Thread: Another pull-through vs blow through

OK OK OK

So I got my DET swap in a car that was a wiring mess. It came with 2 MAF, and they were all the exact same from the DE or Avenir DET. This might have been the PO's fault, or they might in fact be the same setup (isn't the DE MAF good for like 250hp, and these are what, 205, 230hp factory?).

Also, about the timing above, I didn't know it at the time but I had a code 34 (Detonation Sensor), I have since fixed that, and even though I still think it will pull timing around there (since it seems like it's torque peak AKA most likely place to detonate), I think the MAF is getting maxed out in blow-thru.

So my question remains, is there an open element MAF that can be swapped out and not have to retune the ECU? Just for a quick test? (I'm highly considering Megasquirting the damn thing...)

Or he probably pays for everything himself, is my guess.

This thread makes wide sweeping generalizations, from "Johnny Wangwang is a bitch" to "blow-through sucks" and "everyone runs DE mafs".

I appreciate what Coheed is bringing up, as there really does seem to be an issue with DE mafs on blow-through setups due to the design of the MAF housing, but aside from that, blow-through setups are superior to draw-through setups.

1) Ability to drive the car if an intercooler pipe is disconnected
2) It seems that a great majority of the people who run BOV's on their draw-through setups seem to have more issues with stalling and running rich than their counterparts with blow-through setups

I tried running my car NA and it wouldn't go over 2500rpm on blow thru. This is purely in the tune I think. I blew off a coupler getting on the freeway once and I got stranded. Car wouldn't make it up the hill.

I will actually test the setup on my car when I start to change things around. I like the smoothness of the pull-thru. It really does seem like the car runs smoother on pull-thru to me. I have had two cars at once running both setups and the pull-thru had smoother power delivery, though slightly muddier throttle response.

Like I said at the beginning, take all this with a grain of salt. Do whatever setup you like and have fun. They both work on cobra/z32 mafs which is what most people run anyway. I would just get rid of the stock maf if you really want to go blow thru reliably.

Coheed which pipe did you blow?
Back when I used to blow the one right before the MAF, I had the same problem, and it was caused by turbulence of the turbo output. I just had to move that pipe off to the side where it wasn't hitting the MAF and was able to get home no prob.

On mine I blew the coupler right off the intercooler. There was zero boost getting through. I tried driving the car to the gas station after it blew cause I wasn't far from home, but the car would not run over 3K rpm. All the timing was pulled and the car would be so slow. It would not rev over 3500rpm at all.

Before my intercooler piping was even put on I got the same results when trying to drive the car NA. The tune is horrible for running NA. I will have to set the car up for pull-thru to see which one I like more. Blowing couplers off will not be considered for my decision because it never happens on my car. Even 24-26psi with non-reinforced couplers, they blow up like a balloon but never pop off.

I drove to cody's show with no pipe going from turbo to my maf with as I had no IC piping in yet and the car drove fine. it was just like NA. I don't know why you had so many problems.

Brent

Ya That's what I was thinking as well. The JWT tune pulls timing to 15* whether there is boost present or not.