RageRace

Whats up guys, heres a question for ya': What do you think of spraying the FMIC with NOS. My buddy set up the Pettit drag car awile ago(when it actually ran and was FAST,9.8et) and he sprayed the IC and basically froze it before the line. A lot of Skylines, Silvias, Supras especially in Japan use this method too(Its the coil on the front of thier IC) It makes sense to me that by freezing it or even just cooling it it will have a tremendous effect on performance. What do you guys think?
JT

2 hott

iTrader: (4)

I was lookin into getting the NX N-tercooler, but I have decided to spend my money on a Water Injection system. From what I have read it will yeild samer and more consistant results. It will also be cheaper for some water than Nitrous or CO2.

swoop

Why not spray the N2O into the intake. Make real power. Only reason to spray it on the intercooler is because rule only allow 1 power adder, Turbo, Supercharger, or N2O.

Badog

...yeah spray it INTO the intercooler. Now of course get that next engine ready 'casue we have forgot to TUNE for that spray!

Spraying on the exterior of the IC. Cool. But why not use CO2 which only gives up about 75F in temperature differential...still well under -100F.

Hot air intake + Nitrous Oxide spray onto a FMIC or SMIC WILL = ingestion into the engine. I know this for a fact.

Freezing the IC before a 1/4 mile run or a dyno run is smart. Trying to freeze it during is a little funny, if you've tried it. Great for bringing terror to the local blvd.

Regards,
Tony

RageRace

Yea i was only thinking of spraying it BEFORE i made a run, another thought was to hook up some sort of tubing inbetween the IC and radiator and to have ports on both sides so that i could spray them both while im at idle at stoplights or before i make a run. Wouldnt this not only be benificial to cooling the IC and turbo but also by dropping the radiators temp wouldnt this help cool the engine? Again i only am thinking of doing it at a standstill not while in motion.

TailHappy

Careful doing this. There was a thread a while back where someone tried this while on a dyno so that they could verify the results. Popped their motor. Bottom line is that you supercool the intercooler much faster than the sluggish stock Air Temp Sensor can react to, and since a colder air charge needs more fuel, the engine leans out too much and pops.

Badog

Sounds familiar

RageRace

Badog this happened to you?

PvillKnight7

iTrader: (16)

Tailhappy- Would a stand-alone system, like the E6K, be able to react fast enough to the temperature change and provide the required fuel? I know they use more accurate sensors...

Another idea to safely run an intercooler cooler...waht about replacing that little stock air temp. sensor on the intake with a GM one like the stand-alone systems run? Would a GM sensor be compatable with the stock ECU and really change the time it takes for the ECU to register the intake temp change??

Thanks,
Ryan

mjw

iTrader: (1)

Why not just run water injection? More reliable, safer, yields similar results, can be used all the time, cheaper to refill (almost free).

RageRace

Im going to run water injection too. I was thinking of this becuase its so f***ing hot in S. Fl. I thought that when daily driving and sitting in 90F weather WI wouldnt do a tremendous job, becuase the WI comes on at a preset boost level(I thought??, 5/7 psi whatever), that doesnt help when your sitting or going 10mph in the afternoon. I was thinking that by spraying the IC/radiator i could keep temps down while just doing daily driving, or when taking the 7 on long drives where i usually pull over to let the car cool every once in a while. What do you guys think of this.

RageRace

Has anyone ever tried or thought about this? How about comments on spraying the Fluidyne too?

Badog

I was "helping" holding the bottle onto the FMIC while it was on the dyno. I'll let the guilt party join in on the fun if he so chooses.

RageRace

Badog has anyone you know of sprayed the radiator?

Badog

Nope.

But I don't see much immediate gain of that. With a cooler intake charge you will get more HP. With a cooler engine temp you get the same HP. You also risk OVER cooling the engine.

Tony

mjw

iTrader: (1)

Spraying the radiator with NO2 seems like a bad idea, first because it is a total waste of nitrous and won't help that much unless you keep spraying it for a while, and second because if you need to do that to prevent your car from overheating something else is wrong with your car. If you are concerned about overheating in traffic/stoplights do the fan mod (I assume you have), drill a couple of holes in your thermostat, and get a vented hood. I would think a nice vented hood like the Mazdaspeed would do a lot in allowing the hot engine bay air to escape both in town and at speed.

PvillKnight7

iTrader: (16)

What about spraying the intercooler with CO2? I am going to make up a spray rail for a bottle I found but like someone has mentioned, the RX-7 ECU might not be able to react fast enough and supply the required fuel. I know there is some truth in this bacause I have read about it on the DSM forums. Thoses guys run side mounts with Intercooler coolers spraying CO2. So will replacing the stock intake temp sensor with a larger more accurate one like a GM one work with the stock ECU or what about using a stand-alone?

Thanks
Ryan

XSTransAm

Here at my work, we have a Dyno... Never had any RX7 on it except mine... But I have seen in person a Subaru WRX use the Ntercooler kit (during a dyno run) It made about a 20 WHP difference... and thats on a AWD car... Not saying it would or wouldent do this on a RX7... just trying to offer up some real numbers. I agree with the problem of nitrous costing too much to waste into the atmosphere... but I have heard of C02 being much more prone to explosion when left in a car in the heat.

mjw

iTrader: (1)

Using a stand alone system that uses it's own sensor may help the problem, I can't comment much on the stock sensor's accuracy. The biggest problem with the stock setup is the location of the sensor itself right underneath the intake manifold, aluminum conducts heat well so it ends up being stuck in a big heat sink. Relocating the sensor to the elbow or IC piping between the IC and throttle body seems the only real solution, otherwise like was mentioned above you are ingesting some very cold air before the ECU even knows what is happening.

RageRace

Ok i have a CF vented hood, PWR, and custom FMIC, also on the verge of doing water injection,and have the fan mod. I definetly am going to spray the IC maybe Co2 maybe N2O i dont know yet for the power benefit, i was just curious about cooling the engine by cooling the radiator(if youve ever been to Miami on a 95F day and moved at max of 5mph in traffic for over an hour 1/2 than you know what im talking about), NOT FOR POWER but to try to avoid heat soak. Again NOT FOR POWER but just to cool the radiator, any comments? Thanks for the help bros!

mjw

iTrader: (1)

I understand you don't want to use it for power, and I completely understand the heat thing. I get stuck in traffic all the time in LA and it can be anything but cool here, we don't have the humidity like you do there, but even in 100 degree weather as long as my fans are on I am fine.. and I have a stock hood. If anything I have more trouble keeping the car cool at speed w/boost when it is hot, the car is fine when it is slow or stopped. There are lots of forum members in FL so maybe one of them can relate their experience, anyone? I still think that if you have cooling issues something is wrong with your system, especially with an upgraded radiator and a vented hood.. fmic doesn't affect anything in traffic.

RageRace

I dont have any cooling issues "yet"- knock on wood, and i should be ok, i was just curious if anyone has done it before. Thanks for the reply

RageRace

I dont have any cooling issues "yet"- knock on wood, and i should be ok, i was just curious if anyone has done it before and had any good/bad things to say. Thanks for the reply

TailHappy

It totally depends on the sensor that comes with the kit. Unfortunately I'm a PFC man and I know nothing about the E6K. I've been keeping up with the Air Temp Sensor thread that's mostly moved to the Datalogit forum at this point, and the bottom line is that not too many people have experimented yet. Basically you're on your own. However, that being said, I would expect that there's a good chance that a significant and abrupt change in temperature isn't going to be picked up adequately by any sensor or computer.

PvillKnight7

iTrader: (16)

Cool, Then I'm going to start testing spraying CO2 once I can get car running again. Just to clear things up, Im not going to spray while driving. That doesnt sound safe at all. The intercooler coller is just to help eliminate heat soak on the intercooler...like after driving an hour to the nearest drag strip...

Ryan