Oilcooler blocking intercooler - AFR question
Thread Starter
Drifting
Joined: Feb 2007
Posts: 1,961
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From: Dubai
Oilcooler blocking intercooler - AFR question
how bad is that really? I got my Stock oil cooler sitting in front of the intercooler.
So if Colder air = denser air = more power, then am I loosing power by having the oil cooler sit infront? Should I waste my time looking for another place to throw the oil cooler at, will I see a "gain"
also, im posting my dyno chart, please dont comment about the RWHP number, in simple words a STOCK Z06 dynos 366 RWHP on this dyno.
So the question is, do you recommend a re-tune and in turn leaning the AFR? The highest point on this graph which is about 11.5:1 at the pipes, read out 10.8:1 at the collector, do the maths
Any power left on the table?
So if Colder air = denser air = more power, then am I loosing power by having the oil cooler sit infront? Should I waste my time looking for another place to throw the oil cooler at, will I see a "gain"
also, im posting my dyno chart, please dont comment about the RWHP number, in simple words a STOCK Z06 dynos 366 RWHP on this dyno.
So the question is, do you recommend a re-tune and in turn leaning the AFR? The highest point on this graph which is about 11.5:1 at the pipes, read out 10.8:1 at the collector, do the maths
Any power left on the table?
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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A 10 A/F is mighty rich for a stock car. Hells fire, I run a 12.2 on a twin turbo 550RWHP LS6 Camaro. Your not losing power because of the air supply or colder air, that A/F would kill anything. I'd lean that puppy out a tad.
Elmer
Elmer
Thread Starter
Drifting
Joined: Feb 2007
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From: Dubai
supercharged, this thing is still pig rich I know, however cant you not compensate for the power loss of running a rich mixture by bumping up timing?
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Elmer
Thread Starter
Drifting
Joined: Feb 2007
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From: Dubai
To be totally truthful, that A/F simply looks bogus. NOTHING hits a flat line like that. It looks like it goes to 10 OR MORE and simply drops dead at 10 but I'm thinking it is dropping further. Any WOT A/F that I've ever seen, has variance in the number. The variance might not be +/- .1 or .2 but it doesn't flat line like that.
Elmer
Elmer
still there is as I could see a 0.3-0.4 variance between tail pipe measured AFR and as measured at the collector.
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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look at the blue line not the red one, the red one is the BEFORE tune etc... The line is so flat because this is the smallest number the wideband attached to the car could read
still there is as I could see a 0.3-0.4 variance between tail pipe measured AFR and as measured at the collector.
still there is as I could see a 0.3-0.4 variance between tail pipe measured AFR and as measured at the collector.
Ok, I'll be quiet now
Former Vendor
Joined: Dec 2006
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We shoot for an air/fuel ratio with forced induction in the 11.5/1 range at wide open throttle, with wot timing at approx 18 degrees. We always weld a bung into the exhaust at the headers, tailpipe readings can be bogus especially on an exhaust system that is not 100% welded, as outside air can get sucked in around the seams under wide open throttle.
We normally use NGK TR6 4177 spark plugs, gapped at .035.
I'd start here and see what you have. Bob
We normally use NGK TR6 4177 spark plugs, gapped at .035.
I'd start here and see what you have. Bob
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Burning Brakes
Joined: Mar 2006
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From: Arlington Heights Illinois
To address the original post, placing an oil cooler directly in front of the intercooler sounds like a bad idea to me. If the intercooler doesn't get plenty of fresh air it will heat soak and you sc will be useless.
I installed my oil cooler adjacent to the dual side mounted inter-coolers and also utilized a tiger shark front end to generate more airflow to the engine bay and appropriate components (radiator, intercoolers and oil cooler).
The result was a huge drop in coolant/oil temps and a massive increase in avail power on the track. This set up has been RR weekly all last year.
I installed my oil cooler adjacent to the dual side mounted inter-coolers and also utilized a tiger shark front end to generate more airflow to the engine bay and appropriate components (radiator, intercoolers and oil cooler).
The result was a huge drop in coolant/oil temps and a massive increase in avail power on the track. This set up has been RR weekly all last year.
