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Topic Review (Newest First)
08-13-2019 07:47 PM
Pupsvette76 That looks awesome. There is no way to go pre turbo because there is no pipe before the turbo. I already own a snow kit, but I do want to pick up a dual nozzle kit and a solenoid and check valve so I can move the tank to the back of the car
08-13-2019 06:32 PM
64nailhead If you going to buy a kit, i.e. Snow Performance, Devil's Own, Cool Mist, etc., and follow the directions. In front of the throttle plates is usually easier. But for big power, which you are making IMO, put a small nozzle pre-turbo and a larger in front of the throttle plates.

I've been using a Snow Performance kit that has worked flawlessly into it's 3rd summer. It can easily handle 15 gallons per hour and they say it will handle 20 on a single pump. I run both nozzle pre-throttle plate.
08-13-2019 04:13 PM
Pupsvette76 Would you guys suggest putting the water injection nozzle before the throttle body in the carb hat or in the plenum of the intake manifold directly below the throttle body. Or even perhaps both.
08-13-2019 09:12 AM
64nailhead
Quote:
Originally Posted by Pupsvette76 View Post
So I was going through my data log and saw coolant temps got pretty warm by the end of the run as well around 205degrees so that may be a contributing factor since the iat sensor is in the back of the manifold below the throttle body. So I changed from a regular thermostat to a restrictor plate.
205 is not hot IMO, but I'd recommend against the restrictor. If you're making 6-800HP and only climbing to 205 at the end of a 1/4 in a street legal car, then I'd say you've got yourself a well designed cooling system.

If you have a window washer pump and reservoir, a quick way to see what's what is it to install a makeshift nozzle in to air cleaner and let that pump inject pre-compressor. It will not blast tons of washer fluid in, but I'll bet you'll see at 50 degrees lower.
08-12-2019 10:40 PM
Pupsvette76 So I was going through my data log and saw coolant temps got pretty warm by the end of the run as well around 205degrees so that may be a contributing factor since the iat sensor is in the back of the manifold below the throttle body. So I changed from a regular thermostat to a restrictor plate.
08-10-2019 06:05 PM
Pupsvette76 I don’t have much room for the packaging of larger pipe all through the system. It’s currently 3 inch ic pipe.
08-10-2019 05:43 PM
BogiesAnnex1
Quote:
Originally Posted by Pupsvette76 View Post
So it’s an 88mm turbo making 20psi and it makes around 870hp. I do believe I need a more efficient intercooler but the reason I’m not really worried about it specifically is because where the heat really is is at the carb bonnet. On the topic of the cArb bonnet it’s not as smooth flowing as it could be. Sort of a tight turn it’s a spectre carb bonnet. I do have a water meth setup partially installed on the car I guess it’s time to use it. I also plan on switching to e85 because I currently run ms 109 and it’s too expensive not to mention the cooling I could get from e85 would be great.

20 PSI puts you well into the danger zone where heat is very hard to control.


One of the first things is to get pressures on the inlet and outlet side of the cooler to determine just how big the pressure loss across the cooler is. From here you can determine if a larger cooler and or bypass controls would be useful.


I'd like to see a larger pipe on the discharge side as well as a larger bonnet.This would convert some of the velocity to pressure which makes changing directions a lot easier and will release some heat as well.


If the track lets you get away with it a fine water mist over the cooler will greatly increase its efficiency. This doesn't need to be enough to drip, just keep the core wet then evaporate into the passing air flow.



Bogie
08-10-2019 11:58 AM
64nailhead Forgot to mention, don’t lose a second if sleep about the flow ‘efficiency’ of your cab hat. Spending money to make it more efficient to pick up hp that is a percentage of the gain if 1/2 a lb of boost is truly a waste of time.

You have all the power you need in terms of air flow - it’s a stiffer wastegate spring or kite duty cycle in your boost controller lol.


Sent from my iPhone using Tapatalk
08-10-2019 11:56 AM
64nailhead Yes I run a controller. A snow performance stage 2 kit. It’s fully self contained in a 2.125 gauge. It is also a boost gauge. It included the 3qt tank, pump and enough for one nozzle. It was less than $400 and we’ve been using it in the street for either 3 or 4 years without any failures.

Regarding heat soak, yup, you’re going to have a bunch with any thing forced induction. It took me a minute or two to get head wrapped around that, but if you think that the turbine is at exhaust temps all of the time (800-1000 degrees). Then you shut off the motor and the heat transfers over the to compressor and compressor housing, then when you refute the car you really need some air flow across the cooler to get that cooled down. At the strip, it just ain’t happening. The same goes for the carb hat.

If you had a normal air cleaner, then when you restart the car it almost immediately pulls in ambient temp air, which immediately cools the intake and carb.

We can cruise at highway speeds on a 90 degree day and have the intake temps stay over 100. Then jab the throttle to full meth injection for 3-4 seconds and it will cool the intake temps into the 70’s and they will never get above 90 again until we come to a stop.


One thing for certain though. Use the meth as a safety unless you have 8 individual injectors for it. All the cylinders are not getting the same affect from it if you have it in front of the throttle plates.


Sent from my iPhone using Tapatalk
08-10-2019 10:31 AM
Pupsvette76 Do you run a controller for this setup. I’ve looked them up and thought about it but haven’t run the water meth in like 4 years so I never ended up buying a controller as it would have been a waste of money to buy something to control a system I don’t use lol.

Quote:
Originally Posted by 64nailhead View Post
Of course, how much boost? Are you making over 800hp?

I'll guess 20+ and over 800. You have one of 3 choices IMO - better intercooler (lots of $), E85 or methanol (E85 is difficult to get at consistent % and methanol is $x2), and lastly - meth/water injection (cheap and easy).

I run meth injection. Look at the graph. I came to a stop, let off the brake and went WOT to 3rd gear (street tires.) You can't see the intake temp (MAT) at zero mph, but it was 127. In about 4 seconds it dropped to 83. The meth turns on at 4psi (125kpa) and full on 8 psi (153kpa). You can see it's quite effective.

p.s. - I run 50/50 boost juice at 15 gal/hr and it actually adds fuel. So with the street tires spinning (less engine load) and lower boost (below 12psi) it fattens the AFR somewhat - into the mid to high 10's. If it's not spinning it sits in the low to mid 11's.

EDIT - that screenshot isn't very legible <img src="https://www.hotrodders.com/forum/images/smilies/frown.gif" border="0" alt="" title="sad" class="inlineimg" />
08-10-2019 09:56 AM
Pupsvette76 This is the engine bay at the moment. As you can see I wrapped the headers to prevent heat soak. It they still give off pretty good heat. I also insulated and heat shielded the charge pipe section that runs above the header for the same reason
08-10-2019 09:54 AM
Pupsvette76 So it’s an 88mm turbo making 20psi and it makes around 870hp. I do believe I need a more efficient intercooler but the reason I’m not really worried about it specifically is because where the heat really is is at the carb bonnet. On the topic of the cArb bonnet it’s not as smooth flowing as it could be. Sort of a tight turn it’s a spectre carb bonnet. I do have a water meth setup partially installed on the car I guess it’s time to use it. I also plan on switching to e85 because I currently run ms 109 and it’s too expensive not to mention the cooling I could get from e85 would be great.
08-10-2019 07:43 AM
64nailhead Of course, how much boost? Are you making over 800hp?

I'll guess 20+ and over 800. You have one of 3 choices IMO - better intercooler (lots of $), E85 or methanol (E85 is difficult to get at consistent % and methanol is $x2), and lastly - meth/water injection (cheap and easy).

I run meth injection. Look at the graph. I came to a stop, let off the brake and went WOT to 3rd gear (street tires.) You can't see the intake temp (MAT) at zero mph, but it was 127. In about 4 seconds it dropped to 83. The meth turns on at 4psi (125kpa) and full on 8 psi (153kpa). You can see it's quite effective.

p.s. - I run 50/50 boost juice at 15 gal/hr and it actually adds fuel. So with the street tires spinning (less engine load) and lower boost (below 12psi) it fattens the AFR somewhat - into the mid to high 10's. If it's not spinning it sits in the low to mid 11's.

EDIT - that screenshot isn't very legible
08-10-2019 05:27 AM
ProStreetRob Wow those are high, the first place to look is make sure you have enough intercooler and no issues with flow. Then make sure you have a properly sized cold air intake with a well flowing air filter. Other things that would help are a larger intake or turbocharger. High Timing or Running Lean would also create a heat issue

I'm on my 13th Boosted vehicle now (mostly Supercharged, but a couple of Turbo's). I have run as much as 25lbs of Boost on a Supercharger and there were a few that had this issue.... I was running so much boost that when I went WOT it would actually suck the rubber Intercooler or Intake elbows closed, (kind of like a radiator hose will sometimes collapse and no longer flow).

Of course Meth Injection would be you easiest fix and also give you some safety and insurance by preventing detonation as well as keeping your iat's in check.
08-10-2019 02:55 AM
Dfish1247 You have turbulence there being the air goes from coming sideways to turning down into the carb. But, the hat would have to be tiny to gain 125+ degrees in 10 seconds. Are the intake runners flaming hot as well?

If you have a wastegate on the turbo, you could back the boost down and see if there's a point where you stop generating so much heat.

Boost is just a pressure reference after all, more pressure=more heat.
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