Well we have a minor set back-dyno #'s ARE LOW!
06-24-2010, 07:25 AM
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Well we have a minor set back-dyno #'s ARE LOW! I've been holding off on posting this in pure disbelief honestly. I had the car dynoed this week and to say its low is a understatement. This is on the same dyno I always dynoon a dyno jet 224, same tires/wheels. With the following mods to the car.
2008 Z06 bone stock 50* day 463rwhp uncorrected-447rwhp SAE
Added Stainless works 3in catback, ported TB and ported intake-437rwhp SAE really hot day 88*
Added-ARH long tubes, off road xpipe, Fast 102,160tstat, LPE cold air w/100mm MAF, new plugs TR6, new oil,new wires., tuned,Hot day 92* -- 476rwhp 460rwtq SAE
These are cookie cutter mods. They aren't heads, cams, etc that can vary from car to car grealy. The car should be putting out 500rwhp or damn close or over typically. We tried, running the car no air filter to see if the car would act up, car will only accept about 22-23*degrees of timing w/o a slight amount of spark knock. Partly why we went TR6 plugs to help reduce knock. The car is down atleast 25-30rwhp atleast! I'm completely baffled with this. No codes, nothing weird tuning wise. Car runs ok, drove it and yes it feels faster BUT it doesnt feel like 500rwhp either. No exhaust leaks, no intake leaks, no crazy things from the o2 sensors. I'm baffled right now.
2008 Z06 bone stock 50* day 463rwhp uncorrected-447rwhp SAE
Added Stainless works 3in catback, ported TB and ported intake-437rwhp SAE really hot day 88*
Added-ARH long tubes, off road xpipe, Fast 102,160tstat, LPE cold air w/100mm MAF, new plugs TR6, new oil,new wires., tuned,Hot day 92* -- 476rwhp 460rwtq SAE
These are cookie cutter mods. They aren't heads, cams, etc that can vary from car to car grealy. The car should be putting out 500rwhp or damn close or over typically. We tried, running the car no air filter to see if the car would act up, car will only accept about 22-23*degrees of timing w/o a slight amount of spark knock. Partly why we went TR6 plugs to help reduce knock. The car is down atleast 25-30rwhp atleast! I'm completely baffled with this. No codes, nothing weird tuning wise. Car runs ok, drove it and yes it feels faster BUT it doesnt feel like 500rwhp either. No exhaust leaks, no intake leaks, no crazy things from the o2 sensors. I'm baffled right now.
Last edited by Zturd; 06-24-2010 at 08:13 AM.
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06-24-2010, 09:02 AM
#8
Why Tr6's?
Maybe they are fouled out?
I ran Tr6's on my 13:1cr 441 and they would foul out all the time just street driving around. I had to replace them when I got to the track or when I had to dyno, otherwise I would drive around on tr55's.
They may not look fouled, try replacing them "on" the dyno then try again maybe?
Maybe they are fouled out?
I ran Tr6's on my 13:1cr 441 and they would foul out all the time just street driving around. I had to replace them when I got to the track or when I had to dyno, otherwise I would drive around on tr55's.
They may not look fouled, try replacing them "on" the dyno then try again maybe?
06-24-2010, 09:03 AM
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06-24-2010, 09:07 AM
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Why Tr6's?
Maybe they are fouled out?
I ran Tr6's on my 13:1cr 441 and they would foul out all the time just street driving around. I had to replace them when I got to the track or when I had to dyno, otherwise I would drive around on tr55's.
They may not look fouled, try replacing them "on" the dyno then try again maybe?
Maybe they are fouled out?
I ran Tr6's on my 13:1cr 441 and they would foul out all the time just street driving around. I had to replace them when I got to the track or when I had to dyno, otherwise I would drive around on tr55's.
They may not look fouled, try replacing them "on" the dyno then try again maybe?
Slowhawk.... You know I really value your opinion with the car. Any idea's? I think you would agree tuned the car should be higher on a dynojet 224? You typically see a around 440-450 stock is usually what i've seen on the a-typical dyno's unless they are happy dyno's IMO. Do we see more chances for spark knock with the hotter TR55?
06-24-2010, 09:38 AM
#13
I run TR6's gapped at .040. They are a very versitile plug.
As for timing, I've never/ever gone more than 22 peak on a Z06.Most of them are 18-20 degree's.You can hit 24 on a dynojet because most of them don';t have enough load.Then it kr's on the street.
The Z06's and pretty much any E-38 computer is tricky to tune right.GM makes the knock sensors way too sensative and there are a few tables in there that delay fuelling and timing changes. Sometimes the scanner will show the correct timing but it is actually false to what the engine is getting.
As for timing, I've never/ever gone more than 22 peak on a Z06.Most of them are 18-20 degree's.You can hit 24 on a dynojet because most of them don';t have enough load.Then it kr's on the street.
The Z06's and pretty much any E-38 computer is tricky to tune right.GM makes the knock sensors way too sensative and there are a few tables in there that delay fuelling and timing changes. Sometimes the scanner will show the correct timing but it is actually false to what the engine is getting.
06-24-2010, 10:59 AM
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It has the stock MAF. You use the same cartridge with the MAF housings. I didnt put the 100mm MAF from LPE in. I used a Vararam Sample tube as they call it which is 100mm housing. Didnt clean it yet!
06-24-2010, 11:12 AM
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I run TR6's gapped at .040. They are a very versitile plug.
As for timing, I've never/ever gone more than 22 peak on a Z06.Most of them are 18-20 degree's.You can hit 24 on a dynojet because most of them don';t have enough load.Then it kr's on the street.
The Z06's and pretty much any E-38 computer is tricky to tune right.GM makes the knock sensors way too sensative and there are a few tables in there that delay fuelling and timing changes. Sometimes the scanner will show the correct timing but it is actually false to what the engine is getting.
As for timing, I've never/ever gone more than 22 peak on a Z06.Most of them are 18-20 degree's.You can hit 24 on a dynojet because most of them don';t have enough load.Then it kr's on the street.
The Z06's and pretty much any E-38 computer is tricky to tune right.GM makes the knock sensors way too sensative and there are a few tables in there that delay fuelling and timing changes. Sometimes the scanner will show the correct timing but it is actually false to what the engine is getting.
I believe the plugs come gapped at .035. Opening the gap slightly to .040 would increase or not change spark knock possibilities?
Could the devil have crawled into my motor and took a ****?
06-24-2010, 11:13 AM
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OK who's coming to cecil tomorrow nite to log some runs to report back with what the car is doing.
What do we think a good MPH will be with the car in 85-90* day at cecil? I'm guessing around 128mph should be my goal in the warmer weather and will have me closer to the 132mph I want to be at in the winter.
What do we think a good MPH will be with the car in 85-90* day at cecil? I'm guessing around 128mph should be my goal in the warmer weather and will have me closer to the 132mph I want to be at in the winter.