MAF sensor

[TexasT]

Steve, I don't know what's wrong with Dan Kellers car. Boost is at 29.7 with high gear 02's in the 750's. His car weighs 4,000 with him in it. Best he's done is 11.5 at 121 on a 1.7x launch. PTC spec'd race convertor, roller cam, Champion heads, 6262 and alky. He's currently fighting a high BLM problem.

Jason told me that high blm could be a leak in the intake or piping. 121 is good mph. im guessing he has stock gears, what size/height tire? might need something taller to "let it eat".

[Pyro6]

10's are tough to come by with a 1.70 launch.

[Steve Wood]

Steve, I don't know what's wrong with Dan Kellers car. Boost is at 29.7 with high gear 02's in the 750's. His car weighs 4,000 with him in it. Best he's done is 11.5 at 121 on a 1.7x launch. PTC spec'd race convertor, roller cam, Champion heads, 6262 and alky. He's currently fighting a high BLM problem.

Jason told me that high blm could be a leak in the intake or piping. 121 is good mph. im guessing he has stock gears, what size/height tire? might need something taller to "let it eat".

It can also be a leak on the exhaust side LOL

[Scoobum]

We lined up to race back in April at our local track. I let my foot out of it at the 1/8th and he was way back. Got back to the pits, and he had blown the PCV line off. I reinstalled it...but the BLM's stayed pegged at 142. I couldn't see any other lines blown off it...so who knows. I'm off the week of the 20th...hopeful ly I can stop in then and get a close look at it.

[motorhead]

This has been a very educational thread and I can confirm the results regarding a change in pipe size like I said previously my buddy went from 3" tubing to 4" and he ended with a couple extra psi on his first test run. He removed a 3.5" MAF and a Z06 card MAF in 4" housing and all 4" tube. It was kinda funny he said "man my car was pulling great with the 4" pipe" then looked at the boost gauge it was at 24 not 22 where he had set it for the old set up. I like my GEN2 translator and a simple way to learn how to tune lots of adjustability with the extender G chip. If I could start again I would probably go with the SD2 set up as you have even more adjustability. I probably would have been overwhelmed at first but it look pretty cool.

In the Procharger world a restrictive air filter can really slow a combo down.  I have a 3.5" pipe leading to a huge filter; because it can probably even contribute to belt slip if it is fighting air flow.

[Scoobum]

Mike brings up a good point. Anyone made back to back runs with the air filter on...then removed?

[Steve Wood]

In the old days, there was a lot of discussion on filters.  The consensus of guys like Conley, Yaklin, Chuck, etc was the bigger the better.  Remember the ATR kit with the big long filter in front of the radiator?

As discovered above, many don't understand that turbos are great at pushing air but they literally suck at sucking air and the longer the inlet pipe, the worse they get.  With regard to pipe, we have two choices...bigg er diameter or shorter length.

Now, we get to the filter...it's obvious that greater surface area presented, the less restriction we should have..the downfall to the ATR filter was the filter area was big but the pipe was really long...tended to offset one another.

The Nine inch K&N filter is a convenient size but bigger is better and a 12" filter with a rounded base and an inverted velocity cone on the end instead of a flat rubber end will flow a heck of a lot more air on a four inch pipe making it easier for the turbo to suck air in and get it moving quickly.

It's not without reason that many of the serious turbo race cars run the filter mounted directly to the turbo...I suspect it also serves to smooth the air entering the turbo and allows the the turbo to start spooling quicker and faster...

Again, one has to be pushing the limits to see the difference, I would guess.  I don't recall any numbers and I suspect most people that did this made it in conjunction with a total set up.

[Steve Wood]

I believe that the standard 9" K&N is good to about 900 cfm so a 6262 that is being used in it's sweet zone is probably being restricted by the filter to some degree.

Lotsa good articles online about filter sizing with turbos

[Just a Six?]

Again I can't copy & paste it screws it up everytime??


Rich just run a direct fused power wire to the ECM & you never lose the chip settings. I have a track Kill Switch & this way is cheap & easy to do.

Sadly, the axis is out of stock and full throttle is running a $10 off on the regular translator. I think this is a sign to just take the 5% off and go that route. I will just have to deal with reprograming when the battery is disconnected like the rest do. I did see the plugs are different. I guess the translator takes care of that.

Rich I forgot to respond before but I have a Kill Switch for the track so what I've done is run a separate fused power line direct to the ECM so it never loses memory. Easy, cheap & it works.

[TexasT]

So a regular translator seems to be the way to go. Not real worried about loosing the tune, just thought it might be cool to twist the dials. In all reality I just need to save the $30 and put in the order. I just a cheapskate, plain and simple.

I did order some hoses and a transition to install the 3" lt1 maf.

http://www.ebay.com/itm/231631060971?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

http://www.ebay.com/itm/231307078333?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

And pulled the trigger on a translator from full throttle. Goodness, $19.89 for shipping. I guess I can't pick it up any cheaper.

As above lots of good info in this thread . Keep it coming.
I'll do a air filter and open pipe comparison when the new maf goes in.

[motorhead]

Get 4-ply hoses.  3-ply suck.

[TexasT]

Ok

[Steve Wood]

As above lots of good info in this thread . Keep it coming.
I'll do a air filter and open pipe comparison when the new maf goes in.

Assuming you have a smaller turbo and a 9" filter, you won't be able to move enuf air to see a difference, I think.

Also, it may screw up the smooth air flow to the maf and it might run rougher....I guess that would depend upon what smoothing features or built into the maf.

[Scoobum]

Steve...what in the blue hell are 'smoothing' features?

[TexasT]

Those screens I think