Supercharger Problem - Help
07-31-04, 04:16 PM
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Supercharger Problem - Help
I have my m90 plumbed and running, but at 2800 rpm the engine stalls and then continues but with no power. It also will boost fine till that point. I also noticed that my max rpm is 6500 rpm, but it takes some doing to get there.
Any help would be gladly accepted.
Any help would be gladly accepted.
07-31-04, 06:13 PM
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I only have an Autometer guage but it is in the green the whole time. I am using AFCII with +10 at 3000 rpm. Also I might mention, the engine does this even if you are sitting still and not pushing the pedal very hard (slow increase in rpm)
07-31-04, 07:07 PM
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Well...i had to say it, but the obvious solution is to take the SC off and see if you have the same problems. Maybe you have it belted wrong and the SC is hitting the wall.
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07-31-04, 11:38 PM
#9
Do rotaries have knock sensors or some type of knock device? If you're overspinning that M90 it'll superheat the air, that may cause you to ping, and the computer to pull power? I was thinking the Mazda computer wasn't smart enough to do that, but perhaps I'm wrong?
08-01-04, 04:26 PM
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Finally figured out the problem, my lower intake hose was colapsing. I changed it out with a radiator elbow hose and problem is gone. Now I just need to find the boost leak. I am maxing out at 4 psi boost @ 3000 rpm. After that it just stays at 4 psi all the way to 7000 rpm.
08-01-04, 04:32 PM
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Very nice, you need to take pictures and post them! I want to see what it looks like!
Also, Tii and Verts have knock sensors that the ECU reads. I don't know if it pulls power or not, but i do know it's there.
Also, Tii and Verts have knock sensors that the ECU reads. I don't know if it pulls power or not, but i do know it's there.
08-01-04, 04:39 PM
#12
Originally Posted by miketreid
Finally figured out the problem, my lower intake hose was colapsing. I changed it out with a radiator elbow hose and problem is gone. Now I just need to find the boost leak. I am maxing out at 4 psi boost @ 3000 rpm. After that it just stays at 4 psi all the way to 7000 rpm.
08-01-04, 07:28 PM
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I am using the stock pulley that came on the supercharger - I think it is 3.125".
Also I just got back from towing the car - the old radiator blew the top off - I knew it was coming - So I am in search of a new one.
Will post pics soon
Also I just got back from towing the car - the old radiator blew the top off - I knew it was coming - So I am in search of a new one.
Will post pics soon
08-01-04, 07:31 PM
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Also I am only having to correct the fuel up about 7% and it is still half way into rich on the air/fuel guage. I have corrected the low side down 12% at 1000 rpm, man did that help my idle.
08-01-04, 10:39 PM
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Originally Posted by The Spyder
Im thinking its more of your pully size thats the issue-
08-01-04, 11:09 PM
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Originally Posted by miketreid
It should be but I will only be able to hear it once I get my exhaust to a normal sound level.
08-01-04, 11:22 PM
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how big is the intake into the turbo on a turbo II - That may be part of the problem with mine - I think I only have a 2" line going to the intake - maybe it is getting strangled after 3-4000 rpm
Could this be the boost ceiling?
Does anyone know the stock pulley size on a 1993 Thunderbird supercoupe?
I think I am spinning the supercharger alot slower than it is capable of.
Could this be the boost ceiling?
Does anyone know the stock pulley size on a 1993 Thunderbird supercoupe?
I think I am spinning the supercharger alot slower than it is capable of.
Last edited by miketreid; 08-01-04 at 11:36 PM.
08-02-04, 07:04 AM
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Originally Posted by miketreid
how big is the intake into the turbo on a turbo II - That may be part of the problem with mine - I think I only have a 2" line going to the intake - maybe it is getting strangled after 3-4000 rpm
Could this be the boost ceiling?
Does anyone know the stock pulley size on a 1993 Thunderbird supercoupe?
I think I am spinning the supercharger alot slower than it is capable of.
Could this be the boost ceiling?
Does anyone know the stock pulley size on a 1993 Thunderbird supercoupe?
I think I am spinning the supercharger alot slower than it is capable of.
A mate of mine is making 200rwkw with 2in intercoolering piping.
Do NOT tune your car with the narrow band AFR meter...
very silly
take it to a dyno.
08-02-04, 07:38 PM
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Would the car requiring more air at higher rpm be the cause of the leveling of the boost?
Also I calculated the max rpm of the supercharger at redline of engine (7,000 rpm) it is only 10,080 on the supercharger. I think it is time for a smaller supercharger pulley.
Also I calculated the max rpm of the supercharger at redline of engine (7,000 rpm) it is only 10,080 on the supercharger. I think it is time for a smaller supercharger pulley.
08-02-04, 07:49 PM
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