rxrotary2_7

haha! why because I am NEVER by the phone? If someone at the shop tells you I am not here, just leave a message and good time to call you back... that or just email me directly.

bumpstart

actually the error a little higher than that
the 850 and 1000 are the SAME parts , just either end of the scale variance of the batches

so, if going multech
( which appear as the best match of response, pattern, cost and fit without getting stupidly oversize in 1600 )

get them flow matched/ blueprinted as the NORM
and you will skirt there biggest fall down

PS
earlier multechs had a rep for the insulator in the "wet" windings being vulnerable to strong solvents
( apparently improved )
the use of solvent cleaners with them is not recommended
( they are multifuel rated )
- saying that however the plug disk design is apparently self cleaning / deposit resistant compared to pintle types

i recommend the marren due to the drop in rail fit nature
and that they are individually scribed and blueprinted Rochester/ multech

just startn

iTrader: (33)

Damn! that engine is crispy!

PandazRx-7

iTrader: (18)

I run 4 Rochester 1000's for my secondaries with the FJO driver. So far no leaks and no problems...




.

rxrotary2_7

I would beg to differ as an "850" is a 17113743 and a "1000" is a 17113744 scribed right on the top of the injector

drop in fit nature can be obtained very easily and is offered by most places. "drop-in fit" is also subject to what you have. There is no such thing as a drop in fit for a FD as they came side feed...

2a+RoN

The rochesters are one of the worst injectors available. The Yaw 1000's have the best spray pattern out of any 1000 and are incredibly linear. I'm actually running 4 on my car non-staged and it has a surprisingly very smooth idle.

mono4lamar

iTrader: (32)

Anyone want to send their Yaw Power injectors in to Keith for a flow session? I'll pay your bill. I just want to see the pattern for myself plus it will benefit us all seeing the data. I think this thread could actually be something productive!

mono4lamar

iTrader: (32)

From the actual flow patters I've seen of them they're among the best spray pattern out there. What have you seen that would make them the worst? A couple guys have chimed in that they've been using them for years with no problems. Coupled with those testimonies and the actual spray pattern I've seen I don't see how they could be rated low by any means. I'm not arguing just trying to get the facts strait.

rxrotary2_7

I would have to agree, but on EVERY size, not just the 1000's. And in many aspects, not just spray pattern.

There are a few local honda tuners that will ONLY use a rochester... for what reason, I have no clue. They claim they perform the best and can idle the best... I would tend to believe that maybe they have more base maps to start from using this injector and cant "really" tune a car, so they are using their best starting point??? who knows...

Lance, it is kinda hard to tell from that video with the glare, but the rochesters are not the best pattern. when I get a few free minutes I will try to take a more detailed video to show you. A lot of pooling happens with them causing large droplets to form and adding fuel that is not atomized very well. Not saying rochesters wont work... they have for many years, even though we sell them every day, I am always honest, and in all honesty, they are not the best choice.

rxrotary2_7

You dont have to pay. I will do it for free to anyone that wants to send them in. I have yet to see one and would love to. Maybe I will call Glen this week and buy one or see about buying them in bulk to sell... I do need to source a new alternative to the rochesters that I dont like...

2a+RoN

Call glen or call our shop directly at 602-218-5369

If you guys want data, I have plenty of that. We do a dynamic flow test with each injector then match based on flow and also dead times. I would compare the atomization of the yaw 1000's to a 60lb siemens mototron, but they can actually linearly flow less at the same pressure..

2a+RoN

Yeah the rochester have quite large droplets on every size, but the motors are horrible as well. After flowing a lot of newer denso and bosch injectors, I cringe when I flow a rochester in the bench.

mono4lamar

iTrader: (32)

Aaron, can you post a video of a flow test?

2a+RoN

Yeah, I just took some vids, but its off my phone though so don't expect too high of quality... It shows the point though. I'll try to get some of the rochesters today also for a comparison on our bench.

Silverfc88

iTrader: (7)

How much are the Yaw 1000's going for?

AnthonyNYC

iTrader: (3)

Keith,

How do you think the 1600's did on the flow test?

Anthony

rxrotary2_7

Spray pattern wise they are great

rxrotary2_7

I am only posting my initial comments on these. I have never used them in a car, and nothing said is meant to offend anyone in any way.

Just finished a flow test on the yawpower injectors a forum member sent in. As suspected these are modified injectors and were not made to flow 1000cc. They DO however flow 1000cc like advertised unlike most (venom/TLF) modified injectors but this was expected the minute I saw them knowing how the modification was done. The important part number were scratched off of the injectors to let me know exactly what they came from but I have it narrowed down to 3 "suspects" but will not reveal that info to protect yawpower. (dont PM me and ask how or what injector it is.. im not going to tell you, you will be ignored)

I have to say they did do a really nice job coming up with an alternative to the multec 95lb ers, especially with the nice cap to extend the height to have the same o-ring to o-ring size. Very nice idea.

Spray pattern wise, they do loose some integrity after being modified, just as other injectors do. The outward spray is caused by the fuel basically "bouncing" off of each other coming from all angles (kinda hard to describe... I will take some still shots tomorrow to analyze and maybe comment further) with a strong stream in the middle. Unfortunately I cant use this injector on a rig I have set up on another bench to give volume % and spray degree.

In the video you cant really see it, but because of the modification and the manner in which the fuel exits the orifice, a fluctuation in pressure causes the spray pattern to shift from side to side. You can kinda make out the variation of the pattern between the two identical injectors though.. The one on the left was a little more "wild" then the right. This seems to happen in the higher ms ranges where down low they seem to be a little more "even".

Overall though, I like them. Nice fit for those needing high imp 1000cc injectors.

Without trying them out, I also see they are a great option to the design of the GZ intake manifold and the placement of primary injector (when using top feed primary) to the additional 2 in the GZ manifold just because of the thin nature of the injector.

and the video can be seen here: http://www.youtube.com/watch?v=KNvf__BA6mY

Video is only a static flow. When I get a minute I will post a dynamic video of the flow.

2a+RoN

Thanks for posting the vid Keith and no offense taken.

The spray pattern of these in comparison to other injectors of all sizes is just OK IMO, definitely not as good as an unmodified of the same injector. However, in comparison to other injectors in this size, the atomization is quite a bit better.. I have not seen the fluctuations that you mention in our bench as pressure is rock solid w/ very minimal fluctuations. The video I took, while being of much lesser quality, gives a much better idea of the atomization itself as we have a strobotach to slow down the motion and show individual droplets. I will see if I can borrow glen's video camera and get some decent footage. I will also try to replicate the fluctuations on the bench tomorrow and see it for myself.

We have had many many customers come tell us how huge of a difference these injectors have made in their cars, both in driveability and even a slight power advantage as well.

scotty305

iTrader: (2)

Aaron,

According to a PDF on www.azrotaryrockets.com , the YawPower injectors are available in 600cc, 680, 780, and 1000cc flow rates. Do the 780cc injectors retain an OEM spray pattern, or are they modified as well?


Strobotach is a brilliant idea, by the way.

-s-

rxrotary2_7

:thumbsup:

From initial results I saw, I would agree, but then again we were already in agreement that the multec 1000's were not the best. I believe you can only go "up" from there. On the flip side as already stated, its nice to have a saturated option. I am not the biggest fan of the ev6/USCar clips (just personal preference). For the end user, it may also be a little more difficult to source and a little more $ to replace their Denso clips. We do have adapters that would allow a customer to "jump" a denso to an EV6 without cutting the harness, but that is even more $.


same here with being solid, I honestly dont think I would have noticed this if I didnt happen to pick an open bench where one of the guys was working on all day and before he left drained more fluid to test his specific gravity of the test fluid and did not refill ... So fluid was on the low side causing some fluctuations in the pressure. After noticing, I simply "amplified" the fluctuations to get a better look.


That would be cool. i am going to do the same this weekend as the guy who sent these in is giving me the weekend to mess around some more. I dont have much spare time this weekend but will make time Sunday to go to the shop and i will try them with our stroboscope and do some other messing around. Maybe you can post your vid too

cool cool

I am sure, especially if prior to these they were running a P&H injector with a Band-Aid (resistor)

I saw the flow stats that come with the injectors as well. I didnt go through it to much but, Nice use of VisulBasics. Looks nice

mono4lamar

iTrader: (32)

Any updates???

2a+RoN

Sorry, have been busy with school and haven't had a chance to borrow a decent camera yet and for some reason my laptop doesn't want to recognize the videos off of my phone..

Scotty, the 780's are also modified and spray pattern is similar, maybe slightly worse than the 1000's.

Also, I mentioned the wandering spray pattern to Paul and he said he noticed it even on the unmodified injectors as well, so I don't think it is a problem caused by the modification.

2a+RoN

I'm not really the biggest fan of the UScar connector either.. However, we did source a pretty inexpensive adapter to an ev1(standard square, err... rectangular) to UScar which makes it a little simpler.

rxrotary2_7

yeah, ive been swamped as well. never got around to doing any further testing and needed to get the injector back to their owner.
not sure what that wandering pattern is all about.. i figured out the injectors used and will try it on them before modification just to see a "pre" scenario..


yeah, we made adapters at a reasonable price from Denso oval, EV1, Honda OBD2, and toyota to fit EV6 too.