You guys do know thats just for the fuel pump, not the efi, right?

That might be alright, though the built in ecm kinda scares me - we know how under hood temps can affect electronics. It's just a rebranded Retrotek product.

I'm curious what else Professional Products does because the Retrotek system is nearly $1500.00. How do they cut $1000 off of the price? Now I'd be cautious.

I just found part of it. $512.00 is the basic kit. It does not include a fuel pump, filter, pressure regulator, pressure gauge. That still doesn't add up to $1000.00 to me. It also says that returnless systems will be available in the future on their website and that all current systems need a return line. I wonder what's up with that.

On the Retrotek site, they show a picture with it used on a supercharged engine but it also says that the map sensor is built in. So the assumption would be that it has at least a 2 bar map sensor built in. They don't say.

Aha, learning more. When the installation instructions are opened at Retrotek, Proffessional Products instructions come up. So maybe I have it backwards. In this case, the Retrotek product is a rebranded Proffessional Products part? That will explain some more of the price difference.

And the instructions say that the map sensor is 2.5bar - plenty for street boosted engines.


Lawrenceville, GA

A true bolt on set! No welding required with lambda sensor bung cause it has a gasket and clamps to hold it in place . But I know that works also...

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

I saw this on the JC Witney web site, http://www.jcwhitney.com/powerjection-iii/p2021531.jcwx for $512. N need for fuel return line if application is under 550hp. This really reduces cost. It is obivious Professional Products just copies other products out there, and sells them much cheaper. I wonder if their control module would hold up since they obviously use overseas production facilities.

Buz Mills

Dallas, TX

You can try shutting off one bank like the oems do. Just make sure the lambda is in the bank which is always active.


Lawrenceville, GA

I dont find it anymore so maybe it was a wrong info.



So if we block cylinders 2, 3, 5, 8 to get steady run, we got one major problem. a Lambda-sensor get false readings from air springed cylinders.



I dont know, what it does if we close second bank, but when I first started my motor, I forgot electricity from right side bank, there was no fuel in that side (look how smoke comes from just driver sive at end of video)

http://s188.photobucket.com/albums/z132/Reilukaista/?action=view¤t=BadMushroomExperience-1.flv&newest=1



Four banger Y-Block?


Hyvinkää, FI

Here's an interesting article. I just started reading it.



http://autospeed.com/cms/title_Cylinder-Deactivation-Reborn-Part-1/A_2618/article.html

http://autospeed.com/cms/title_Cylinder-Deactivation-Reborn-Part-2/A_2623/article.html



Google Cylinder deactivation and a lot of stuff comes up.



It looks like the main reason they leave the valves closed is to take advantage of an "air spring". I've been through several articles so far and haven't seen anything stating that leaving the valves to open and close just won't work. If anything, the "air spring" can be used every other time. I wonder if the pressure drop created by such cylinders might disrupt the air flow enough to make the system more inefficient than if it was running on all cylinders. Actually, in your one throat per cylinder setup, that would not be an issue.

An idle air control could be used to allow additional air to the deactivated cylinders to further reduce the pumping loss. since four of your throttle bodies share a common shaft. Maybe run two iacs, one to reduce pumping loss, and one to handle the four active cylinders - it can help with the transition from 8 to 4 cylinders.


Lawrenceville, GA

Ford Powerstroke Diesels used an electronic pedal with a Throttle Position and Idle position sensor built in.



Mark

57 Black Tbird 312/auto

Will the valves overheat? The exhaust valves don't get cooled with fuel and they don't seam to overheat. With no combustion taking place in that cylinder, it seems like the exhaust valve will be cooler. The intake might get hotter than usual but will it be to a point of overheating? I don't think it will get hotter than the coolant temperature. If it's a spike that takes place the moment the fuel is shut off, maybe it can be programed to progressively cut the fuel until the valve temperature stabilizes to the ambient temperature.

I really don't think it would overheat, if it kept opening, any more than it would if it stayed closed. It will probably be cooler if it kept opening just because there will be a constant supply of cool air moving past it.



Lawrenceville, GA

Hmmm... System developer must had worm in his brains, but telescopic intake pipes are still awesome.



I think, MS3 can be programmed to drive stepper motor with engine speed, so we need just few more pipes and two feet bicycle braking cable...



BTW. I seriously thinked to do cylinder deactivation system like Cadillac Northstar, but then I realized the valves will overheat without fuel, so valves must be shut or open and that will be hard job to do to pushrod engines.

Then that idea went to the trashcan.


Hyvinkää, FI