The Z06 is STILL not ready!
Discussion
Flippin heck, still not sorted time to bang a few heads together, surely its not rocket science 
I'm pee'd for ya, I want to see this car run fast and be reliable to.
Does it have a piggy back ECU like Nad's where you just swipe a plastic card for different octanes/settings, or is the vette ECU trying unsuccesfully to figure it out ?
What do they use in USA to control the fuel on turbo systems ?
I'm pee'd for ya, I want to see this car run fast and be reliable to.
Does it have a piggy back ECU like Nad's where you just swipe a plastic card for different octanes/settings, or is the vette ECU trying unsuccesfully to figure it out ?
What do they use in USA to control the fuel on turbo systems ?
what is it doing , is it running lean ect.Have you run it with a wide band o2 sensor if so where are you at on wot.Timing aswell , have you got a boost sensitive map sensor or are you pulling timing out via a rpm setting {ie , 4500rpm = 24deg , 5000rpm = 23deg. and so on , or 1 deg per lb of boost} on ls1 edit or motec set up.You should be able to run 8 to 10 psi of boost on pump fuel and keep the pistons in it no problem , im sure its just a tuning issue and dyno time with the right equipment will sort it , but watch out for things like fuel octane as 98 opimax aint the same as 98 in the states , proberly nearer to 92 0r so .Good luck
>> Edited by blown 5.0 on Monday 30th August 01:41
>> Edited by blown 5.0 on Monday 30th August 01:41
The guys in the US seem to be able to run about 7-8psi on an otherwise stock engine, with CR as high as 10.5:1 using pump fuel, on a turbocharged, intercooled setup.
I think the US 93 MON fuel, is equivalent to the UK 98 RON fuel, although our fuel is probably worse than its supposed to be.
Obviously the engine needs mapped properly for this.
I would have thought, that the suppliers of the turbo kit should have supplied an ecu with a map close enough that it should drive pretty well.
I think the US 93 MON fuel, is equivalent to the UK 98 RON fuel, although our fuel is probably worse than its supposed to be.
Obviously the engine needs mapped properly for this.
I would have thought, that the suppliers of the turbo kit should have supplied an ecu with a map close enough that it should drive pretty well.
Sunnyzr1 said:
If I am not wrong, the isue is the engine running lean on fuel, they were going to try a new pump setup with a primer and an in-line pump.
The guys running turbos in the US rely in the stock fuel pump?
Pretty sure they do, it's a waltham iirc. Sometimes for high output cars they may use larger injectors. If this is a kit that's being installed it should have some instructions.
A good place to ask is LS1 Tech in the corect forum.
www.ls1tech.com/forums/
The fuel system is completely bespoke on my car as good old GM designed possibly the most difficult system that they could for the later model C5.
As a result it has been very hard work having to replace large parts of the system whilst working with the existing tanks.
As a result I have what should be a great system as it now has the capability to delivery the required amount of fuel on demand to the engine.
Problem is when you disturb any system involving fluids you get leaks.....I know I spent most of Sunday trying to stop the sink and toilet leaking after I took them out to replace the floor in the bathroom
My frustration is the car is so close to being finished, but I can't drive it as it has a fuel leak on the crossover pipe that runs between the 2 tanks.
On the leaning out issue, the car now has a Motec 800 ECU and therefore it is mapped fine and will not run lean.
On the Americans running at 7-8 psi issue, it is all well and good on the stock system, but if you run the car for more than a few seconds at WOT it will start to loose fuel pressure as the fuel rail and in-tank pumps cannot deliver enough fuel fast enough. A lot if them are finding this is an issue if you check out some of the postings on the Corvette Forum. The ones that haven't don't drive their cars hard or they would find the same issue!
As a result it has been very hard work having to replace large parts of the system whilst working with the existing tanks.
As a result I have what should be a great system as it now has the capability to delivery the required amount of fuel on demand to the engine.
Problem is when you disturb any system involving fluids you get leaks.....I know I spent most of Sunday trying to stop the sink and toilet leaking after I took them out to replace the floor in the bathroom
My frustration is the car is so close to being finished, but I can't drive it as it has a fuel leak on the crossover pipe that runs between the 2 tanks.
On the leaning out issue, the car now has a Motec 800 ECU and therefore it is mapped fine and will not run lean.
On the Americans running at 7-8 psi issue, it is all well and good on the stock system, but if you run the car for more than a few seconds at WOT it will start to loose fuel pressure as the fuel rail and in-tank pumps cannot deliver enough fuel fast enough. A lot if them are finding this is an issue if you check out some of the postings on the Corvette Forum. The ones that haven't don't drive their cars hard or they would find the same issue!
I have read many threads, and very very few people rely on the stock pump when modifying.
Most go for Walbro pump, or on some occasions use two.
Some also use a Racetronix fuel pump.
The Aeromotive is good, but rather large, and not designed for in-tank use. So would be difficult to modify the tank/fuel lines to adequately feed it.
They also modify the stock fuel rails so they have a return, as per most efi systems. ( Your car may have already had this though, but many LS1 engines do not, and use a returnless/dead end system )
Motec is a good route to take, but extremely expensive, when for a few hundred dollars, LS1 edit has proven itself in cars with over 800bhp.
Although The user would need to learn to use LS1 Edit.
The Motec ecu would be easier to get to grasps with, as many have used it already in the UK.
So is the car going properly now ?? How is it going ??
Most go for Walbro pump, or on some occasions use two.
Some also use a Racetronix fuel pump.
The Aeromotive is good, but rather large, and not designed for in-tank use. So would be difficult to modify the tank/fuel lines to adequately feed it.
They also modify the stock fuel rails so they have a return, as per most efi systems. ( Your car may have already had this though, but many LS1 engines do not, and use a returnless/dead end system )
Motec is a good route to take, but extremely expensive, when for a few hundred dollars, LS1 edit has proven itself in cars with over 800bhp.
Although The user would need to learn to use LS1 Edit.
The Motec ecu would be easier to get to grasps with, as many have used it already in the UK.
So is the car going properly now ?? How is it going ??
To answer your questions etc.
Racetronics don't do a system for the FFS fuel system on a 2003 Z06 (not yet anyway).
The Bosch pumps are more than capable of delivering the fuel and the new fuel rail should be able to cope fine.
The Motec is very expensive and has involved re-wiring most of the car which is also expensive.
LS1 Edit was the original route taken but proved almost impossible to get to work. The software works fine, but it has no interactive function and therefore you load the file onto the p.c. then change stuff then load it back to the car. This process takes ages as you have to reload every change, you cannot use it interactively.
Racetronics don't do a system for the FFS fuel system on a 2003 Z06 (not yet anyway).
The Bosch pumps are more than capable of delivering the fuel and the new fuel rail should be able to cope fine.
The Motec is very expensive and has involved re-wiring most of the car which is also expensive.
LS1 Edit was the original route taken but proved almost impossible to get to work. The software works fine, but it has no interactive function and therefore you load the file onto the p.c. then change stuff then load it back to the car. This process takes ages as you have to reload every change, you cannot use it interactively.
Have you seen this? Similar device works well on my supercharger but needs a 2 or 3 bar MAP.
www.carrollsupercharging.com/
TURBOFUELER™ is a unique electronic programmable supplemental fuel injector control system. It consists of two modules; a programmable Fuel Curve Generator (FCG) and a peak-and-hold injector driver (PHD) with which you can control from 1 to 8 supplemental fuel injectors. The TURBOFUELER™ allows the user to adjust, in small increments, the amount of extra fuel supplied to the engine based upon two inputs: engine RPM and Manifold pressure. The tuner weights these inputs as desired and thus "maps" the fuel curve.
www.carrollsupercharging.com/
TURBOFUELER™ is a unique electronic programmable supplemental fuel injector control system. It consists of two modules; a programmable Fuel Curve Generator (FCG) and a peak-and-hold injector driver (PHD) with which you can control from 1 to 8 supplemental fuel injectors. The TURBOFUELER™ allows the user to adjust, in small increments, the amount of extra fuel supplied to the engine based upon two inputs: engine RPM and Manifold pressure. The tuner weights these inputs as desired and thus "maps" the fuel curve.
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