borla pro xs. Quiet and does not take any power away. Well according to independent Dyno test I saw. That’s what I put on my car. No drone. Quiet at idle, doesn’t have that low, traveling rumble to it. Moderate volume when you get on it. It’s compact too. I got an oval one.

 

Good to know. That Borla is about 2.5x the price of the Dynomax I put in so I'm going to give the cutout a shot first since I have it and it'll give me better performance than any muffler.

 

Why not go speed density?

 

I would personally go speed density but that's just me . Ls7 Mafs work great, too !

 

I <3 MAF setups. To me they're easier to tune, quicker to tune, and are more forgiving to weather changes. Besides, I can't very well have a sticky about high HP MAF setups and then go speed density!

 

Dude, it's like 115 degrees down there year round, day or night. What are these weather changes you speak of.

 

hey now, we see 50's for like 1 WHOLE week.

 

so with tuning a maf is all of the fueling basically just the maf hz to grams table? i presume PE mode needs to be retained.
my new car was previously tuned as what i believe is maf only(high speed mode enter 300rpm) and all my experience is olsd with pe disabled.

 

Correct, you use the MAF transfer function to state the airflow at a given MAF frequency and use PE as your target that is RPM based. For what it's worth the factory tune ignores the MAP sensor above either 3k or 4k as uses the MAF solely to determine WOT airflow. What's the new ride, the C6Z? Gen 4 PCM's are a different animal.

 

yeah its a 06 z06 with a big inch ls7. my first foray into e38s. ive been poking around the tune but waiting on getting a wideband installed to make any real changes. it was dyno tuned by the PO about 60 miles before I bought it so its a monster at wot but off idle and drivability needs a little help. also got about 15mpg driving mostly highway it runs 80mph at about 1700rpm.
my old s10 ls2/3 I ran a credit card maf in and it did well, but that was an 0411 and about 5 years of strictly OLSD tuning ago. This one I'm planning to keep the maf since its NA, and I think it will be fun to try something new. when I first got it I was reading through the tune and the scaling really had me scratching my head before I realized what the heck was going on. Its going to take me a little while getting used to that.

 

Good stuff. I <3 6 speeds on the highway, so awesome putting along. I was getting 30 on the highway in my turbo 383. My sticky on the scaling would at least give you some general info that you could carry over to the GEN 4 stuff. Greg Banish also has a short video clip on doing it on a C6 that showed how well it worked.

 

I almost bought gregs stuff, but I am only interested in e38 specific info and I couldn't find anything definitive about how much of that content there is and where. I have been tuning long enough that I have enough background knowledge that I don't need to spend all that money to learn how injectors and map sensors work. I need more pointed info on what exactly the various e38 tables do, so ive just been reading a lot of forums.
I have been wanting to build a 383 sized motor for a while but this 468 popped up and I couldn't resist, the biggest problem seems to be finding a tire that can hold even some of the power but wont send me into the woods when it rains a little.
when are you going to graduate to some gen4 or 5 stuff?

 

Haha, I would have bought a C6Z had I not elected to play with this VR30DDTT platform as a new DD. I've played with Gen 4 motors just not Gen 4 PCMs lol. The Gen 3 stuff is just so easy and relatively cheap to play with. I do have a soft spot for C6Zs though.

Greg, @turbolx , can you shed some light on what you've got for videos on the Gen 4 PCM?

 

Well, pretty sure I set a record for the shortest full length exhaust with a full size muffler and an electric cutout it's not the black pipe in front that's wrapped with the bolts, that's the hot side. It's a pipe behind it same length.


It works awesome...in the garage at least. Nice and quiet closed and rowdy open. Quick idle clip.

LS7 maf in a 4 inch tube is ready to go.


Just need to install and swap fuel pumps and it's time for tuning again.

 

Did you steal that off of one of my cars?

 

I've got a sticky in the PCM/tuning section on how to make a high HP MAF setup. Been doing this for a long time. Still amazes me what LPE/others charge for an LS7 MAF setup when retail pricing for the parts is ~$100.

 

Your MAF stickies have made we want to try an LS7 MAF setup on something I'll actually be driving a lot myself.
I've only ever done the stock gen 3 truck MAF on a few low boost 4.8/5.3 setups. Anything beyond where they have maxed out I usually go SD.
There have been 2 setups I've helped with in the last couple of years that used an LS7 MAF but they weren't something that I got to drive enough to get any real feel for the LS7 MAF vs SD tune on a regular basis.

Tuning was certainly less of a hassle than an SD tune. I can usually get them hammered down enough go from tuning it in 90 degree weather to driving through the freezing winter with no issues.
With a MAF, I can usually get a good safe working tune hammered out in 15 or 20 minutes.

 

I am with you, and the screen insert (I use Saxon PC) makes tuning the card MAFs in a large tube so easy. People way over-spend based on vendor reputation and marketing.

 

Yeah, once you get the scaling sort (which has to be done on an SD tune too when you exceed the airflow limit), tuning the MAF is SO much quicker than a VE table.

Saxon FTW!!!!

 

Lingenfelter uses the early Colorado style maf so it isnt a card its more of a straw so it samples to itself not just a wafer in the wind so to speak.
Or at least they did. Its a pretty nice setup and has had better results from what Ive personally seen and done. I think the Colorado maf doesnt need iat table adjusted but i could be wrong.

But the spectre tube is nice and cheap as well. And now ebay and amazon are flooded with them.