My truck (04 SS with Maggie-8 psi, cam, headers, cai, etc) runs awesome if you let it cool wayyyyyyyyyyyyyyyyyyyyyyyyy down, but if you make a few passes, and once it gets heat soaked it's a major pig. I'm wondering if meth injection will cure this?

Anyone want to share their experience with meth inj?

How about relocating the inlet sensor to the air cleaner area or is that a big no no? Thanks guys!

Just for point of reference, I went from 13.60 at 97 to 13.90's at 95 after 3 passes. Let it cool for 3 or 4 hours and went 13.10 at 101!!! Even after 3 or 4 hours (70's temps), the blower was still retaining some heat, but the engine felt pretty cool. Polished aluminum sucks for heat transfer....lol

 

I installed the larger fluidyne heat exhanger, in addition to the one that comes with the radix, and saw a major difference in IATs and cool down time. I know others will disagree, but it seemed to work for me.

 

i needed cooling with my radix a as well and i sprayed water to cool...worked very well...another heat exchanger is the ticket also...

 

Do you have the intercooled version of the Magnacharger? Actually aluminum has one of the very best heat-transfer attributes Methanol will do nothing for heat-soak. What are your IAT's? I don't seem to have the problm you describe.

 

Others shouldn't disagree too much. A larger heat exchanger is definitely a good idea. Upping the voltage to the pump a little with a larger Hxr would do really well.

No, don't remove the IAT sensor from the radix. I have found through tuning most radix setups have a pretty aggressive IAT advance table. You are pulling tons of timing as it gets hot. You have any tuning or scanning software? What kind of IAT's are you dealing with? Are you sure the intercooler pump is working good? Blah blah blah, with out seeing the actual IAT temp it's hard to make too many suggestions, besides what moog suggests. I also say get a custom tune if you haven't already.

As far as meth goes, no...I don't think it adds all the cooling that is spoke about. Besides at 8psi, my opinion is that meth is ALMOST a drag on power. (yes flame suit is on) People probable tune it too rich at 8psi. 9+ lbs is when the magic happens IMHO. Not a serman, just a thought. If everything is normal and you don't want to mess with the IAT advance (or lack there of) try water injection.

 

I have experienced similar issues at the track. I know the methanol cools the charge down, just not sure how much it hellps with heat soak. After a run, the j-tube on my blower has some frost on it and it is cold. Just not sure how much that helps the actual intake temp after the air is compressed.

I also made a switch that runs the electric fans and intercooler pump when the engine is off. That has seemed to help a lot at the track.

I read an article in Chevy high Performance I believe where they slowed down the intercooler pump and were able to achieve lower intake temps. Something about the coolant spending more time in the intercooler core.

 

Great feedback so far---thanks! I do have a Tech 2 and will bring it with me next time and log some data. Part of "my problem" may be my fueling issue. My truck is a returnless system (04) and my pressure drops off to 50 by the top of 2nd. As a result it got lean on the dyno so the guy that tuned it didn't put much timing into it (10-11 degrees at 6100rpm). This was meant to be a temporary fix until the fueling issue was resolved. I'm wondering if he put in some conservative values for the timing when the IAT is higher.....I'll have to ck those IAT's vs. Timing values.

So if the J-tube was frosty, wouldn't that help the heat soak

 

Yeah neat article. I want to say they talked about fine balance of going one way or another. Slowing it down worked better, but I can't help but to think a larger Hxr and a tad faster flow would help as well. Just a tad...cooter hair faster.

 

I thought polished aluminum didn't transfer that well? Yes, mine is intercooled. I'll have to ck, but I thought they were in the 130's.....

I ran at the track Saturday (70's and a tad muggy). Went 13.61 at 97 pretty much right off the road (15 minutes cool down). Hot lapped it and went 13.80at 96 then 13.98 at 95. Let it cool about 3-4 hours and it went 13.10 at 101! Made a few more passes pretty quick after that and seen the same trend (et, mph, 60) falling off as it got hotter.....

 

Yeah aluminum transfers heat exceptionally well, that's why it feels hot because it is transferring the heat from the block My IAT's go into the 140*s but cool down pretty quick. I did go to a double size heat XR but the rest of the cooling system is stock.