Buschur Racing twin Walbro review w/ DLL dyno and datalogs @ 30psi 93 octane
Apr 19, 2008, 05:47 PM
#33
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nah, I just filled it up, it came out to 17mpg after all that hard running dialing the tune in and just plain raising hell every chance I get. I think it would do 20mpg + easily if I drove it right.
May 15, 2008, 01:14 PM
#34
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well I haven't done the math yet but I've been driving the car like a sane person the whole take of gas aside from a couple of 1/4 mile pulls I did here and there. I'm not trying to get good gas mileage, just driving it normally which means often seeing 10-20psi during part throttle sprints from stop light to stoplight etc.. This is a 50/50 mix of city and highway for the most part.
I filled up last week and I'm currently at 286 miles on this one tank, I could probably stretch it to 300 but I don't want to risk running out of gas on the interstate. I suspect I'm in the 20-22mpg area..pretty similar to when it was bone stock. Not bad for twin fuel pumps and 1000cc injectors with some spirited city/interstate daily driving.
If I run the car hard the whole tank I'd be lucky to see 150 miles like when I was dialing in the tune.
I filled up last week and I'm currently at 286 miles on this one tank, I could probably stretch it to 300 but I don't want to risk running out of gas on the interstate. I suspect I'm in the 20-22mpg area..pretty similar to when it was bone stock. Not bad for twin fuel pumps and 1000cc injectors with some spirited city/interstate daily driving.
If I run the car hard the whole tank I'd be lucky to see 150 miles like when I was dialing in the tune.
May 16, 2008, 06:56 AM
#36
The switch is advertised at 6 psi, I have no checked them personally other than when we install them we give them a quick test to make sure the 2nd pump comes on. It is for sure not 16 psi.
I have never tuned a stock ECU car with a double pumper, with the stand alones it is a non issue as to when it comes on.
I have never tuned a stock ECU car with a double pumper, with the stand alones it is a non issue as to when it comes on.
May 16, 2008, 06:57 AM
#37
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yes I verified it on mine but I wouldn't assume they are all set the same. I spent quite a bit of time on that area of vacuum to 3psi and have it working pretty well now. You can't tell when the second pump comes on anymore and gas mileage is ~ 22mpg which isn't bad for a 500awhp daily driver
May 16, 2008, 11:33 AM
#38
David/Mellon,
Thanks for the replies. I was thinking it was closer to 6psi personally when tuning my car that is where i noticed the fuel needed tweaking that i wasn't expecting. I was planning on testing it one day but with the 6psi comment I am happy with that.
BTW Thanks for such an easy and reliable solution fuel soluition David. I have installed one on my car, and a friends. Saved us incredible amounts of money vs. other systems!
Thanks for the replies. I was thinking it was closer to 6psi personally when tuning my car that is where i noticed the fuel needed tweaking that i wasn't expecting. I was planning on testing it one day but with the 6psi comment I am happy with that.
BTW Thanks for such an easy and reliable solution fuel soluition David. I have installed one on my car, and a friends. Saved us incredible amounts of money vs. other systems!
May 19, 2008, 05:19 AM
#41
You’re welcome David. I have referred several people to the fuel system when they ask what I use. Hopefully it has resulted in some purchases of the system. 
Just finished up an install on a friends Evo, Buschur everything basically. Tuned the car to make up for the added fuel, and turned the boost up to 26psi (FINALLY! Read below) on 93 octane gas. He wasn't ready to push much higher on pump just yet but I think that will change after I showed him some logs on how quiet and smooth the engine is. The A/F curve is so smooth and consistent between runs, it literally took just over a handful a pulls to get it right where I wanted it.
Needless to say the car is very strong (Buschur 37r kit/Stage 3 block/race head etc.) and we are looking to get race gas in the tank really soon. Was a complete dream to dial in, only issue we have is with electronic boost control through AEM which limited me before when tuning this car. A couple months ago it did make 475hp @ 22lbs on a local Dyno that is said to read fairly low, so I am curious what it will make now. Error control functions don’t see the correct boost so it tries to always remove duty % and over correct things so the car simply won’t go above 22lbs (which it didnt even get that high sometimes) when turned on. No matter what I set the boost to 20PSI through 28PSI, and changing the duty cycle results the same, 22lbs max. It's very strange as the car is setup nearly identical to mine and using same boost solenoid that I have and my boost its quiet easy to get where I want it. It has to be AEM related for it to see the boost is so far off, when that isn’t the case.
Ended up tuning the car without the error control using a different method and its hitting 26lbs and holding +/- .5lbs consistently. The owner is one happy camper.
Just finished up an install on a friends Evo, Buschur everything basically. Tuned the car to make up for the added fuel, and turned the boost up to 26psi (FINALLY! Read below) on 93 octane gas. He wasn't ready to push much higher on pump just yet but I think that will change after I showed him some logs on how quiet and smooth the engine is. The A/F curve is so smooth and consistent between runs, it literally took just over a handful a pulls to get it right where I wanted it.
Needless to say the car is very strong (Buschur 37r kit/Stage 3 block/race head etc.) and we are looking to get race gas in the tank really soon. Was a complete dream to dial in, only issue we have is with electronic boost control through AEM which limited me before when tuning this car. A couple months ago it did make 475hp @ 22lbs on a local Dyno that is said to read fairly low, so I am curious what it will make now. Error control functions don’t see the correct boost so it tries to always remove duty % and over correct things so the car simply won’t go above 22lbs (which it didnt even get that high sometimes) when turned on. No matter what I set the boost to 20PSI through 28PSI, and changing the duty cycle results the same, 22lbs max. It's very strange as the car is setup nearly identical to mine and using same boost solenoid that I have and my boost its quiet easy to get where I want it. It has to be AEM related for it to see the boost is so far off, when that isn’t the case.
Ended up tuning the car without the error control using a different method and its hitting 26lbs and holding +/- .5lbs consistently. The owner is one happy camper.
May 19, 2008, 02:35 PM
#42
itzwolf, I am pretty busy making double pumpers so I am sure your referrals have helped. I appreciate it!
As for the boost control. I tried it and swore by it on the dyno. This was about 2 years ago. Then when the car hit the streets the boost was not consistent. I am back to what I like the most now and won't ever switch again, good old manual controller. With the dual stage we are making I can't ask for more.
As for the boost control. I tried it and swore by it on the dyno. This was about 2 years ago. Then when the car hit the streets the boost was not consistent. I am back to what I like the most now and won't ever switch again, good old manual controller. With the dual stage we are making I can't ask for more.
Jun 23, 2008, 04:43 AM
#45
Last edited by itzwolf; Jun 23, 2008 at 09:57 AM.