ECUtune Camshafts

longassname · #1 01-01-2007, 10:18 PM

There's already been some discussion of this project in other threads but it's time to make our own thread and consolidate the information on the camshafts I am developing.

I'm developing a matched set of camshafts, valve springs, and valves. I'll be posting information on the status of the project in this thread.

longassname · #2 01-01-2007, 10:20 PM

(copied and pasted from my post last week in another thread)

I've been busy with my transmission project as of late but I was able to get to taking the valve spring measurements today so that I can get the valves and cams ordered.

For the stock valves I got an installed height of 1.12 for the exhaust and 1.10 for the intake.

For the stock valve springs I got a seat pressure of 40lbs and an open pressure of 104lbs (compressed to .79).

We can reduce our base circle on our cams 2mm without cutting into the fiillets and that will give us the room we want to increase lift and duration. I'm going to get valves made 2mm longer than stock to match so I measured my seat pressure at 1.20" The combination of the stock outer springs with the new inner springs work perfectly. The seat pressure at 1.20" is 60lbs. Putting us in the 60-66 lbs range for both intake and exhaust--perfect.

The same combination compressed to 0.820" is 160 lbs. So that's our pressure at 9.4mm actual lift which is a little higher than what we'll see with 9.6mm on the lobe. Figure our intake open tensions will be a little on the shy side of 155 lbs and our exhaust open tensions a little over 155 lbs--perfect.

Coilbind height for this combination is .725" giving us .465 free travel subtract 60 thousands standard extra clearance that gives us .405 which equals 10.3mm safe lift (comfortably more than we'll be getting out of our cams).

Budfreak · #3 01-01-2007, 11:52 PM

subscribe

mikecg · #4 01-02-2007, 06:35 PM

You've got my attention. (Savings at $700 in climbing)

Alcyone Lunacy · #5 01-02-2007, 06:49 PM

Once you have them installed let us know how well this upgrade works; sounds great though! Put me down for some in the long run if they have no ill side effects.

#6 01-02-2007, 06:51 PM

Could some one explain in simpler terms how this benifits?

James

TomsSVX · #7 01-26-2007, 03:07 PM

Just in case anyone wasn't following the "Boom" thread. The journal sizes on the crankshafts for the EG33 are the same as the 2.0l turbo, 2.2l, and the 2.5 turbo motors. This means we can use the Con rods either from these motors or their aftermarket rods as well. i personally will be going with a set of Eagle H-beam rods to compliment the StageIII pistons and Clevite bearings

Tom

Edit: Just make sure the height of the rod is the same... 5.137"

NeedForSpeed · #8 01-26-2007, 07:12 PM

That's correct, those rods and bearings are compatible. The Eagles are a good choice for FI.

Quote:

Originally Posted by TomsSVX

Just in case anyone wasn't following the "Boom" thread. The journal sizes on the crankshafts for the EG33 are the same as the 2.0l turbo, 2.2l, and the 2.5 turbo motors. This means we can use the Con rods either from these motors or their aftermarket rods as well. i personally will be going with a set of Eagle H-beam rods to compliment the StageIII pistons and Clevite bearings

Tom

Edit: Just make sure the height of the rod is the same... 5.137"

cdigerlando · #9 01-26-2007, 07:23 PM

Quote:

Originally Posted by TomsSVX

Just in case anyone wasn't following the "Boom" thread. The journal sizes on the crankshafts for the EG33 are the same as the 2.0l turbo, 2.2l, and the 2.5 turbo motors. This means we can use the Con rods either from these motors or their aftermarket rods as well. i personally will be going with a set of Eagle H-beam rods to compliment the StageIII pistons and Clevite bearings

Tom

Edit: Just make sure the height of the rod is the same... 5.137"

Are you building the bottom end yourself?

TomsSVX · #10 01-27-2007, 07:54 AM

Yes, I will probobly send the block out for honing but thats about it. Not my first walk in the park

Tom

cdigerlando · #11 01-27-2007, 08:31 AM

What about the bearings? Got a press?

TomsSVX · #12 01-27-2007, 01:07 PM

What bearings need to be pressed?? The pins are held by circlips not pressed in. THe pin bearings "should" come pressed into the rods

But in case I do have to press them... I do have a press

Tom

TomsSVX · #13 02-19-2007, 05:02 PM

hey mike... wanted to make sure you got the payment. i sent it last night... should be for the pistons and rods. Also I wanted to put this pic of the block up so you could get a better idea of the deck plates

tom

sicksubie · #14 02-19-2007, 05:39 PM

What will the availability of the pistons, rods, valvetrain components, etc. down the line? I am in college now and cash does not flow very swiftly. I really love my SVX's and really hope that this summer ( I graduate next fall) and next spring when money will be more available that I can still get these components.

TomsSVX · #15 02-19-2007, 10:26 PM

you will def. be able to get the pistons and rods. Pistons are going to be in production after the first run but they will cost more than they do now. You shouldn't have a problem convincing Eagle to make you a set of 6 rods. The cams and whatnot may not be, so if you can scrape together the money now, I would suggest setting them aside

Tom