Problem not found, Turbo 1.8 with only 150whp :(
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Problem not found, Turbo 1.8 with only 150whp :(
Mx5 NB1 1.8L Turbo PSR 2860 gen2, OEM internals
ME221 ecu, AFR, boost solenoid, AEM Methanol for cooling, racing fuel pamp, 640cc injectors. oem coils.
OEM intake manifold but i remove the blades inside and port it. aftermarket throttle body slitly bigger from oem.
intercooler 55x23cm
kraken low mound manifold, 3" downpipe and exhaust, no cat, with meddle muffler.
Ported wastegate, forge actuator from 0.3bar
maximum boost at 1.1bar
Why the car only produse 150whp and 200torq on a mustang dyno? priviusly dyno with m45 supercharger was 185whp.
at high rpm the boost rising up to 1-1.1bar but no torq produse and no power.
I checked the timing, its correct
cylinder compresion is 142, 160, 140, 160
what other test can i do? Any suggestions?
ME221 ecu, AFR, boost solenoid, AEM Methanol for cooling, racing fuel pamp, 640cc injectors. oem coils.
OEM intake manifold but i remove the blades inside and port it. aftermarket throttle body slitly bigger from oem.
intercooler 55x23cm
kraken low mound manifold, 3" downpipe and exhaust, no cat, with meddle muffler.
Ported wastegate, forge actuator from 0.3bar
maximum boost at 1.1bar
Why the car only produse 150whp and 200torq on a mustang dyno? priviusly dyno with m45 supercharger was 185whp.
at high rpm the boost rising up to 1-1.1bar but no torq produse and no power.
I checked the timing, its correct
cylinder compresion is 142, 160, 140, 160
what other test can i do? Any suggestions?
Last edited by Miatahelix; Mar 16, 2025 at 12:44 PM.
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Your text is hard to see FYI.
Checking for boost leaks is a good idea. I don't think it's usually recommended to gut the intake (VICS I assume), but I don't think it would cause that big of a power loss.
The tune would be the next thing I'd look at. Did you tune it, or did you have a shop do it?
Checking for boost leaks is a good idea. I don't think it's usually recommended to gut the intake (VICS I assume), but I don't think it would cause that big of a power loss.
The tune would be the next thing I'd look at. Did you tune it, or did you have a shop do it?
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Things I'd check:
Assuming this exact motor made 180whp on the supercharger, and that was recent, I'd expect the motor is at least healthy enough to crack 200+ without breaking a sweat on a turbo setup. Something sounds wrong or off.
- Make sure spark isn't blowing out. Gap spark plugs down. OEM coils on a gen2 2860 sounds like a bad idea to me.
- Check logs to see if it's holding boost to redline.
- Check logs to see if commanded timing is expected (I.E. no timing retard kicking in from something else)
- Make sure timing is set to use map, and not locked.
- You said you checked timing, are you talking about the mechanical timing? If not, I'd check that. And of course make sure that the base timing is set and in sync with the ECU with a timing light.
Assuming this exact motor made 180whp on the supercharger, and that was recent, I'd expect the motor is at least healthy enough to crack 200+ without breaking a sweat on a turbo setup. Something sounds wrong or off.
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From: Edmonton, Canada
Mx5 NB1 1.8L Turbo PSR 2860 gen2, OEM internals
ME221 ecu, AFR, boost solenoid, AEM Methanol for cooling, racing fuel pamp, 640cc injectors. oem coils.
OEM intake manifold but i remove the blades inside and port it. aftermarket throttle body slitly bigger from oem.
intercooler 55x23cm
kraken low mound manifold, 3" downpipe and exhaust, no cat, with meddle muffler.
Ported wastegate, forge actuator from 0.3bar
maximum boost at 1.1bar
Why the car only produse 150whp and 200torq on a mustang dyno? priviusly dyno with m45 supercharger was 185whp.
at high rpm the boost rising up to 1-1.1bar but no torq produse and no power.
I checked the timing, its correct
cylinder compresion is 142, 160, 140, 160
what other test can i do? Any suggestions?
ME221 ecu, AFR, boost solenoid, AEM Methanol for cooling, racing fuel pamp, 640cc injectors. oem coils.
OEM intake manifold but i remove the blades inside and port it. aftermarket throttle body slitly bigger from oem.
intercooler 55x23cm
kraken low mound manifold, 3" downpipe and exhaust, no cat, with meddle muffler.
Ported wastegate, forge actuator from 0.3bar
maximum boost at 1.1bar
Why the car only produse 150whp and 200torq on a mustang dyno? priviusly dyno with m45 supercharger was 185whp.
at high rpm the boost rising up to 1-1.1bar but no torq produse and no power.
I checked the timing, its correct
cylinder compresion is 142, 160, 140, 160
what other test can i do? Any suggestions?
Can you do a leak down test? Perhaps you have a valve or head gasket problem.
The torque value is not that bad, but whp should be near the same, which does suggest a timing problem.
Can you use an air source to statically pressurize the intake? I found some boost leaks that were not obvious at idle that way, and you can't really check at full boost.
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From: Edmonton, Canada
^^^
Interesting video, such a problem has indeed that obvious consequence.
I was thinking since this engine was making more quite recently, with a blower, that can not be the problem.
But it occurs to me now that you must have to swap out the crank pulley and other things when you switch to a blower, and then back to the stock crank for the turbo.
So maybe the physical valve timing could have been shifted.
Worth a thorough check.
Interesting video, such a problem has indeed that obvious consequence.
I was thinking since this engine was making more quite recently, with a blower, that can not be the problem.
But it occurs to me now that you must have to swap out the crank pulley and other things when you switch to a blower, and then back to the stock crank for the turbo.
So maybe the physical valve timing could have been shifted.
Worth a thorough check.
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We run a leak down test and found out that 2 of the cylinders have high leakage up to 90% and 2 of them about 65%. So i am assume this is the problem of low hp output. Do i missing something? Forge my engine is the only way?
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Are you sure you were on the compression stroke at TDC when you did the test? If 2 cylinders are leaking 90% I would think the engine would barely be able to run. Did you locate where the air was leaking?
If you did that test properly and are actually seeing a minimum of 65% then I think it's safe to say your engine is done, but I'd double check that the test was done properly.
If you did that test properly and are actually seeing a minimum of 65% then I think it's safe to say your engine is done, but I'd double check that the test was done properly.
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TDC on the compression stroke though? Ironically enough, I also did a leakdown test yesterday. First time for me, and I thought it was just TDC, so I did cylinders 1&4 at the same time. Cylinder 1 was 5% and cylinder 4 was super high, probably something like 90%. Rotate the engine to get cylinder 4 back to TDC and suddenly it's at 5% as well.
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i have to run the test again then
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TDC on the compression stroke though? Ironically enough, I also did a leakdown test yesterday. First time for me, and I thought it was just TDC, so I did cylinders 1&4 at the same time. Cylinder 1 was 5% and cylinder 4 was super high, probably something like 90%. Rotate the engine to get cylinder 4 back to TDC and suddenly it's at 5% as well.
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