Stock 1.8 head flow numbers??

[Piledriver]

Sorry I thought those were intake port volumes.

Have the intake port volume numbers by any chance?

Sorry, no, have never measured them.

[Piledriver]

Just freshening a link for the PSI pro stock drag bike dual springs, they are for an OHC app, but the diameter and installed height are ~perfect for a very hipo ACVW, WBX T1 or T4 with up to .700 lift, 1.450 installed height.

Should work with about any cam that you could fit in an ACVW, including rollers.

Part#s are DR1221, DR1222, and DR1223

http://psisprings.com/index.php?option= ... ategorised.

I don't know how long these would last if you were using all .700 lift at >15K as the original app would allow, but they'd likely last just fine with less lift and RPM.

[Type 4 Unleashed]

I have a set of the PSI DR324ML springs, the ML stands for Max Life a process PSI does to extend the life of their springs, and I believe can be done to any of their springs at an extra cost of course.

I went with these because they are close to the stock installed height and install @ [email protected]" with a max lift of .770" and coil bind @.735" , the problem with the other springs depending on how much lift your cam has you run into the problem of running your retainer into your valve guide because you already lost .100" or more of installed height with the other springs, little trick, the installed height is not set in stone so I will increase it to maybe 1.650", it will drop the seat pressure a little but I am not worried about that.

If you go to the Compare items it will list the springs I have: http://psisprings.com/index.php?option= ... Itemid=163

[Piledriver]

I wasn't sure those were the same found previously, but they looked good.

Nice, if you increase installed height max lift goes up same amount.
>.8" lift would be doable, although heads to make that worthwhile are like hens teeth.

[Type 4 Unleashed]

Yea, >.8" lift would be doable, but that's roller cam territory needing seat pressure around 200 and over 600 over the nose. I think that's too much for our motors, with that kind of pressure taking it's toll on rocker studs & cyl studs not to mention pushing the heads off the cyl's. Flat tappets are fine for me.

Actually the DR324ML springs I had picked up for my Turbo Build, and looking at a cam around .600 to .650" lift, I had posted about these springs in camshaft grinds for turbos some time ago, but I was called stupid and an idiot, and I didn't know what I was talking about, I just laughed and let it go. So I'll end up with any where's between .220 to .270" before coil bind and know I will not have any problems.

[Piledriver]

I'm not sure why that would be crazy other than needing huge heads to be worth lifting > .650"
The seat and open pressures of all those spring sets are in the ~same range as the SCAT duals, just have more lift capability.

You'd probably need Pauter heads or similar to make it worth going near .800".

[Type 4 Unleashed]

If I could ever afford Pauter Heads, it would be a complete Pauter Big Block.

The other springs have an open pressure of 450 and I don't think SCAT duels go that high but the K800 I think do, but the 324 springs have an open pressure of 560 pds, which is a little much for flat tappet.

[Piledriver]

If I could ever afford Pauter Heads, it would be a complete Pauter Big Block.

The other springs have an open pressure of 450 and I don't think SCAT duels go that high but the K800 I think do, but the 324 springs have an open pressure of 560 pds, which is a little much for flat tappet.

What I meant was about the same open pressure at similar lifts (~.500)

The typical SCAT/CB springs are nearing coil bind at that point tho, the various PSI springs mentioned all still have a lot of lift headroom, even installed at spec height.

Whens the board getting turned back on?
Its cool that the mods have it all to ourselves at the moment, but I'm missing the rest of the troops.

[raygreenwood]

So you guys got to sit around on the new furniture while they were painting the place?....its nice in here!
Ray

[Piledriver]

So you guys got to sit around on the new furniture while they were painting the place?....its nice in here!
Ray

We were cheaper than tarps to cover the furniture while the painting went on.
The Creech brown and tan will take some adjustment.

I suspect if you had autologin set up its worked for ~about a week, as leather and iguana have posted some as well, it wasn't just mods.

[Bob Brugge]

This is a stock 1.8
0.0500 25.5 39.2 28.00 28.00
0.1000 47.3 67.5 28.00 28.00
0.1500 64.8 85.4 28.00 28.00
0.2000 83.7 93.3 28.00 28.00
0.2500 96.6 107.5 28.00 28.00
0.3000 103.0 120.8 28.00 28.00
0.3500 105.8 133.4 28.00 28.00
0.4000 107.5 144.4 28.00 28.00
0.4500 109.3 153.6 28.00 28.00
0.5000 110.4 161.1 28.00 28.00
0.5500 111.5 165.3 28.00 28.00

This is a stock 2.0 914, though I should point out that it was a bit of an over achiever. Most of the stock 2.0 914 heads I've flowed were closer to 180CFM at .500" lift.

0.0500 34.0 25.0 28.00 28.00
0.1000 61.6 47.5 28.00 28.00
0.1500 89.8 68.1 28.00 28.00
0.2000 117.1 86.5 28.00 28.00
0.2500 133.8 101.5 28.00 28.00
0.3000 145.8 116.3 28.00 28.00
0.3500 159.4 125.9 28.00 28.00
0.4000 171.4 131.4 28.00 28.00
0.4500 180.6 134.3 28.00 28.00
0.5000 187.6 135.7 28.00 28.00
0.5500 192.4 136.8 28.00 28.00

Can someone please explain to a n00b wth this is and means? looks like a column of numbers to me, but how do I read it?

[Piledriver]

Left column is lift in inches.
Next two columns should be Intake/exhaust flow, but the 1.8s I/E numbers are transposed E/I.

The 28 means measured at 28" vacuum (WC)

[dstar5000]

Your valve control problem,is because of spring pressure. N/A the springs have to control the weight of the valve, which is over 100g. But with forced induction, the springs have to deal with the turbo pressure trying to push the int valve open, and more so with a larger 48mm valve, and your springs can't handle it.

Took off the intake tube and it reved nicely till I outflowed my intake. The things you learn by doing..

This proves my point.

Forced Induction doesn't need large ports or valves, and work just as well if you do. Over in Europe, these guys are wild, some are using WEB 277 for turbo cams with Pauter heads.

Even with the valves, your smaller ports will let the Turbo spool faster, and the your springs can't handle a fast spool up either.

What do I think ? Your heads are fine, put some valve springs on, then hold on...

Here's a link to a question I asked about this very thing, I think you will find the info very interesting.

http://www.shoptalkforums.com/viewtopic ... g+pressure

I am getting old, I posted this stuff to your post last year that I just came across, well at least I am consistent on my info...

For me when I do a set of Turbo heads, I will go 46x42, and thanks to Piledriver, I think these springs will be perfect for a Turbo motor, and can stay with stock length valves.

http://psisprings.com/index.php?option= ... view&id=20

[Piledriver]

Unfortunately PSI has cut back drastically on their catalog and doesn't offer those top fuel motorcycle springs except perhaps as custom.

[dstar5000]

NEEDS TO BE PINNED.....

DON