ACTs
Turbo Mini Forums

Anyone know what they are running?

alex

AlexF

errr maybe, what is it?

Team Racing

air charge temps... I thought this was a TURBO forum

alex

AlexF

This is the data logging from my ecu while on the rolling road. So the air intake temps should be a little lower. The air temp here is taken after the intercooler. I will be taking some more readings soon, before the intercooler.

Ch1 Engine Speed (rpm)
Ch2 Throttle Pos (%)
Ch3 AirTemp (?C)
Ch4 Boost (bar)

Ch1 Ch2 Ch3 Ch4
Time Stamp
16:33:12.12 1786 100 30 0.03
16:33:12.22 1806 100 30 0.02
16:33:12.32 1801 100 30 -0.08
16:33:12.42 1813 100 30 -0.05
16:33:12.52 1815 100 30 -0.02
16:33:12.62 1818 100 30 0.03
16:33:12.72 1835 100 30 -0.10
16:33:12.82 1858 100 30 -0.04
16:33:12.92 1839 100 29 0.01
16:33:13.02 1904 100 29 0.03
16:33:13.12 1931 100 29 -0.05
16:33:13.22 1931 100 29 -0.05
16:33:13.32 2013 100 29 0.05
16:33:13.42 2050 100 29 -0.02
16:33:13.52 2050 100 29 -0.02
16:33:13.62 2141 100 29 0.09
16:33:13.72 2194 100 29 0.09
16:33:13.83 2194 100 29 0.09
16:33:13.93 2295 100 29 0.04
16:33:14.03 2321 100 29 0.03
16:33:14.13 2403 100 29 -0.03
16:33:14.23 2454 100 29 0.14
16:33:14.33 2481 100 29 0.09
16:33:14.43 2543 100 28 -0.03
16:33:14.53 2595 100 28 0.03
16:33:14.63 2643 100 28 0.10
16:33:14.73 2705 100 28 0.07
16:33:14.83 2744 100 28 0.07
16:33:14.93 2798 100 28 0.04
16:33:15.03 2871 100 28 0.00
16:33:15.13 2916 100 28 0.04
16:33:15.23 2969 100 28 0.01
16:33:15.33 3049 100 28 0.26
16:33:15.43 3128 100 28 0.05
16:33:15.53 3155 100 28 0.23
16:33:15.63 3248 100 28 0.12
16:33:15.73 3310 100 28 0.23
16:33:15.83 3350 100 28 0.28
16:33:15.93 3425 100 28 0.18
16:33:16.03 3480 100 28 0.28
16:33:16.13 3480 100 28 0.28
16:33:16.23 3590 100 28 0.46
16:33:16.33 3663 100 28 0.62
16:33:16.43 3663 100 28 0.62
16:33:16.53 3783 100 28 0.50
16:33:16.63 3834 100 28 0.49
16:33:16.73 3913 100 28 0.64
16:33:16.83 3948 100 28 0.89
16:33:16.93 3988 100 28 0.83
16:33:17.03 4041 100 28 0.83
16:33:17.13 4146 100 28 0.86
16:33:17.23 4159 100 28 0.76
16:33:17.33 4253 100 28 0.89
16:33:17.43 4276 100 28 1.00
16:33:17.53 4328 100 28 1.05
16:33:17.63 4475 100 28 1.15
16:33:17.73 4614 100 28 0.88
16:33:17.81 4614 100 29 0.88
16:33:17.91 4794 100 29 1.06
16:33:18.01 4865 100 29 1.24
16:33:18.11 4999 100 30 1.26
16:33:18.22 5089 100 30 1.05
16:33:18.32 5118 100 30 1.06
16:33:18.42 5198 100 30 1.08
16:33:18.52 5159 100 30 1.26
16:33:18.62 5178 100 30 1.01
16:33:18.72 5213 100 31 1.01
16:33:18.82 5159 100 31 1.24
16:33:18.92 5170 100 32 1.15
16:33:19.02 5153 100 32 1.03
16:33:19.12 5168 100 32 1.26
16:33:19.22 5168 100 33 1.26
16:33:19.32 5233 100 33 0.94
16:33:19.42 5213 100 33 1.06
16:33:19.52 5264 100 34 0.99
16:33:19.62 5306 100 34 1.02
16:33:19.72 5309 100 34 1.20
16:33:19.82 5379 100 35 1.12
16:33:19.92 5444 100 35 1.01
16:33:20.02 5438 100 35 1.03
16:33:20.12 5484 100 35 1.03
16:33:20.22 5518 100 35 1.10
16:33:20.32 5558 100 36 0.97
16:33:20.42 5628 100 36 1.04
16:33:20.52 5651 100 36 0.97
16:33:20.63 5664 100 37 1.12
16:33:20.73 5734 100 37 1.10
16:33:20.83 5738 100 37 1.19
16:33:20.93 5794 100 38 0.96
16:33:21.02 5833 100 38 1.16
16:33:21.13 5833 100 38 1.07
16:33:21.23 5920 100 39 1.02
16:33:21.33 5909 100 39 1.02
16:33:21.43 5924 100 40 1.07
16:33:21.53 5981 100 40 1.06
16:33:21.63 6040 100 40 1.07

Edited by Jimster on 13th Nov, 2003.

Team Racing

Just for info, while going around Combe (on a cool ish day) my air temps where no higher than 30 degress

Team Racing

thats on your TD5 intercooler?

very interesting... I'm going to do some base line testing on my std engine I think... would be interesting to see the differences!

alex

AlexF

yes this was the td5 intercooler.

Team Racing

At 13psi and 5000 rpm the charge air temp from my T2 was 120 degrees (the max my gauge could read)!

The intercooler drops this to 28 degrees max on the open road at this boost...

I am interested to see what a T3 does by comparison!!!



Taken from the 'Engine Specs' Post...
Intercooler:
RST series 2 modified unit sat behind the grill, not half behind grill & half behind bonnet front! (this took a lot of time to get in). Typical air temps seen are as follows:- steady 50mph = 10 degrees c; full boost 50mph = 30 degrees c, max recorded air temp after 1/4 mile run = 38 degrees c. Anything else?

Edited by turbodave16v on 13th Nov, 2003.

bloody hell!!!
as dave, your running the same turbo as me, (Renault 5) and at simular boost levels, my ecu was only seeing 30?C, we can assume that my intercooler is at least dropping 90?C!! Not a bad intercooler!

Team Racing

jim it looks great!!

I'm just drawing up some graphs here and looking at how ur turbo is running...

can you confrim for sure its a completely std T2?
Whats it off?
Do you know the ARs of the exh and compressor housings?

Do you mind if I do this?!?!?!

alex

AlexF

It is clear that cooling down to around 40 degrees is dead easy, even for a small intercooler.
The problem is trying to drop it any more - as you approach ambient air temp... As you can see, the HUGE TD5 intercoler drops the air temp that little bit further - especially as Jim is seen to run a higher boost than my 13psi (I usually run 16psi) according to his pressure sensor...

This isn't telling the whole story however - as Jim and me both know that the air temp leaving the small compressor is superheated... just because the intercooler is appearing to reduce the air temp by this margin, it doesn't mean it is a cool dense charge - just that it is a cool charge...

right done some excel work and come to some concluions...

After 1bar you are running a T2 miles of its map, I'm looking for a compressor map at the moment to confirm this. But basically you've hit the limit of the turbo and after about 4,500 rpm on Jim's your hitting the limit of the turbo, which is why at that point the ACTs rocket.

Intercooler efficiency looks good, but the turbo is being run in a seriously inefficient part of the map... basically a hybrid turbo would see big gains for you Jim.

AlexF

Alex, sorry I don't know the a/r of the turbo off the top of my head, all I know is it's a late Renault 5 turbo (water cooled)
What spec hybrid turbo would I need? Can you email me a copy of the turbo maps for the t2?

Team Racing

Alex - mail me!!!

lol I got ur mail after reading this!!

mail sent!

alex

AlexF