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Old 07-27-2012, 05:46 PM   #101
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Originally Posted by HPF Chris View Post
Don't be a jerk and start a rumor Kenton. I don't want to spend weeks defending unwarranted blown motor speculation from the haters of the world.

Ben's car has been plaguing us with fuel pressure issues. We are flow testing all the injectors now and monitoring fuel pressure. This has caused delays in our shop as the dyno has been tied up with this car as the guys have replaced everything related to the fuel system. It will be done shortly and we can then dyno Rico's and Noel's cars.

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I don't think he was being a jerk, I think he was just saying that it seems something bad happened because the updates have been pretty thin the last few days.

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Here you go. I took three different HPF Stage 2.5 M3's running the 6776S on pump gas. The top one is Ben's with the 6466 DBB and the FIC Injectors. Notice how much smoother the curve is with the FIC's and how the powerband is lifted at every RPM. We haven't been able to run methanol in Ben's car as the injector duty cycle goes too high when the boost is increased. We will have the fuel pressure/injector issue diagnosed shortly.

Looking forward to some more numbers with the fuel system 100%. Also interested in seeing a comparison with the 6766 vs 6466.
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Old 07-27-2012, 07:23 PM   #102
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Old 07-27-2012, 07:39 PM   #103
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Well figured something would get posted...glad my plan worked
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Old 07-27-2012, 08:37 PM   #104
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Well figured something would get posted...glad my plan worked
lol well played sir
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Old 07-27-2012, 09:54 PM   #105
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lol well played sir
nah, just compounding the situation.
just chill and let them work it out.
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Old 07-27-2012, 11:20 PM   #106
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By the look of the 6466 it makes 20hp and 40torque more than mine on pump. Im at 17psi. And it looks like the 6466 is running 20psi. I wondering why the 64 allows for more psi on pump? Maybe less heat because its smaller / more efficiency?

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Old 07-28-2012, 12:41 AM   #107
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By the look of the 6466 it makes 20hp and 40torque more than mine on pump. Im at 17psi. And it looks like the 6466 is running 20psi. I wondering why the 64 allows for more psi on pump? Maybe less heat because its smaller / more efficiency?

Being3
Normal boost for pump gas with out any meth spray is 16/17 psi maximum.
And 23psi max for high boost(pump plus meth, race gas, race gas plus meth)...for built motors.

I would like Chris to comment why we are seeing 20psi on a pump gas tune. That is pretty unusual.
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Old 07-28-2012, 06:58 AM   #108
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Beacuase thats the pressure it takes to make 600whp, which is fine on pump gas.

if it only took 2 psi or 30psi to make 600whp thats what he'd run as well. After all those posts/threads, it has been made clear that boost is just a the air not getting into the engine, and only has a slight correlation with power.
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Old 07-28-2012, 07:33 AM   #109
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Beacuase thats the pressure it takes to make 600whp, which is fine on pump gas.

if it only took 2 psi or 30psi to make 600whp thats what he'd run as well. After all those posts/threads, it has been made clear that boost is just a the air not getting into the engine, and only has a slight correlation with power.
It mainly has to do with size of turbo. Smaller turbo means more boost to make same power. The smaller turbo pushes less cfm at same psi vs a bigger turbo.

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Old 07-28-2012, 12:41 PM   #110
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It mainly has to do with size of turbo. Smaller turbo means more boost to make same power. The smaller turbo pushes less cfm at same psi vs a bigger turbo.

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Old 07-30-2012, 05:51 PM   #111
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John found the initial "In Tank" Walbro pump in Ben's car to be weak. He replaced it with a brand new Walbro pump and the fuel pressure still wasn't there. He replaced it with another Walbro pump and the fuel pressure still wasn't there. He took all three Walbro pumps and tested them outside the car and found one to be borderline and the other two were very weak. He tested them against the Aeromotive "In Tank" pump and the Aeromotive kicked the Walbro's butt. I'm not sure why these three Walbro's are not like the ones in the other cars we've done but they definitely are not flowing the same. We installed the Aeromotive pump in Ben's car and they are now tuning it with methanol.

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Old 07-30-2012, 06:45 PM   #112
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Quote:
Originally Posted by HPF Chris View Post
John found the initial "In Tank" Walbro pump in Ben's car to be weak. He replaced it with a brand new Walbro pump and the fuel pressure still wasn't there. He replaced it with another Walbro pump and the fuel pressure still wasn't there. He took all three Walbro pumps and tested them outside the car and found one to be borderline and the other two were very weak. He tested them against the Aeromotive "In Tank" pump and the Aeromotive kicked the Walbro's butt. I'm not sure why these three Walbro's are not like the ones in the other cars we've done but they definitely are not flowing the same. We installed the Aeromotive pump in Ben's car and they are now tuning it with methanol.

Chris.
Would the Bosch 044's be a more reliable alternative?
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Old 07-30-2012, 07:06 PM   #113
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^^^ What he said.....
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Old 07-31-2012, 03:13 PM   #114
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The smaller turbo pushes less cfm at same psi vs a bigger turbo.
this statement doesnt make any sense. cfm is a measure of volume per time and is the same regardless of psi or turbo in this application.
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Old 07-31-2012, 06:49 PM   #115
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Old 07-31-2012, 06:53 PM   #116
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Nice. Doesn't seem like meth or race fuel really did much extra for it. Full power on pump.
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Old 07-31-2012, 07:10 PM   #117
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Nice. Doesn't seem like meth or race fuel really did much extra for it. Full power on pump.
Pump and Race both run low boost.
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Old 07-31-2012, 07:34 PM   #118
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I know. I was looking at the pump vs the race/meth. There is less than a 100hp difference. That's good thing on our side. Pumps a lot cheaper than race fuel.

:Edit: didn't realize I put "or" between race and meth in my pervious post. My bad.
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Old 07-31-2012, 07:50 PM   #119
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Expected alot more from this turbo...ow well good pump power anyways.
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Old 07-31-2012, 07:59 PM   #120
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That looks like a super fun power curve for the streets! Them walbro's though....
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