does anybody know the inner diameter of a 5.5 gen MAF tube? i know everybody talks about using the 82mm land rover MAF, but the price of boring my stock one VS the price of buying the land rover one and getting a vafc and tuning it is a huge difference. im thinking about boring about 2 mm out of the MAF tube, which would hopefully make a little difference with the AFR and the timing, although im not sure if i can bore it enough to make a difference. anybody with some numbers to help? thanks a lot. input on the idea is welcome too.

 

ID = 70mm. . . . . .There's not nearly enough meat on there to even make a 75mm safely.

M62 MAF can be had for quite cheap. (65 - 110 USD)

 

i was thinking about this same thing, but i cant spend 65 +150 (real cheap vafc2)+80 (real cheap for vafc tune). i was planning to make either a 72 or 73mm bore. think there would be any real difference? i dont car about airflow, thats not whats gonna change really, specially with a 72mm TB.

 

Only one way to find out.

 

haha, going to osh to pick up 73mm as we speak

 

Osh, 73mm??? Ok..

A 76.2mm housing has been proven for ~ 8whp untuned. FYI

Why not just do it right the first time, and get the proper items necessary to take full advantage of it?

 

because a 73mm drill bit (for a drill press) is only like 12 dollars, so i can use it both on the MAF tube and the Injen intake adapter that im using to connect to the filter. i plan to go 82mm later, but thats such a small amount of money to try something. im pretty sure i spent more doing the ssim

 

Why not just slap a filter on the MAF? 'Tis what I did.

 

you mean cut the flange off? by flange i mean the square part with all the bolt holes. if so, what did you use to cut that?

 

I forgot. My LR MAF doesn't have a flange. NM

See what I did there --->http://forums.maxima.org/showpost.ph...19&postcount=6

 

95blckmax actually did what i thought you were suggesting. might be worth a try, since i KNOW i have some 3" ID PVC lying around here somewhere. i guess well see what i end up doing and ill post up the results. thx for the input

 

3" PVC = for the 5th gen. I'm assuming you knew that. There's an entire thread on it from years ago.

 

yeah i know, sr20 did it first, but he kinda got in trouble for using the pvc. meh. blckmax did remind me though. i like the idea since the cost to me would be = the cost of a little jb weld

 

What's nice/convenient about the M62 MAF housing is that our sensor sits in there and feels at home. Although, electronic IPW adjustments via remote MAF V correction does need to be adjusted as so.

 

yeah. such is my plan for the future. but for now im only looking for a dirt cheap alternative that will last the summer racing season

 

This forum should cheap members

IBthat'showweinnovati.vehings

 

well i did this, dont have pictures yet since im on vacation now. its seems to be ok. got pretty good gas mileage driving here but i have no idea if thats an effect. ended up getting about a 74mm cut, which i calculated to a 11.76% increase in cross sectional area of the intake. i know i probably wont have gotten more than 5HP at most for this, but for the $12 it cost me, ill take it. better $/HP than most mods you can buy. im planning to get the LR intake later but this should do until i get a VAFC and headers...i will post pics in a week i guess. nothing special, hard to tell a 4mm difference in diameter. butt dyno says i dont see a difference...im not surprised

 

. It wont affect anything in closed loop.

 

just thought i would update with what i did. i ended up making about a 75mm cut through the tube since my drill press it seems doesnt rotate exactly right, haha, i guess this time its a plus. after that i sanded it nice and cut off the flange. made a bit of an air horn at the end (not really but kinda).
now for the pics.




and the resulting diameter


installed




EDIT: forgot to add, the gains are as expected: nothing i can feel. but i do have to say, it may have sounded better and may have had better part throttle response. placebo? could be

 

No data no care.

 

ill probly dyno sometime in the next while, but it doesnt matter cause i have never before

 

Will it be on a dynojet?

 

yeah of course, got to use the org standard

 

The reason I ask is because there a lot of members that do not use a DJ, and try and compare their runs to a DJ, from a different machine.

 

yeah i know this, i figure i wont see much, but hopefully i get a good idea of my AFR so i know im still safe