Jump to content
SAU Community

Recommended Posts

I have just had a HKS Adjustable Exhaust cam gear fitted to my R33 Series II GTS-T 96 model.

ITs got a powerfc, full exhaust and split dump, pod filter, 11psi, and 10% mix of toluene.

My mechanic, very respected, (just got 300rwkw out of a VL turbo that day for an example just tuning it) put the cam gear in, and set it to 1,2,3,4 degrees retard, and 2,3,4 degrees advance, and every position the car lost power,

The only position the car made good power was at 0 degrees.

Anyone seen this before? I thought 4 degrees retard was supposed to make more power in the bottom end?

:)

He's tuning the power FC and has managed to push it from 160rwkw to 180 so far, and like 2 hours

He says there is more to go yet

Link to comment
https://www.sau.com.au/forums/topic/52256-cam-gear-results-not-good/
Share on other sites

I have just had a HKS Adjustable Exhaust cam gear fitted to my R33 Series II GTS-T 96 model.

ITs got a powerfc, full exhaust and split dump, pod filter, 11psi, and 10% mix of toluene.

My mechanic, very respected, (just got  300rwkw out of a VL turbo that day for an example just tuning it) put the cam gear in, and set it to 1,2,3,4 degrees retard, and 2,3,4 degrees advance, and every position the car lost power,

The only position the car made good power was at 0 degrees.

Anyone seen this before? I thought 4 degrees retard was supposed to make more power in the bottom end?

:(

He's tuning the power FC and has managed to push it from 160rwkw to 180 so far, and like 2 hours

He says there is more to go yet

I agree with Bass, I know it is obvious but you never know. The CAS is connected to the camshaft itself, not the camshaftpulley. It looks like the CAS is connected to the pulley but it's not. I have seen very experienced mechanics make this mistake. If you retard the camshaft 4 degrees, you retard the ignition timing 4 degrees. So everytime you adjust the cam timing you have to reset the igntion timing with a timing light.

If you have been watching and he hasn't used a timing light to check the ignition timing then that's your problem. :spcartman

Hope that is of some help.

so why does it work for some and not for others?I personally think there are gains to be had.I have never done it b4 only heard mixed emotions on it more postitive than negative.

Personally i think that there are gains to be had and if you go to someone or are that someone who knows what they are doing when it comes to this kind of tune they could prove it also.

Not to much longer b4 my theory is put into practice on my car.

seems like latter model s2 r33 and R34 seem to get less gains than the others.. few people have xperienced this in the past. Could be something to do with the slightly different VVT setup in the newer cars.

But there are plenty of older threads on it.

I am going to start another thread about it, but he left the cam gear at 0 degrees and went and tuned the powerFC.

Here are the results.

Sydneykid, I appreciate your input, and will most certainly let him know. He is a very very experienced mechanic, but hey, not everyone can know everything. I am sure he will love the information, and most certainly try it.

I love the world of free knowledge.

pcy.JPG

ok, I spoke to my mechanic thismorning, and he said that whenever he adjusted the cam gear, he reset the Base timing with a timing light, this guy is pretty on the ball even though he hasn't really done a cam gear before on a skyline. He didn't really know what to expect.

Maybe the Series II's have differenty VVT or something, and the power is already tehre, and just needs a PFC to tap into it?

He said it was very easy to get that power, but didn't want to go too much further because he didn't want to risk detonation.

I reckon thats awesome power for only 10.5 - 11psi, and its so smooth, doesn't hit hard, its like got heaps of torque from the word go.

Pull the hardest at about 5k though.

Awesome to drive now.

On my R34 they did buff fu(k nothing.

Cost me $600 in workshop and dyno time (At Hypertech) to find this out for all of you.

Check out this thread.

http://www.skylinesaustralia.com/forums/sh...light=Cam+Gears

Can anyone confirm that cam gears don't work on late model RB25's?

I was looking at fitting one to my S2

mine came back yesterday (R33 S2) and cam gear picked up extra kW most of the way thru with around 15kW at the top end. they work fine.

mine came back yesterday (R33 S2) and cam gear picked up extra kW most of the way thru with around 15kW at the top end.  they work fine.

Thats a really good result, a couple of questions though.......

What cam gear did you get installed?

where did you get it installed and tuned?

You only need the exhaust cam gear right?

Cheers

Don't murder me but I'm pretty sure as the Rbs got newer, Nissan closed the lobe centres up. The early models ran very wide separation angles (Just like the VL turbo) but with newer models they closed them up gradually and increased overlap.

By what you guys are saying the gains are had by retarding the exhaust cam- is this right? If so then you are doing what nissan did with the later model hence less power increase because they have already moved them to a lesser extent.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...