2+2

Is there anything bad about using a Boost Enhancer or the like as a boost controller to increase boost...say to about 16psi?
Any thoughts or experience is appreciated. Thanks

Olli Snellman

I use LBE in such a way.Works great.

Olli
'88 951

Randy_J

I'm happy with my LBE - works as advertised. GURU Racing has the same thing for less - look for the "Boost Maximizer" at <a href="http://www.gururacing.net" target="_blank">www.gururacing.net</a> -let's patronize the people who help us out on Rennlist!

streckfu's

I like my LBE. I'd say it's worth the $100.

Daniel

<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />

nickhance

The only problem with increasing the boost to 16psi is that 16psi is a spike.. I'd rather add a few psi over the entire RPM range than just as a spike in the beginning.

It's fun either way, but more predictable if it's increased evenly.

C5Driver951

I've run a LBE for about two years, and while I like the performance (read faster spool), I don't like its inconsistency at holding boost. If you read the literature from Lindsay, the LBE is not designed as a boost controller. Therefore, I would say if you want a manual boost controller, buy one. If you want quicker spool up the LBE works great. It prevents the boost leak at 2-3 psi that you get with the factory wastegate.

Lately, I removed mine(bump me a class in autocross)and it sits in my toolbox. If you want it e-mail me...

AutoXdriver

Someone please correct me if I'm wrong but wouldn't using an LBE alone to increase boost be very dangerous because you don't have recalibrated chips and/or an adjustable FPR to prevent detonation? Aren't the stock chips only good for 14psi?

TKT2RDE

With stock chips, I suppose there is potential for problems like detonation if you exceed the stock 10psi setting of the LBE.

With aftermarket chips that account for such alterations, you could safely increase beyond the stock 10psi setting. Keep in mind that as mentioned on the Lindsey website, you need to give a 5psi cushion to allow for the time needed for blocked airflow to suddenly make its way to the wastegate diaphragm.

As mentioned earlier, increasing the setting too much will result in a spiking effect that can achieve greater boost, but come on suddenly and leave just a suddenly.

The LBE's design is not so much intended to allow you to control the maximum amount of boost, but too allow maximum boost to be achieved at an earlier RPM.



The inability of the LBE to "hold" boost is most likely has nothing to do with the LBE and can probably be attributed to the design of the stock wastegate.

I have a limited, but expanding, knowledge of all this stuff so take this information as such. But as far as I understand, this info is correct.

AutoXdriver

I may be getting boost pressure and wastegate control pressure (the pressure acting on the LBE, or on the wategate - I'm not sure) confused because I think they are different. However the main point being that stock boost pressure on a 951 (non S) is .8 bar which equates to 11.6 psi, not 15 psi. So if the LBE needs a 5 psi "cushion" then the LBE should be set to open at 7 psi. There was a recent thread where a guy stated he contacted Lindsey and they stated just that.


I don't know how to insert links for other posts, but it was entitled "LBE intalled, getting weird readings " and it was in the 924/931/944/951/968 Forum. Below is the relevant text:

[quote]
I was in the same boat as you. I've owned my 951 for about 5 months or so and was boosting to .70 bar (.70 above atmospheric) at WOT at approx 3500 rpm. I checked all vacuum connections, BOV, intercooler fittings etc. etc. I could find nothing wrong and assumed it was my wastegate.
Several months after driving the car stock I bought a lindsey boost enhancer and installed it with the stock setting of 10 psi. The difference was literally night and day. I was now boosting about 700 rpm sooner and max boost was now .8 bar on the stock guage, it seemed to hit very hard. After driving the car like this for about 10 miles I started worrying about detonation and overboosting. I emailed Lindsey Racing and was told to adjust out the enhancer 2-3 turns (7-8 psi) because I am running stock chips. I adjusted it out 2 turns and have left it as is. While not as exciting as it once was I no longer have to fear destroying my engine.

It would seem to me however that the LBE would come factory pre-set for those of us who aren't running chips rather than the other way around. Playing it safe could avoid a potential liability. I saw nothing of this on the site or in the instructions. Perhaps i'm being paranoid and the factory pre-set is really fine for a bone stock motor??
<hr></blockquote>

Peckster

I've go a question about the stock boost gauge. I've seen people saying normal atmospheric pressure is 1 bar, but my car usually runs well below that when I'm cruising. Does that mean I'm normally running a vacuum? I guess that would make sense as in n/a cars the air is being drawn in by the pistons,right? If I'm running 2 bar wfo with my lbe, what is that in psi?

SoloRacer

I replaced my LBE with a Greddy Profec B and really haven't felt a huge difference. The LBE worked quite well for what it cost. I'm selling mine (LBE that is) for $60US if anyone is interested.

toddk911

Peckster, 2 bar on the factory gauge is actually 1 bar abouve atmospheric, or 15 psi (actually 14.something)

I run Weltmeister stg 2 chips with LBE at about 15-16 psi with not det/knock problems. If you are worried, set your FQS (Fuel Quality Switch) to position 7 which ads about 6% more fuel to make you feeel safer about knock.

IceShark

John, 1 bar (~14.5 psi) is a little under 1 atmosphere (@14.7 psi). Many people think they are the same, but they aren't. And remember 1 ATM is the average pressure at sea level; your elevation will lower the pressure and weather will move pressure quite a bit.

If you are not on the turbo you will be running well below 1 bar as your intake is in vacuum condition.

SoloRacer

[quote]Originally posted by toddk911:
<strong>Peckster, 2 bar on the factory gauge is actually 1 bar abouve atmospheric, or 15 psi (actually 14.something)

I run Weltmeister stg 2 chips with LBE at about 15-16 psi with not det/knock problems. If you are worried, set your FQS (Fuel Quality Switch) to position 7 which ads about 6% more fuel to make you feeel safer about knock. </strong><hr></blockquote>

Where is this Fuel Quality Switch?

SoloRacer

Never mind. Got off my lazy *** and did a search of the forum. Sure enough found a thread that covered it. Is this the switch we who have Guru Racing chips set to determine what maps to run when we change injectors, etc?