Hi guys, I am here to answer your questions and see what we can make happen for the Aus based Speeds.
There are a lot of questions and I am going to try and answer them in one post.
The Stage 1 fuel pumps are for the stock turbo cars or low boost big turbo car. Do not get a Stage 2 fuel pump if you are a stock turbo car, it will build to much pressure and shut down the injectors because of over pressure at the injector head.
Stage 2 fuel pumps support big turbo cars and come with a new modified hard line that goes from the fuel pump to the fuel pump rail.
I really want to keep this as a fuel pump only GB due to the ease of install and we don't have to worry about possible dirt or installer error (not saying anyone is not qualified to install these, we just don't want to take any chances). If you are interested in a set of fuel pump internals, please PM me.
I am willing to offer all our products up for GB pricing, so if you see something you like on the website please contact me about combo pricing to go with your fuel pump.
I would like to see 10 fuel pumps sold as units in order to make this GB happen, Stage 1 or Stage 2 will both count towards the GB.
If you have any other questions, feel free to contact me or post up in this thread.
Thanks,
John
---------- Post added at 01:31 PM ---------- Previous post was at 01:29 PM ----------
Yes, 500 psi could become a problem. Post the log and I will give my .02
Thanks,
John
Have taken a log this morning on the Dash hawk, I will post it up tonight, pressures were doing the same thing again this morning dropping to ~3700 kpa at full noise, driving fine at low boost / revs scenarios.....for now.
Just a question for you John, on a bolted car with stock turbo (and a couple of extra pounds boost), what are the benefits in fitting one of your High pressure rail relief valves, and which pressure spec option should be fitted, I noticed on your other site there isn't a pressure option for this item. What is involved in the install of this part.
Just took a photo of the log replay on the Dashhawk, you can see the fuel pressure dropping to 533psi (the display is showing kpa, but the value is psi) at high rpm, the boost is also dropping off, no doubt as a preservation method from the ECU.
Also the 13:1 afr is a little concerning, probably very fortunate the WMI is there to help prevent knock, I think I need to drive sensibly till I get this fixed.
Last edited by MattMPS3; 27-10-2011 at 08:48 AM.
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Hi John, welcome to ozmps. With the stage 2, due to the increase pressure, do you need to change the injector seals and relief valve as well?
Hi John - thanks for coming in to answer all our questions!
Do you think a fuel pump alone would give us more power?
I would say probably not, unless you are experiencing fuel pressure issues in the first place
Maybe.. Pending another dh log now i have my hypertech back lol
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Yes, drive it out of boost for right now. The ECU is cutting boost and under self preservation right now. I am also going to recommend a new high pressure pump for you there could be other issues with your fuel pump that could be missed if you just did fuel pump internals. Also, get your low pressure pump checked. We have seen a rash of low pressure fuel pump failures lately, this will cause the exact same condition you are seeing in your logs. The rail valve really has very little benefit with the stock turbo. Install is very easy, if you look right behind your t-body (between the block and your t-body) you will see a fuel line with a yellow clip on it. There should be a brass colored fitting that the fuel line attaches to, that is your rail valve. It takes 20 minutes to replace it with the proper tools and the car cold. Car warm and no proper tools, you are going to be at it for a while.
Thank you for having me, . We recommend a replacement rail valve with all our S2 fuel pumps. Injector seals are needed when you start boosting over 20 psi, big turbo or stock it really doesn't matter. The injector seals blow from cly pressure and 20 psi seems to be the magic number that causes them to fail.
Remember that we only recommend the S2 fuel pump for those running much bigger turbo set ups, the stock turbo will over fuel and pretty much shut down with the S2 fuel pump.
Any time and thank you for the invite.
That is a great question. We have independent testing that has shown 1900 psi of fuel pressure gives the best flame front and optimal burn for the stock turbo and mid frame (larger) turbos. Additional dyno testing has verified this with gains of 18 to 22 WHP when moving from 1500 psi (stock fuel pump at redline) to 1900 psi only (fuel pressure change and AFR adjust to OEM settings). Will the pump give you more power... yes, but you have to tune the additional fuel out due to the added fuel pressure. I hope this helps.
We also did additional testing with larger frame turbos (59mm and up compressor wheels) and we found that 2030 is optimal for these cars. Dyno testing confirms that there is up to 27 WHP to be gained from getting the fuel pressure to this limit on large turbo set ups.
Hope this helps.
This is normally what we see, fuel pressure issues or fuel pressure that is falling off at 5500 RPM. Its amazing how much better the car feels under boost with proper fuel pressure.
Bingo! That is where the gains really come from, a proper tune mated to higher fuel pressures is always a benefit for the tune!
Thanks guys for the great turnout and all the great questions.
I did want to mention that we are now "Pro Tuners" for the MazdaSpeed platform under Cobb, so if any of you guys buy a fuel pump with a rail valve we can adjust your fuel tables for you so they make these target fuel pressures. Being a full Pro Tuner allows us to tune the cars overseas now as well (if you have an application with the Cobb AP that works). If you want a full email tune we can talk about this at a later date or PM me.
Cheers,
John
Last edited by hpfpupgrade; 28-10-2011 at 08:21 AM.
Sadly, the AP is not supported on the mps. Not sure if any members have purchased one for attempt.
Emails replied indicating there will be no AP support outside US
I thought people were swapping the US based ECU with success? Is there any need for a quality tuning device in Aus?
I don't know what it would take but I am sure that Cobb would look into making something if there was a demand for it. If you think that there is, let me know and I will talk with the guys over at Cobb.
Cheers,
John
Hi John,
I haven't heard of anyone here swapping out their ECU for a US one. Not sure what the ramifications of that would be.
Currently in terms of "tune in a box" solutions for the Aus market, there's the Hypertech Max Energy Sport, which a number of people use. There's also now the VersaTune, which TD here has been Beta Testing for them for the Aus Market. It's currently been released for Gen I MPS (Mazdaspeed 3 and 6 I believe). Currently no support for the Gen II, though I believe it's not far away.
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This is great reading. Thanks for dropping in John.
Agreed, theres a good old debate about this fuel pump issues. I really think i should get some sorta data logging equipment to see what this is all about and whether its actually happening on my car. It seems like theres alot of different sides of thinking on this one.... Some say stock pump is good for 300+ hp etc..
Current:
CP-e: Xcel Nano Intake/ Nviscid TIP/ TMIC/ HPFP/ Stage 2 REM/xFlex Driv/ Pass EM 75/ UR 3" Turbo- Back Exhaust/ RichTune Custom/ HKS SSQV Typ 3/ DBA 4000 Rotors/ Remsa Pads/ Tein SS Coilovers/ Whiteline (F&R) Sway Bars/ AutoExe: Turbo Suction Kit/ Strut Tower Bar/ Floor Cross Bar/ Lower Arm Bar (F&R)/ Sports Steering Wheel/TWM: A6 Leopard Gearknob/ Solid Base Bushings/ Work: 11R-FT 18X8.5/ RS Lock Nuts/ CP-e Tow Plate/ Yokohama AD08Delivery/ Install: HKS EVC6/ JBR: Oil Catch Can
Cobb don't love us, we have tried...
#failblog lol
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Bump back to the top, anymore takers?
We'll aim to wrap this one up in around two weeks time, so you still have some time to decide.
If it was that simple i would have done it, u have to change the dash cluster out. And trust me ur better keeping your ECU and not getting another. If the AP port was availble in Aus a lot would take them up on it, I WOULD HAVE... If you can talk them into it all would be in ur debt
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