which cam to use on Tu5jp4 (N6A)

9th September 2012, 07:12

hi all
I really want to know to make my tu5 more powerful, which cam profile can I use on it without remaping the ecu.
thanks in advance.

9th September 2012, 08:47

Your going to get better results with a remap. You could use Newman ph3, catcam 708 or the newer 743 I believe

9th September 2012, 11:20

Be VERY careful with any of the above cams in a JP4 engine. They are not recommended as valve/piston clearances are too tight. It's been done of course, but you take your own chances...

9th September 2012, 11:26

as said, catcams do a completely different range of profiles for the JP4 engine compared to the J4 engine, this is due to the fundamental differences in the engine such as piston crown, valve sizes and valve spacing.

Best bet would be to call catcams and see what they would recommend. I dont think any of the other common suppliers for camshafts for this engine have such a comprehensive range as catcams.

10th September 2012, 06:00

thank you all so much
is any body here that tried any of this cams and the results were good?
whats your idea about Pipercams?

11th September 2012, 12:57

Why do you want a camshaft in if you don't want to remap. You will have to use mild camshaft profiles which only give small gains. Argueably for the price of the cams and fitting its hardly worth it. The good ones need fuelling correctly set to get the best power and protect the engine.

12th September 2012, 16:08

because i dont have access to remaped ecu or some one that can do it for me
do you know?

12th September 2012, 16:23

If you fit a 708 to a TU5JP4 engine then the valve springs will 'coil bind' apparently, so beware of that too.

12th September 2012, 16:50

is this really a tu5jp4 -- as in plastic cam boxs and paper filter housing +cat on manifold
i say this because peugeot list there engine codes different and they called a 106gti a jp4 .If it is std engine fitted to a saxo or a 106 it is tu5j4

13th September 2012, 05:50

In fact its a peugeot 206 1.6 and not a saxo.
whats your idea about catcam 1321705 ?
Yours.

13th September 2012, 08:19

705's are a gti/saxo cam. Yes they'll fit, but as you've been told above, there are cams made for the JP4 engine which would work better.

13th September 2012, 08:41

Quote:

Originally Posted by hossein206

In fact its a peugeot 206 1.6 and not a saxo.
whats your idea about catcam 1321705 ?
Yours.

If it has lfy by wire throttle then it ias very hard to get much power gain without modifying the ecu .
how much of a bhp increase are you looking for over the std 110bhp @fly

14th September 2012, 14:28

its ecu is ME 744 bosch so the throttle is exactly this:
http://www.carparts-uk.com/vimages/b...c/1i0n2xl7.jpg
i need about 130-140 Hps
can any one help me with remapping the ECU ?

16th September 2012, 15:30

please help...

2nd October 2012, 10:17

up...
........

2nd October 2012, 18:29

The 701 are the straight swap cams for the 1.6 206 which use oem springs and retainers etc but even this requires a remap to correct fueling, are quite expensive at around £420 I suppose that's down to economies of scale http://www.kamracing.co.uk/peugeot/p...-camshaft.html

And just Google to find your nearest mapper I use Northampton motorsport cost me 270 to have my car mapped
You might see 140bhp which is a 30bhp jump which you usually see on a cammed vts with breathing mods

2nd October 2012, 19:05

change your valve springs to J4 ones from a saxo VTS then run the 708 cams.

You could try the saxo VTS j4 cams in your JP4 engine for some very cheap reasonable gains without the remap mind.

2nd October 2012, 19:09

I think you'll still have the problem with the saxo cams oem or aftermarket items not hitting the valves correctly hence why the jp4 engine had its own specific cams as they are all offset to fit the jp4 head

Also you might well run 743 cams if going for 708s

2nd October 2012, 19:21

if you ran a j4 bottom end and head gasket with a jp4 head with 743s would there still be clearance problems? sorry for the mini hijack

2nd October 2012, 21:14

Quote:

Originally Posted by Gumbo

if you ran a j4 bottom end and head gasket with a jp4 head with 743s would there still be clearance problems? sorry for the mini hijack

As said with using saxo cams in a jp4 head the lobes on the cam shaft won't hit the followers as they should the 705s are the cam to use in an engine running a jp4 head on a j4 bottom end with the use of saxo springs, retainers and followers http://www.kamracing.co.uk/citroen/c...s-1322705.html

not to clued up upon clearances though, but there must be Clarence issues as catcams wouldn't have made a specific cam for jp4 head on j4 bottom ends if there wasn't issues as you could just use the aftermarket jp4 cams otherwise

2nd October 2012, 21:20

Spot on thanks mate appreciate it.

2nd October 2012, 21:23

no worries mate

2nd October 2012, 21:33

Actually the lift and duration are the same and so are the rest of the stats compared to 708s/743s however the 705s are still the one to use, I think they are basically the 708 cam shaft but are off set for the reasons already explained

what ever you do don't get these confused with the 705 which are made for j4 engines get the ones in the link

3rd October 2012, 13:20

with all the jp4 head internals replaced with j4 ones how well will the jp4 705's run unmapped? as il fit myself but may need to use for a short time before i get a chance to book a session on a RR

3rd October 2012, 16:28

You can run J4 saxo vts standard cams in a jp4 head without changing the valve springs.

The tolerance is tight but its acceptable- someone on shed stated them.

I ran VTS cams in my jp4 engine and had no problem. I did end up changing the valve springs to J4 ones at a later date.

I know numerous people who have ran j4 cams straight in a jp4 head without changing springs and there still going strong.

3rd October 2012, 16:32

Quote:

Originally Posted by Aaron

You can run J4 saxo vts standard cams in a jp4 head without changing the valve springs.

The tolerance is tight but its acceptable- someone on shed stated them.

I ran VTS cams in my jp4 engine and had no problem. I did end up changing the valve springs to J4 ones at a later date.

I know numerous people who have ran j4 cams straight in a jp4 head without changing springs and there still going strong.

It's not acceptable for Sandy Brown, so it's not acceptable to me tbh. What if the head has been skimmed previously? or the casting is out by 5 thou?

Not worth the risk when there are correct cams out there for the same money.

3rd October 2012, 16:39

Hense; why i originally stated change your valve springs to j4 ones.

True, but all depends on users cash-flow and if they are handy with a spanner.

3rd October 2012, 16:46

Quote:

Originally Posted by Aaron

Hense; why i originally stated change your valve springs to j4 ones.

True, but all depends on users cash-flow and if they are handy with a spanner.

My angle was a somewhat sideways one - it's not the valve springs that are the primary concern. The main concern with J4 cams (PH3's, 708's etc) in a JP4 lump is that there is a high risk of valve to piston contact also. I'd be more worried about that that coil binding (and I've snapped valves from coil binding on a £expensive engine!)

3rd October 2012, 18:02

Quote:

Originally Posted by jeffchiz

Actually the lift and duration are the same and so are the rest of the stats compared to 708s/743s however the 705s are still the one to use, I think they are basically the 708 cam shaft but are off set for the reasons already explained

what ever you do don't get these confused with the 705 which are made for j4 engines get the ones in the link

thanks again bud. i will go with the safer option of the 705s cheers