Twin Turbo EG33 Build - cozykat - Page 8

TomsSVX · #**106** 10-19-2010, 08:24 PM

If she goes with the hydra she can manage the IRIS control solenoid via an aux output. She can make it as simple as RPM control or she can add in other variables like boost pressure, engine temp, throttle percentage, etc... to alter the control of the solenoid. Only thing it cannot do is modulate a percentage of how much the valve is opened or closed because it is a simple on/off solenoid that powers the vacuum diaphragm

Tom

Nevin · #**107** 10-20-2010, 10:13 PM

Couldn't you just dyno with it closed and then again with it opened, then just compare the graphs and make it open at the crossover point? I would assume that one graph would have more hp./less tq. and the other dyno would be slightly opposite?

Even if you didn't have a hydra, you could still easily do this with an MSD window switch.

TomsSVX · #**108** 10-21-2010, 05:05 AM

Im not 100% about this but from what I understand is that the valve is not just about open/closed. It has an inertial effect of velocity when it opens/closes so just leaving it open or closed might not yield the actual effect

Tom

oab_au · #**109** 10-21-2010, 04:28 PM

Quote:

Originally Posted by TomsSVX

Im not 100% about this but from what I understand is that the valve is not just about open/closed. It has an inertial effect of velocity when it opens/closes so just leaving it open or closed might not yield the actual effect

Tom

Yes that is pretty well right. It works on the air speed and inertia, that is developed in the inlet tract, between 2000 and 4000. Thats why we have two humps in the torque curve, the inertia produces the first one and the resonate system provides the second one. It will only work at these rpms as the speed of the air inertia is too slow to work above this engine speed.

Having forced induction makes no difference to the way it works, it is just working with a higher air pressure. If you are using a different ECU, you make it close at 2000 rpm and open at 4000 rpm. It needs to be open below 2000 to prevent too much pulsing in the tract that would upset the idle, and low speed running.

Harvey.

Nevin · #**110** 10-21-2010, 07:32 PM

Well, shivver me timbers. You DO learn something new everyday!

SomethingElse · #**111** 10-23-2010, 01:41 AM

Quote:

Originally Posted by cozykat

In my garage. And yes some progress made, but I'm slow. I was supposed to have everything sealed up this weekend but got side tracked. Breaking down and ordering wiring harness.. Having exhaust and intake manifold coated but I'm fighting myself about the iris and if I should just remove it.

P**sy is awesome?

Johnybeas · #**112** 10-27-2010, 05:54 AM

What all machine work did you have done? can you break down the 870??

Johnybeas · #**113** 01-14-2011, 10:07 AM

bump for updates! quit traveling and going to school n get the car done! gosh! :P

httrdd · #**114** 03-08-2011, 04:53 PM

Bump again. Solid build!

cozykat · #**115** 03-14-2011, 09:51 AM

Thanks!

Yeah. I keep getting distracted by other things. I just need to do valve covers and oil pan then add all the sensors, intake, etc to be done. quite shameful on my part.

thumper_svx · #**116** 03-14-2011, 01:22 PM

Quote:

Originally Posted by cozykat

Thanks!

Yeah. I keep getting distracted by other things. I just need to do valve covers and oil pan then add all the sensors, intake, etc to be done. quite shameful on my part.

Yeah, how dare you think that you might be entitled to a life when there's an SVX left wanting. I'm ashamed of you, Marisa...

torxxx · #**117** 03-30-2011, 01:23 PM

any updates?

Looks like an amazing build, nice to see a female that doesnt mind getting greasy too

Subie-Addict · #**118** 04-28-2011, 02:55 AM

Very interested to see the final cost/parts list so I can steal part numbers and boost my spare engine

and to see if there's any suggestions on further or different upgrades for a build like this. Keep up the good work

BackWoodsBob · #**119** 10-11-2012, 11:07 AM

bumpdates!

cozykat · #**120** 10-23-2012, 09:12 AM

Yeah, I'm a bit slow.

Actually between working (plus overtime) and house fixing.. time has been the one thing I need more of. Was able to clear out garage enough that the SVX can get back in and the engine has a place where I can install all the accessories (intake manifold, sensors, etc) to get this engine done and back in the SVX.

Plus the new side project to fix the broken windshield.. getting someone that can swap windshields without breaking them has me a bit timid about getting it done.

*sigh* I'm just full of excuses...