lindsey boost enhancer
02-15-2002, 09:50 PM
#1
Burning Brakes
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lindsey boost enhancer
thanks for your thoughts on increase hp.
another ---------------------------------------
does anybody have any experience adding a LBE to a totally stock 951 ? is it a good bang for the buck ?
thoughts .......... <img src="graemlins/drink.gif" border="0" alt="[cherrsagai]" />
another ---------------------------------------
does anybody have any experience adding a LBE to a totally stock 951 ? is it a good bang for the buck ?
thoughts .......... <img src="graemlins/drink.gif" border="0" alt="[cherrsagai]" />
02-15-2002, 10:34 PM
#2
Nordschleife Master
yes, but no.
If you buy, you will end up selling it anyway when you upgrade. And you WILL upgrade soon afterward.
Save up for a dual port wastegate, and a camshaft.
If you buy, you will end up selling it anyway when you upgrade. And you WILL upgrade soon afterward.
Save up for a dual port wastegate, and a camshaft.
02-15-2002, 11:12 PM
#3
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My car's engine is stock but for chips. I think it makes a nice difference. I like it because my boost comes on sooner and more smoothly, which is nice in exiting corners. You may want a manual boost controller one day, but the LBE is a nice step that is relatively cheap and you could sell it for little loss later.
J
J
02-16-2002, 09:33 AM
#4
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My opinion is adding the chips made my forth gear feel like third gear and adding the LBE ($89.00) made fith gear feel like forth gear. Although it does not increase HP the feeling is just as if you had 30-50 more HP. I like knowing that my motor is still mostly stock (I can change it back in 1 hr.) and once you have a new head gasket installed I think you will be ok for 50k miles. After doing DE's for several years I found it more important to lower and stiffen the car. I also think that the looks of the car can be increased very much by installing the aero (air-o) mirrors that came out in 89 and putting on a glass Europeon rear bumper from a company called AIR. That's why there is chocolate and vanilla.
02-16-2002, 12:58 PM
#5
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I really thought the boost enhancer helped alot,I used it with a.p.e. stage 2 chips,you didn't mention if you had made this upgrade yet but you won't be disappointed. I just happen to have for sale a set of a.p.e.chips and a boost enhancer,with full instructions for $250 if you're interested...the chips are for an 86 or 7 951
02-17-2002, 12:16 PM
#6
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Don't forget to put back in your stock banjo bolt and take out the one supplied with the APE stage II chips. The LBE is set @ 10psi from LR. Unlock it and each full turn clockwise increase boost by 1 psi.
02-19-2002, 04:53 PM
#7
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You can make something that does the same thing as the LBE does for less. I read this on an online speed site. <a href="http://www.autospeed.com" target="_blank">www.autospeed.com</a>
Unfortunately you have to be a member to get all of this article, but its cheap. All the LBE does is delay the pressure signal that it picks up from the intercooler pipe to the cycling valve. The way it does it is by having this valve in the signal line that is adjustable. You can get fuel line or flexible silicon vacum hose. hook one end to the line coming off the intercooler pipe and the other to the cycling valve. Use a different length to delay the signal more. Just curl it into a loop so that it isn't strung all over the engine bay. I have the LBE on my car. I later read this article.
John
86 951
Unfortunately you have to be a member to get all of this article, but its cheap. All the LBE does is delay the pressure signal that it picks up from the intercooler pipe to the cycling valve. The way it does it is by having this valve in the signal line that is adjustable. You can get fuel line or flexible silicon vacum hose. hook one end to the line coming off the intercooler pipe and the other to the cycling valve. Use a different length to delay the signal more. Just curl it into a loop so that it isn't strung all over the engine bay. I have the LBE on my car. I later read this article.
John
86 951
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02-21-2002, 10:14 AM
#8
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What happens when you crank up the LBE. From what I understand the overboost protection in the car will shut the car down. Does it shut down the ignitiuon and fuel? When this happens can I just restart the car and it will run fine as long as I don't go full boost. I am wondering how much adjustment I can get before it shuts down.
John
John
02-21-2002, 10:40 AM
#9
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jason952 says:
You may want a manual boost controller one day, but the LBE is a nice step that is relatively cheap and you could sell it for little loss later.
john says:
I am wondering how much [boost] I can [add] before [the overboost protection] shuts [the car] down
All tuner's I've talked with say you must have chips to increase boost. One tuner says to scrap the cycling valve in favor of a manual boost controller, while another tuner says that you can make more power while keeping the cycling valve (i.e. overboost protection) in place.
Can someone enlighten me regarding how much boost you can run with the cycling valve in place? Once I install a manual boost controller, thus eliminating the CV, don't I lose overboost protection?
It just doesn't seem prudent to me to pull the CV out of the car.
Also, I've heard that the CV and KLR are set to moderate boost at mid-range speeds. The stock 944 Turbo (86) makes 0.75 bar at 3000/min and this falls to 0.55 bar by 5800/min. By installing a manual boost controller, does the boost only jump in the midrange, since the 0.55 bar is limited by the turbine (the 952 having a larger turbine which keeps boost pressure up at higher rpm, thus making more power)?
You may want a manual boost controller one day, but the LBE is a nice step that is relatively cheap and you could sell it for little loss later.
john says:
I am wondering how much [boost] I can [add] before [the overboost protection] shuts [the car] down
All tuner's I've talked with say you must have chips to increase boost. One tuner says to scrap the cycling valve in favor of a manual boost controller, while another tuner says that you can make more power while keeping the cycling valve (i.e. overboost protection) in place.
Can someone enlighten me regarding how much boost you can run with the cycling valve in place? Once I install a manual boost controller, thus eliminating the CV, don't I lose overboost protection?
It just doesn't seem prudent to me to pull the CV out of the car.
Also, I've heard that the CV and KLR are set to moderate boost at mid-range speeds. The stock 944 Turbo (86) makes 0.75 bar at 3000/min and this falls to 0.55 bar by 5800/min. By installing a manual boost controller, does the boost only jump in the midrange, since the 0.55 bar is limited by the turbine (the 952 having a larger turbine which keeps boost pressure up at higher rpm, thus making more power)?
02-21-2002, 11:16 AM
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No No No <img src="graemlins/c.gif" border="0" alt="[ouch]" /> <img src="graemlins/c.gif" border="0" alt="[ouch]" />
John is not saying
How much boost can I turn it up to before overboost protection takes over?
Because John knows that LBE does not increase boost, it only moves the point at which the turbo starts spinning up lower down on the rpm scale. It also allows the speed at which the turbo spins to accelerate even faster because it delays the signal to the cyclying valve to tell the wastegate to open.
My understanding is that when the system senses the turbo spinning faster and faster
That it will consider this a potential overboost situation and shut every thing down.
What happens after this?
John is not saying
How much boost can I turn it up to before overboost protection takes over?
Because John knows that LBE does not increase boost, it only moves the point at which the turbo starts spinning up lower down on the rpm scale. It also allows the speed at which the turbo spins to accelerate even faster because it delays the signal to the cyclying valve to tell the wastegate to open.
My understanding is that when the system senses the turbo spinning faster and faster
That it will consider this a potential overboost situation and shut every thing down.What happens after this?
02-21-2002, 11:29 AM
#11
Nordschleife Master
If you adjust the LBE, it can be used as a boost controller. The problem is that it's not good at it, if you adjust the LBE to say 15psi, when you lift off (after you're on boost) you'll get boost spikes...
How much boost can you run with the cycling valve in place, you ask? As much as you want.
The PO put in the autothority stage 2 deal, chips and jetted banjo bolt. I just got my boost gauge hooked up...15psi in 2nd, 17-18psi in 3rd, 20psi+ in 4th. Completely NOT safe. I have a stock headgasket that somehow has held up to those kinda boost levels for 6k miles.
I recommend an electronic boost controller such as the Greddy Profec B...which allows you to get X psi in every gear...while the manual and any other mod will give you more boost in higher gears.
How much boost can you run with the cycling valve in place, you ask? As much as you want.
The PO put in the autothority stage 2 deal, chips and jetted banjo bolt. I just got my boost gauge hooked up...15psi in 2nd, 17-18psi in 3rd, 20psi+ in 4th. Completely NOT safe. I have a stock headgasket that somehow has held up to those kinda boost levels for 6k miles.
I recommend an electronic boost controller such as the Greddy Profec B...which allows you to get X psi in every gear...while the manual and any other mod will give you more boost in higher gears.
02-21-2002, 04:35 PM
#14
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[quote] What happens after this? <hr></blockquote>
After exceeding approx. 13-14 psi on my stock 951 after I dialed up the LBE, the computer shut off the fuel mid-boost and then wouldn't allow the car to build more than about 4psi until I shut of the car and restarted it. It was fine after that.
To reiterate, I had the stock chips at the time.
After exceeding approx. 13-14 psi on my stock 951 after I dialed up the LBE, the computer shut off the fuel mid-boost and then wouldn't allow the car to build more than about 4psi until I shut of the car and restarted it. It was fine after that.
To reiterate, I had the stock chips at the time.
