Setting Turbo Boost with boost foolers

[ChrisCNC]

Thanks for the information guys, that helps.

I know I tend to ramble and get off subject! But I am still unclear if I must have a secondary guage to set the boost range. I'm pretty sure I do, but would like someone to clarify.

CJ45lc I see you have secondary guages, I've only got the information displayed from the Gryphon CTS/Evolution CTS which I assume ultimately comes from the MAP sensor. If the MAP sensor is being fooled then my assumption is I have to have a secondary guage to accurately set the boost range.

RT, I looked hard at the turboMaster. I called and talked to the people there and they told me straight up that it will not work with an ATS Ported Shroud Compressor housing without modifying it (the housing). The ATS guys swear up and down that the ears on the housing are the same as stock, and that the Banks WG actuator will work 100% guaranteed and the T.M. should as well. I told this to the T.M. people and they laughed and said, "... do you think we made that up?" but that they'd be willing to work with me to tell me how to modify it. I do have a nice CNC machine that is quite capable of making sweet modifications...no grinding here!

Great information Cody, I appreciate it. I kinda assumed that accurate boost numbers must not be required, or overly useful. If the MAP sensor were upgraded to give you a bigger voltage range over reliable boost numbers it probably wouldn't change the tunes a great deal...just be more work for you

It's easy to get caught up in the whole mod thing and think you need to change something because it's easy and/or everyone else does it. I know I do! I don't want to leave any performance, "on the table", if it's there for the taking, but don't want to try to squeeze blood out of a grape either.

Thanks again guys!

-Kevin

[rammertide07]

Originally Posted by ChrisCNC

I do have a nice CNC machine that is quite capable of making sweet modifications...no grinding here!

I'm jealous. I've tried talking my dad into buying a CNC machine. But he's got a guy in Georgia, south of Atlanta, that has all the high tech CNC machines and a 3D printer.

[cleatus12r]

There have been a couple folks who have looked into going with an actual 3 or 4 bar MAP sensor and then scaling the voltage-to-PSI functions in the PCM to accurately reflect actual boost above 25 PSI. However, that really would only come into play with stupid-huge injectors that need an accurate boost-to-fuel relationship for good driveability under low boost conditions and then accurately control mid-and high boost fueling as to not "choke out the fire". For stock-ish trucks that make less than 500 HP and have stock-ish turbo setups, the stock MAP sensor gets the job done.

[ChrisCNC]

If I had more time, I'd like to make some mods but right now I'm buried (with CNC work). I'm planning on going to the local junk-yard and getting an F250 outside door handle so I can get a pattern to make some solid aluminum ones and then have them chromed. Plus like you mentioned, it'd be easy to make a wastegate that runs solely off of drive pressure like the T.M.. Lots of things but gotta keep the customers happy first!

-K

[ChrisCNC]

Cody,

That makes sense, I would assume that trying to nail daily driving with big injectors (and underpowered fuel pressure) would be a headache for you.

That kinda brings up a question for me, for a stock-ish truck (like mine for instance) of all the turbo's you've dealt with, is there a turbo or turbo mod (compressor wheel) that stands out to you as having a well matched boost map? maybe a particular combination of turbos and wastegates?
Or maybe to put it another way, it there a turbo setup on a stockish truck that you enjoy dealing with because its map range "just fits" the needs of the engine? (i.e., you look like a hero! ) If you were going to swap out a turbo, what ones would you be looking at...wastegated or not wastegated? maybe that's an issue for a separate thread...

Didn't you get a project truck a while back? What are your plans with that? I'd like to get a good 7.3 block and build it up over time, but with my tastes ($$$) the first thing I'd want are billet rods and they're EXPENSIVE. I keep wanting to do stuff to my truck but don't want to go much over 400HP simply because of the PM Rod issue. Got a friend here that went about 475 with forged rods and he perforated his block. On the other hand, my brother-in-law is over 500 with his truck (estimate) and he's got PMR. I don't have the cash to gamble like that...

-Kevin

[ChrisCNC]

Ever deal with these guys? pretty good sounding MAP sensor, at least on paper...

5 BAR / 75PSIa MAP Stainless Sensor Kit (30-2130-75) [30-2130-75] - $163.35 : Muscle Motors - AEM Power Distributor!, Got Muscle?

[907DAVE]

Cody, can you verify that the Low Boost Fuel map acts as a limiter and not as a delay?

I have not been very successful when trying to control fueling with this map.

[cleatus12r]

I wrote up a HUGE story on that yesterday evening, Dave, but when I hit "post quick reply" a database error showed up and ruined my night.

I'll retype it at some point today for you.

Have any luck with those normalizers yet?

[cleatus12r]

Originally Posted by 907DAVE

Cody, can you verify that the Low Boost Fuel map acts as a limiter and not as a delay?

I have not been very successful when trying to control fueling with this map.

I'll get some datalogs when I go to town today. I decided that typing something out and hoping that it makes sense would be inferior to actually SHOWING what's going on there.

[ChrisCNC]

Got the boost fooler installed, the Overboost Annihilator is preset to 22-23 psi.

What are your reasons, Cody, for saying these are a good idea? I would think at the very least, it is protecting the MAP sensor from pressures greater than for which it was designed.

I was surprised at how small the sensor is, for curiosity sake, I'd be interested to know if this is a MEMs sensor, can't find any information about it one way or the other. Doesn't matter I guess.

Does anyone know about the difference between the MAP PID on the Gryphon versus the Turbo Boost PID? Are both of these coming from the MAP sensor? If so, then is one value inferred from the other?