Hi Team,

Quick question... my air temps are running 140 + on my quarter mile pulls. I opted for water/meth on my procharger for a few reasons. It's my understanding that a blow through throttle body benefits from cooling from mixing air and fuel. secondly water meth should help cool the air prior. My remote tuner is pulling timing once I hit 140 MAT. My thought is that we should be seeing more cooling after the throttle body, and the bottom of the intake runner. With that said, I can't find anything online with this data to prove it (specific to throttle body EFI at least). I'm tempted to pull the intake and put my own probe in the runner so I can see the difference in temps. However, I wanted to see if you guys have thoughts on it. My remote tuner is saying that because the sniper is under pressure, the cooling is not as effective as a carbonated low pressure environment. Anyone have data here to support either way? (I found a youtube video of somebody running E85 on a carb and the air temps were cut in half from throttle body to bottom of plenum)

Hopefully this isn't a dumb question. I'm new to this world of tuning with EFI and boost. However my car is not pulling like it should at the big end. I feel that my Edelbrock RPM (CNC ported) heads are my limiting factor. I did not build the engine for boost originally. Either way, having timing pulled, and high air temps is also not helping.

Thank you

If they are applicable, there are meth injection threads over on Hellcats.org. The one take-away that I got from the posts is that the Hellcat guys don't run meth injection much because they are afraid of a delivery failure resulting in a meltdown. They (along with Dodge) concentrate on bringing in outside air and cooling it with the chiller. Which is basically the A/C system cooling the intercooler. Much more complicated, but considered to be dependable. Then they insulate the blower intake from the heads. Etc, etc, etc.

Can't you at least get ambient temp air to the engine?

I would ditch the water/meth in favor of an intercooler if IAT is your concern.

Call The Super Charger Store and talk with them.....They swear by the water meth kits, I have a friend locally that was running one and said it didn't help at all and switched over to E85 so he could boost as much as he wanted. I also have a Sniper and I am curious what you find out.

Thanks Team - I agree that with modern injection systems the water meth is not delivered to all cylinders in a uniform fashion. Mainly because the runners are not designed to transfer a wet mixture being port injection. ( I think). Where as the single plane intake is designed exactly for that... Supercharger store has provided me with all sorts of cooling data, but I'm not seeing that in my own system. (It's where I bought the kit from). I do not have much room in the engine bay. It's an e body Cuda. I'd love an intercooler, but not sure how I can accomplish it, without 5 grand of custom fab work, and making getting to plugs, and belts even more of a pain in the ***. If anyone has a procharger big block e body, that is intercooled. I'll gladly take ideas. I found a few pics online. (my brake booster and master cylinder eat up a lot of real estate for the air cleaner, so fresh air is tough. I cut opened up the fake vents on the hood, but I'm guessing that not too much fresh air is being forced in there.

Then why dont you put direct port water injection like the nitrous guys use........

BillR1212- I am not running a Sniper, but am running a Holley throttle body with multiport ran by HP EFI with Holley's water methanol kit. I have water methanol injection nozzle in the carb hat and it works well. I have had an instance where the injection did not come on and I think I saw similar temps of around 140° F, but typically see high 90s°- 103°F during a 1/4" mile pass.

Looks like plenty of room for an air/air in front of the radiator, or mount an air/water anywhere. If you can do any fab work it wouldn't be expensive.

Wow - Those are good temps. Per the supercharger store, I'm running my water/meth before the blower. Should I change it to post blower?

You're correct, there is room for air to air, it's just the piping to get it there. I'm not a fabricator sadly. It would likely be an expensive job. In theory the water meth should work for me.

I have looked into lowering the IAT on my roots blown HEMI. W/M is supposed to be good for 50/60* I went with N2O that comes out of the bottle @ 130* and hope to see 100* decrease in IAT. Supposedly 135* or better is ideal.

Any time you compress air you will heat it up, I've seen 130 IAT on a pump gas Roots blown with 7.5 lbs. of boost at 7300 RPM making 924 HP , that motor had a Littlefield 10-71 blower with two carb shop 1050 CFM Dominator blower carbs on it, it was 12% under driven for those tests using 91 octane CA pump swill back in 2001, we switch the pulleys around to get 13% over drive and got 12.0 lbs. of pressure at 6500 RPM making 1027 HP when the motor started going into detonation on 110 octane race gas with 190 F IAT
Hot air expands, especially when compressed, and that leans the motor out. Cooling the intake air will make more power based on more air and fuel getting into the motor which will make more power
Good luck on this , you can fix it

I used a Snow kit on a 440-6 car, it worked great, not sure why it wouldn't work on a supercharged car. You can place the nozzles were ever you like, or just use a plate or a combo of both. They make various kit specifically for boosted applications.

Cool....can you post pictures of the nozzle set-up on your 6 pack and install, please.