For those who have installed these cams are you happy with the performance upgrades? How much better responce did you get? Is it difficult to shim? How did it effect your fuel milage?
OK. Listen up. 00rs is right. The connection of the tappet to valve stem IS angled, but it is still hitting close to dead center, we got in there with a light and magnification (photo ~ you got to be kidding!).00rs said:The sohc do have roller rockers.
All the delta cams are that way, as well as twe from what I hear. This is normal, it does make it alittle harder to adjust the lash since it seems to grab the feeler guage, and they will make more noise than normal but will work fine. My delta cams have been in for 15 or 20k miles rechecking valve lash 3 times inbetween (no adjustments needed and no abnormal wear).
If you don't have them already the el header w/no or hfc makes a huge difference the the cams.
When you talk about "valve settings" what is that exactly? I am very interested in doing this and will prolly do it with a friend of mine. Can this be done by an "intermediate" who knows a little or should I have it done professionally?OK. Listen up. 00rs is right. The connection of the tappet to valve stem IS angled, but it is still hitting close to dead center, we got in there with a light and magnification (photo ~ you got to be kidding!).
Picture this: > That is the angle between the tappet/rocker arm and the bottom of the valve stem with the new geometry. But, it still hits the flat spot on the bottom of the valve...
I had three Suby techs (each with 20 years + as certified Subaru techs) on the conference call. After almost 1/2 hour on the phone with Scott (Delta) they were convinced on Scott's comments and approach to higher lift and longer duration were dead on and the comments we got from past customers confirmed 'no issues'.
So, we finished the job and 'buttoned 'er up'. The valve train noise is NO more then OEM. Factory valve settings are 8 & 10, Delta suggest 6 & 8 and we went with 7 & 9 (based on Cobb's recommendation). Also, run a 1,000 mile break in with REAL oil... then you can switch back to synthetic.
BUT ~ Now, this is the problem. Idle.
I knew we would be 'lumpy' (It always has been with a 'performance cam'). But, the damn car would idle perfect @ 900-1000 RPM if we could 'set' the idle. However, the ECM wants to idle it at 400 RPM (please give me 'old school with a simple 'idle screw' ~ why does something sooo easy have to be so hard?).
At least 30% of the time it now stalls at a stop. Now, the '07 ECM (factory) is the 1st to have 'idle control' and lets the tech set any idle speed between 0 - 2000 rpms. but this won't work on any non-variable valve timed car.
So, you people with Deltas ~ how did you kick up the idle on your car?
PS: DJ, the cores are coming to you, I don't feel there are any worries about the install and longevity of the valve train. I spoke to several happy customers (count 00rs in as well).
But, we DO need to put our heads together and come up with a way to increase the idle RPMs. BTW- The car seems MUCH stronger pulling to high RPMs... but I am not going to stand on it hard till I have a couple hundred miles on the clock.
To get this done right and to try and pave the way for the rest of you, I spent 12+ hrs of labor on this. Someone else needs to get a 'base line' and an 'after' pull on a dyno, I am tapped out $$$! :blowingup
:stupid:ej25power said:Your throttle doesn't have the adjustment screw? Kinda weak.
Thanks for the write up though.
When I get a job, I'll look into getting a "baseline", or if someone beats me to it, I won't.
Thanks for the clues ~ I will pass this on and we will see what we can do!Storm said:You can't just crank in the little screw on the TB anyway...that's how you fuck up the idle real quick. The ECU will fight the sensors and you'll have a constant searching idle up and down.
The SSM used to have the capability to adjust the idle values...did the techs look into that? The only way I was able to consistantly bump the idle on any of my motors was to bypass the coolant going through the IAC. Not all years have this, so YMMV.
What about vacuum? Can you reroute some lines to see if any changes are made in the idle?
I didn't say yes? I am still looking for a way to change my throttle on the 'fly by wire' newer cars ('05/'06) the '07s have the function built into the ECM, like they ALL should be!ej25power said:Sooo, can you or can't you adjust the throttle by adjustin the screw on the TB?
Storm says no.
NW OBS says yes.
The product "does not support '04+ at this time..." Damn.DumbUglyDragon said:You can get Delta Dash(computer datalogger) and wire it in. It can raise the idle via the ECU, IIRC.
http://www.ecutek.com/products/deltadash/
Gumby... Thanks for some very sound advice. I will actually try both down the road here ~ but I am getting this sorted out rather quickly to tell the truth... but I will still want some more RPM. So, I might be 1st in line at the 're-flash corral' at Subiefest in November!Gumby647 said:You could try increasing the valve lash to the loose side of factory spec. This will give less overlap and may help the idle some. Also if your engine management allows ignition timing adjustment at idle a little advance might help.