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Juiced10.5
10-14-2005, 03:49 PM
Anyone here running a backpressure sensor? If so, how do you have it hooked up to keep from burning up the sensor from the extreme heat?
Jim Monson
10-14-2005, 05:26 PM
I have burnt up 2 of them that were installed per RacePak instructions. I wish I had the data but the sensors get pricy!
Bobalos
10-14-2005, 05:46 PM
Jim where were they installed, right @ the head or down closer to the turbo?

is there a web site or page with pictures of your setup on it?

thanks
Bob
Juiced10.5
10-14-2005, 05:59 PM
Yeah, What he said. :-D
Bobalos
10-14-2005, 11:17 PM
I know it would be ugly, but couldent you run a tube off of the header & put the transducer 2 or 3 feet off of the header?

Bob
Jim Monson
10-15-2005, 01:32 AM
I know it would be ugly, but couldent you run a tube off of the header & put the transducer 2 or 3 feet off of the header?

Bob

The tap was in the y-pipe at the turbo inlet. I ran about 3 feet of stainless tubing, put a few bends in it, and put the sensor in a spot where it wouldn't see a lot of heat. All per RacePak instructions. Couldn't get one to live and I've heard of others having the same problem.
Bobalos
10-15-2005, 12:03 PM
DANG, thats a LOT of heat.

Bob
Juiced10.5
10-15-2005, 03:14 PM
Does anyone know if anybody has had success with one? I know one guy that says he has. He said he was using a 12" pc of 1/4" steel tubing with a loop bent into it but it was mounted in the crossover tube.
Bobalos
10-15-2005, 09:39 PM
I dont see any reason why it would not work in the cross over. its one complete system & the pressure should be pretty even all the way across it.

one of the guys on the Turbo Rustang site, did a bunch of testing on his setup with different mufflers & such to see how it affected boost & backpresure on the turbo. maybe do a search there & see if that comes up with anything.

Bob
Jim Monson
10-16-2005, 12:23 AM
I was thinking that if I ever put another sensor in I would make is as far away from the engine and the turbo as possible. Half way between both. Somewhere in the crossover tube. Then run a bunch of tubing with loops and bends. Then make sure the sensor gets aome air flow to cool it off. It is good data to have but melting sensors every 5 passes is killing my wallet.
Juiced10.5
10-16-2005, 07:56 PM
Jim, You wouldn't happen to have a pic of your setup would you?
Jim Monson
10-16-2005, 08:44 PM
Never got a pic of the sensor before I took the whole deal apart. Sorry.
Juiced10.5
10-16-2005, 09:07 PM
That's OK Jim. I think I found what I was looking for anyways. Thanks.
Jim Monson
10-17-2005, 10:17 AM
I might try and put one back in over the winter. We should all re-post here when we figure out what works.
Six_Shooter
10-19-2005, 11:53 PM
Ok, for you guys that have had this sensor, what did you use the data for after logging it?

Did you make changes to lower the pressure? Did your car perform better?
Jim Monson
10-20-2005, 11:11 AM
I just watched to see if the backpressure was too high. I've been told that if the backpressure gets much more that twice the boost pressure your turbo is less efficient. So if you have 20lb of boost and 40lb of backpressure you're ok. If you have 20lb of boost and 60lb of backpressure something is wrong. Changing the a/r ratio can raise/lower the backpressure.

On my car I have a 1:00 a/r ratio. I want to watch the backpressure to see if a 1:3 or 1:5 a/r would help.
Six_Shooter
10-20-2005, 11:43 AM
I just watched to see if the backpressure was too high. I've been told that if the backpressure gets much more that twice the boost pressure your turbo is less efficient. So if you have 20lb of boost and 40lb of backpressure you're ok. If you have 20lb of boost and 60lb of backpressure something is wrong. Changing the a/r ratio can raise/lower the backpressure.

On my car I have a 1:00 a/r ratio. I want to watch the backpressure to see if a 1:3 or 1:5 a/r would help.

I've heard the same about double the boost pressure.

But I guess what I was getting at, was is it needed to watch the exhaust back pressure every run? I would think that if you had it set up with one or two passes, then only when something drastic was changed in the set-up to use the sensor again, prolonging the life of the sensor.
Jim Monson
10-20-2005, 11:51 AM
I want all the data, all the time. I'm greedy. I need all the help I can get. I also wanted to monitor how well the exhaust was sealed. If the backpressure dropped off it's time too look for leakers.
Six_Shooter
10-20-2005, 11:53 AM
I want all the data, all the time. I'm greedy. I need all the help I can get. I also wanted to monitor how well the exhaust was sealed. If the backpressure dropped off it's time too look for leakers.

Good point, I hadn't thought about breakage. :lol: