getting rid of secondary injectors?

[klork]

So I am going to be running my engine off of megasquirt. I have a set of 65 lb injectors and it will be easier to run 8 injectors then 16. I know I could figure out a way to run 16 but I am not sure I see the need too. If I run a catch can for the pcv so no oil fumes are going through the intake I shouldn't have an issue with carbon building up on the back side of the valves correct? I am just doing some thinking and wanting to run it past some other people.

[RussMcB]

Are you running the MS3-Pro? If yes, it runs 16 injectors. Maybe you could just contact DIY Tune and get a LT-5 base map from them?

[klork]

running ms3x. A step below pro but might have the same capability. I will have to compare the spec sheets.

[RussMcB]

I can't offer any helpful technical details, but I lent my '91 ZR-1 to DIY Tune and they installed a MS3-Pro and tuned it. I've been driving with it often for a few years. It still has functional secondaries.

[klork]

I am just not sure i see the need for secondary injectors if my primaries are more then large enough for the engine and I eliminate any oil residue with a catch can so the valves dont carbon up. Why add extra cost and complexity?

[RussMcB]

What about when you toss the keys to the young valet parker? :-)

[rkreigh]

Originally Posted by RussMcB

Are you running the MS3-Pro? If yes, it runs 16 injectors. Maybe you could just contact DIY Tune and get a LT-5 base map from them?

it will be easier to run 16 injectors. if you don't, you may have some issues with the back sides of the valves getting cruddy


I don't think you will find it hard to stage injectors


on my tune it runs both injectors at anything above 1%$ tps and throttle response is excellent.

[XfireZ51]

How stock is ur motor? The reason they used secondaries was to control PW at idle, which is small, and yet have enough injector for top end. 65# injectors will be difficult to control for idle unless MS does something else like vary fuel pressure.