Tuning advice needed on BC Stage 2 K20a for circuit car
Posted: Thu Mar 28, 2019 1:01 pm
Hello Guys,'
Ive recently replaced factory RSX-Type S motor with a replacement built motor, which I believe originated from KMod. Ive used a base map from the forums that maxed out the cam angles at 30deg, but ive been told I could go higher on this 35+??, As im a bit of a noob at this and also cautious as I dont want to bin another motor ( first suffered oil surge)
New engine: Approx 3 hrs run time, used as a Plan-B-Team engine in case of a failure in endurance racing
12.5:1 Compression on Wisco Piston W/ Skunk2 rods
BC Stage 2 All Motor cams, ferrea valves, springs
550 RDX injectors with PRB Intake manifold w K-tuned 70mm , all unnecessary ports blocked off. except idle control valve
Basic 4 to 1 headers to a modes 2.5 in exhaust.. ( no rear muffler)
Im running the V4 ECU from my RSX typeS and the loom and all sensors from previous motor.
I have a PLX wideband that is providing a the A/F on the digital channel 0 , which so far has been very impressive. Im running a 0-5v Oil pressure sensor on Analogue ch 7 for oil pressure monitoring
Car has now has a clockwork racing baffled sump and i have a 3 Qrts Accumsump plumbed in, set to 35psi . Oil cooler and koyorad radiator, the cooling system is actually too efficient , but build for endurance
5.1 final drive, standard gearing with OS Giken 1.1way LSD
I am noticing on the pulls today that there is a flat spot on acceleration and around 2.5K-4K rpm area, then it wakes up and goes. Again Im not super experienced with this so dont know where to start on modifying the tune I already have.. that was for a k24/k20 on stage 2 cams .
You can see on the data log the following times 4:20 ,5:05, 5:55, 7:05 , 8:03, this flatness or a little spike
I guess it needs more or less fuel in places. Im looking for a safe tune so the car can do 3-10 hr enduros , And I guess a bit more cam angle.
We have a great test street out the back of the workshop, so Ive done a few pulls and it seems to offer the same flat spot on several occasions
Car is in Dubai - so not a lot of tuners here, and they charge large sums for limited experience. so Im interested in a bit of crowd / expert advice
You can see the build on instagram @DXBHSV
Cheers
James
Having issues posting the log file due to size , will try trimming or can email to people
Ive recently replaced factory RSX-Type S motor with a replacement built motor, which I believe originated from KMod. Ive used a base map from the forums that maxed out the cam angles at 30deg, but ive been told I could go higher on this 35+??, As im a bit of a noob at this and also cautious as I dont want to bin another motor ( first suffered oil surge)
New engine: Approx 3 hrs run time, used as a Plan-B-Team engine in case of a failure in endurance racing
12.5:1 Compression on Wisco Piston W/ Skunk2 rods
BC Stage 2 All Motor cams, ferrea valves, springs
550 RDX injectors with PRB Intake manifold w K-tuned 70mm , all unnecessary ports blocked off. except idle control valve
Basic 4 to 1 headers to a modes 2.5 in exhaust.. ( no rear muffler)
Im running the V4 ECU from my RSX typeS and the loom and all sensors from previous motor.
I have a PLX wideband that is providing a the A/F on the digital channel 0 , which so far has been very impressive. Im running a 0-5v Oil pressure sensor on Analogue ch 7 for oil pressure monitoring
Car has now has a clockwork racing baffled sump and i have a 3 Qrts Accumsump plumbed in, set to 35psi . Oil cooler and koyorad radiator, the cooling system is actually too efficient , but build for endurance
5.1 final drive, standard gearing with OS Giken 1.1way LSD
I am noticing on the pulls today that there is a flat spot on acceleration and around 2.5K-4K rpm area, then it wakes up and goes. Again Im not super experienced with this so dont know where to start on modifying the tune I already have.. that was for a k24/k20 on stage 2 cams .
You can see on the data log the following times 4:20 ,5:05, 5:55, 7:05 , 8:03, this flatness or a little spike
I guess it needs more or less fuel in places. Im looking for a safe tune so the car can do 3-10 hr enduros , And I guess a bit more cam angle.
We have a great test street out the back of the workshop, so Ive done a few pulls and it seems to offer the same flat spot on several occasions
Car is in Dubai - so not a lot of tuners here, and they charge large sums for limited experience. so Im interested in a bit of crowd / expert advice
You can see the build on instagram @DXBHSV
Cheers
James
Having issues posting the log file due to size , will try trimming or can email to people