Forums/Z31P/z31-performance-upgrade-forums engine-management/Blow through maf and other questions
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Coffeygr: (2018-02-22 04:16:04)
so as of right now i have a 85 vg30et engine ( rebuilt and bored 20 over) in my 87 na, car is daily driven when i get it running again [archived image: smile.png]
setup:
hx35w with pw39 external wastegate (relocation pipe)
2.5â intercooler piping
greddy rs bov
tomei fpr
450cc dsm injectors
nistune
currently running on 12psi
I heard itâs best to run a blow through set up especially with a bov, what do i need to do this ?
Is there anything else that needs to be done for the car to be able to start and run (minus tune) ?
do i even need to run blow through ?
Whats the best maf to use for blow though? Cobra , z32
sorry for all the questions just trying to get my car boosted
any advice would help
Looking for 300-350hp
mwolvinm: (2018-02-23 17:43:37)
I've been doing a lot of research on this myself. Here's a good tech article that will probably answer most of your questions:
http://www.lasotaracing.com/techdrawthroug.html
I'll defer to the more "learned" among us for maf selection, but for a blow through application, I'm personally leaning towards the ford '05 slot type MAF.
The main difference that you will see is the draw through MAF will have a bit of lag in the readings when you close the throttle, causing a temporary rich condition. Also, the draw through setup must have the BOV recirculated or you will get false readings when it's open.
Dunkine: (2018-02-24 21:36:45)
Covered on here back in 2012 too:
https://z31performance.com/forum/z31…aw-through-maf
Dunkine: (2018-02-25 17:05:11)
Could you run an aftermarket bypass valve instead of the BOV?
Augustus Maximus: (2018-03-11 05:45:16)
I run an HPX N2 MAF in blow through configuration, BOV on the hotside going into the IC. The MAF is housed in a 3" tube with air straightener. I run Nistune with feature pack installed. Zero issues. 1000cc injectors at 43.5psi
FlawleZ: (2018-04-03 16:09:31)
I run drawthru on a stock MAF. Making over 500RWHP and 500RWTQ for over 4 years now on a stock engine with NISTune. Car runs great but when shifting under WOT there is a small blip rich condition before you hammer down into the next gear. This attributed to the BOV like mentioned. Other than that I'm very happy with how it runs considering in using the stock MAF, stock Distributor, stock ign coil, and stock ECU with NIStune. Really can't ask for more all things considered.
FlawleZ: (2018-04-03 17:17:31)
I'm running a Precision Billet 6262. I use the E cover which is a 3" I let. The 4" inlet is useless on a drawthru. Having said that, your only looking for 300-350 I don't think you'll have any issue running that turbo.
FlawleZ: (2018-04-03 17:27:24)
It's just a 3" compressor Inlet like this