Problem after installing 17# injectors

[mpowerful]

Without modified chambers? Without modified manifold (atleast not at intake inlet)? Whats the spray angle on those? Batch fire? You spraying the walls?

Show me the research you based your choice on or i can send you a nice set of single pintle units to replace those modern injectors on yours.

With that being said ive had gen 3 bosches on the flow bench enough to compare them reliably to a single pisser unit. The multi disc type units will suspend a fine gas above anything they spray on even on batch fire where there is latency. Cant say the same for single pintle design. Not to mention the spray angle on the two types i use for an m20 is 15° so essentially you arent dusting the walls. Anyway. Its a moot point. I can talk till im blue in the face and its the same everytime with the opinion by many that unless your m20 is heavily modified there is no need to change the injectors. I happen to disagree with that.

[digger]

Without modified chambers? Without modified manifold (atleast not at intake inlet)? Whats the spray angle on those? Batch fire? You spraying the walls?

Show me the research you based your choice on or i can send you a nice set of single pintle units to replace those modern injectors on yours.

With that being said ive had gen 3 bosches on the flow bench enough to compare them reliably to a single pisser unit. The multi disc type units will suspend a fine gas above anything they spray on even on batch fire where there is latency. Cant say the same for single pintle design. Not to mention the spray angle on the two types i use for an m20 is 15° so essentially you arent dusting the walls. Anyway. Its a moot point. I can talk till im blue in the face and its the same everytime with the opinion by many that unless your m20 is heavily modified there is no need to change the injectors. I happen to disagree with that.

i just bought what was readily available, I told the guys at fiveo what I wanted and they told me the ones they recommend nothing more scientific than that.

im still using batch fire and dizzy contemplating some sort of sequential arrangement soon........ what single pintles did you have in mind exactly?

send me a free set that won’t require huge change to the tune and I can test them out on the chassis dyno at my test cost (you will get them back if they don’t work and If they do ill buy them) so we will see if there is any WOT power to be gained or lost.

I have a MM head with fandangle smoke and mirrors surface turbulence finish and a basic port job.

i retain the spraying on the valve as without testing i didnt think deviating was wise and the theory that the hot valve vaporizes the fuel better than the cooler port wall seemed to make sense and many OEM do it. If I wanted a different injection type I would use a staged injection with another upstream set.

i did spend alot of time with the dbilas manifold to straighten up the injector angle with respect to port as a well respect engine builder who does nothing other than test things on an engine dyno has said this is a benefit.

The dbilas aims at the short side apex or slightly before this even and to fix this only the slimer plastic body injectors physically fit due to the casting shape and that’s why I switched to the red devils earlier than I planned.

i have since ditched the dbilas but my new manifold which was a prototype version from RHD meant i needed to make the injector support bracket and i made sure the alignment angle was retained

Where is your controlled testing that shows that what you perceive as better spray pattern on a flow bench actually translating into producing more power or some other benefit on a running engine?

[mpowerful]

You have your mind made up about what I have to say, and Ithere is no need in me rehashing thousands of documents worth of data so I will simply instruct you to google "bosch ev1 vs ev6".

[digger]

You have your mind made up about what I have to say, and Ithere is no need in me rehashing thousands of documents worth of data so I will simply instruct you to google "bosch ev1 vs ev6".

we are getting off track....

you can of course get a modern injector in the stock flow rate which is what i did when i was stock when my injectors were giving problems......personally i wouldn't be changing injectors from a good stock set to 17lb or 19lb unless the mass flow through the engine warranted it.