turbo
Peuge
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Quote:
Originally Posted by payton31
I have a c2 vts with tu5jp4s engine, can help in feeling that my old 106gti/vts was a lot more aggressive,
I’ve searched a few threads regarding this
Can I put j4 cams, retainers and springs in and expecting a good power gain ?
What are my options ?
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No you can't expect a good gain at all.
It feels flat because the JP4S has better valves and camshaft profile, so has much better torque and more efficiency. Putting in J4 cams will only make it slower.
People used to think that if you fitted J4 cams to a JP4 you'd suddenly get the same power as the old J4... nope.
Could maybe jsut get yourself some JP4S high lift cams?
__________________
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26th January 2019, 23:33
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#3
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Infrequent Poster
Join Date: Apr 2010
Location: cannock
Posts: 126
Car(s): polo mk6 1.4 tdi, mango saxo mk2 furio
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Yeh that’s the opinion I was getting/ mixed answers, been reading then about piston clearance
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27th January 2019, 09:18
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#4
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Infrequent Poster
Join Date: Jul 2018
Posts: 163
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Quote:
Originally Posted by MartinObviously
No you can't expect a good gain at all.
It feels flat because the JP4S has better valves and camshaft profile, so has much better torque and more efficiency. Putting in J4 cams will only make it slower.
People used to think that if you fitted J4 cams to a JP4 you'd suddenly get the same power as the old J4... nope.
Could maybe jsut get yourself some JP4S high lift cams?
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Hi Martin,
Wonder if you could expand a little on this? It's probably just me reading this wrong, but I am a bit confused. Reason I am interested is that my Saxo VTS came with a JP4S engine fitted to it.
You seem to be saying that the JP4S engine, with it's own cams, has more torque than the J4 and this is why the JP4S feels less powerful?
I'm missing something
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27th January 2019, 23:11
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#5
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Saxperience Forum Bum
Join Date: Dec 2012
Location: Perth
Posts: 3,663
Car(s): Peugeot 106 1.1 Turbo
Peugeot 106 1.5D Turbo
Peuge
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Quote:
Originally Posted by dturbo
Hi Martin,
Wonder if you could expand a little on this? It's probably just me reading this wrong, but I am a bit confused. Reason I am interested is that my Saxo VTS came with a JP4S engine fitted to it.
You seem to be saying that the JP4S engine, with it's own cams, has more torque than the J4 and this is why the JP4S feels less powerful?
I'm missing something
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When I say it makes more torque, I mean torque as a quantity not a peak value. you're not going to feel 6nm difference in torque. It's all in the power delivery.
J4 needs to be revved hard to go anywhere, a JP4S doesn't by comparison.
point is, you wouldn't fir J4 cams to a JP4S because it's just not the right cam for that engine. You'd just buy aftermarket high lift cams for a JP4S.
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The rain kept a trollin'
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28th January 2019, 07:29
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#6
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Infrequent Poster
Join Date: Jul 2018
Posts: 163
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gotcha. Makes sense, thanks Martin.
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28th January 2019, 18:11
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#7
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Saxperience Forum Bum
Join Date: Dec 2012
Location: Perth
Posts: 3,663
Car(s): Peugeot 106 1.1 Turbo
Peugeot 106 1.5D Turbo
Peuge
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Quote:
Originally Posted by dturbo
gotcha. Makes sense, thanks Martin.
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No worries, that's my understanding of it anyway.
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