The FCV-2000 comes with 3 jet sizes ( .050, .040, .030) I needed a smaller jet like a .028 or even a .026. Clutchmasters doesnt make smaller jets, I refuse to throw $180 down the drain so here is what I came up with.



Grinded the nitrous jet a little bit to about (4.25mm) then threaded that sucker in.

Now I can order whatever size jet I need.

 

Is the .030 that much of a difference for drag racing. I mean that's what I was planning to use for my FD?

 

.026 is about 75% of the area of the .030"

 

With the .030 I feel that the car is leaving hard of the line. With the .050 I broke an axle.

 

What are these used for to slip the clutch off the line ?

Are these the same as a Tilton I think they are called?

 

Yes

It does the same as the Tilton unit, but with this one you don't have to bleed the line every time you change the jets.

 

Oh cool. Does it come as a kit with slave and lines?

 

You get the flow control and 3 jets.

 

I've been toying with the idea of using a one way needle valve as a flow control. They limit flow in one direction and allow free flow in the other direction. Also, they have a dial so no orifices. Here's a link to the McMaster page:

http://www.mcmaster.com/#flow-contro...valves/=qpdu5e

 

You can't just slap that on the line because it will slip the cluch every time you shift. In order to use that valve you need to incorporate a line lock so it bypasses the valve after lunching.

 

Yeah, I thought about that. An N/O hydraulics solenoid, 2 tees and that valve should be everything you'd need. But it wouldnt be as pretty and it'd be more work.

Doesn't the FCV-2000 work every time you push the clutch?

 

No

 

You sure? How does it differentiate between dropping the clutch during a launch and dropping the clutch between shifts, are there electronics built in or something? I thought it was exactly like the Tilton, which also slips during shifts unless you plumb in a bypass solenoid.

 

^^That's my understanding, as well. It's a static assembly as far as I can see.

 

If thats the case why would I spend $180 on a tilton or fcv2000 vs $30 for a nitrous jet and some and a couple of AN fittings ?

 

https://www.rx7club.com/rotary-drag-...-952871/page2/

I think it is better discussed in the link above...

 

Because it only acts on clutch engagement, not on disengagement unlike a simple inline orifice (it incorporates a one way valve). But it does not differentiate between launch and shifts, just like the tilton, without a built in bypass.

 

My understanding how the tilton valve works. When peddle is pushed to the floor then released the valve is working. slowing down the clutch engagement.
But during fast gear changes your not pressing the clutch peddle all the way to the floor and quick enough were the valve is not working. If you look and the diagram on there web site you'll see a small spring. That spring pressure is very light and when shifting fast the clutch returns before the springs has a chance to restrict fluid. Now if you do pres the clutch all the way to the floor during gear changes then yes the valve with restrict fluid flow.
CLutchmasters one should have something similar inside it. Can't see me slipping my clutch every gear change at the track. That would destroy a clutch quick.
Just my opinion.

I've broken at least 7 stock turbo transmissions. I do have a flow control valve, but it only works when launching the car. Not Tilton or clutchmaster, home made one. Never broke one during shifting. Only under power above 7000 rpms.