cij911

iTrader: (14)

Ok so I have a basic 9 MR and would like to run 100% Alk or Meth. I am going to be moving to Ca. (with 91 octane) and would like to run 28 psi. So my question is, what nozzle size / configuration should I use? Currently I have an M7 nozzle.

Would it be adequate to use just an M7? Or do I need an M10?

Should I use 2 M7s (one near the TB and one post IC)?

Thanks

cij911

iTrader: (14)

bump for help...

Ralph

iTrader: (19)

My kit came with a M10. I'm currently at 28psi peak on cali 91 octane. Haven't had experience with a M7.

100% Meth.

Evotech8

iTrader: (4)

If your planning to stay with the stock turbo then a M7 will be plenty.

A M10/15 nozzle is ideally for "big turbo" applications.

I run a M7 at 26psi with a 20G-9 on stock injectors.

04AWDTURBOEVO

iTrader: (26)

How many ml's or cc's are the different nossles, m7, m10, m15?

Some kits use different standards, and I want to compare them.
I have a 375 ml and a 625 ml nossles. I think the 375 flows 420 cc,
and the 625 flows around 680 cc's.

Thanks.

cij911

iTrader: (14)

I believe the # represents Gallons / Hr, so an M7 would be 7 gal. / hr. and an M10 would be 10 gal. / hr. I am running a 9MR with some very basic / minor mods, but planning on running 28 psi. Thanks

HmanEVO

iTrader: (5)

Just fyi, the ml to cc conversion is 1 to 1. 1ml equals 1cc. To compare those ml values you gave(375 and 625ml) you need to know at what pressure they achieve that flow rate. For an example, if those nozzles are rated at 100psi, the 625ml nozzle would be the equivalent of a M10 at 100psi. See below.

Here are the flow rates for the M nozzles at 100psi

M7@100psi= 441cc

M10@100psi= 631cc

M15@100psi= 946cc

If you want to figure the gph to cc/min conversion for yourself. You can use this formula.

GPH/.01585 = cc/min

EDIT: Forgot to add that cij911 is correct. The M nozzles are rated in GPH.

SlowCar

iTrader: (4)

1 gph = 63 cc/min

04AWDTURBOEVO

iTrader: (26)

Thank you very much guys.

CIJ911, I am sorry to get in your thread to ask my question.
I guess we both are looking for similar answers. Thanks.

I got the Snow Performance Progressive kit. I had it for months, and now decided to use it.

So I guess the 375 ml Snow Performance jet is equal, or close to the M7 nossle, and the 625 ml from SP is somewhat equal to the M10 one.

I am guessing here, since I have no clue how many psi the SP jets achieve those numbers. But, it looks like it may be a good aproximation.

For my power level, 420 whp on a MustanDyno, I would think I need to run the 625 ml jet, is this a good assumption?
ps. I will be setting my boost around 30 psi.

fromWRXtoEVO

iTrader: (18)

CIJ911,

I have done the testing and got my car tune back to back a few times, stay with the number #7, it is more than plenty.

I went from #7 to #10 and it did not change nothing at all, the number #7 is plenty. I have run as mush as 28psi consistently and sometimes I peaked to 30-31psi and never had any issues mechanically.

My Evo 8 MR always used the stock injectors and I once did very well on torque(364lb/tq on stock Evo 8 turbo,injectors,intercooler,on91oct and on a mustang dyno) using the number #7 from SMC.

Stay with number #7. It is more than ideal for the stock turbo

Carlos

cij911

iTrader: (14)

Carlos -- Thanks a ton! May I ask how you have the progressive flow setup? Do you start spraying at ~10 psi and then full spray / pressure at ~18psi? I am trying to figure out what folks have found works best, given that this setup (SMC) has been used for many years with the Evo. Thanks again!

fromWRXtoEVO

iTrader: (18)

Cij911,

No problem... The set up would directly depend on your mods. My set up was a very fast spool up setup(264/264 cams,3"works o2 housing, stock turbo,stock intercooler and many other bolt ons that would enhance my turbo spool up) so on my car I did start spraying at around 14psi and maxing it at around 18ish but I use to run comfortably 26psi.

The reason I mentioned my mods is because my car was always exceptionally fast on spool up and just with a hair of tough on the gas pedal the car would see great boost effortlessly so I decided to raise the boost/alky engagement to at least 14psi.

I must say I ran for a few weeks at around 28psi but then after going to the dyno a few times I realized that running at 26psi would make basicly the same power(more less 3whp) so I turned the boost down to an optimal 26psi.

I insist you stay with the number #7, don't guess, don't listen to people that don't have first hand experience or go by the word of mouth, listen to people that actually went to a dyno multiple times, got their car tune multiple times, tested/raced the car multiple times at the track and swapped the nozzles multiple times.

It will all depend on your set up. I have a friend that runs two #15 nozzles on the Stealth R/T but is is tune much more agressively and his engine is fully built to accomodate massive boost.

Slowcar(Abner) has been doing tons of research on alcohol systems, TTP engineering also and many other people here but my suggestion is that you focus on people with similar mods and running the same progressive system (I am one of them) but there are many other people like us on this forum that could share their experiences.

I currently have on hand a #5 , a #7 and a #10 and gave away a #15 to a friend of mine for his GT35r Evo.

Best of luck and if you are not satisfied with the #7 you can always jump to a number #10.

Carlos

HmanEVO

iTrader: (5)

I'll add that I had my progressive settings pretty similar to Carlos when I was running the stock turbo. I believe my max setting was around 20psi. That should give you a ball park idea. But like he said, you don't want your turn on point too low. It doesn't take that much throttle/load to build 10psi+ with the stock turbo cruising around. You'll be wasting meth in those circumstances when you don't need it.

As for the nozzle size, again it all depends on your mods and how aggressive you want to get with the tune. I don't see an upgraded fmic in your mods list. The stock fmic can heatsoak pretty quickly with the stock turbo running those boost levels. If you plan on running 26-28psi on 91oct all day, I would probably recommend the M10.

I ran an M7 to start with and not long after I switched to the M10. This was with 93oct of course. I was able to get a little more aggressive with the tune running the M10 and gained a couple mph in the 1/4 over my tune with the M7. If you're paying to have it tuned, better to just have it done once and go with the bigger nozzle from the start. This is just my opinion of course.

cij911

iTrader: (14)

Thanks guys...I'll start with the M7 and 28 psi (peak) and see how it goes...Also, I will take your advice and not start spraying until 12 - 14 psi and then hold peak spray from 20 - 28 psi (set second dial at 20).

My mods are in my signature: O2 housing, TBE, LICP, mod'd airbox w/ HKS Super Hybrid filter, & Walbro FP

I don't have an UICP or FMIC (yet), but may be going that route...