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...... My Fox body LS1 got low hp please help me ?????

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Old 09-02-2009, 02:45 AM
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I use 155lb BBK fuel bump, 6.0L fuel rail and stock injector for ls1 I think its 26lb.
As I said I will tight the return fuel line to increase the pressure because may be the return fuel line is big.
Old 09-02-2009, 07:22 AM
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Originally Posted by SOMbitch
FYI-you need a new tuner then..........OL runs richer for safety reasons.....
yeah sorry typo meant to put rich not lean...
Old 09-02-2009, 08:58 AM
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i agree with johncr96z on pretty much everything he said.
Old 09-02-2009, 09:13 AM
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Originally Posted by 99corvette
yeah sorry typo meant to put rich not lean...
The thermostat still has nothing to do with that.
Old 09-02-2009, 01:59 PM
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Originally Posted by NSSANE02
tunes out maf and relies on a constant air/fuel regulated by the tune. the tuner has to be spot on with the tune, its been done plenty and can actually gain more hp over just a regular dyno tune.
Old 09-02-2009, 02:35 PM
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Originally Posted by NeedaV8foundation
tunes out maf and relies on a constant air/fuel regulated by the tune. the tuner has to be spot on with the tune, its been done plenty and can actually gain more hp over just a regular dyno tune.
MAF/SD has nothing to do with open/closed loop.
Old 09-02-2009, 03:12 PM
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Originally Posted by NSSANE02
The thermostat still has nothing to do with that.
So your telling me the open closed loop system has nothing to do with the thermostat.....
Old 09-02-2009, 03:18 PM
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Originally Posted by NeedaV8foundation
tunes out maf and relies on a constant air/fuel regulated by the tune. the tuner has to be spot on with the tune, its been done plenty and can actually gain more hp over just a regular dyno tune.
I know what a speed density tune is, I'm running one. I just didn't understand what you were trying to relate it to. As JonCR96Z has already said, it has nothing to do with open/closed loop.
Old 09-02-2009, 03:20 PM
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Originally Posted by 99corvette
So your telling me the open closed loop system has nothing to do with the thermostat.....
Yes, that's what I'm telling you. The stock tune will go into closed loop before the thermostat opens, 160 degree or not.
Old 09-02-2009, 03:21 PM
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Man do a search, 99% of the people on here run rich with a 160 degree thermo

https://ls1tech.com/forums/generatio...termostat.html

https://ls1tech.com/forums/new-ls1-o...-160-stat.html
Old 09-02-2009, 03:28 PM
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You're telling me to search???

I didn't say it would make it run slightly rich or lean, I said it doesn't affect the open/closed loop operation.... do a search
Old 09-02-2009, 03:30 PM
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Look at my orginal post, you will make less power with a 160 degree thermostat...
Old 09-02-2009, 03:32 PM
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why else would it run rich or lean then if it had nothing to do with the open closed loop system
Old 09-02-2009, 03:33 PM
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Originally Posted by 99corvette
Man do a search, 99% of the people on here run rich with a 160 degree thermo

https://ls1tech.com/forums/generatio...termostat.html

https://ls1tech.com/forums/new-ls1-o...-160-stat.html
Those threads say nothing about running rich. 99% of the people who run 160 thermostats wouldn't know if they were rich or lean.

Is it plausible that something like that would have an effect on AFR? Maybe, but it would be such a tiny amount that on one would ever know and even then it would be corrected by the O2s once the system went into closed loop at 122 degrees ECT.
Old 09-02-2009, 03:35 PM
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Originally Posted by JonCR96Z
Those threads say nothing about running rich. 99% of the people who run 160 thermostats wouldn't know if they were rich or lean.

Is it plausible that something like that would have an effect on AFR? Maybe, but it would be such a tiny amount that on one would ever know and even then it would be corrected by the O2s once the system went into closed loop at 122 degrees ECT.

Yeah your probably right, but what i was saying is that my tuner can notice it on a laptop hooked up to HPtuners.
Old 09-02-2009, 03:46 PM
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Originally Posted by 99corvette
Look at my orginal post, you will make less power with a 160 degree thermostat...
This is your original post.
Originally Posted by 99corvette
160 degree thremo will keep it in open loop correct?
And my answer:
Originally Posted by NSSANE02
No, it goes into closed loop far before that.
I'll give you a minute to catch up, and hopefully you'll take your advice and do some searching.
Old 09-02-2009, 03:49 PM
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ok,,,my second post then...my bad
Old 09-02-2009, 03:55 PM
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Ok.
Originally Posted by 99corvette
My tuner told me that every car he has tuned with a 160 makes less power then the stock thermo. It runs rich cause its always in open loop.
I assumed by that post that the part in bold was stated by your tuner, either way, it is completely false. That's all I was trying to say, sorry if I lost you.
Old 09-02-2009, 04:04 PM
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From what i understand the thermostat will open up at 160. Its not gonna close back till the pcm reaches the original setting of 195. Thats why the temp gauge will still read 200 even though its not.

Last edited by 99corvette; 09-02-2009 at 04:31 PM.
Old 09-02-2009, 04:22 PM
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the BCM has nothing to do with the ECM comanding open/closed loop.

The thermo will open when the car hits 160 degrees. the car will run cooler than normal becuase coolant is circulating faster/more frequently through the Rad keeping the motor cooler. The reason the temp reads 200 on the dash cluster is because on 99+ motors its just an idiot gauge. HPTuners will show the correct temp the ecm is seeing though.


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