cam duration too mild?

[Ahmed Bayjoo]

spec is : power band 2000-6500 rpm

duration in:258 ex:248 valve lift in: o.380/964 ex: 0.360/9.14

cam lift is the same figures as valve lift

timing open:18-58 close 58-18


just wondering if these are quite mild cams, the duration up from these which is 264 , is stated as it can not be run on standard injection.

but the cat/pipers run 264 with the standard injection so is there sumthing else to these cams

[stan]

yes they are mild. both will be fine on standard managment.

[rossdj1983]

264's are generally a good all round cam

[Tuche Brazil]

264's are generally a good all round cam

As I posted yesterday I am looking for a Cam for my 19 16v build that I going to start soon.

Unfortunatelly here in Brazil is very hard to find someoen that already did this before, and we don't have performance parts for Renault of these age.

Those 264, and even the 258/248, from how many horsepower can we gain running these two cams, are we talking about? Of course with a remap added.

[juuhanaa]

I'm working to get three different engines on dyno same day, so that I can answer this question..

If I manage, I will post the result in this forum. First engine is catcam 286/279, Second is grinded cams 260 degree duration ( measured from 0 lift ) and max valve lift 10,5mm. Third is stock F7P cams.

All three engines has totally different setups, but the cams are all for stock valve springs and lifters.

[juuhanaa]

I'm working to get three different engines on dyno same day, so that I can answer this question..

If I manage, I will post the result in this forum. First engine is catcam 286/279, Second is grinded cams 260 degree duration ( measured from 0 lift ) and max valve lift 10,5mm. Third is stock F7P cams.

All three engines has totally different setups, but the cams are all for stock valve springs and lifters.

Here is grinded 260degree (approx 220degree from 1mm lift). Inlet and exhaust open 1.15mm at TDC and lobe angle aprox 108.

R19 13.12.2020.jpg

[Tuche Brazil]

As I posted yesterday I am looking for a Cam for my 19 16v build that I going to start soon.

Unfortunatelly here in Brazil is very hard to find someone that already did this before, and we don't have performance parts for Renault of these age.

Those 264, and even the 258/248, from how many horsepower can we gain running these two cams, are we talking about? Of course with a remap added.

I'm still in doubt if I go on the Newman-cams 258/248 or the Newman-cams 264/264. Is it really necessary to install with verniers pulleys in both cases, or is it possible to just assemble in the OEM pulleys?
Please, I really need some good advise because I'cant find almost nothing in Youtube and here in Brazil, nobody in our R19 club did this before.

[Tuche Brazil]

I'm still in doubt if I go on the Newman-cams 258/248 or the Newman-cams 264/264. Is it really necessary to install with verniers pulleys in both cases, or is it possible to just assemble in the OEM pulleys?
Please, I really need some good advise because I'cant find almost nothing in Youtube and here in Brazil, nobody in our R19 club did this before.

Diesel pulleys bought! Just need to choose now between 264/264 or 258/248...

Are those 264/264 that kind of cams that only works in high revs, almost losing from standart in low/mid range?

[Ahmed Bayjoo]

but will a say 264 piper/264 catcam/264 newman all be the same in terms of performance.

what bit actually diffrentiates the different types

[stan]

quite alot....264deg doesnt tell the whole story...you need to compare 0.1mm duration and 1mm duration to gain a better picture of the` overall profile. then you can consider valve opening/closing points...this really defines performance.

between different manufacturers, there could also be manufacturing differences....