Thread: blow through or draw through

I'm going to quote myself here.

Here are some measurements that I found when I went blow through.

http://www.sr20-forum.com/turbo/19838-decided-blowthrough.html

How well does a 00-01 DE maf hold up on blow through setup

not worth it will be maxed out in no time

Will it hold up 7 psi from a rwd garrett t25?

Look the the 00-01 DE mafs die often on their own without additional help. Your just asking for trouble using that maf on a turbo car. Do you really want to depend thousands of dollars worth of parts on a crappy maf that could cause you to go lean and kill your motor?

Just buy a proven maf, N60, N62, E60, VE/Pathfinder one. You have to run chipped ECU anyway, switching a maf in a tune is a piece of cake.



Actually they flow 325whp just like N60/E60/VE maf's do. They just don't last long at all, even cold air intakes shorten their lifespan.

please push a de maf to 325 and report back

bad maf actually makes the car run pig rich

Look, he's just going on what Miko has put in his MAF thread...

I would like to do one setup and keep it that way. If the 00-01 DE maf wont handle what i want to do on a blow through guess i will have to go draw through then with open bov.

Depends,

Yeah DE maf will not be able to go anywhere near 325whp safely. Youll basicly lose fuel tuning ability past 250whp because it will be maxed out.

You can get an n62maf for like 40-50 bucks now a days. 300zx or Infiniti J30, I bought 3 of them from a junkyard and paid 40 a piece for them with pigtails and sold them for 60 a piece.

As for blowthrough or draw through.

Ive always ran my turbo setups in blowthrough without issues. Ive used stock DE mafs in blowthrough up till the point they were maxed then switched to n62 maf. Ive done many many turbo setups on friends and customer cars and my own all blowthrough and not one issue. Run open bov all you want with no reprocussion. Pop a chargepipe off (as long as its not between the maf and throttle body) and you can still drive the car home. Overall better response going from drawthrough to blowthrough. As for a/f ratio differences, I really didnt see any. Maybe .1-.2 difference leaner on blowthrough. If your on a basic ecu upping the fuel pressure 1-2psi will take care of that. On a realtime, well just fine tune it. Simple as that.

Youll have your hatas of blowthrough (specificly BenFenner) that will come in and say that the proper way its supposed to be ran is drawthrough and bov recirculated. But pfff, In all my experience with it, blowthrough owns drawthrough in every way. Yes its not the way factory set it up but thats probably because they did it for longevity of the maf but soo far ive yet to kill a maf having it in blowthrough config.