EZ-EFI, Can dual throttle bodies be used?

[studio57]

my dual quad kit has arrived and very soon we will dyno it..

anyone used Racepumps efi mec.pumps with these EZ-EFI.. do have one on my 632cid Chevy and it is just fantastic...and would like to have one the hemi as well.

[bluzman2004]

I've heard of the that pump, but have never seen anyone use it on fuel injection before. If it can supply the correct volume of fuel at above the fuel pressure you need. It might work. You will definitely still need a fuel injection style regulator with the vacuum reference port hooked up to the manifold vacuum port on the throttle body. This is the ONLY way that you can maintain the correct fuel pressure differential on the injector.

Good luck with the kit!

[Curby]

Nice set-up!

[studio57]

in future im thinking on install 10/71 blower on top of the engine... any up coming updates coming so i can use my ez-kit with it.
even now i dont why it does not work with blowers if you can addjust the full throttle fuel ratio to like 11.5

[SoCal]

At present, it is designed (parts and strategy) around a 1 bar MAP sensor. So it cannot read above atmospheric pressure.

[TurboNova]

in future im thinking on install 10/71 blower on top of the engine... any up coming updates coming so i can use my ez-kit with it.
even now i dont why it does not work with blowers if you can addjust the full throttle fuel ratio to like 11.5

For something like that why don't you use two of the throttle bodies and an XFI? I think that would be a perfect blower combo.

Part of the EZ efi problem on a blower would be the no timing control. To get the blower to idle well you need the spark idle control, I guess unless you like the surge idle

[studio57]

At present, it is designed (parts and strategy) around a 1 bar MAP sensor. So it cannot read above atmospheric pressure.

My Hummer H2 with Magnacharger has 1bar map sensor and works fine with the blower. Any reason for this? sorry i just dont understand

[studio57]

For something like that why don't you use two of the throttle bodies and an XFI? I think that would be a perfect blower combo.

Part of the EZ efi problem on a blower would be the no timing control. To get the blower to idle well you need the spark idle control, I guess unless you like the surge idle

i all ready have mallory`s digital timing box that does that. and i have the ez dual system and i dont wanna buy a new one.

my old 509 with procharger did have steady 30degree timing , no idle problems, no heat problems didnt take much gas on the street use and did run 11.5 on strip with muflers and street tires.

[TurboNova]

My Hummer H2 with Magnacharger has 1bar map sensor and works fine with the blower. Any reason for this? sorry i just dont understand

The H2 Hummer has a Mass Air Flow sensor and a 1 bar map like most of the LS series engines. Most people are upgrading the operating systems in the stock ecu to read 2 or 3 bar map sensors and running in speed density.

What happens is when you go over 1 bar then the ECU does not know what to do, it can't read any farther. The stock ECU uses a blend of the MAF and MAP for fueling and then when you go WOT there is a power enrichment table that just adds X% of fuel and in open loop only (no O2 correction). Totally different setup than how the EZ EFI works. EZ EFI works by running in closed loop to correct fuel and change the map based on what the O2 sensor sees. If you go off the end of the map then you are risking that the O2 can change the fuel enough compared to the highest 1 bar number and fuel enough for 2 bar worth of air.

[studio57]

The H2 Hummer has a Mass Air Flow sensor and a 1 bar map like most of the LS series engines. Most people are upgrading the operating systems in the stock ecu to read 2 or 3 bar map sensors and running in speed density.

What happens is when you go over 1 bar then the ECU does not know what to do, it can't read any farther. The stock ECU uses a blend of the MAF and MAP for fueling and then when you go WOT there is a power enrichment table that just adds X% of fuel and in open loop only (no O2 correction). Totally different setup than how the EZ EFI works. EZ EFI works by running in closed loop to correct fuel and change the map based on what the O2 sensor sees. If you go off the end of the map then you are risking that the O2 can change the fuel enough compared to the highest 1 bar number and fuel enough for 2 bar worth of air.

Thanks for the information.. any updates coming near future? im not installing it yet but now that i have Ez-efi it would be nice to use it if i do supercharge my 572 Hemi.