Ok.. So I did some searching and didn't find anyone with any thread quite like this.

I run a Hallman mbc and was recently tuned at Ivey around 24psi in 3rd gear. The problem I have is load/gear affecting my peak boost.
So, in 3rd gear at WOT I hit 24psi, which will then taper down to redline.
In 5th and 6th gear, I hit 29psi, which tapers as well, but it's holding more than 25psi for a good chunk of time, and I'm definitely unsettled about it.

What are my options here? I was hoping to avoid running an ebc, or to really put more money in my setup, but something needs to be done. I do a lot of highway driving and like knowing that if I want to step on it in 6th gear, I can do so without worrying about knock or too much boost etc...

Should I go back to stock boost control and get tuned using that as my main source of boost control? Any advice would be appreciated.

 

29!!! You need to do something. Usually the hallman is pretty good.
Try turning it down so it spikes lower.

Call us if you need further help.

Sean

 

Yeah, my expession was the same. I lowered it, now, my spike in 5th/6th is 25, with a peak in 3rd of only 21. The lines are a bit long with where it's mounted now, so I'm going to shorten them up and relocate it closer to the rad now that the stock airbox isn't in the way.

You think I'll have better luck with something like the AEM Tru-Boost?

 

To be honest, the hallman is really really good as far as boost control goes. Hard to beat.
Try shortening the lines and making sure the inlet to the boost controller is pre intercooler.

How's the car running otherwise? Everything else ok?

Sean

 

Ok. I shortened both lines by about 1 foot by moving it from the back of the battery to the rad. Boost is a bit more controlled now, and since I got rid of the stock gauge set, and picked up a prosport electric boost gauge (i know, not the best brand) I can tune it much better.

Right now I have my 3rd gear spike at about 23psi (starting at WOT from 3000rpm), right after the initial spike, boost creeps up gradually to about 25psi, then tapers down to about 20at 7500.

I then put it in 5th and 6th gear and got to about 60-70mph which is my usual cruising speed, and at WOT it's at 25/26, then begins to taper soon after -- it's rare that I'll be sitting there on the gas for too long in top gear like that, because if I'm really looking to go somewhere I'll just drop to 4th.

So all in all, my problem isn't 100% alleviated, but it's definitely better. The car runs great, but I have to say, I'm curious what the boost was set at on the day we tuned and made those sick numbers, because I've turned the boost controller down quite a bit since then, and on the stock gauge, which reads to 1.5 bar, the needle was wayyyy past that mark when I left the shop.
Were you using that gauge to monitor boost?

Thanks for the great support.

 

Your boost had to be around 25-26. That would be somewhat over the 1.5 on the factory gauge. 1.5 x 14.5 is 21.xx PSI



Sean

 

Right, I'm just making sure I'm safe -- I don't have a tactrix cable and just want to be sure that as long as I continue to use good gas and keep things the same, I won't be in danger of too much knock etc..

Thanks again. Time for a clutch couldn't hold on a launch, and it's a stocker with only 10k on it!

 

Dude didnt you just get a new clutch in that thing? damn....

As far as the boost is concerned Im assuming your back home in NY but if you'r still in CT I have a tactrix cable and all the goodies to log boost. JDM MAP sensor and what not. Although I think the IX's came with the 3bar map? Or maybe that was just the JDM versions. Either way if it becomes and issue Id be down for helping out and temporarily throwing the 3bar map sensor in there and running some logs to get proper boost readings.

I'm most certainly not an expert on the issue but 29psi on a stock setup with pump? Thats borderline outrageous no?

Let me know man

Good Luck!

-Ethan

 

It was a quick spike, I didn't by any means hold it there. Except for maybe on the way home from jersey a few times after the tune

I've lowered it now and it's much more stable/controllable with the shorter lines, and a proper gauge to monitor. I'm back in NY now, but thanks for the offer. My buddy out here has a cable, so if I don't have the 3bar MAP sensor, I can at least log knock and make sure I'm good to go.

The clutch is fine, I shift hard, and drive the hell out of the car, it holds power just fine... It just can't handle a 6k launch with 10psi at the line haha

 

Cool man gald you've got that boost under control.

I guess i misunderstood about the clutch. So thats all good that its fine. I was just gonna say theres an issue if its slipping already.

Good luck with it either way man.

-Ethan