Competition Which Intercooler for pulls?

[SMoules]

A friend of mine has a 12V automatic with twins for truck pulls. He says psi entering intercooler is 100 and coming out is 72. What is the intercooler of choice out there to wtihstand this kind of pressure? Looking for a company that will stand behind there intercooler for this kind of punishment. I told him PDR for the price and who they are is probably the best choice. Anyone with any info please inform.

 

[Jim Fulmer]

Wow that is allot of pressure drop, I can't believe he hasn't blow the tank off it!



The PDR intercooler is a nice one and will handle that amount of pressure. I did the initial test on the first one, the pressure drop across the cooler I think was 4 psi at 60lbs. Intake air temp drop at the hat was 55 degrees.



Jim

 

[bgilbert]

www.haisleymachine.com sells a '100 psi' intercooler.

 

[RyanB]

Dedicated pull truck or no???



I am pretty much going to be making mine a dedicated truck this comming year and am seriously thinking of running without an Intercooler for that simple fact... pressure drop! Makes total sense because you are talking about a 3" or 3. 5" inlet that goes into whats like a manifold and diverts the air into a bunch of 3/8 x2" holes and then follow that for 36" and then back into another manifold and out the 3" pipe. I would say thats alot of restriction!



Also, how much does an IC actually do on the pull track??? you are going less than 20mph (usually) and most of the times the fans are not locked up so really not that much air is moving thru it so there isn't a whole lot of increased cooling.



I know that alot of the big guys in the Mod class just run a pipe across like the old Non-IC'd 12valves. Plus for cooling water and lots of it will do ALOT more than the IC could anyway in a pulling situation.



Something to think about anyway before you go spend $1000+ on one... that would pay for one heck of a Water system or even some nice huge injectors!!!



RyanB

 

[Jim Fulmer]

There is more to an intercooler than meets the eye, yes air running across it to dissipate heat helps but there is more than meets the eye. The idea or principle works the same as it does on an Aircraft Airconditioning system, compress air real tight then release it into an open bigger chamber and it will do what it referred to as supercool. This is how we take 360-420 degree air off the motors and plumb it to the ACM (air cycle machine) and compress it then turn it loose into ducting and get 40 degree air, if you want the air hotter then by-pass the compressor (looks like a big turbo) if you want it colder you run more air through the compressor..... ok back to trucks.



The principle will work the same in an intercooler to an extent, but to each his own. If you want an intercooler run one, if you don't then don't. If you want to run a real intercooler build a Water to Air like real (gasser) race cars have.

 

[banshee]

No offense, Jim, but routing the air through the larger volume of the intercooler doesn't cause a temperature drop unless the pressure drops as a direct result of the increase in volume. Your aircraft A/C units generally (not always) pull bleed air of the HP compressor towards the final stage, cool it (while still compressed), and then release that cooled, compressed air through a turbine which causes a rapid cooling due to pressure loss(following the Ideal Gas Law, although air is by definition not an ideal gas). This same effect can be seen by draining a tank of compressed air... . when the pressure drops rapidly the temperature has to drop to maintain equillibrium.

 

[Jim Fulmer]

Ok just thought it would still do the same thing in a small way.



Yesterday on the dyno the drivers side tank was 135 degrees at the end of the run on #2 only, that's about the same as I read on the probe in the hat which is around 130.



Jim

 

[RyanB]

Okay, so from those findings is an intercooler really going to do that much for an engine durring a pull? I can see a benifit in drag racing were alot more air would be pulled thru the fins and help with cooling but on the pull track the speeds are ALOT less there for I would think water would be the better thing to go with.



Im really intrested in this because next year I am thinking of getting rid of the IC



Lets hear some other opinions!



RyanB

 

[BigBadDodge]

Ryan, dedicated puller = get rid of it



BBD

 

[RyanB]

Ryan, dedicated puller = get rid of it



BBD

So do you still have yours or is also gone? right now I am plumbing in my twins with the IC but if I ever have clearance issues again with the Fan/Radiator :--) due to my conversion the IC is getting pitched to make the rad a little futher from the fan!



RyanB

 

[BigBadDodge]

Currently, I still have one, its the PDR Intercooler.



BBD

 

[zstroken]

We all need to think about more than just convection cooling in this app. Now somebody like jim who can run like a 100 charge air temp may not need one. We need to think about conduction also. I need to put a temp probe in my truck to see that is before and after, but you have to remember that if your charge air is in the 200 area, then your intercooler is going to be about 100 or less that gives you a delta of 100. I don't have enough data. For a dyno truck I would say no. Those are such a short burst and you look want the motor to accelerate hard and fast for just a few seconds.

 

[Rebel Ram]

Get'n all this Steve? :-laf :-laf :-laf

 

[Jim Fulmer]

Z The time that I tested the stock intercooler it was a 280 degree drop from inlet to outlet, along time ago.



I'll have to see if I can do this again with the single, but I need new probes... . one is beat up bad and one failed on Sunday.



Jim

 

[SMoules]

this is what i love about the TDR, you get a whole lot of info off one simple question. thanks for the replies guys.

 

[zstroken]

How do you beat up a temperature probed?? I think your chilling the water you inject too much Jim. It needs to be above freezing. LOL. If you can inject water in the class the guy is in. I would say junk the intercooler.

 

[Jim Fulmer]

It's beat up externally, actually both are. Bent too many times.



Jim

 

[Timbeaux38]

Look here:
http://hellmannperformance.com/

Joe makes some IC's that flow nicely, and he can custom make them for your application

 

[BigBadDodge]

Wow, I am liking this exhaust manifold on joe's page anybody know what it is made of? anybody using one with any feedback? will it crack since its not a pulse type? please e-mail me if you know anything about it as to not hi jack this thread to far sorry



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BBD

 

[Diesel Freak]

Wow, I am liking this exhaust manifold on joe's page anybody know what it is made of? anybody using one with any feedback? will it crack since its not a pulse type? please e-mail me if you know anything about it as to not hi jack this thread to far sorry



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BBD

hmmm definately not a fan of this design