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MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection Have a CDFP fuel pump question? Do you want to add Nitrous or Water Injection to your Mazdaspeed 3/6 ? Please come on in!


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 Old 01-02-2018, 08:49 PM   #1
 
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Default Do i need Upgrade HPFP

hello

today just log my car using foscan. here the result.
Logging using gear 3 WOT. from datalog my fuel pressure drop below 1600psi at rpm 2867~5128. but arise again above 1600psi on rpm 5220. do i need upgrade internal hpfp

My car info
Just remap & up boost to 1.3bar.
243hp to 267hp
torque : 41.63 to 46.83
Attached Files
File Type: pdf hpfp.pdf (44.7 KB, 56 views)
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 Old 01-02-2018, 09:39 PM   #2
 
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It didn't blow up?
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 Old 01-03-2018, 04:49 AM   #3
 
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Originally Posted by Fstrnyou View Post
It didn't blow up?
not yet
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 Old 01-03-2018, 06:06 AM   #4
 
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Originally Posted by paukacang View Post
not YET
Kinda answered your own question.
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 Old 01-03-2018, 07:46 AM   #5
 
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Quite a lot of boost at low RPMs - be careful.

Per your question - yes you have a fuel pressure issue (most likely HPFP). Get that fixed before you ZZB.
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 Old 01-03-2018, 08:02 AM   #6
 
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Originally Posted by shamie View Post
Quite a lot of boost at low RPMs - be careful.

Per your question - yes you have a fuel pressure issue (most likely HPFP). Get that fixed before you ZZB.
Tq for advice.
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 Old 01-03-2018, 08:18 AM   #7
 
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Not to thread jack, but my tire is flat. Do I need to fill it up?
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 Old 01-03-2018, 08:35 AM   #8
 
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Rule of thumb: if you're asking "Do I need HPFP?", you most likely do.
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 Old 01-03-2018, 08:43 AM   #9
 
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Originally Posted by WAMBUSHHHH! View Post
Rule of thumb: if you're asking "Do I need HPFP?", you most likely do.
Rule of thumb: if you're not stock and don't have HPFP upgrade, you already screwed up.
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 Old 01-03-2018, 09:34 AM   #10
 
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Short answer - Yes.

Longer answer - since the log shows rail fuel pressure below 1600 @ what you describe as WOT, you must upgrade the pump. And stay out of boost until you get that done. Log does not show throttle position, so I assume you were WOT when pressure dropped.

I'll bet that a complete log would also show injector bandwidth longer to try to compensate for low pressure. Lucky it didn't blow.
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 Old 01-03-2018, 09:50 AM   #11
 
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2018...

OP is the first fucking idiot of 2018...

Congratulations!
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 Old 01-03-2018, 10:11 AM   #12
 
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If I had a nickel for every “do I need fuel pump internals” threads started. I’m on board with @g00s3y; first fkn idiot of 2018! At least he provided some type of data log and not just a long list of mods he’s already added onto his car. Gotta give him props for that.
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 Old 01-03-2018, 10:32 AM   #13
 
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wow, I'm surprised you didn't blow up.
I think you have other fuel issues, not just the HPFP internals. I wouldn't drive the car at all.

and shamie, those boost numbers for some reason are absolute pressure, not gauge pressure.
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 Old 01-03-2018, 11:13 AM   #14
 
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Originally Posted by spada View Post
wow, I'm surprised you didn't blow up.
I think you have other fuel issues, not just the HPFP internals. I wouldn't drive the car at all.

and shamie, those boost numbers for some reason are absolute pressure, not gauge pressure.
How do you figure? He needs HPFP upgrade. Its as simple as that.
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 Old 01-03-2018, 11:27 AM   #15
 
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Originally Posted by Thor Hammer View Post
How do you figure? He needs HPFP upgrade. Its as simple as that.
I figured because his fuel pressure was 700 psi at 3500rpm. Seems like too drastic of a drop.
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 Old 01-04-2018, 01:24 AM   #16
 
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Originally Posted by JakeMS3 View Post
If I had a nickel for every “do I need fuel pump internals” threads started. I’m on board with @g00s3y; first fkn idiot of 2018! At least he provided some type of data log and not just a long list of mods he’s already added onto his car. Gotta give him props for that.
my mistake. sorry

Originally Posted by MSMS3 View Post
Short answer - Yes.

Longer answer - since the log shows rail fuel pressure below 1600 @ what you describe as WOT, you must upgrade the pump. And stay out of boost until you get that done. Log does not show throttle position, so I assume you were WOT when pressure dropped.

I'll bet that a complete log would also show injector bandwidth longer to try to compensate for low pressure. Lucky it didn't blow.
will log again full detail. tq

Last edited by paukacang; 01-04-2018 at 01:24 AM. Reason: MSF Database - Automerged Doublepost
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 Old 01-04-2018, 08:01 AM   #17
 
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Don't log again! Not until after upgrading the pump. We are trying to save your engine.

If those drops were at WOT, you are already in trouble.

If you have previous logs where injector bandwidth was logged under WOT, they would be worth looking at. Making a new log will only expose you to serious risk of zoom, zoom, boom.

What is it about "stay out of boost" you don't understand?
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 Old 01-04-2018, 09:29 AM   #18
 
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Originally Posted by paukacang View Post
not yet
You were damn close to blowing up, that if the engine is not hurt already.. Stop going WOT with that tune. At 37080 you actually hit 20PSI of boost and the next lines show the smallest fuel rail pressure reading, below 800PSI.
1.3BAR of boost is 19PSI, you should not go more than 17.5-18 and load of 1.9 without aftermarket HPFP internals. Yes a stock HPFP will allow for almost load 2 without loosing pressure but probably when new and clean, and not for long anyway.
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 Old 01-04-2018, 08:21 PM   #19
 
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Originally Posted by mituc View Post
You were damn close to blowing up, that if the engine is not hurt already.. Stop going WOT with that tune. At 37080 you actually hit 20PSI of boost and the next lines show the smallest fuel rail pressure reading, below 800PSI.
1.3BAR of boost is 19PSI, you should not go more than 17.5-18 and load of 1.9 without aftermarket HPFP internals. Yes a stock HPFP will allow for almost load 2 without loosing pressure but probably when new and clean, and not for long anyway.
that absolute magnifold pressure. logging using forscan dont have turbo boost PID. max boost is around 1.3~1.4 bar. now i drive like grandma. today waiting autotech hpfp arrive. will log after change it. tq for advice

Originally Posted by MSMS3 View Post
Don't log again! Not until after upgrading the pump. We are trying to save your engine.

If those drops were at WOT, you are already in trouble.

If you have previous logs where injector bandwidth was logged under WOT, they would be worth looking at. Making a new log will only expose you to serious risk of zoom, zoom, boom.

What is it about "stay out of boost" you don't understand?
tq for advice. now drive like grandma

Last edited by paukacang; 01-04-2018 at 08:21 PM. Reason: MSF Database - Automerged Doublepost
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 Old 01-04-2018, 11:50 PM   #20
 
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Originally Posted by paukacang View Post
that absolute magnifold pressure. logging using forscan dont have turbo boost PID. max boost is around 1.3~1.4 bar. now i drive like grandma. today waiting autotech hpfp arrive. will log after change it. tq for advice

Yes, that is MAP (manifold absolute pressure) in PSI.
If the MAP is 35PSI and barometric pressure is around 1BAR which is 14.6-14.8PSI depending on where you are... 35-14.7 =~ 20PSI.

Believe me, you were very lucky to have your motor survive at 20+PSI at <4000rpm and 750-800PSI FRP. I have not seen such crap occurring since 2011-ish when people became aware of the importance of the fuel pump internals. So you doing this in 2018... you were given a title in a few posts above and you well deserve it
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 Old 01-05-2018, 12:09 AM   #21
 
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Originally Posted by mituc View Post
Yes, that is MAP (manifold absolute pressure) in PSI.
If the MAP is 35PSI and barometric pressure is around 1BAR which is 14.6-14.8PSI depending on where you are... 35-14.7 =~ 20PSI.

Believe me, you were very lucky to have your motor survive at 20+PSI at <4000rpm and 750-800PSI FRP. I have not seen such crap occurring since 2011-ish when people became aware of the importance of the fuel pump internals. So you doing this in 2018... you were given a title in a few posts above and you well deserve it
huhuhu lucky man. thanx
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 Old 01-05-2018, 07:42 AM   #22
 
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Hey man in case nobody told you yet,

You need to upgrade your HPFP internals ASAP.
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 Old 01-07-2018, 09:15 PM   #23
 
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Originally Posted by KiwiFlavor View Post
Hey man in case nobody told you yet,

You need to upgrade your HPFP internals ASAP.
Just change to autotech hpfp & very impresive. tq guys for the advice. here i attach log after change it
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 Old 01-25-2018, 02:55 PM   #24
 
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Originally Posted by paukacang View Post
Just change to autotech hpfp & very impresive. tq guys for the advice. here i attach log after change it
Based on your log you're not getting over low 2k in RPM. What are you trying to log?
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 Old 01-25-2018, 05:21 PM   #25
 
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Originally Posted by motoman View Post
Based on your log you're not getting over low 2k in RPM. What are you trying to log?
Not sure what you're reading, but he went to 6198.
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