our v6 PCMs cut off at like 11,500Hz, looking for maf that would flow 80+ lb min at this hz..... know of any?

 

any one

custom maf

please its got to be cheaper then $4000 for a FAST lol

 

If I understand your question correctly, you want an MAF sensor that is capable of flowing 80 #/Min and puts out an 11,500Hz signal at this mass flow rate. (exact frequency shouldn't be an issue, you can change the calibration table in the PCM)

A quick calculation indicates to get to 80 #/Min (~600gps) with a 3.8L engine, you'd be running at 7,000rpm and 20# of boost. Is that truly what you are after? You might want to try the Forced Induction forum to see what the people with big boost strokers are using. The alternative would be to run the stock PCM in speed-density.

 

i'm running 60lb/min at ~4000 RPM right now with only 17 psi boost

stock PCM will not do speed density i'm use the PE mode to add fuel after the maf maxs.... its a HUGE pain (change with wheather i spen 2-3 track runs dialingin the tune again)

we are kinda stuck thats why i'm trying to find SOMTHING to get at least 512 g/sec out of at like 11,375 hz (since the PCM will max at that amount any way)

 

What's the displacement.... still 232ci? I can't come up with that much flow, even at 17psi boost (31.7psi absolute), and a 50degF inlet air temp.

The PCM tables for the LT1 only go up to 11,216Hz/471gps. But is that equal to the limit of the MAF sensor's output frequency? Does the frequency continue to build beyond the limits programmed into the PCM?

An LS7 MAF sensor would seem to need to handle a huge air flow, not 80 #/Min, but definitely more than the limits of the LT1 sensor, for example.

The LT1 PCM can be programmed in speed-density, in fact it defaults to S-D when you disconnect the MAF. Is the V6 PCM that much different?

I know I'm asking a lot of dumb questions.... but no one was helping you so I thought I'd take a pass at it.

 

well the stock MAF max at 37lb/min at 7-8 psi
my turbo: Master power T-70 .70/.68 p-trim flows max of 85lb/min at 17 psi its about 60lb/min


yes i have seen my stocker put out 14,000 HZ and 15,000 one time but it is not stable

i plan on turning up the boost more i want to ahve room to grow

v6 defualts to VE talbe if maf fails..... there is no SD for the V6 it is that much different taht why HPtuner will not do any more for us

its cool

 

Check out some Grand National boards and see what they're using. You might get more advice from the people there - they've been making serious HP from the 3.8 V6 for 20 years now.

 

Aren't the "VE tables" part of speed-density? Mass air flow = RPM/2 X displacement X VE X (460degR/IATdegR) X (MAPpsi/14.7psi)