1.9 And 1.6 Performance Cams

[lahondal 17]

Hi all!

Can a Xu9 298º cam, and a Xu5 298º cam have a different powerband?

Can the Xu5 cam be more wilder, although the cams are of the same overlap?

Thanks!

[pug_ham 244 3 Cars]

Are they not exactly the same cam so the power band won't be any different?

 

g

[kyepan 291]

are you asking so you can fit one from the other? what's the reason for the question?

[welshpug 1,661]

manufacturers don't tend to distinguish between the XU5 and XU9 engines, but due to the nature of the engine a 1.6 will rev higher and have a narrower powerband.

[lahondal 17]

The problem is that I have a 1.6 engine which should be very revy, but It dont like to rev past 7000. Then, searching the problem I notice that the cam is a 298º degree cam but designed for a 1.9.

 

Its a Catcams 4900368 and the specs are:

 

Inlet/Exhaust

-Duration at 0.1mm+cl: 298º/298º

-Duration at 1.0mm+cl: 260º/260

-Max Lift: 12.50mm/12.50mm

 

The similar 298º cam for a Xu5, have 271º duration at 1.0mm, and a little more lift, 13.00mm.

 

Thanks for the replies.

Edited May 21, 2013 by lahondal

[welshpug 1,661]

its an 8 valve, not many rev past 7k even a 16v barely makes power past 7k.

 

its not jap

[lahondal 17]

I hoped would be a revy engine, but in the end...

So the best thing I can do is converting it to 1.9? It will not be the revving engine I like but it will make more power...

Thanks all for the replies!!

Edited May 21, 2013 by lahondal

[boldy205 75]

VTEC?

[welshpug 1,661]

totally depends what you want, you could probably get similar results dropping a 100% standard gti6 lump in there!

[shalmaneser 26]

I found my gti6 to be much lazier than my old 8V 1.6. Certainly tons more power but the throttle response is not as good - down to the heavier flywheel i guess.

 

but certainly much easier than faffing around with cams and tuning the 8V.

[amusingadam 6 1 Cars]

just out of interest what the hell did you want it to rev to

[omega 82]

just out of interest what the hell did you want it to rev to

 

and why?

[amusingadam 6 1 Cars]

and why?

 

i was told it was possible to drop the limiter and rev the balls out of a 8v

Edited June 3, 2013 by amusingadam

[welshpug 1,661]

to what gain?

 

peak is at 6000, limiter at 6200, for a reason, i.e there is no power any further....

 

 

granted if you are on a longer duration wilder cam the revs may need to go higher to reach that peak, but you wouldn't be doing that on a standard induction system for sure.

Edited June 3, 2013 by welshpug

[welshpug 1,661]

I found my gti6 to be much lazier than my old 8V 1.6. Certainly tons more power but the throttle response is not as good - down to the heavier flywheel i guess.

 

but certainly much easier than faffing around with cams and tuning the 8V.

 

what a random comment,

 

the gti6 flywheel is barely heavier if at all, its a square design (86x86) so inherently is quite revvy, I would imagine if you have experienced a tired example in a 300 kilo heavier 306, them that may be the impression gained.

 

but a healthy example in a 205 it certainly is no contest.

[amusingadam 6 1 Cars]

my 1.9 does the job i want it to, it keeps up with my mates jdm dc2 up to around a 100 then i'm out of steam don't think it was made to do that much more.