Quickin

Why do companies keep making the 90mm MAF???

Why doesn't someone step it up to a 100mm MAF......then someone needs to make a 100mm intake and TB.

Isn't advances in mods the goal?

Cams, pistons, heads, exhaust, stroking, boring, nitrous, etc..... all this doesn't mean dick if you can't move the air

Another_User

I think the reason this has not been done is because MAF sensors are not very accurate at low airflow velocities. By increasing the diameter of the MAF beyond a certain point you reduce the velocity through the MAF and (I think) introduce turbulence at low speeds. This would cause innacurate readings.

Quickin

So does this mean that a 90mm MAF is the limit to what we will see?

How big is the MAF that a C5R race car uses on its engine?

Cody Brooks

iTrader: (2)

how about 2 small MAF's then. that should help keep turbulence down.make a special wiring harness with built in module that will take the reading from the 2 MAF and add then together and send them out so that it looks like what 1 MAF would read.

Lostpatrolman

iTrader: (3)

That has already been before on ls engines....

1CAMWNDR

iTrader: (21)

The C5R does not have a MAF. Besides, it is 427 cubic inches so it will flow more air at low engine speeds than a 346 inch motor therefore negating the low air velocity problem .

Quickin

I have a 436, bigger than the C5R. So what do they use and can it be done on my 436?

Another_User

I doubt it is the limit, but they will probably need to switch over to some other way of doing it. They have done the two MAF thing already.

Dragaholic

iTrader: (180)

I wasnt even aware that they make 90mm MAF, who makes them? Any better than 85mm MAFs?

DriveATransAm

vipers have 2 mafs, dont they.

Another_User

There was a thread on here about that the other day. It sounded like whoever made it went out of business.

CRAGER

I have the FAST 90 intake/tb and a 85mm Granatelli MAF on my 427. Gained 20rwhp, 515rwhp (40 degrees outside) to 535rwhp (around 85 degrees out), I know about correction factors and I know there was still a difference that day.

Plus the throttle response was insane, like I installed a higher gear.

What intake set-up do you have now?

Peace,
Craig.

CRAGER

Two throttle bodies, thats why.


Peace,
Craig.

soundengineer

iTrader: (16)

at the point of a 100mm Maf...its probably smarter to go with a MAFless tune...

Dragaholic

iTrader: (180)

Nothing right now, but I have the Fast 90mm intake and Nick Williams throttle body on my garage floor waiting for me to install it. Need to get a bellow and MAF to complete it. Not sure what MAF to go with or if I should go with a speed density tune. I'll have to give Mike @ G-Force a call and see if he has experience with it. If not, then I guess I'll just have to decide on what MAF to get.

Another_User

From my experience, that would depend on your cam. Lopey cams cause dopey dynamic airflow calculation at low rpms. It doesn't matter for the strip, but driving it around town can be a real PITA. But HPTuners sounds like it has some groovy stuff going on with a hybrid Alpha-N and speed density hybrid. If it works like they say, it could be particularly useful for tuning some wild combinations.

Quickin

If you're asking me, I have an LS6 intake and a Z06 85mm MAF.

ls1 joe

iTrader: (37)

Vipers do not have maf sensors. They are speed density closed loop programs.

Quickin

Well than how do I go with a dual throttle body for my engine?

Or is the 90mm plenty for my set up. If I can get more flow, meaning more power, from the dual type maybe I'll do it.

How much $$$?

CRAGER

You should get a 90mm intake and tb, either FAST or LS2. Should work really well with your displacement.


Peace,
Craig.