changing maf and boring tb....
09-02-2005, 09:27 PM
#1
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changing maf and boring tb....
what would be the benefits of boring my tb out to a bigger size along with changing my MAF out to one from a car that flowed more fuel?
09-05-2005, 03:47 PM
#5
do it and tell us. Aaron92se bored out his TB and noticed some gains. check his website fir more info.
i have been toying with a spare maf. i didnt bore it persay but i definetly increased the flow. i used a DVOM to read the voltage. the modified one had less voltage output from the increased volume. I want to track test it, just havent done it.
i would do all of them and use the afc to fine tune the fuel.
i have been toying with a spare maf. i didnt bore it persay but i definetly increased the flow. i used a DVOM to read the voltage. the modified one had less voltage output from the increased volume. I want to track test it, just havent done it.
i would do all of them and use the afc to fine tune the fuel.
09-06-2005, 08:55 AM
#9
Boring the stock TB is pretty pointless. You would not be able to do it enough to matter if it would even matter at all.
Installing an 01-04 Pathfinder TB which is much bigger than stock might provide some gains for those with swapped engines or boosted. Bolts ons really wouldn't show any gains and there is no definitive proof of when there is a gain on boosted/swapped cars.
The stock MAF is not really restrictive. Not enough to worry about swapping for less restriction alone. Upgrading to a bigger or higher flowing MAF (300ZX is the same size but has a higher flow reading) is only needed once you start to max out the stock maf. Only boosted cars can do this.
Installing an 01-04 Pathfinder TB which is much bigger than stock might provide some gains for those with swapped engines or boosted. Bolts ons really wouldn't show any gains and there is no definitive proof of when there is a gain on boosted/swapped cars.
The stock MAF is not really restrictive. Not enough to worry about swapping for less restriction alone. Upgrading to a bigger or higher flowing MAF (300ZX is the same size but has a higher flow reading) is only needed once you start to max out the stock maf. Only boosted cars can do this.
.... That's because I didn't see it 
09-07-2005, 09:38 AM
#13
Well you are somewhat of an exception having that most hp of any NA Maxima by quite a bit IIRC. I remember noticing you have a bigger MAF piping but the 5.5 gen MAF is more easily upgradable being able to remove it from the stock piping. Since we can't do this and we don't have the all powerful VQ35 as modded by SR20DEN with your IM, I don't think it would be worth it, but someone can by all means replace the MAF with bigger piping and dyno to show some gains. I don't remember hearing anything about you upgraded your TB since with DBW it would be a PITA, but I guess you could have bored it out.
09-11-2005, 07:33 PM
#18
I noticed gains from just porting my throttle body and keeping the stock plate. In fact, I think it was Bryan H that did a dyno and noticed a gain of 13ft-lbs or so. I personally, didn't see those type of gains in the 1/4 mile, but I did notice a gain. I can't really say exactly how much, like I usually can, but I instantly noticed a gain in throttle response. I am guessing, just by porting your TB, you can shave .03 to .08 in the 1/4 mile.
With those numbers and experience in my mind, I decided to bore my TB as much as possible and open it up. My stock plate is 60mm and it was bored and the plate was swapped with a 63.5mm plate. I can't say I noticed any different by boring it over porting it. But, if you don't have the means to port your own TB, then just bore it. Just don't expect to feel much gains in power. You might feel better throttle response.
I have pics and info on my website:
http://www.littlebabywebs.com/maxima/TBSeat.html
A porting write up can be found here:
http://www.littlebabywebs.com/maxima/tbpage.htm
With those numbers and experience in my mind, I decided to bore my TB as much as possible and open it up. My stock plate is 60mm and it was bored and the plate was swapped with a 63.5mm plate. I can't say I noticed any different by boring it over porting it. But, if you don't have the means to port your own TB, then just bore it. Just don't expect to feel much gains in power. You might feel better throttle response.
I have pics and info on my website:
http://www.littlebabywebs.com/maxima/TBSeat.html
A porting write up can be found here:
http://www.littlebabywebs.com/maxima/tbpage.htm
09-12-2005, 06:35 PM
#22
Originally Posted by JSutter
well you said it fit so i must have misinterpreted. any how you said a max with anything over x amount of HP would benefit by haveing a larger MAF tube.
09-12-2005, 06:45 PM
#23
well at least i was trying to listen and learn 
. it hard though, when you give away a detail and no one pays attention. then sometimes you edit the post a few moments later. you probably even gave away the IM secret. but like you said most of the stuff you have done has either been done before or its just common sence. example: vq30 ecu with a vq35 flash. how come i didnt think of that, or any one else for that matter. it took a whole thread to figure that one, with you dropping hints every 5 seconds.
. it hard though, when you give away a detail and no one pays attention. then sometimes you edit the post a few moments later. you probably even gave away the IM secret. but like you said most of the stuff you have done has either been done before or its just common sence. example: vq30 ecu with a vq35 flash. how come i didnt think of that, or any one else for that matter. it took a whole thread to figure that one, with you dropping hints every 5 seconds.
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