LANDTANK performance MAF housing - Feedback request

[T Y L E R]

I'm intrigued by this product of Rick's and have read the initial writeup, and reports.

I'd like to gather any further updated performance reports here if I can. As a normally aspirated 80, I'm particularly interested in hearing from those 80's that are non-SC'd.

All feedback is welcome though .. be it technical or purely anecdotal reports.


Peace,


TY

PS: Please indicate whether your 80 is SC or NSC

 

[NLXTACY]

My 80 is au-naturale as well. This is in the middle of my priority list so curious as well.

 

[turbocruiser]

It works awesome with the turbo and we've posted tons and tons of data about all that. I do believe that both LT's and CattleDog's rigs are NA and they've posted data. What specifically are you asking about?

 

[reffug]

On a TC'd rig is a very impressive addition.

That and 4.88 gears and hp is right where it should be IMHO.

 

[Hants]

Feedback: Same as I've posted before. About 1MPG mileage increase, I don't have to floor-it-and-wait when merging onto the freeway, cruises easier, top airflow went from 17lbs to 19 lbs, a touch "throaty" off idle. Initial "lopey" idle disappeared after a week or so.

It isn't a rocket now, but much more "normal".

Details: Normally aspirated, shaved head, new O2 and other sensors, 7200ft.

 

[T Y L E R]

What specifically are you asking about?

I'm trying to cull the pure feedback from the other two threads (design-implementation, and vendor).

As folks purchase these subsequent to pouring through Ricks writeup, I was hoping they'd drop various feedback notes here so when a user does a search with certain tags they'll have this thread to go through as well as the other two. This one will provide a concise record of reports, without too deep a technical angle etc. Hopefully I'm not reinventing the wheel .. just trying to isolate feedback from anything else whatsoever.

Hoping for comparisons ..

Ex: "Was sluggish in merging before, and a week with the new part and it's much smoother"

I wonder also though how the age, and general condition of the 80 will affect the 'before' and 'after'. IOW's might a 200K 80 see more returns than a 120K 80?


TY

 

[NaterGator]

I'm still unclear if it fixed the off-idle pinging for people as well. Those threads got a bit scattered after a while with multiple subjects being discussed at the same time

 

[Lugboot]

I think it did clear up the idle and pinging issues on the NA rigs. But it'd be better for those guys to chime in, obviously.

 

[landtank]

the short test I conducted did not eliminate the pinging problem. But that owner got a MAF housing anyway as he felt the other improvements was worth it. Since it's only a summer time issue for him and he's been driving with the new MAF all year maybe this summer will be different.

The stumble at idle is resolved with the MAF.

 

[Cattledog]

No forced induction here, the unit has been on for the past 15000 miles and no problems. Gained hp and torque. I have no idle issues, it is as smooth as glass. Also gained better tip in throttle response. I have not seen an improvement in mpg, but I don't often run full throttle.

Cheap money for the improvements. Buy one.

 

[smug01]

I have one installed on a '97 NA LX450. It does feel more responsive and the transmission seems to shift more smoothly (say transitioning from a coast to medium throttle). As for power, it seems a little peppier.

I too have the dreaded pinging off-idle and really bad around 2400 RPM. The performance MAF did not seem to do much help, but I think my problem is with carbon in the cylinders...not any fault of the new part. I am likely going to replace the HG and decarbon the combustion chambers and will look at a true back-to-back (stock versus performance MAF) after the work.

 

[turbocruiser]

I too have the dreaded pinging off-idle and really bad around 2400 RPM. The performance MAF did not seem to do much help, but I think my problem is with carbon in the cylinders...not any fault of the new part. I am likely going to replace the HG and decarbon the combustion chambers and will look at a true back-to-back (stock versus performance MAF) after the work.

Agreed 100%. I did not have any pinging before and I don't have any after installing LT's MAF ... I also had absolutely no carbon of consequence in the combustion chambers (thanks to the BG 44K I use every 5 to 10K miles). IOW, I don't think that the MAF either causes or removes the problem and I agree 100% with smug that it is all related to the carbon yer carrying around.

All that stated, I know I posted a ton of data in doing this swap and also a ton of perceptions in doing this swap. It really improves throttle response, the perception of power and torque (I'm trying to be overly careful to use the word perception as I still have not dyno'ed the thing), shifting of the transmission, and mileage although I think I then immediately lost that gain in mileage with my roof rack so that is hard to have any long term data for. Everything about this mod is positive. IF and that is an incredibly large IF I had to say anything bad about this MAF, it really has nothing to do with anything wrong with the MAF ... in other words two things happened after installing it. First the limitation of the overdrive system was accentuated in the sense that slow mountain runs with overdrive on really had the transmission toggling between gears much more than before. Take the overdrive off, which you are supposed to do anyway when running mountain runs, and the tranny stays right where you want it AND because of the improved throttle response the rig is much more willing to accelerate and much more willing to "compression decelerate". Again I have to emphasize that this was only when overdrive was deliberately left on which yer really not supposed to do with that type terrain ... I'm just saying that was one thing 'observably worse' with the modded MAF and again it is not the modded MAF's fault it is the combination of our overdrive systems and my turbo that causes this to happen. The only other thing again observably worse was braking RIGHT after high boost acceleration and again that isn't the MAF that's the fact that my system has no blow off valve and when my throttle plate closes with 8 pounds right behind it, all that boost rebounds back against the intake that is now much more liberated / much less restricted by the improved MAF ... all that adds to a moment of overcoming that rebounded boost via the brake booster's needs. I have learned as a result that it is better to back off of wide open throttle somewhat slower than just flying yer foot off the skinny pedal and then slamming to the wider pedal! I like what that does for both the braking and for the handling of the vehicle anyway.

I hope all this answers the question? Again, this is indeed an amazing improvement in many areas. It is completely clear to me that the modded MAF provides much more "range" and "resolution" than the stocker. As many have argued, no one knows how far the factory ECM reads all that additional range and resolution but the results seem to speak for themselves. It is also clear to me that the modded MAF provides much freer flow and much more flow of air whether you are NA or FI.

 

[Corbet]

I just finished my install and will let you know my findings soon. For the record my rig is pretty much stock. I'm running it down to Durango this weekend. The last time on that trip I averaged 17.4 MPG over 3 fill ups.

Update 7/31/08: I still average the same but idle is smoother. Throttle response a little better.

 

[concretejungle]

Landtank, you should register a company name, like, masshole engineering. Make some stickers. "Masshole Equiped". that would be pimp.

 

[Battleship]

Sorry that I tried to start a new identical thread, I guess I missed this one.

I'm pretty happy with it. Driving is a little more pleasant with what seem like better power and a smoother engine. MPG is up about 10% based upon my numbers and the ScanGauge. I don't have a lot of data, but the pre-install miles are "favored" in that they included some highway time and the fact that I tried to get the tank as full as possible when I refilled after the new MAF was in.

My truck is NA, pretty much stock.

 

[chitown40]

the short test I conducted did not eliminate the pinging problem. But that owner got a MAF housing anyway as he felt the other improvements was worth it. Since it's only a summer time issue for him and he's been driving with the new MAF all year maybe this summer will be different.

The stumble at idle is resolved with the MAF.

I recall when you first posted up with your MAF you said that the vac line to the fuel pressure regulator had to be disconnected when using your new MAF housing/sensor. I noticed with my stock MAF that if I disconnect the vac line to the FPR that my idle smooths out. So my question is, is the improved idle a result of the vac line being disconnected or from the new MAF itself? Also, is it possible that the source of the lopey idle and occasional hiccup stems from the FPR?

 

[landtank]

I recall when you first posted up with your MAF you said that the vac line to the fuel pressure regulator had to be disconnected when using your new MAF housing/sensor. I noticed with my stock MAF that if I disconnect the vac line to the FPR that my idle smooths out. So my question is, is the improved idle a result of the vac line being disconnected or from the new MAF itself? Also, is it possible that the source of the lopey idle and occasional hiccup stems from the FPR?

Disconnecting the vac line from the FPR raises the PSI in the line at idle. The stock MAF sensor doesn't see the air flow at idle accurately and will cause the engine to run rich with the higher FPR PSI. So Toyota drops the pressure and then uses a switch on the TPS to further adj AFR at idle with a dedicated FT%.

The lower Fuel Pressure causes a poor inconsistent spray pattern resulting in the erratic idle.

The newer sensor I'm using accurately sees the air flow at idle. If we were to leave the vac line attached the engine would run lean at idle. So we need to remove that line and have a constant fuel pressure which improves the spray pattern and consistency from the injectors.

It's the better metering of the fuel in conjunction with the better breathing of the housing that combines to yield better fuel economy and performance.

 

[chitown40]

Thanks for the good explanation, Rick. Makes perfect sense.

 

[Abalonehunter]

As with BuckeyeFan, smoother engine response is easily recognized, for our truck we had a little hiccup upon acceleration and that is gone. By coincidence, or not, I was throwing a 402 code off and on prior to the install...it has not returned.

 

[landtank]

As with BuckeyeFan, smoother engine response is easily recognized, for our truck we had a little hiccup upon acceleration and that is gone. By coincidence, or not, I was throwing a 402 code off and on prior to the install...it has not returned.

good lord, if this cures EGR codes I'm going to be a millionaire!