I originally had the smc front mount kit with the progressive controller and the flojet pump. I also have a 250 psi fuel pressure gauge/sensor, measuring methanol pressure going into the nozzle.

with the old pump, i was told that 100psi of methanol pressure is pressure.

now i installed the shurflo pump inplace of the flojet pump, as seen in the pictures below,

http://i226.photobucket.com/albums/d...alisf/smc1.jpg

http://i226.photobucket.com/albums/d...alisf/smc2.jpg

The lowest methanol psi i can get is around 170 psi, and if i place around with the controller switches, it can go upto 200+ psi.

Is that too much methanol pressure? what is everyone else getting with the shurflo pumps?

 

The pump pressure will depend on the output signal from the controller to the pump. If you are getting 170psi at injection start, sounds like it might be going full and not progressive.

The higher the pressure the better the atomization will be. Our new pump can deliver up to 250psi.

 

Was replacing the smc flojet to a shurflo pump a straight swap?

I like to try this too but a little worried if the smc controller can handle the extra current draw of the shurflo without frying it. Which shurflo pump is that?


.

 

The Sureflow pump is adjustable. Set your psi. to give you the flow you are looking for. A larger jet will reduce flow. If you want 120# flowing at max and you have 25# of boost set the psi. at 145#. The easy way is to flow it into a bucket for the the test with the nozzel size your system requires.
Todd

 

Most manufacturers will give you a good starting point and flow numbers based off your criteria. The brand and size nozzel is critical. I have been very successful with 80/20 90/10 and 100% meth setups. I didn't find any more performance above 80%. For a high boost set-up I am usually around 30% meth to fuel ratio.
I hope this helps.

Todd

 

170 psi is a lot of pressure and takes a while to build up... Kinda like a big turbo waits for spool. So response is kinda slow which could leave you dry. BUT allow better atomization. Which isnt as critical in a 100% meth kit like yours due to meths low viscosity vs a 50/50 or 100% H20 mixture.

Aquamist HFS-5 kit uses a shurflow pump preset at 130 psi. Great atomization for 50/50 yet plenty to flow above 2000cc a min!

The SMC controller I believe alters the voltage to the pump which can cause slow reaction time and a fulty pump after a while, might look into buying just a Hobb switch and a relay to power the pump. You will only get real precision with a HSV (High Speed Valve) from Aquamist. Acts like a fuel injector but for water/meth!

Good luck buddy lmk if you need anything!

Evan Smith

 

You are correct except the bolded...

A larger jet increases flow but has less effectiveness at atomizing as effectively as the smaller jet at the same pressure. It will still be good though.
Bigger = More.

Evan Smith

 

Don't forget that there is more wear on pump seals and components at that high a pressure.

 

after figuring out what npt sizes i needed, it just put it self together. i just took my old smc pump assembly with me to home depot and spent about 1.5hrs getting the right fittings. i would say, yes it was a simple swap.

the smc controller as an internal fuse, so it will pop before u fry anything inside the controller.

 

well, i was told that these pumps are designed for the higher psi.

 

I did initially see that it would build the pressure slowly, but after playing around with the switches on the smc box, 200 psi is litterally instant. i was extremely happy with the way the car performed. i was able to lean out the afr about 0.5 point and added 2-3 degrees more of timing.

I am seeing higher consumption of meth. I was thinking to upgrade to the M10 nozzle, but now i know the higher psi already gives me more meth.

 

Ya the lag is in milliseconds which is long for cars hard for human eyes to see.

Yes before you had a garden hose now you got a fire hose as far as volume goes for the new pump.

Now see if we can get you into the tens!!!

Evan Smith

 

So is the kit still running with the SMC kit on the shurflo pump swap? Just wondering because that would be a nice upgrade if you could manage the pressure and still keep the progressive control.

 

yes i am still the same setup. it is working flawlessly.
what exactly do you mean by managing the pressure?

 

Thats great news! Please pose the model of pump you are running as there seems to be several.

Just meaning that the pump is still doing a progressive ramp up to make tuning similar as it was with the smaller flowjet pump. Have you tested the turn on and max ramp up pressure, I was just wondering if the pressure increase percentage was more or less than when using the flowjet pump.

Regardless thanks for the info as I was under the impression that the ground logic of the SMC controller wouldn't allow this pump swap. Great info

Next question, does the spray light still work on the controller? If so how do you have it wired, is their a pressure switch on top of the Shurflo pumps?