KMO43

Yea i may know whats going on

63 Nova SS

iTrader: (3)

Why are you going away from the 4.45? Did you like it?
What rpm are you leaving at?
What drag bags are you running? I heard you had to cut the spring perches to run them and I didn't want to cut on the car to do it. Sorry for the questions. I also have drag radials but they aren't as good as yours. Thinking about the 2 step, but I can't get traction all the time coming off the line as it is now with no boost. Thinking I maybe riding clutch too long.

Snail_SS

iTrader: (3)

if you want to put it that way

LNFwagonSS

445 was fun and it didn't blow up so that's good. Sooooooo many launches and low RPM 3rd gear pulls with that trans and it held and held and held together pull after pull and launch after launch but damn the gearing is just way too damn short for what I want to do with the car. Not to mention the rollout with 24.5 tires would make the gearing even shorter. And 445 tops out around 140 with normal rev limit and stock tire size.
The 245/45/17 Hoosier DRs fit no problem with the right wheel. I was using 17x8 wheel w 40 offset. I'm hhr tho but fitment should be identical as far as the spring perch, no modding/cutting needed. I'm leaving around 33-3500rpm on the wot box slipping the clutch. Tire pressure between 14-17psi before burnout. Hope this helps...

Getting off track here... Snail! That bitch is gorgeous! Why not mount her up now?

KMO43

Great info here!!

He's planning it out so he has a couple days to do the swap it's his first time swapping a turbo. Sat is the day

SR Tech

iTrader: (2)

Someone hit 400wheel on E so I can buy this turbo....again lol. Looks like he's made a lot of improvements over the orginal design so maybe selling my old one was a blessing in disguise

KMO43

I disagree mine was a gen1 and I still think mine was the most bad ass out of every setup I've seen so far

LNFwagonSS

Challenge accepted

KMO43

On pump and meth I flowed 39lbs/min VE @ 28psi

T-Man

iTrader: (3)

How much MAF skew is built into that? If you're skewing the MAF far enough, you've likely inflated that number quite a bit. That's 6758/Ethanol territory and I just don't see that happening with the R.

FWIW, my 400whp V-dyno run was 34.x VE flow with the factory MAF frequency table and very little MAF correction. Fueling is handled via the injector constant

KMO43

Very close to the same my meth screws with my MAF flow. It was years back now. I prob posted a log in here

T-Man

iTrader: (3)

Sorry, missed your question.

No, nothing just yet. I'm still fooling around with bringing it in the way I want without pushing too hard too soon. It's no different than the stocker; It likes to be brought online smooth and gradually to keep things from nose diving.

T-Man

iTrader: (3)

So you were likely sitting right where I am with the Gen 2, just pushing it harder to get there.

Ethanol FTW

cranemaster

On pump gas with stock intercooler and stock exhaust on a really hot day I did 360/370 on my cobalt with the 7163...

of course now I dont how stock inter cooler and exhaust ahhaha.. so il have new pump gas results this summer

looking for 410 wheel on husky 94

KMO43

You hit 39lbs/min VE?

I thought you were selling your car? If not I'd love to see your tune

T-Man

iTrader: (3)

Again, if you're skewing your MAF to achieve appropriate fueling and as you said "the meth screws with your MAF", you're not seeing 39lbs/min VE. The housing is not capable of that kind of flow. You know this.

KMO43

Here's a really old R log on pump.



I didn't wanna look too long to find it and since I upgraded to HPT 3.0 I lost half the info anyways but you can see how much meth I was running between the MAF and VE difference

KMO43

I do not change the injector constant when I do meth tunes because 90% of the time you are driving without meth but since I was spraying so much it was a big difference

T-Man

iTrader: (3)

Exactly what I'm saying. Your logs show what I'm talking about.

Also, are you running different cam profiles as well? That can further skew things.

Edit - Also, no malice behind my posts here. Don't want to come across as being a dick.

KMO43

Look at the diff in INJ ms between the 2 no meth 5.7ms with 4.5ms!! I have actually never looked at that side by side before but knew I was getting additional fuel so I hope I can run up to E70 this year if I so choose

KMO43

I could not tell you about the cam profiles these were years ago. I had the one in photobucket and the other I just grabbed. But I do change tunes a lot I do a lot of testing but they are both at diff RPMs

What are you talking about MAF doesn't do VE airflow

KMO43

I'm always game for a respectful discussion I didn't think you were being a dick

T-Man

iTrader: (3)

Of course, that should be left to those running ethanol. So if you're using the MAF frequency and MAF correction to adjust things, that's where the skew comes into play.

Are you running stock high load cam numbers? Doesn't look like it?

E70 is going to be tough without some serious help. MORE METH!

KMO43

Yes I 100% agree that's why my MAF is off because I pulled the fuel from the MAF for the meth. No I don't run stock cam profiles I actually just made some smooth 7500rpm profiles I can't wait to test!! I am going to run hopefully 800 to 1000cc\min meth but for the extra help I'll have fuel lobe and opels.

T-Man

iTrader: (3)

Our good buddy gmtech said it best -

"if you're going by MAF airflow, those numbers are practically meaningless. I can tune a car with a stock turbo that will show 65 lbs/min on MAF airflow. Does that mean it should be putting out around 650hp? No. MAF airflow is the actual sensor value AFTER it is run through the MAF calibration and compensation tables. VE airflow is basically the speed density/open loop calculations. Both of those can be skewed drastically"

Simply put, if you're altering fueling via MAF frequency (especially this one) and MAF correction, you are skewing (in a positive direction) the readings. This is why it cannot be compared car to car/ tune to tune. Every car/tune is different.