The problem is when you start getting past 450whp a little bit less or a little bit more gas doesn't work that great. Haven't you noticed how most 1/4 mile times get slower as the boost is turned up with the exception of a few drivers on here? High boost is good fun on the freeway, but not great from a dead stop.

 

The map selector switch is usually used to select MAPs based on octane or for the security and valet maps not for boost control. If you are using a boost solenoid then the boost map can be setup for best traction. I am not sure if you can actually program seperate boost maps though.

 

Yes you can. Just like each map has a different fuel and ignition maps it also has it's own boost map.

 

Yes you can. Just like each "map" has different fuel and ignition maps it also has it's own boost map.

 

I see your point, but how manny different octanes do you have access to that you would actually use? I for example have access to 93 octane, so if I had the Utec I would have it tuned on 1 map for 93 and then another for race gas. That is two maps. What do I do with the other 3 maps then? I would use them for lower or higher boost settings on 93 octane. See the point? Other wise having 5 maps is useless. Are you actaully going to tune for 5 different octanes?

 

cant you just program the boost in one map? to keep it low till you get to late 3rd or 4rth gear and then let the monkeys loose?

 

NO...... I don't see the point!!! What is the issue that you have that you need higher and lower boost for a given octane????? For what purpose??? It makes no sense. I'll say it again... You want to control boost? Use the gas pedal !!

Respect
JET

 

JET: I think you are missing the point. You can not control your boost with your gas pedal. Meaning that you can not regulate your boost to only 8 pounds when your boost controller is set to open teh wastegates at 10psi. You can avoid hitting boost, but not necessarily regulate it.

Also, why wouldnt you want to have different boost levels. If you are on the street and want to go as possible the only limiting factor (assuming a built motor) would be traction. people like Shariff may not be able to "unleash" the full potential of their car on the street because they would just be spinning their tires instead of going as fast as possible. If I am not mistaken, shariff is running 15.4 psi at full boost. On the street I doubt he would want to run that (assuming he is stoplight racing and wants traction). 11-12 psi might be more reasonable. However, at the track with slicks, 15.4 psi all the way!

Different situations will require different boost levels. And I would hate to hold my pedal half way down so I didnt over boost and lose traction. A boost controller with different settings is just easier. Plus, lower boost (less air) means less fuel and therefore is better for daily driving (economy wise).

Does that kinda make sense?

 

+1...Well said. This is my point also, but putting my thoughts in writing is not my best quality.

 

Hey Jet... here's my reasons... You probably dont track or autocross and that could explain why you might not catch it right off the bat...

There are times you will want to be at lower boost for different courses... if your pushng 8lbs of boost... and you hit a spike going into an apex that just DOESNT need that much power... yet at the same time to get best traction you will wanna be on throttle... so you lower the boost down... allow you to enter the apex and increase speed slightly instead of a whooping 400+WHP trying to turn your front end into your rear end...

my 3.5lbs of boost is meant for daily driving and bad weather conditions... since this is my daily driver in the summer... (not winter though) there are days ill be driving in the rain... I dont feel like having to micromanage my throttle control to the slightest mm when its raining... so low boost! Easy enough...

5lbs for normal autocrossing courses... most of the time... more power = more problems out on the autocrossing tracks in michigan... minus a few...

and 8lbs for just ***** to the wall fun time driving

Thats why I do it!

 

Yea but you really cant control your boost like others have said here with just your gas pedal and plus when you are pushing 8 pounds or more your driving in the highway and you punch it your going to hit full boost and that equals to more stress on the engine. If you have it at low setting you can just use the low boost setting as a daily driver in the street and have some fun with it without putting stress on the engine and when your going to race hit the switch. Atleast thats what im planning on doing with it.

 

didnt get my car today... another delay, but ill get pics of where it is as soon as i can.

 

+1, that is exactly what I am going to do.

 

No biggie, I am sure it will be worth the wait, I am excited to see what it looks like where you have it mounted.

 

Sweet! This UTEC is so appealing.

 

Me personally i dont really care as to having different maps for different fuel octane becouse around me in miami i still havent heard higher than 93 and plus to do that for example you have to mesure exactly how many gallons of 93 to how many gallons of 101 octane unless your racing for money or going for a world record no point to it. Or i think.

 

Whatever.... still makes no sense.

Respect
JET

 

Hey Jet,

Not counting 87, 89, or 91 octane can you even get 5 different types of octane?

 

You seem a little touchy, but with that said, you have good advice. Someone else on here said something about timing and fuel at each boost level, if that were possible, couldn't I maximize power at each boost level or on the valet or 5 psi minimize the power? I am not trying to make anyone angry, I am just trying to go to the tuner with realistic ideas, I would rather look stupid on a forum than somewhere that could potentially rip me off.
Craig

 

Don't take it personally... I am a little touchy. Damn personality flaw. Is it that obvious? I should take it out on my wife instead of you guys. There is no reason to build different MAP's for different boost levels. You optimize each MAP for the octane you are using. If you use two octanes, let's say 93 for daily driving and 100 for the race track then you will have 2 MAP's. The UTEC should be utilized to control the boost via a boost control solenoid. So you just flip the MAP selector to the MAP appropriate for the octane you are using.

The reality here is that there is no reason to use race gas as yo uca nspin the tires all day long on a 93 octane MAP. Yeah... let's go put in $5 per gallon race gas so we can make even less traction. 425 rwhp or 500 bhp is the realistic limit to what you can utilize with an R compound 295 tire. The hp threshold arguably could be lower than that as the temp drops below 60 degrees.

425 rwhp can be easilly made on 93 pump gas. So why use 100 octane race gas. There is no reason.

All that said.... You only need 1 MAP which is all I have. I spin my tires through first and most of second gear @ 386 rwhp or 455 bhp. My car is a street car.

I drive my car 90% of the time off boost. I generally shift my car below 4000 rpm during daily driving. I'm hardly ever boosting over 3 psi. Max boost for me is 7psi.

So what is the need for a seperate MAP. There is no reason. You have a solution to a problem that doesn't exist.

Respect
JET