Originally Posted by kitracer
Just like to share my experience on Pipe testing with the PR12.
After 1.5 litre, (I think the engine need 1 more litre to fully break in ). SKyline pipe and HEC second generation are identical in power from bottom to Top end. The HEC 1st gen had better top end but litte less on bottom.
I was using 17/61 & 23/56 ( 710) . This engine really like to rev and you can hear it at end of straight so I will switch to 16/61 & 22/56 this week end to test.
Fuel consumption is excellent. I can easily get 5min 30 per tank so after fully break in , I hope to get another 10 to 15 sec.
The lap record on this new layout on our track so far clocked 17.6. My best is 17.8. Can't do much on driving skill
but hope the engine will help me pull that gap closer next week.
Went out few hours of testing with PR12 today.
I changed to 16/61 & 22/56 (710) , tire dia 60mm, it is definitely better
30% odonnel, 0.4mm head shim.
Odonnel 97T plug
Temp 28C
humd 82%
Engine Temp 128
HEC 1st gen Pipe
After engine tunning done, I start setting up the car.
Then I realise I am keeping up with most 1/8 on straight and start lapping the same pace as the fast 1/8
my lap is down to 17.1s as traction was really good so this help.
Something should aviod to use on this engine is low gear ratio and big Carb. I have been trying from 6.5 , 6 and 5.4mm and best result is from 5.4.
Hopefully I can race at next week 4th rd Kyosho cup.
