I'm running a boosted 2200 with both an air to water intercooler and water injection. For fuel, I have a custom EIC that uses the wideband to tune itself, so the ECU's open loop fuel management isn't much of a concern.
I'd like to encourage the ECU to retard timing and avoid using a delay box if possible, so would mounting the IAT sensor between the turbo and intercooler be a good way to accomplish this? Does anyone have any data regarding the 2200's ignition vs IAT curve?
2002 Cavalier 2200 5spd
Mounting it on that pipe would retard the timing because it would read a high temperature. So...yes.
is this a 97+ car? why not use hpt?
Why wouldn;t you mount the IAT after the intercooler before the TB?
FU Tuning
I meant mounting the IAT directly after the turbo compressor so it can read hot air and pull timing.
HPT would be a waste of money as I'm running the stock injectors and don't need to mess with any fuel values.
2002 Cavalier 2200 5spd
It's ok to run stock injectors with an EIC. Instead of runing 4 he's probably running 6 or 8 injectors.
He even said he was using an EIC in the first line of his post.
Gilles
2.3 Ho
Solid Snake wrote:I meant mounting the IAT directly after the turbo compressor so it can read hot air and pull timing.
HPT would be a waste of money as I'm running the stock injectors and don't need to mess with any fuel values.
wouldn't the IAT sensor melt?
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Actually, I'm running five injectors. The fifth is a Bosch 95lb/hr unit. I'd expect pre-IC charge temps to reach 250F. I don't know if the sensor would melt, but if it did I guess I couild always mount it post-IC and put a resistor in parallel to offset the reading.
2002 Cavalier 2200 5spd
Say I max out the IAT reading. How much timing could I expect the ECU to pull on average?
2002 Cavalier 2200 5spd
Solid Snake wrote:I meant mounting the IAT directly after the turbo compressor so it can read hot air and pull timing.
HPT would be a waste of money as I'm running the stock injectors and don't need to mess with any fuel values.
I do not think it would be a waste. You could adjust timing, and timing is doen off map, so you could adjust for boost and none boost.
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Say I max out the IAT reading. How much timing could I expect the ECU to pull on average?
I will look at a 2200 file when I get home and let you know the max timing pulled at what temps.
FU Tuning
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I do not think it would be a waste. You could adjust timing, and timing is doen off map, so you could adjust for boost and none boost.
If I went the bigger injector route from the beginning, maybe it would be worth the price, but not just for the timing settings. A delay box would be cheaper. Then I'd have to buy a 2BAR sensor and remap for that. The ECU still uses the stock 1BAR and my EIC uses a 3BAR.
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I will look at a 2200 file when I get home and let you know the max timing pulled at what temps.
Sweet, thanks a lot!
2002 Cavalier 2200 5spd
Ok going based off a 98 2200 file:
MAP KPA
60 70 80 90 100
Temp: 111 -2 -4 -6 -6
154 -4 -6 -7 -7
198 -2 -4 -6 -7 -7
FU Tuning
so how are we preventing fuel puddling with this extra injector exactly?
last I checked, the OHV intake manifold wasn't a very good design for pumping an air/fuel charge through.
John, am I reading this right? It looks like there's more retard at 154 than at 198. Thanks for the info.
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so how are we preventing fuel puddling with this extra injector exactly?
last I checked, the OHV intake manifold wasn't a very good design for pumping an air/fuel charge through.
Charge pipe and intake runners are wet with water and fuel. I don't have any problems with the engine bogging when I let of the gas or anything. The response is quite good. Any symptoms I should be looking for?
For tonight, I moved the IAT to after the intercooler to see how well it performs, and with ambient temps in the 70's, IATs stayed in the 80's. I'm using a radiator from a small car as an exchanger and with about 1.3 gallons of water in the circuit, it seems to work very well.
2002 Cavalier 2200 5spd
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John, am I reading this right? It looks like there's more retard at 154 than at 198. Thanks for the info.
Sorry when I typed that up it looked better than it does now. I would not say that. 198 degree's starts pulling timing at 60kpa, where 154 degree's does not start pulling timing until 70kpa
FU Tuning
Oh I see, so the missing values are actually zero. There's also just one additional degree of timing pulled at WOT, so I can't really rely on the IAT for more than that.
Do you guys think I should go for a delay box or live with stock timing? I was looking for a 6* retard.
2002 Cavalier 2200 5spd
Solid Snake wrote:Oh I see, so the missing values are actually zero. There's also just one additional degree of timing pulled at WOT, so I can't really rely on the IAT for more than that.
Do you guys think I should go for a delay box or live with stock timing? I was looking for a 6* retard.
What about a MSD box. You can program them to take timing out at certain RPM's or by boost.
FU Tuning
there's a place on web called wait for performance,send in your comp and requests for 75-100 bucks they program what you wantnull null
sorry bout last post it's called waitformeperformance.com
pete toures wrote:sorry bout last post it's called waitformeperformance.com
Its actually www.wait4meperformance.com, and BTW, Mail Order tunes suck..... Especially on a boosted vehicle...
P&P Tuning
420.5whp / 359.8wtq
