As I know nothing about Nissans.........The car's a 200 SX S14 and owned by a friend of my son.
Fairly standard except for a recently fitted tubular manifold and de-cat system. Since then, it's lost low and mid range power. I've not driven it but this is the owner's observation.
They've had a guy look at it who said it has a Skyline ecu. Stuck a laptop on it and adjusted the fuelling. It's no better. They fitted a boost guage today and it hits 0.5 bar at about 3K revs and won't give any higher bosst except for 5th gear where it gets to 1.0 bar at about 5K revs.
There's also a manual boost controller fitted.
Any thoughts or suggestions? Is this about right? I thought that maybe the manifold to turbo pipe is too big?
TIA
S14 Boost pressure
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I believe that 10 PSI is standard on the S14, but as mattie said, up to about 15PSI is OK - more is ust asking for trouble.
The standard Nissan S14 ECU is a pretty dumb brick, only slightly smarter than my S13 obbie, so no - in stock form it can't be remapped.
To be honest, I wasn't aware of any Nissan ECU which could be remapped directly except possibly the R34?? Certainly all of the units I have ever looked at used much the same technology, but a variety of chips.
If the guy attached a laptop, the chances are he was reading the CONSULT port - which is the Nisssan Diagnostics port. I'm fairly sure that if it could be re-programmed that way, the 200 community would be aware of it. Since they use either a piggyback such as an Apexi etc or a new mapped chip such as the Horesham developments or Simon Norris chips - my money is that it can't be.
Given that it would appear to be overfueling massively, my money would be on a boost leak, cheak carefully they can be a pain to find.
Strangely one of the best Nissan tuners around these parts is Gary at APT
I've always found him most helpful.
Regards
Dwayne
The standard Nissan S14 ECU is a pretty dumb brick, only slightly smarter than my S13 obbie, so no - in stock form it can't be remapped.
To be honest, I wasn't aware of any Nissan ECU which could be remapped directly except possibly the R34?? Certainly all of the units I have ever looked at used much the same technology, but a variety of chips.
If the guy attached a laptop, the chances are he was reading the CONSULT port - which is the Nisssan Diagnostics port. I'm fairly sure that if it could be re-programmed that way, the 200 community would be aware of it. Since they use either a piggyback such as an Apexi etc or a new mapped chip such as the Horesham developments or Simon Norris chips - my money is that it can't be.
Given that it would appear to be overfueling massively, my money would be on a boost leak, cheak carefully they can be a pain to find.
Strangely one of the best Nissan tuners around these parts is Gary at APT
Regards
Dwayne
Of all the things I've lost......
I miss my mind the most.
If at first youu don't succeed .................... Skydiving is NOT for you!
I miss my mind the most.
If at first youu don't succeed .................... Skydiving is NOT for you!