Can i use a exhaust cam on the intake side?

[Giallo spyder met]

Do i get som more power out the engine with 2 exhaust cams.And how do i install it?

[r34 gtr]

remove upper timing cover, loosen timing belt via tensioner on left side, unbolt cam gear on intake cam, unbolt intake cam, replace with extra exhaust cam, re-attach cam gear, tighten as per FSM, re-time engine. the power you will make can be described as negligible at best.

[Giallo spyder met]

In sweden they use this re-timeing.

http://200sx.kicks-***.net/ant...1.jpg

[r34 gtr]

that would be the proper proceedure. good pictures actually! maybe we can use them on here. anywho, its a little tricky to get everything lined up properly so you might want to get a buddy to help out with it. the cams have a nasty habit of wanting to jump out of place.

[Giallo spyder met]

The cam on the inlet should be one step forward?

[float_6969]

IDK, how I feel about that. If the cams need timed, get cam gears. This is also an interference motor, and although one tooth wouldn't make the valves hit the pistons, you've got much less room for error if the belt ever does jump.

[r34 gtr]

uuum, the marks need to be lined up properly. i dont think moving the gears a tooth to advance/retard timing is a good idea. ive only done it by accident, and the car ran terribly. i didnt notice the little dot on the cam gear, i just assumed it was factory timing. sorry if i caused any confusion.

[Giallo spyder met]

uuum, the marks need to be lined up properly. i dont think moving the gears a tooth to advance/retard timing is a good idea. ive only done it by accident, and the car ran terribly. i didnt notice the little dot on the cam gear, i just assumed it was factory timing. sorry if i caused any confusion.

Everywon in sweden tells me that is how to do the timeing with 2 exhaustcams on ca18det.But i dont belive thats right.

[r34 gtr]

ive always used the factory timing settings. cant comment on everyones set ups in sweden, maybe they know something i dont, but i would just stick to factory.

[nocwage]

If I recall the exhaust cam is retarded 10 degrees compared to the stock one if you line it up the same.By jumping the tooth you'll end up with it closer to 'stock'

I can't prove this however

[r34 gtr]

hmm, makes me want to go re-adjust mine.... though i have no idea if im using the intake or exhaust cam from the ca16.

[nocwage]

If I recall the exhaust cam is retarded 10 degrees compared to the stock one if you line it up the same.By jumping the tooth you'll end up with it closer to 'stock'

I can't prove this however

I want to reiterate that I can't prove this at the moment, I read it a while ago and saw proof however my memory is crap and i can't find the original info so please don't just advance it 10 degrees.. check I'll try to find more info tommorow

[r34 gtr]

you can always advance it ten degrees and if it runs like crap, turn it back a tooth. i think worst case scenario it runs terribly at idle and you know it isnt working right. you dont even need to put the timing covers back on, just the belts and pulleys....crap just dont mess with it.

[float_6969]

Yea, buy real cams.

As was previously stated, the power increase can't be THAT much.

[Giallo spyder met]

EURO spec CA16DE...

In lift - 8.5mmEx lift - 8.5mmIn duration - 248Ex duration - 248In opens - 15 BTDCIn closes - 53 ABDCIn center lobe angle - 109degEx opens - 59 BBDCEx closes - 9 ATDCEx center lobe angle - 115deg

EURO spec CA18DE...

In lift - 8.5mmEx lift - 8.5mmIn duration - 248Ex duration - 248In opens - 16 BTDCIn closes - 52 ABDCIn center lobe angle - 108degEx opens - 50 BBDCEx closes - 18 ATDCEx center lobe angle - 104deg

EURO spec CA18DET...

In lift - 7.8mmEx lift - 8.5mmIn duration - 240Ex duration - 248In opens - 0 BTDCIn closes - 60 ABDCIn center lobe angle - 120degEx opens - 59 BBDCEx closes - 9 ATDCEx center lobe angle - 115deg

Som ni ser så skiljer de 15 eller 16 grader mellan DE kammarna och DET kamens öppnings punkt. Genom att sätta hjulet ett kugg "fel" så korrigerar man för detta.

Edit: Tror jag...

[r34 gtr]

word.

[Masterdebater]

im thinking about doing this but i really dont want to mess it up... i have 440 injectors and i dont believe it is tuned for it but the t28 makes up for the extra fuel when i throttle. u think if i did this same cam swap it would help compensate for the extra fuel? im still learning about the ca :/

[themadscientist]

I did twin exhuast cams on my RB20 and picked up some top end with the increased duration. I installed them with the stock sprockets. I AM IN NO WAY SAYING IT WILL WORK ON THE CA18.I am just saying it worked on an RB20 and I got the idea from a guy who did it on his 4AG. You need to ensure the valve timing is correct or you will be sad.

[r34 gtr]

you boys have peaked my interest. i might go fiddle with my intake cam timing tomorrow. actually, scratch that, i broke a tail light replacing the gaskets and its supposed to rain. i will however do it friday. one tooth forward for 10 degrees you say?

[Giallo spyder met]

you boys have peaked my interest. i might go fiddle with my intake cam timing tomorrow. actually, scratch that, i broke a tail light replacing the gaskets and its supposed to rain. i will however do it friday. one tooth forward for 10 degrees you say?

Have you done it get.How did the engine felt?

BR/ Mattias

[float_6969]

Please keep in mind that the performance gain that you are going to get from using either one of these cams is going to be negligible.

[Masterdebater]

wouldnt be worth my time cuz knowing me id prolly break something and not have money to fix it :/

[dattodude]

Lay a pair of cams together.

Line up the bumps so they are all pointing the the same direction.Compare the camwheel 'key' and see how different they are.

Then consider how different the keyway position is when comparing the intake and exhaust cams. I've never checked. They may be close or the same.

I'm just supplying a technique to get it close to right without buying camwheels.

[tineira]

hmm, makes me want to go re-adjust mine.... though i have no idea if im using the intake or exhaust cam from the ca16.

If it has the nipple for the CAS it is an exhaust cam.

[r34 gtr]

i remember now, im using a full set of ca16 cams! my idle is a little lumpy and it hunts a bit, but other than that its fine. i couldnt tell you about the power gains, i swapped my cams the same time i threw on the gt28 and 510s. by the way i havnt worked on squat. talk is cheap and im loaded with it.