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Old 02-24-2011, 10:34 AM   #51
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Quote:
Originally Posted by 1turbofocus View Post
I tune dozens of FI Focus and it is very hard to tell what there going to be used for so I go to the safe side on everyone , I have found that safe to me and for my customers is in the 10.8 range and at 10.8 there is little to no loss in power that I have seen on the dyno

Tom
There is not a magical afr reading that works for everyones situation. I tune my cars based on what the customer is using the car for and how the car is actually reacting on the dyno.

I am not trying to say what is better, but I would consider 20-30hp a significant difference and considering I have had turbo cars running at 12:1 afrs for YEARs on the stock rotating assemblies and never had a problem, I would not consider it unsafe to run leaner than 10.8. To each his own I guess.

I was thinking about pulling a car on the dyno and doing some testing for everyone at 10.0, 10.5, 11.0, 11.5, 12.0, 12.5 afrs to really see what the power difference is. I don't know when I will do it, but I have been thinking about it for some time.
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Old 02-24-2011, 12:22 PM   #52
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Originally Posted by Top Speed View Post
I agree its lean but it makes power and stays together. I typically tune customer cars to 11.5-12.0 depending on the situation.
I have actually ran my Acura @ 13.5:1 and 26degrees of timing at 540whp many many times...that's 111 octane of coarse.

To each his own.
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That's great but you aren't the one running 13.1 either. Compared to what TS is running, YOU are pig rich......lol
Lmao you gotta reAd better. They would not consider mine pig rich. Just safe
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Old 02-24-2011, 03:27 PM   #53
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Who is "they"? I never mentioned anyone specifically. I was referring to anyone comparing AFRs. If I see one tuner running 13:1 and and I see you running 11:1, then compared to them you are rich. What do you run again, 11.0:1?
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Old 02-24-2011, 03:58 PM   #54
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Quote:
Originally Posted by islandfocus View Post
who is "they"? I never mentioned anyone specifically. I was referring to anyone comparing afrs. If i see one tuner running 13:1 and and i see you running 11:1, then compared to them you are rich. What do you run again, 11.0:1?

11.6
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Old 02-24-2011, 05:39 PM   #55
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Originally Posted by J_Train View Post
whats wrong with Hockey? i don't know what your talking aboot. baseball, football, and basketball is useless too.
Well, the thing is, I know how to spell and I most certainly didn't type "hockey" I typed "hocky" with no "e" .

Sarcasm aside, there is a member on FJ, not FF, who really really likes to flame people. He is very knowledgeable but a complete douche bag and I tell him all the time. Stolle is filling in for him on FF
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Old 02-24-2011, 05:55 PM   #56
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Something else everyone needs to take into consideration is how much timing each individual is running on there perspective engines.
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Old 02-24-2011, 08:16 PM   #57
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Quote:
Originally Posted by Top Speed View Post
There is not a magical afr reading that works for everyones situation. I tune my cars based on what the customer is using the car for and how the car is actually reacting on the dyno.

I am not trying to say what is better, but I would consider 20-30hp a significant difference and considering I have had turbo cars running at 12:1 afrs for YEARs on the stock rotating assemblies and never had a problem, I would not consider it unsafe to run leaner than 10.8. To each his own I guess.

I was thinking about pulling a car on the dyno and doing some testing for everyone at 10.0, 10.5, 11.0, 11.5, 12.0, 12.5 afrs to really see what the power difference is. I don't know when I will do it, but I have been thinking about it for some time.
This would be interesting. Also do you know your EGT's? When running 13:1 Under Forced Induction?

I've been working for and with a performance shop. Not saying I'm an expert or have more experience but I would figure that you would have to pull so much timing at 13:1 do avoid detonation. Also prolonged pulls, or long pulls the intense heat build up could melt pistons, warp cylinder heads, burn exhaust valves.

Just curious more data on the 13:1 car?
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Old 02-24-2011, 08:27 PM   #58
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Quote:
Originally Posted by focusguy87 View Post
This would be interesting. Also do you know your EGT's? When running 13:1 Under Forced Induction?

I've been working for and with a performance shop. Not saying I'm an expert or have more experience but I would figure that you would have to pull so much timing at 13:1 do avoid detonation. Also prolonged pulls, or long pulls the intense heat build up could melt pistons, warp cylinder heads, burn exhaust valves.

Just curious more data on the 13:1 car?
They mentioned they were using race gas (111 octane) when running his personal car at 13.5:1 A/F
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Old 02-24-2011, 09:48 PM   #59
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Originally Posted by Bellicose View Post
They mentioned they were using race gas (111 octane) when running his personal car at 13.5:1 A/F
That helps detonation by having a more controlled burn. Doesn't help his EGT's

I've really never heard of such crazy AFR's for forced induction.
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Old 02-25-2011, 12:15 AM   #60
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what do you guys do with timing?

Currently I idle at 10 advanced and work my way up to 33 on 15psi.
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