408 on the dyno friday

[sprayedenali]

youre all stupid!!!!

is there a 4bar map sensor thatlll work on our trucks?

[George C]

i believe MSD has one. now for you and your tuner im sure he knows. once you max out your giving map sensor you can still boost higher then that last row. you just have to edit that last row with higher tables for fueling. this is same way that Jared tunes hsi truck with 1 bar map sensor and going 9.6

youre all stupid!!!!

is there a 4bar map sensor thatlll work on our trucks?

[pl4yboy]

Can you explain the differences and how it works? I understand that the OS on the GMT900 is 3bar capable from what I've read. I also hear the MAF is good to much higher levels than the GMT800 one. In your opinion, what would be the best way to tune a NNBS turbo truck? I know Greg is full on SD, but I've read about a lot of the Vette and Camaro guys using the MAF.

George, any opinion here?

[George C]

i havent done a boosted GMT900 truck yet however seems as ppl are keeping the maf in the camaro and vettes. Id say if the maf is allowing you the room to go XX amount of psi without being maxed by a hard data value then i would do it that way. Now not sure if EFI has a better setup then HP as were still using Beta. Ive heard that the new 2.3 is going to have a actual VE table so that will help for sure. If i was going to boost my crew cab which may happen for now ill run the maf.
Now i know flaco does a good bit of newer trucks but not sure if he is using GMT800 pcms or not

George, any opinion here?

[pl4yboy]

i havent done a boosted GMT900 truck yet however seems as ppl are keeping the maf in the camaro and vettes. Id say if the maf is allowing you the room to go XX amount of psi without being maxed by a hard data value then i would do it that way. Now not sure if EFI has a better setup then HP as were still using Beta. Ive heard that the new 2.3 is going to have a actual VE table so that will help for sure. If i was going to boost my crew cab which may happen for now ill run the maf.
Now i know flaco does a good bit of newer trucks but not sure if he is using GMT800 pcms or not

Give me a second, I have the hard values for the new MAF's somewhere.

[pl4yboy]

4000 g/sec & a 15000 Hz limit. Also the IFR table allows up to a 127 lb hr injector.

Also found this little gem. May try using it sometime...
http://www.hptuners.com/forum/showth...t=bluecat+tool

[flaco]

on the truck we did 1001 whp was a 2008 model, and used a cobalt 2.5 bar map sensor with the stock maff, due to using the 100mm lingenfelter having some surging issues, we did 80# injectors with a return style fuel system and i cut the tables in half commanding 46.5 injector size all the way accross due to boost pressure regulator, and cut the maff table in half aswell as the adders, crancking fuel, etc...this helped a ton when boosting high, we are at 23 psi and still have not maxxed the maff, we still have a couple of #,s left before i start to look into the adders to command more fuel...

but over all it drives perfect and the only issue we have had is blowing the maff to peices a couple of times " being blowthrough " where the sensor goes has come out sometimes under boost, so we got a new one and took it appart and J/B weld it together and so far it has held together

i have used the card type sensor but lateley this is what i have been doing on the higher HP trucks

works very well

Flaco

[pl4yboy]

on the truck we did 1001 whp was a 2008 model, and used a cobalt 2.5 bar map sensor with the stock maff, due to using the 100mm lingenfelter having some surging issues, we did 80# injectors with a return style fuel system and i cut the tables in half commanding 46.5 injector size all the way accross due to boost pressure regulator, and cut the maff table in half aswell as the adders, crancking fuel, etc...this helped a ton when boosting high, we are at 23 psi and still have not maxxed the maff, we still have a couple of #,s left before i start to look into the adders to command more fuel...

but over all it drives perfect and the only issue we have had is blowing the maff to peices a couple of times " being blowthrough " where the sensor goes has come out sometimes under boost, so we got a new one and took it appart and J/B weld it together and so far it has held together

i have used the card type sensor but lateley this is what i have been doing on the higher HP trucks

works very well

Flaco

The stock MAF on a 2008 is different than ours (George and I). We have the 2bolt Ford type. If I was to boost my truck, it would see 10 psi tops as a daily. Did you use the stock OS?

[George C]

something to think about. depending on the combo 10psi might be over 700 hp

The stock MAF on a 2008 is different than ours (George and I). We have the 2bolt Ford type. If I was to boost my truck, it would see 10 psi tops as a daily. Did you use the stock OS?

[flaco]

The stock MAF on a 2008 is different than ours (George and I). We have the 2bolt Ford type. If I was to boost my truck, it would see 10 psi tops as a daily. Did you use the stock OS?

it has the same frequenzy as the 08, 15000 hertz, but basicly can be done the same thing.....ive done a few times aswell, i have even rewired a 07 and 08 to accept a 2 bolt 09 style maff, on some trucks...

yes i used the stock OS, and running these on just the maf, extending it like that also give u more room before u enter REP mode on high boost,

it appears that on all trucks even OBS there is a limit on the PCM on grams per sec that can register before it does REP mode, which is 2.35, no more than that.....if u hit it it will shut the throttle no matter what.....we were bumping it at the 18 psi level before, by reducing the tables in half, the same 18 psi we were at 1.18-1.20..........soooo, thayt gave me way more room to go up on boost safeley, i also saw my maf table not get maxed out like before, so could go ahead and add fueling accordingly with the maff instead of adders