Vems How to improve boost quicker.

[KRIENG]

I ran E85 Rs2Turbo N75 Max Boost 300Kpa used Virtual Dyno Compare to 034
It's come late

DY5 is E85 Logfile with Any Trim Flex Fuel Sensor

Boost DC 90%

[caterpillar]

have you changed the exoust piping and have the cat removed??

[caterpillar]

always ive changed to bigger piping 3" or bigger, the boost comes earlier....600-1000rpm

[KRIENG]

I changed exhaust pipe too twin 2 1/2" and no cat but my downpipe didn't change.

[a4kquattro]

you might want to contact 034 and ask them what a/r hotside the dyno graph was done with, and if that matches what you have on your turbo.

[jade]

I ran E85 Rs2Turbo N75 Max Boost 300Kpa used Virtual Dyno Compare to 034
It's come late

DY5 is E85 Logfile with Any Trim Flex Fuel Sensor

Boost DC 90%

I have sat on a shelf a 034 rs2 chip-set, I found it very disappointing there would be far better chip sets to compare your VEMS too

[Billman]

Also check if they used the same gear as you. If they did the dyno in 5th and you did the run in 3rd it is possible to see later boost.

[popdemonic]

My GT2871 also does the something.i'm running with vems.i got 0.8 bar at 3000rpm and full
Boost after 3200-3300RPM but my valve guided is worn and caused the boost
Leaky through out the PCV system.that might be a culprit.i have wagner 'em and full
3" pipe on DP.

[DNA-S2]

My GT2871 also does the something.i'm running with vems.i got 0.8 bar at 3000rpm and full
Boost after 3200-3300RPM but my valve guided is worn and caused the boost
Leaky through out the PCV system.that might be a culprit.i have wagner 'em and full
3" pipe on DP.

What is your full boost?


DNA Autocare Ltd

[KRIENG]

Also check if they used the same gear as you. If they did the dyno in 5th and you did the run in 3rd it is possible to see later boost.

Like++

[fundahl]

Yeah they could of just loaded it up on the dyno in a higher gear.

[popdemonic]

What is your full boost?


DNA Autocare Ltd

1,8bar and taperred off after 5000rpm.

the turbo is GT2871 a/r .63 the graph said

it should be full boost by 2000RPM.i tried to

set the wastegate fully closed on the begining

it's still full boost at 3200RPM. i have mostly done

every upgraded parts on my car besides, the huge

boost leak on valve guides.

[a4kquattro]

boost leak on valve guides.

that actually means boost leak on the valve/valve seat. the guide shouldn't see any pressure from the combustion chamber with the cylinder @ TDC.

[fundahl]

that actually means boost leak on the valve/valve seat. the guide shouldn't see any pressure from the combustion chamber with the cylinder @ TDC.

Because the seated valves should hold the compression, not the guides, right?

I'm the one who just ordered the VEMS and SB Stage 4 clutch with 7a flywheel. Thanks for all the help!

[popdemonic]

that actually means boost leak on the valve/valve seat. the guide shouldn't see any pressure from the combustion chamber with the cylinder @ TDC.

thanks Marc! A leakdown test can indicate this symptom right?