Camshafts for the EG33.

[SVXRide]

Originally Posted by icingdeath88

The cams that I have, I know nothing about except what's in my signature:

244,8.1mm/256,9.1mm intake/exhaust

Do you guys think they will be an ok match for the turbo engine? The choices are either these or the stock cams, another set of cams are almost definitely not going to be in the budget.

I don't think there is anyway you can be running 9.1 mm of lift....

Who'd you get the cams from?

Bill

[dragoontwo]

Originally Posted by SVXRide

I don't think there is anyway you can be running 9.1 mm of lift....

Who'd you get the cams from?

Bill

It looks like the numbers for the ECUTune cams.

[icingdeath88]

Originally Posted by SVXRide

I don't think there is anyway you can be running 9.1 mm of lift....

Who'd you get the cams from?

http://www.ecutune.com/svx_camshafts.htm

Also, I will double check the amount of lift with a caliper while i have them off the car when I swap the engine.

[bazza]

Originally Posted by SVXRide

I don't think there is anyway you can be running 9.1 mm of lift....

Who'd you get the cams from?

Bill

This is what Mike LAN said to me when I was researching what was safe etc, Mike was very helpful

"If you use good profiles you won't have to change the springs. Tension increases with increases in lift and you'll keep control of the valves without increasing wear and risking snapping cams. Read my thread carefully and you'll find the information to avoid cutting the base circles too small or run into coil bind. I would try to come as close to my 8.1mm lift intake with 244 duration at 1mm lift and 9.2mm lift 264 duration at 1mm lift exhaust cams as possible. You'll be limitted to whatever masters your cam grinder has available so you will just have to pick the closest thing you can find."

The big camshaft shops here in Aus also had the same opinion.

Although I think the duration was a typo - running 264 duration @ 40 thou is 1200 hp drag car spec with advertised duration most likely over 300, not sure on that one.

For interest sake, here is the information of my friends turbo cam that we'll be testing soon. These were already proven in 1200 hp setup but as I said he chose to run less lift for lower maintenance reasons.

High flow EG33 turbo cam / solid bucket setup from billet cores:
Overlap of 109.00 degrees
Intake Duration of 318.00 degrees (4 thou)
Exhaust Duration is 340.00 degrees (4 thou)
Lobe Separation Angle is 110.00 degrees.
Inlet Cam centerline of 108.00 degrees ATDC
Exhaust cam centerline of 112.00 degrees BTDC
Duration at 50 thou = 235 degrees
Lift: 9.9 mm (I) and 10.0 mm (E) lift

My stage 1 cam / hydraulic bucket setup / basic cam grind:
Overlap of 46.00 degrees
Intake Duration of 270.00 degrees (4 thou)
Exhaust Duration is 276.00 degrees (4 thou)
Lobe Separation Angle is 113.50 degrees
Inlet cam centerline of 114.00 degrees ATDC
Exhaust cam centerline of 113.00 degrees BTDC
Duration at 50 thou = 220 degrees
Lift: 7.9 mm (I) and 8.7mm (E) lift

****ty Stock cam:
Overlap of 13.00 degrees
Intake Duration of 247.00 degrees (4 thou)
Exhaust Duration is 255.00 degrees (4 thou)
Lobe Separation Angle is 113.50 degrees
Inlet cam centerline of 114.00 degrees ATDC
Exhaust cam centerline of 113.00 degrees BTDC
Duration at 50 thou = 187 (I) and 195 (E)
Lift: 7.1 mm (I) and 7.9 mm (E) lift

[icingdeath88]

So mine are somewhere in between yours and the stock cams, in terms of duration, but with a little more lift than yours. Think they'll work ok for what I'm trying to do?

[bazza]

Originally Posted by icingdeath88

So mine are somewhere in between yours and the stock cams, in terms of duration, but with a little more lift than yours. Think they'll work ok for what I'm trying to do?

I certainly think they will do the trick nicely.

Something a lot of people don't realise also is the 1989-1994 RS Legacy and the WRX up to and including the MY96 also had terrible turbo cams. Even with a huge turbo and every supporting mod on the planet you'd only ever make 200 kw atw on a good day low reading dyno - they were attrocious, everything was bad, throttle response, wouldn't rev, low rpm limit, low torque, just nasty. Bin those horrible cams and run some V3/V4 WRX / STI cams and they're better again - ~280 kw atw being the upper limit. Stick some V5/V6 cams in and about the same top end but more midrange better throttle response, better spool etc. After that came AVCS but you get the point - the early cams be it WRX, SVX or RS were all nasty - most likely all ahead of their time back then but time has moved on.

I guess over time and millions of dollars of research, Subaru learnt that you can run far bigger cams and still get decent economy, cold start, idle etc and the cams over the last few years are massive compared to the earlier units.

So with a cam upgrade - you could seriously weld them up blind folded in your shed and still have an improvement over the stock cams. LOL well not that bad but I think you'd be hard pressed to make a mistake and go backwards, especially if you've got a good shop doing the work.

[bazza]

Also I forgot to mention - Tony is in the process of sorting out some NA spec extractors for my engine so we can do some NA testing - we just have to get plates and bends etc.

What we plan to do is a few runs with no turbo (removed from car) and the proper long runner style of NA headers as seen in Jack's EG33. Should give us some good info.

[bazza]

Originally Posted by SVXRide

Bazza,

Gotcha on the TS database!

Looking forward to seeing the results of the December runs! I checked out the GPX Pro / XT Studio site. Looks good! Are you running the 4 or 8 channel version? What, exactly, are you datalogging? I'm very interested in how you've got the car wired up and what sensors you're using (yeah, it's the "test and evaluation engineer" part of me rearing its head!

-Bill

Bill, I have the 2010 unit, so not 4 or 8 channel. Getting what I want logged and everything sorted is a work in progress as I keep changing and upgrading things. The good thing is 3 of my mates have also invested in the GPX Unit and we go racing together so it's very handy to compare notes. Next time out this is what I'm planning to be logging and hopefully this will be my final setup and won't require more changing / tweaking.

GPXPro:
Analogue 1: TPS
Analogue 2: Oil Pressure
Analogue 3: Boost
Analogue 4: Wideband
Digital 5: RPM

ECUDATASCAN:
RPM
Inlet air temp
Engine coolant temp
Boost
Timing
Injector duty
Injector pulse width
Accel enrichment
Gear

[SVXRide]

Bazza,

Thanks! "Investment" is definitely the right word!

I've got my very rough "experiment on/hack up" heads back, so I'm going to pull a set of intake and exhaust springs off of it. When sticking with the stock springs/valves/hyd bucket is the point at which you have coil bind ( - really a static measurement) coupled with the dynamic behavior of the hyd bucket and the static input of the cam a true measure of the max lift possible? Note that I'm using static here as short hand for "I can easily measure it on the bench with hand tools".

How much of a buffer do you figure the lifter is in all of this? Have you taken a lifter apart to see how much "give" it has before it behaves like a solid bucket?

Thanks.

Bill

[Dessertrunner]

Originally Posted by bazza

Bill, I have the 2010 unit, so not 4 or 8 channel. Getting what I want logged and everything sorted is a work in progress as I keep changing and upgrading things.

If its not a 4 or 8 channel what is it?
Tony

[bazza]

Originally Posted by Dessertrunner

If its not a 4 or 8 channel what is it?
Tony

2010 model. Think 5 channel, you'd need to check the tech manuals.

[bazza]

Half a lap from the other day whilst running the engine in - playing with a 600 hp Mustang.

http://www.youtube.com/watch?v=3eFnBiuQJgA

[SVXRide]

Originally Posted by bazza

Half a lap from the other day whilst running the engine in - playing with a 600 hp Mustang.

http://www.youtube.com/watch?v=3eFnBiuQJgA

Bazza,

Looks like fun! The Mustang definitely had some "poke" in the straights.

-Bill

[bazza]

Originally Posted by SVXRide

Bazza,

Looks like fun! The Mustang definitely had some "poke" in the straights.

-Bill

He certainly did. If you look closely in HD mode - you can see everytime on the gas, he is leaving black lines or rubber lol. Think they had an ex V8 supercar engine in it.

[Dessertrunner]

Bazza,
Who would have had the faster lap time you or the Mustang?