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Blowed Up!

Discussion pertaining to positive pressure E28s.
Boru
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Joined: Jul 04, 2008 10:09 AM

Post by Boru »

Greg, remember, not all detonation is audible... you may never have heard it.
Fred/Houston
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Joined: Feb 12, 2006 12:00 PM

Post by Fred/Houston »

Greg,
I'm sooo sorry about your motor. Try to look at it as a lesson learned and the next one will come out better.
Your car was awesome! I will eventually add the turbo on mine after having driven yours.
What car did you spank when this happened?
Call me when you get to Houston.
Cya
Fred
Jeremy
Beamter
Beamter
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Post by Jeremy »

Sweeney wrote:Greg, remember, not all detonation is audible... you may never have heard it.
Then what would be the surest way to catch it before catastrophic failure? EGT?
Ken H.
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Location: Suburban Gomorrah

Post by Ken H. »

Greg, it's a little bit late at the moment, but when you do the next FI project, you need this: http://www.jandssafeguard.com. Cheap insurance.
russc
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Location: SF Bay Area, CA
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Post by russc »

Right, knock sensor. All OBDII cars have knock sensors, NA or FI. Dinan installed knock sensors in all there cars, whether in house units or J&S sensors.

RussC
Jeremy wrote:
Sweeney wrote:Greg, remember, not all detonation is audible... you may never have heard it.
Then what would be the surest way to catch it before catastrophic failure? EGT?
GregATL
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Joined: Feb 12, 2006 12:00 PM
Location: Appomattox Va

Post by GregATL »

My 87' Thunderbird Tcoupe had a factory knock sensor so I am not unfamiliar with them. Yes I believe it is a worthwhile investment. When I do the Haltech (no knock sensing ??unfortunately) I will figure something out. It has a number of auxilliary inputs so maybe I can trick it into working with some kind of knock control. Lots of ideas here. Probably too many.
Boru
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Joined: Jul 04, 2008 10:09 AM

Post by Boru »

I used a SAAB APC system from a 900 Turbo to control knock. It's a stand alone system that is easy to adapt to any engine and it can be tuned. It reduces boost at the onset of knock.
GregATL
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Location: Appomattox Va

Post by GregATL »

Sweeney wrote:I used a SAAB APC system from a 900 Turbo to control knock. It's a stand alone system that is easy to adapt to any engine and it can be tuned. It reduces boost at the onset of knock.
Please elaborate. Sounds interesting.

I've already found how someone has used a GM knock controller with the Haltech to retard timing but haven't been able to dig up the details yet.

Also lots of people are datalogging detonation with Haltechs but can't do anything to control it. That's not good enough to me.

J&S and MSD both have nice units but they won't allow me to run full sequential timing on a 6 cylinder so I am disappointed as that is part of my plan. I don't want to run 2 units but that would be an option except I think it's not acceptable to spend that much money on this 1 item. I don't want a $ 20,000 M30. It defeats my original intentions and quite honestly is out of my financial means. The Haltech was FREE (well sort of, let's say barter) otherwise I'd have assembled a MS.

I want to do this on an acceptable but minimum budget and backdoor tricks (such as the SAAB APC system, thanks Sweeney) are the kind of things we need to share around here more.

Back on track. It looks like the motor situation is resolved. I should have the car running again around New Years. I think I'll find one of these SAAB systems and try to get it on the car for this event. What parts do I need and from what years and models SAAB can they be found?

Thanks.
Brad D.
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Post by Brad D. »

I had looked into for another car at one point. There are a few good links and people who have installed and/or tweaked the units for better performance.

APC

APC on a turbo Volvo
vance
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Location: Home of 5erFest 2009

Post by vance »

Maybe this will help Greg.

Sabb APC

Vance
bimmerboy
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Location: United States

Post by bimmerboy »

Any SAAB turbo before 91. After 91 it will only be the <1993 900turbos. After that they were incorporated into the ecu.
GregATL
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Location: Appomattox Va

Post by GregATL »

Going to the junkyard this weekend. Will see what I can turn up.
5verflyATL
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Joined: Mar 21, 2007 8:32 AM
Location: Atl, Georgia

Sorry to hear about your car

Post by 5verflyATL »

Hey Greg I just wanted to shoot you a line and say sorry about your car. If you where here in georgia I'd be down to come and give a hand if needed. Anyway you'll get back up soon and a b35 will make it worth it.
babisbabou
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Joined: Jul 15, 2006 6:43 AM
Location: Greece.athens

Post by babisbabou »

I am so sorry about cylinder 6 :cry:
The other ones look almost like new!!!

Have you figured out what the problem was? no fuel on the cylinder? I wish you well ;)


P.S. btw does my engine (M30B28) has a knock sensor or not?
turbodan
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Joined: Jan 09, 2007 10:19 PM

Post by turbodan »

BMW didnt install knock sensors until the M50 series motors. M30s and M20s have no sensors and obviously no electronics to support them.

Just keep an ear peeled, usually you can hear it pretty clearly. As soon as you do, get your foot out of it and you'll probab;y be alright.
Duke
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Location: Ormond Beach, FL

Post by Duke »

turbodan wrote:BMW didnt install knock sensors until the M50 series motors. M30s and M20s have no sensors and obviously no electronics to support them.
Not true - the 745 (M102/M106) had two knock sensors installed by BMW. That is another reason to go with a M106 block for the ultimate M30 turbo build. I has two bosses for knock sensors that protrude into the water jacket of the block.

Bellow is a picture of the TEC3 knock sensor I installed in the M106 block. It proved to be VERY sensitive. See my web page for more pictures.

Image
turbodan
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Post by turbodan »

Well thats not quite an M20 or an M30, is it?

Somebody on here used to have a part in thier signature about oddball euro cars that should never be over here in the first place, and how the above information does not apply to these grey market imported freaks. Thats what I'm saying.
Duke
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Post by Duke »

turbodan wrote:Well thats not quite an M20 or an M30, is it?
M106 has a M30 block with mods. Just as the S38 (B35/B36/B38) and M88 have the M30 block.

Finding a M106 block in the states is quite easy.
vance
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Post by vance »

turbodan wrote:Well thats not quite an M20 or an M30, is it?

Somebody on here used to have a part in thier signature about oddball euro cars that should never be over here in the first place, and how the above information does not apply to these grey market imported freaks. Thats what I'm saying.
:nuts:

Vance
Maddog
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Location: Atlanta, GA

Post by Maddog »

Sorry to hear about your motor man. I have been running 9 lbs of boost around Atlanta for 6 months without any issues. I have been very careful and very concious of my tune and my engine temperatures.

If you can get a good base tune that is consistant, you won't have to worry about knocking unless you have other issues. An injector misfiring should have shown up on a wideband as a rich spike.

What type of Haltech are you thinking about? E6X?
GregATL
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Location: Appomattox Va

Post by GregATL »

Maddog wrote:Sorry to hear about your motor man. I have been running 9 lbs of boost around Atlanta for 6 months without any issues. I have been very careful and very concious of my tune and my engine temperatures.

If you can get a good base tune that is consistant, you won't have to worry about knocking unless you have other issues. An injector misfiring should have shown up on a wideband as a rich spike.

What type of Haltech are you thinking about? E6X?
I was running 15lbs. It took at least 9 lbs to get the FMU working properly. Was pig rich prior to that at 7 lbs. I made a shim for the .5 bar spring and that got me a solid 9-10 lbs before I put the 1 bar spring in.

I have an E11V2. I am not installing it soon however as life has gotten in the way. I won't even be home to install my new motor (thanks TCD) until February. My goal is to use the auxillary outputs of the unit to keep the OBC functions accurate and working. No promises just part of the plan.
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