Mine isnt that high on boost, but had it tuned 2 weeks ago by my old tuner. Also logged iats with my previous tune at the track. Car made 12.4psi with 11.25 degrees of timing. IAT on the dyno was low 140's. Same when I ran it at the track. With the GT my IATs were in the 120's making the same boost. I think it has to do with the big tranny cooler sitting above the Procharger 3 core intercooler not allowing much room for the heat to escape up through the grill. My timing pulls gradually. Set for 13* when iats are under 100F. Pulls .25* every 6 degree increase after that. One thing i didnt like with my previous tuner was he started with timing at 11.5* when under 120F and then yanked 2 degrees at 120F and another 2 degrees at 140F. That was way too much timing being pulled at one time imo for timing already being so low. I think if you're not pulling anything until 140F youre average power stays high throughout the run and then yanks a bit just before you cross the line. I think your iats are very good for the amount of boost.

 

I have a twin screw so take this how you want....but I dont start to pull timing until 160.

 

133 is nothing. It's especially not bad for that much boost. I've got a good friend with a 9 second T-trim setup. He is literally spinning it as hard as you possibly can. Even with water/meth, he can only get it down to around 120-130. Without the water/meth, it's up well north of 150 depending on ambient.

Generally speaking, 140 is indeed a good tipping point to begin pulling timing as long as you don't build your borderline table when it's like 40 degrees outside. The 6 degrees you are speaking of may be a bit much, though. On my car with the old SVO setup, I ran full timing at anything less than 140. At 140, I think I have it pulling 2 degrees. At 160, I've got it pulling another 3. And at 180, I've got it yanking a ton out.

Granted I'm (or "was") running a water/meth setup, which skews the detonation suppression in my favor relative to an intercooler at the same IAT, but I'm running 23 degrees of timing with 13 pounds of boost up to 139 degree IATs. My buddy with the T-trim setup was running in the 20 degree range with his setup (with the water/meth on).

Also, to give you something to compare your 133 to: my SVO would run anywhere from 150 to 175 depending on ambient temps....while cruising. With no water/meth, at WOT, it would peg the sensor at 254 degrees before 4k rpm. With the water/meth, I could get it down in the 115 range in the cooler months of the year, while around 140-150 is the best I could do when it was hot outside. And that's spraying 24 gallons per hour worth of water/meth (3 nozzles [10, 7, 7]). Using Snow Performance's nozzle size designation, that's 1500 mL/min, which is 2.5 times bigger than their biggest nozzle offered. :surprise:

So you can see why I say your 133 at 20 pounds of boost with just an intercooler is not bad. lol.

 

Thank you all for the reference, that's definitely reassuring about your intake temps.

For reference, I'm running 17* on e85. I might back it down to 16*, not sure yet. I had been running 18.75 on 15psi previously.



Jesus, I can't imagine 250+ IATs! I was thinking about spraying meth, but I'm kind of hesitant to add any more complexity to the situation. At WOT, there is already a lot of liquid going into those cylinders due to the e85, not sure I should push it more.

It's also a bit more than 20psi. It's pegging my gauge. I bought a 30psi one that I'll put on tonight, but I estimate it at 23 or so. I'll probably back it down to pulling 2* at 140IAT and 5* at 150*.

 

Not apples to apples, but my Uncle has a Vortech on his 02 Z28, pushing 10-12 lbs, air-to-water aftercooler. Before his Meth injection, his IATs started in the 70s in the burn-out box and ended up in 120s-130s at the end of the track (with a mix of water and ice in the tank), he was running 19* on 110 octane (not sure at what IAT it would pull timing).

With his Meth (injecting 100% meth) it is a constant 70ish degrees the whole way down. He is running 10.4s at 125mph. Just throwing this out there for more data comparison is all. Take it or leave it...

 

Damn that thing must be making some big power at 20+ psi. I am pushing 18psi on my jt trim with a 4" cx racing intercooler. At wot my temp gets to around 120*


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Sounds about normal as far as your AIT's once you start compressing that air faster its heats up a little more but your TEMPS are nothing to worry about at those 20+PSI pulls.

 

It hit 140* yesterday. I guess I didn't anticipate how much of an exponential increase in heat there is with boost pressure. 22psi makes A LOT more heat than 15. I might spray meth post blower once summer rolls around.

 

A customers car we built with a 363 sbf and YSI blower at 13 psi On E85 with no IC and water meth sees about ~130 on a 4th gear pull. Thats not too bad. We usually pull timing at 180 on E85.

On my car with my tiny CX intercooler I see about 180 at the end of the quarter, definitely way past this IC's efficiency. Typically 130 and below is nothing to worry about. There is much better IC's out there but they start costing well over $1300.