The fuel pressure in the rails is significantly different between the 2.7 and 5.2 cars. Thus the injectors are different in order to compensate. Why? I have no friggen clue.
Dave Helms emerges from the sidelines and sets all of us straight with the truth.....way to go Dave! Tim
Ok, so here is the million dollar question: what are the criteria by which to select an injector cleaning house???? Kai
Good question. All I can add to this is that I'll vouch for Russ Collins at RC Engineering too. I did my first set of injectors for my Miata race car with Russ exactly 20 years ago. He also gave me a hand with the car later when I needed higher rate injectors due to the addition of cams/headers/etc. He was already well known in the Honda (CRX/Prelude) road racing community and had long been done with his motorcycle drag racing career. Russ did some Audi/VW 1.8T injectors for me too during the late 90's and I watched him run the before and after flow tests on his bench. Don't know who he has working in the shop now, but I'd still trust Russ personally with any of my parts.
ASK what is done, what is replaced and understand the process. Once you know What it is you are paying for.... make a decision. I am not allowed to speak here about what I am doing and I sure am not going to stick my neck out and suggest a source.... that just leads to me getting blamed when they drop the ball. ""..so spending the extra 8 X $8 = $64 would be wise?"" Only if the expenditure is justified by the quality received. I am not suggesting throwing good money away just for the bragging rights but folks spend BIG money on synthetic oil dumped out after 800 miles and never give it a second thought. Because someone say's these guys or those guys are a few dollars cheaper...... This is the thinking that led us all to where we are today with these cars and is in part the reason we have so many problems with them. I have used most every company I could find at least once because I am fed up with the quality of parts and sublet these days, it's why we are doing what we are regarding making parts. Thankfully I have been able to hang up my injection flow bench (Truely a miserable job), at least for the time being. If history is a teacher, it will come out again because even the best will drop the quality of their final product if all folks are looking for is "Cheap". This is the Engine Management/Fuel System...in a Ferrari, not a Yugo and it is now being fed Non-Flammable Rabbit pee the Feds have given us and is still expected to make Big power yet not melt pistons... its nice to 'want'. Alcohol attracts and holds water, water causes corrosion and the whole mixture of Swill melts fuel hoses and In-Tank rubber components. This just might be an area where you want Quality V. Cheap and asking questions of those doing the work is justified.... Just my thinking on the subject.
Or a big line of Horse Snot...... depends on where you stand on the subject. Folks are Assuming everything is created equal these days which couldn't be further from the truth. Sometimes you get what you pay for but... in this market we all too often see the prices of sub-par services/parts raised to meet market expectations. This is a dangerous trend leading to owners to make uninformed decisions based on hearsay and assumptions. Pay for it now or pay for the results later... you will pay for it. I had an interesting conversation with Brian last evening, both of us ending a day we would rather forget and on this very subject. We are both blessed with the fact we are busy and it allows us to step back for just a moment and analyze what is going on today.... like anyone gives a hoot what two old gray hairs think. Assumptions and a good advertising campaign have won out over logic and reasoning, we have become janitors cleaning up messes after the fact. It's long past time to start asking questions and stop assuming.
Ok, I am clearly not as well versed, heck, not versed at all, when it comes to the technical aspects of our Ferrari's. Is there a minimum of things that should take place? i.e. replace o-rings, clean in xxx, pressure test (???) I think what I am saying is that I don't know what the processes are that are needed/important to do a quality injector cleaning/refurbishing. Good discussion guys. Kai
Well here is what Mr. Injector does. http://www.mrinjector.us/service-procedure.html For just $16 an injector.......that's a pretty doggon good deal. I'm in the process of rebuilding my son's Honda B18, and I'll be sending those injectors to Mr. Injector for testing and cleaning. Looking forward to the Jolly Ranchers.
Had mine done at Mr. Injector. $133 including shipping. 5 days total. Got candy. Flow before: 44,46,46,47,45,46,47,45 Flow after: 47 on all So, flow increase was not that big, but the pattern on four of them was only fair. I'm thinking pattern is probably just as important as flow, since the better the molecularization of the fuel the better the combustion. I was surprised the flow wasn't more compromised by 70k miles. I'll clean them again in another 20 years!
