Hahn Intake!
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New Member
Joined: 08-08-09
Posts: 15
Likes: 0
From: San Antonio, TX
Hahn Intake!
Read up on them and they supposibly have an impressive 29 horsepower gain. Really considering getting one for my 09' rally yellow SS. I have a tune already aswell. Any reasons I shouldn't get it? Or are you impressed with yours?
It runs the best of all the intake mods I have tried. Had the Dejon SRI, Air box mod, AEM CAI and now the Hahn CoolRam.
It did take quite a bit of MAF tuning to get the fuel trims correct though. No compressor surge or DFCO lurch with it now that it's dialed in. The AEM & Dejon were louder also.
Flowing 35 lb/min MAF while fuel trims = 0, 30 VE lb/min on my tune.
It did take quite a bit of MAF tuning to get the fuel trims correct though. No compressor surge or DFCO lurch with it now that it's dialed in. The AEM & Dejon were louder also.
Flowing 35 lb/min MAF while fuel trims = 0, 30 VE lb/min on my tune.
Last edited by Iam Broke; Oct 23, 2009 at 10:45 AM.
It runs the best of all the intake mods I have tried. Had the Dejon SRI, Air box mod, AEM CAI and now the Hahn CoolRam.
It did take quite a bit of MAF tuning to get the fuel trims correct though. No compressor surge or DFCO lurch with it now that it's dialed in. The AEM & Dejon were louder also.
Flowing 35 lb/min MAF, no fuel trim offset. 30 VE lb/min on my tune.
It did take quite a bit of MAF tuning to get the fuel trims correct though. No compressor surge or DFCO lurch with it now that it's dialed in. The AEM & Dejon were louder also.
Flowing 35 lb/min MAF, no fuel trim offset. 30 VE lb/min on my tune.
This intake flows better than stock and since the Mass Air Flow sensor (MAF) is located in a different diameter pipe than stock, the sensor sees a different reading for the same flow. As diameter increases in a tube, the flow slows down for the same volume passing through it.
The MAF curve needs to be recalibrated with HP tuners or such to reflect this difference to avoid skews in the readings. I spent 12 hours or so logging mine dialing it in but I'm pretty **** about it.
The ECU will compensate to a point and not throw a code unless it is somewhere around 12 - 14% off for a period of time. Hope that helps some.
The MAF curve needs to be recalibrated with HP tuners or such to reflect this difference to avoid skews in the readings. I spent 12 hours or so logging mine dialing it in but I'm pretty **** about it.
The ECU will compensate to a point and not throw a code unless it is somewhere around 12 - 14% off for a period of time. Hope that helps some.
The Hahn is the best of all the tests I've done, I'm quite pleased with it. They redesigned the breather connection so it locks on just like the stock connection.
Airbox mod with a K&N is a close second for me though, I'll agree.
Airbox mod with a K&N is a close second for me though, I'll agree.
Did they really? The one I had was just A metal tube
Senior Member
Joined: 10-30-07
Posts: 1,457
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From: Bakersfiled,CA
i like mine but i think it threw a cel...if u guys look at AEM's intake they actualy relocated to the MAF
its much lowere than stock and HAHN's
a represenative from AEM told me the reason was because the temp. and air flow change by the time the MAF reads it...so he told me,thats why they provide a pig tail(extension) for the MAF sensor
its much lowere than stock and HAHN's
a represenative from AEM told me the reason was because the temp. and air flow change by the time the MAF reads it...so he told me,thats why they provide a pig tail(extension) for the MAF sensor
Fuel trims were still skewed by the AEM, It's larger in diameter than the Hahn. Buy mine!
Yeah, now it has a threaded adapter that screws on the intake that is a flanged tube for the stock connection to lock onto. I heard about the earlier ones popping off. No issues here at all with it.
Yeah, now it has a threaded adapter that screws on the intake that is a flanged tube for the stock connection to lock onto. I heard about the earlier ones popping off. No issues here at all with it.
Last edited by Iam Broke; Oct 23, 2009 at 06:35 PM. Reason: Automerged Doublepost
Senior Member
Joined: 06-22-08
Posts: 840
Likes: 0
From: Florida
It runs the best of all the intake mods I have tried. Had the Dejon SRI, Air box mod, AEM CAI and now the Hahn CoolRam.
It did take quite a bit of MAF tuning to get the fuel trims correct though. No compressor surge or DFCO lurch with it now that it's dialed in. The AEM & Dejon were louder also.
Flowing 35 lb/min MAF while fuel trims = 0, 30 VE lb/min on my tune.
It did take quite a bit of MAF tuning to get the fuel trims correct though. No compressor surge or DFCO lurch with it now that it's dialed in. The AEM & Dejon were louder also.
Flowing 35 lb/min MAF while fuel trims = 0, 30 VE lb/min on my tune.
Senior Member
Joined: 07-25-08
Posts: 12,450
Likes: 6
From: Florida
This intake flows better than stock and since the Mass Air Flow sensor (MAF) is located in a different diameter pipe than stock, the sensor sees a different reading for the same flow. As diameter increases in a tube, the flow slows down for the same volume passing through it.
The MAF curve needs to be recalibrated with HP tuners or such to reflect this difference to avoid skews in the readings. I spent 12 hours or so logging mine dialing it in but I'm pretty **** about it.
The ECU will compensate to a point and not throw a code unless it is somewhere around 12 - 14% off for a period of time. Hope that helps some.
The MAF curve needs to be recalibrated with HP tuners or such to reflect this difference to avoid skews in the readings. I spent 12 hours or so logging mine dialing it in but I'm pretty **** about it.
The ECU will compensate to a point and not throw a code unless it is somewhere around 12 - 14% off for a period of time. Hope that helps some.
Senior Member
Joined: 07-25-08
Posts: 12,450
Likes: 6
From: Florida