Quote:
Get a temp sensor in your upper IC pipe or TB elbow. If it's more than 10-20 degrees over ambient then your IC isn't working properly.
Thanks Jayson, I finally took your advise and put a GM IAT in my uicp. I cut the end off a 3/8 pipe elbow, and welded it in because I couldn't find anyone with pipe thread bungs in my area.
I tested a couple different aftermarket sensors designed for an 88 Pontiac 6000, or a Grand National, (to name a couple aplications), and I found the Wells (AZ has 'em) responds quicker than a BWD brand. Looks like this:
Last Wednesday I went to the track with my Modis metering the resistance of the sensor, and a chart to decipher the Ohmage into Tempage. I did eleven back to back runs with my best 1/4 ET being 12.794@108.22mph - 60'/1.783 - 1/8mi.-8.21@86.51.
My best 60' was 12.89@107.14mph - 60'/1.769 - 1/8mi.-8.27@85.94mph.
It was 69F* outside, and my upper intercooler pipe was flowing air that was at least 120F* by the end of the 1/4 mile. My ECU was pulling 3* of timing due to knock at the top of fourth gear.
I met a guy at the track who knew another guy who had a 600hp PTE FMIC for sale. He dropped it off to me last night, (Saturday) and I installed it this morning (Sunday) and headed to the track. As soon as I got on the interstate I could see this IC was going to help my ETs. The intake temps barely climbed, and the boost was spiking to 20 and holding to 18psi at redline.
I only had time to squeeze three passes in.
60'-1.804_1/8-8.29@87.06_1/4-12.73@110.87 already beat my best time, and UICP temps stone cold.
Second pass_60'-1.75_1/8-8.138@86.46_1/4-12.59@111.34 spinning hard in 1st, but with a suprize perfect 1-2 shift that felt like an automatic. I knew I was missing that shift but... "clunk" it was in and boost was still on. I was like "No way!"
Third and last pass_ 60'-1.84_1/8-8.02@87.89_1/4-12.44@111.80.
Intake air temps started to hit about 85*F after the second back to back pass (67* ambient out), so an improvement, but not spetacular. The flow was possibly the biggest help, as my boost pressure was no longer dropping like a stone above 5000 rpm.
That's over .3 seconds and around 3.5mph faster than my previous best and in only three passes! I'm pretty happy with it considering. If I didn't have to leave to go pick up my daughter I might have gone faster. Suddenly high 11s on nothing but pump gas and an EVOIII don't seem so unattainable.
Ps. The PTE FMIC... $100 Cha-ching!