Cam Upgrade: What are your thoughts on this?

[DjLiquid]

I got my hands on a set of 248's from a CA18DET. So now I have two exhaust cams. If I were to run 2 exhaust cams and take out the stock 240 intake cam, would it be a waste of time or would I actually see any power gain? I figured I would but I thought I would ask the guru's =)

[89'ClubK's]

Never heard of running 2 exhaust cams, so I don't know really what gains or loss you would see. Are they going into a KA? I thought about the JUN cams for my CA, but then I was told by many people that it is a waste of time with a turbo engine. Mostly a NA upgrade. I would still figure that you'd see some power difference. Sorry if that doesn't help.

[boost_boy]

I got my hands on a set of 248's from a CA18DET. So now I have two exhaust cams. If I were to run 2 exhaust cams and take out the stock 240 intake cam, would it be a waste of time or would I actually see any power gain? I figured I would but I thought I would ask the guru's =)

It works and you will get some benefits from doing this, but don't be looking for no major increases. And please don't make a big issue about this guys! Dee

[beans33]

so by running two 248 Ca exhuast cams will provide some extra power ?Like Dee said I dont think its anything to keep going on about but, its something nice to know !!

[DjLiquid]

now by taking a look into this, it looks like the cam will need to be modified to make room for the CAS =/... Maybe I didn't look at it well enough but I may be wrong.

[Swedish Mike]

People started using double exhaust cams over here and now you can´t find a used engine with exhaust cam anymore... All the junkyards got open engines with dirt in the heads from people picking the cam and leaving it open.

I´ve tried it and no, nothing you can feel. No idea.

/Mike

[DjLiquid]

I just took a look at the engine and i got myself mixed up. The exhaust cam is the one with the crank angle sensor *knocks head* DOY! Thats no biggy now =).... The only problem I can see in the future is the a/f ratio. With a larger duration and more lift wouldnt it be true to say I should be adding a bit more fuel to my mixture to balance out the added air in there? I guess it's time to upgrade to a wideband O2 sensor and get my SAFC2 in there as well =)

[float_6969]

The nearly negligible amount of air that you will be adding extra will be compensated for by the stock ECU and MAFS.

[DjLiquid]

People started using double exhaust cams over here and now you can´t find a used engine with exhaust cam anymore... All the junkyards got open engines with dirt in the heads from people picking the cam and leaving it open.

I´ve tried it and no, nothing you can feel. No idea.

/Mike

buh? Im a little confused about the "No idea" part. Are you saying you've tried this mod and there is no difference?

I just want to clear this up before I start ripping apart my cylinder head =)

Thanks!

[Swedish Mike]

buh? Im a little confused about the "No idea" part. Are you saying you've tried this mod and there is no difference?

I just want to clear this up before I start ripping apart my cylinder head =)

Thanks!

Correct, this became the new CA "thing" to do here a few years ago.Sometimes people do stuff just to do something, not because it makes any difference.

I´ve tried it and this mod sucks, you can´t measure any hp gain.The fastest stock head CA´s here still use stock cams, only newbie´s using exhaust cam now.

/Mike

[dash]

I think I remember reading that when using the exhaust cam it will be 9 degrees off or so ? SXOC forum has a ton of very detailed info on ca16/ca18 cams in DETs