do guru chips adjust rev limit?
do guru chips adjust rev limit?
09-17-2002, 01:09 AM
#3
Race Director
Nope, we keep the factory redline at 6480rpm. No use revving too high since the torque drops off fairly quickly. Also the stock injectors hit 100% duty-cycle at around 5500-6000rpm and at 6500rpm, the mixture has gone from 12.5:1 up to about 13.2:1 which is about as lean as we want to go.
On a street car that sees occasional acceleration runs and spends minimal time in the uppper RPMs, this isn't too much of a concern. But track-driven cars that see full-throttle at high-RPMs for extended periods can blow headgaskets easily of we allow them to rev much higher. In which case, upgrading the injectors to 55-lb/hr to reduce the duty-cycle down to a more reasonable 63% is advisable.
On a street car that sees occasional acceleration runs and spends minimal time in the uppper RPMs, this isn't too much of a concern. But track-driven cars that see full-throttle at high-RPMs for extended periods can blow headgaskets easily of we allow them to rev much higher. In which case, upgrading the injectors to 55-lb/hr to reduce the duty-cycle down to a more reasonable 63% is advisable.
09-17-2002, 10:16 AM
#7
Nordschleife Master
[quote]Originally posted by Levish:
<strong>you'd need a chip for that particular application (injector size)
nothing beats fine tuning and customizing the combo</strong><hr></blockquote>
But we are talking about the Guru Racing chips here and they have a switch for different injector sizes...
But yes, fine tuning and customizing is of course better. But at the same time much more expensive..
<strong>you'd need a chip for that particular application (injector size)
nothing beats fine tuning and customizing the combo</strong><hr></blockquote>
But we are talking about the Guru Racing chips here and they have a switch for different injector sizes...
But yes, fine tuning and customizing is of course better. But at the same time much more expensive..
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09-17-2002, 10:37 AM
#8
Race Director
Yup, our chips are switchable between the stock 34.6-lb/hr injectors as well as aftermarket 55/65/75-lb/hr ones as well. The duty-cycle is scaled back precisely to the percentage difference between the flow rates to provide exactly the same amount of fuel.
There is also a secondary aggressive ignition map that's available for people who want to use 96-octane gasoline (2-gallons toluene per tank or 50/50 mix with 100-octane race gas).
There is also a secondary aggressive ignition map that's available for people who want to use 96-octane gasoline (2-gallons toluene per tank or 50/50 mix with 100-octane race gas).
09-17-2002, 12:28 PM
#10
Drifting
Join Date: Jun 2001
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[quote]Originally posted by Russ Murphy:
<strong>Danno,
How do you "toggle" between the injector settings and the secondary timing map?</strong><hr></blockquote>
Via the FQS (fuel quality) rotary switch.
Danno has a great write up on his Racer X site.
<img src="graemlins/xyxwave.gif" border="0" alt="[bigbye]" />
<strong>Danno,
How do you "toggle" between the injector settings and the secondary timing map?</strong><hr></blockquote>
Via the FQS (fuel quality) rotary switch.
Danno has a great write up on his Racer X site.
<img src="graemlins/xyxwave.gif" border="0" alt="[bigbye]" />
