Automobile Mag. Dyno Test of Sky Red Line - Page 4 - Saturn ION RedLine Forums
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post #31 of 44 (permalink) Old 09-28-2006, 07:53 AM
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What's the rev limiter set at in these cars? Everything seems to drop before it hit 6500??


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post #32 of 44 (permalink) Old 09-28-2006, 10:54 AM
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Quote:
Originally Posted by NoRemorse
GM is doing it with only ENGINE put into production after 2005.

Like she SRL's LNF.

It is comepltly voluntary though, automakers can choose to do it or not.
its going to have more power. that dyno was wack.

2002 black on black Corvette Z06
· LQ9 based 402 Stroker built by Charlie at RPM Motors
. AFR 225 cylinder heads 2.08/1.60 valves W/ Yella Terra 1.7 Roller Rockers
. Rx Dual Valve Oil Catch Can
. Custom ground blower spec cam
· A&A YSi Vortech Supercharger
. Kooks headers
· Textralia Exoskell Tripple disk clutch
· level V transmission and level IV diff DTE trans brace
· Custom Fuel System
· 6 Rib Direct Drive System.
· AEM Methanol Injection System
. A bunch of WHP gobs of WTQ.
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post #33 of 44 (permalink) Old 09-28-2006, 03:04 PM
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Quote:
Originally Posted by KSC
What's the rev limiter set at in these cars? Everything seems to drop before it hit 6500??
It's about 6300. The direct injection really dampers the rev limiter, because such great pressure is needed to pour the fuel directly into the cylinder. Our injection (before the cylinders) is about the 50-100 bar magnitude. Direct injection requires in the magnitude of 1000 bars. When you get the engine spinning that fast, it's harder to control that fuel. Besides, before the 6300rpm limit, you see the power curves already reaching their peak and falling, so a higher limiter won't do any good unless other mods supported it.

Quote:
Originally Posted by Ahriman
this makes me very sad... and mad... im sad and mad.... im smad
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post #34 of 44 (permalink) Old 09-28-2006, 03:24 PM
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Quote:
Originally Posted by jpapa
It's about 6300. The direct injection really dampers the rev limiter, because such great pressure is needed to pour the fuel directly into the cylinder. Our injection (before the cylinders) is about the 50-100 bar magnitude. Direct injection requires in the magnitude of 1000 bars. When you get the engine spinning that fast, it's harder to control that fuel. Besides, before the 6300rpm limit, you see the power curves already reaching their peak and falling, so a higher limiter won't do any good unless other mods supported it.
I was reading into this engine a lot last week (and of course can't seem to find the info now cause I'm at work and dont have the time to look) but because of the direct cylinder fueling, tuning could be very hard. The littlest changes produce big results, both good and bad. It's not going to be a machine to fine tune because of this. Opening and closing pulse width by even .1 sec could make a huge difference due to the fuel pressure it will be running, and we all know huge differences arent good for fine tuning

2004 Ion REDLINE

Installed:
LC-1 Wideband O2 sensor
2.5" Pulley
60# Injectors
dan.SPEC custom tune
ZZP 3" DP w/o cat

est WHP ~ 270hp on stock intake
Dyno and 1/4mi slips hopefully soon!!!
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post #35 of 44 (permalink) Old 09-28-2006, 03:28 PM
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Quote:
Originally Posted by nduchene
I was reading into this engine a lot last week (and of course can't seem to find the info now cause I'm at work and dont have the time to look) but because of the direct cylinder fueling, tuning could be very hard. The littlest changes produce big results, both good and bad. It's not going to be a machine to fine tune because of this. Opening and closing pulse width by even .1 sec could make a huge difference due to the fuel pressure it will be running, and we all know huge differences arent good for fine tuning
bah... that's an excuse... look for answers, not excuses...

Remember, a 2.8" pulley will blow up your car too...




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post #36 of 44 (permalink) Old 09-28-2006, 03:53 PM
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Quote:
Originally Posted by jpapa
Our injection (before the cylinders) is about the 50-100 bar magnitude. Direct injection requires in the magnitude of 1000 bars. it.
I think you're confusing diesel direct injection (16-24:1 compression) to gasoline direct injection (8.5-11:1).

Edit: but looking at how the duramax has been tuned is a good idea to determine where to go with this.

Ok, so, like, yeah, umm....
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post #37 of 44 (permalink) Old 09-28-2006, 03:56 PM
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the damn SKy redline should be putting out more power then it is but given some of the component choices. its very nice for a car like that. still not quite to the redline standards IMHO

2002 black on black Corvette Z06
· LQ9 based 402 Stroker built by Charlie at RPM Motors
. AFR 225 cylinder heads 2.08/1.60 valves W/ Yella Terra 1.7 Roller Rockers
. Rx Dual Valve Oil Catch Can
. Custom ground blower spec cam
· A&A YSi Vortech Supercharger
. Kooks headers
· Textralia Exoskell Tripple disk clutch
· level V transmission and level IV diff DTE trans brace
· Custom Fuel System
· 6 Rib Direct Drive System.
· AEM Methanol Injection System
. A bunch of WHP gobs of WTQ.
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post #38 of 44 (permalink) Old 09-28-2006, 04:04 PM
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Quote:
Originally Posted by fullthrottle
the damn SKy redline should be putting out more power then it is but given some of the component choices. its very nice for a car like that. still not quite to the redline standards IMHO

Well if you think about it...Saturn is at a 30% for Redline standards. The VUE's new fascias was not really enough to make it a Redline in my mind. The Sky RL is definately alot closer than that..lol

2004 ION Redline ...dewinged...

SPS Front Strut Tower Brace, BWoody Traction Bars that need fixed, Weapon R Short Ram Intake w/AEM Dryflow Filter, ZZP MPS w/ 3.0" pulley, empty cat and Magnaflow 2.5" Exhaust
...and I'm spent...

See my other
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post #39 of 44 (permalink) Old 09-28-2006, 04:12 PM
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Quote:
Originally Posted by Sp00ner
bah... that's an excuse... look for answers, not excuses...

Remember, a 2.8" pulley will blow up your car too...
Never said I wouldnt try Preliminary looks say this is gonna be tough

2004 Ion REDLINE

Installed:
LC-1 Wideband O2 sensor
2.5" Pulley
60# Injectors
dan.SPEC custom tune
ZZP 3" DP w/o cat

est WHP ~ 270hp on stock intake
Dyno and 1/4mi slips hopefully soon!!!
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post #40 of 44 (permalink) Old 09-28-2006, 04:21 PM
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Quote:
Originally Posted by nduchene
I was reading into this engine a lot last week (and of course can't seem to find the info now cause I'm at work and dont have the time to look) but because of the direct cylinder fueling, tuning could be very hard. The littlest changes produce big results, both good and bad. It's not going to be a machine to fine tune because of this. Opening and closing pulse width by even .1 sec could make a huge difference due to the fuel pressure it will be running, and we all know huge differences arent good for fine tuning
That's what I originally tried to tell people in this thread when it was first made, I believe I have a post talking about this on the first page.

I know it could be an excuse sp00ner, but it's definetely going to be a lot fussier to tune than our cars, and you have first hand experience in tuning our cars. Direct injection for us gasoline guys is really a pretty new system and concept, so us spark ignition guys don't have too much experience with tuning these types of engines. There have been a few gasoline DI engines in the past from different companies, so sources into modifying the fuel systems in those will be helpful, as well as learning about the diesel systems.

Quote:
Originally Posted by Ahriman
this makes me very sad... and mad... im sad and mad.... im smad
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