Anyone running Dry using Progressive?
I have seen the effects of having mismatched controller and noids, and it can cause some serious erratic firing issues.
Mine is hidden so the nossle comes up thru the filter and is aimed right at the MAF.
We will be trying some different stuff when my car goes back together. I love the DRY set ups so we are going to stick with it as long as we can.
Anyone hit it with a 400 dry shot yet?
I sprayed about 300 worth on my old 383. It was great.
Problem is after about 750 rwhp total you either need to do something with the MAF or start increasing fuel pressure to get the extra fuel.
I think Vince was around 830 rwhp or maybe a lil more total and he was using a KB BAP to spike the pressure on his 60 pph mototron injectors after the MAF was maxed out. Seemed to work well enough.
I have yet to push a z06 style. How much more do you think you could get using a Z06 MAF? Say if 750 was the limit on a stock ls1 type...what would the Z06 go to?
Robert
I sprayed about 300 worth on my old 383. It was great.
Problem is after about 750 rwhp total you either need to do something with the MAF or start increasing fuel pressure to get the extra fuel.
I think Vince was around 830 rwhp or maybe a lil more total and he was using a KB BAP to spike the pressure on his 60 pph mototron injectors after the MAF was maxed out. Seemed to work well enough.
Was your 750 with the stock fuel rails?
I'll be moving up to 60lbs this season and some billet rails hope its enough
Thanks. The Best V8 Stories One Small Block at Time
I explained it a little sloppy. I'll try to clarify, however, I am not a tuning expert, and maybe Jimmyblue will see this and add where needed.
Ok, the Z06 can flow more air through the maf and this is read as Airflow [g/sec] at any given MAF freq. MAF table goes to 12000 and fail freq is 13500 at which point you'll get a code thrown. So, the Z06 can flow more at this max freq. (12000). Here are the stock airflow g/sec:
439.2 stock F-body
443.6 stock Z06
453.6 6L Truck
458.9 My current Z06 setting
Using the 6L truck airflow chart was my starting point, and generaly works well for slight mods, then I went on and tailored to the current 458.9 g/sec at 12000 freq. what this does is allows adjustments to be made in fueling because now at 12000 instead of reading the stock 439 g/sec it now reads 458 and adds the additional fuel, as long as you have bigger injectors.
So, in conclusion the maf's may read upto the same freq, airflow is maxed out sooner on the ls1 compared to the Z06 maf. I will ask Jimmyblue to comment and make more clear what I am trying to say/point out. I have only tuned a couple cars and basically know what I am doing, but trying to explain is a little difficult as there is so much to this tuning stuff.
Robert
Dynamic Airflow lb min
Mass Airflow Hz
LTIT Gear
Idle Adapt (STIT)
And a couple more.
Then plug these into the RAF/MAF Spreedsheet for a baseline starting point.
Robert
Robert
Robert
the 98 pcm's dont read a high enough freq. to make it worth while
Robert
"The 97-2000 maf says that 11,250hz is 428.52 gms/sec of airflow. Well, the new 2001+ maf will say that 11,250hz is 359.16, which means that on a 97 or 98 year model car, your maximum measured airflow will drop by over 68gms/sec (from 428 to 359). This is why for '97 and '98 year models you should buy a recalibrated maf, or do not do this mod at all! 1999 and 2000 model cars will have the extended maf table up to 12,000hz and their ceiling will remain within the same threshold as it was stock."
11,250 is maximum for a 98 car
"The 97-2000 maf says that 11,250hz is 428.52 gms/sec of airflow. Well, the new 2001+ maf will say that 11,250hz is 359.16, which means that on a 97 or 98 year model car, your maximum measured airflow will drop by over 68gms/sec (from 428 to 359). This is why for '97 and '98 year models you should buy a recalibrated maf, or do not do this mod at all! 1999 and 2000 model cars will have the extended maf table up to 12,000hz and their ceiling will remain within the same threshold as it was stock."
11,250 is maximum for a 98 car
Robert

