some of you have been beating me up on why i havent run the car on more boost yet.. well this past weekend i did.. i mean i tried to, i really tried but it just was slower every time i turned it up... and when i turned it back down the car got faster.. WTF??
technology got the best of me.. this little turbosmart doo dad did me in. it has a feature called overboost and it was set at 15psi (just was scrolling through my settings on the way home from a movie tonight(the day after tomorrow.. good flick) and it hit me.
looking over my runs on DFI i could not figure out why on runs where i turned up the boost that it would momentarily peak over 15psi and then turn right around and bounce off 10psi and stay there..
the turbosmart, when it gets a pressure over the overboost limit you input, will immediately cut the boost in half.. at the time when half of the desired boost is reached it will then increment the boost back up to the set point.
because i have a 10psi spring, the 7.5psi (1/2 of 15psi) was never reached so it just rode the spring pressure for the rest of each run.

aint that sumthin! this explains why my mph was down on some of the passes (including my best) turns out 1st and some of second gear were over 15psi and then the second 1/8th mile was only 10-11psi.

so i think we all know what's goin down next time i race (lol probably NOT the 60'! )

just re read and thought of something.. in case someone decedes to put two and two togeter and claim this was the same problem i had with my last system.. its not.. i had completely removed the turbosmart from the vehicle attempting to fix that issue and was running a normal boost gauge and a regulator style controller..

 

One time my car would not start and I freaked out but then I realized that I had left it in gear. It happens.

 

Damn John i think thats worse.....
Kyle

 

John

 

thats good, you know the car has more in it now. 9's should be around the corner.

 

We sell a LOT of Turbosmart boost controllers and I feel it necessary to clear this up for everyone. The Overboost DOES NOT cut the boost in half when it goes over the set level (though it can). It REDUCES the boost below the set level and then tries to maintain it. This can be clearly seen from the videos I posted of my Turbosmart controller on the dyno. The Overboost was set at 1psi over the boost we wanted to run. Which is why you'll see the boost come up, drop down, then steady.

Curious how George was able to get 17lbs of boost to hold.

Also PSJ posted about my 60fts in the other thread. I have stock 3.42's, 28" tall slicks, stock TQ Arm, stock front shocks, Comp 50/50 rears, no front sway bar, and weighs over 3800lbs. My 60ft was a 1.47.

 

Lol Psj!!

 

hahahahaha

 

Stuff happens MM, at least you found the problem.

I can just picture PSJ sitting in the staging lanes at N vs S, hitting the key to pull in the water for the first time and the car wont crank. Then soon after seeing him running aroung looking for a laptop with WiFi so he can post here and ask why his car wont start

j/k john

 

whats this guy doin' in my post???

Rob perhaps you should read the instruction manual? http://www.turbosmart.com.au/pdf/FG-EBOOST-40-60.pdf

especially these two parts
"The OBS must be set to a SAFE level at least 2.2 psi above the highest boost pressure you want to produce" looks like you may have set yours up wrong.
"If the OBS is triggered the e-Boost begins to reduce the boost pressure to half of that set in the OBS parameter. Once this safe pressure is achieved the e-Boost returns to normal operation."

i reccomend you learn more about the products you sell to keep from mis-informing

also george did not have the turbosmart hooked up at ttech (not above mention of removing it), he was using a manual regulator

and you are welcome for the sales you got

 

I've not only read the instruction manual, I've probably installed and tuned more turbo LS1's with it than you'll ever see in person. It states that it "should be set to at least 2psi over the desired boost setting". I didn't say that my OBS was set where I wanted it in the video, just that it was set 1lb higher than the boost we wanted. This was due to the fact we were still finding the "desired" boost setting at that point.

But please show everyone where it says that it "cuts boost in half" in the manual.

And FWIW, you've never given me ANY sales.

I've got one sentence for you: 10.17....stock manifold, poorly designed log manifold with a measly T76 turbo, air/air intercooler, stock cam, unported heads, LS1 intake, stock PCM, near stock suspension.....10.17.

Oh yea...and that was on my first trip to the track. Imagine how fast I'd be by now with all of your track time!

BTW, I'm just a member here now...not a sponsor, not a vendor...just a competitive member. I believe the old rules may be null and void? I'm not bashing you, just making observations as to the validity of your excuses -ahem- I mean, claims. As any LS1Tech member may do.

 

Good info, I think Im going with this controller later this summer after my shortblock project is done. Of course Ive seen them $50 cheaper elsewhere on the net in case anyones shopping. :-)

 

Rob, Top of page 9.

I think this is good info for those that are using one of these. I'd like for both of you to keep the to a minimum though. This isn't the place for a soap opera to be created. Take that crap somewhere else like offtopic.com or ls1.com for all I care.

 

oh for the love of god will you two grow up already

 

I just find it funny that NOW all of the sudden it's a big deal if I make a response. But the continuous months of bashing on me were allowed to continue. Whatever. Believe what you want.

Did I mention 10.17?

 

notice i said TWO OF YOU Rob, I am not singling anyone out. don't play the victim.

People want PEACE in this forum, you two need to cut it out or take it to P.M's, whatever. PLEASE.

 

Guys come on, we do not need this arguing constantly... if it takes for you to just not respond in the thread do so by not reading it...

Lets keep more threads from being locked, and act like adults. If arguing needs to insue, take it to private messages...


Gray

 

Rob, I thought you guys were supposed to stay out of each others threads? Whether your are a sponsor or not is irrelevant. Maybe I am mistaken on what you guys worked out with the admins but that was my understanding.

 

Due to the previous months of bashings that endured here before, against and amongst many members involved, this behavior will no longer be tolerated. PERIOD. I don't care who was attacking who then and I certainly don't want it to start up now either.

 

So it cuts it in half? or it STARTS to reduce it by 1/2, then it stops cutting off boost once you get back to 'desired' boost...like a rev-limiter. Which is it?