Brendan ASTI RX
Member
Hey folks .
I am looking for someone who knows what they are talking about.
To make a long story short I am looking at using the 4b11 Naturally aspirated motor in a mirage cup car as the 4g93 mivec motors just are not cutting it anymore and can not keep up to the k20 motors.
Now my questions are:
What kind of engine problems are you guys getting ? are your timing chains stretching/ tensioners failing.
Any head gasket / cylinder sleeve cracking or oil Pressure issues etc.
From what information I have gathered the 4b11t head flows just as good as a k20 at 280 cfm but the problem is that even the biggest evo camshaft available does not come close to the stock k20a camshaft.
My question on this is has anyone measured the max lift before coil bind or valve stem contact on the 4b11 head?
Also just to add that compression is not an issue and this engine does not need to have everyday drivability it will spend most its life above 5000 rpm.
Cheers Brendan
I am looking for someone who knows what they are talking about.
To make a long story short I am looking at using the 4b11 Naturally aspirated motor in a mirage cup car as the 4g93 mivec motors just are not cutting it anymore and can not keep up to the k20 motors.
Now my questions are:
What kind of engine problems are you guys getting ? are your timing chains stretching/ tensioners failing.
Any head gasket / cylinder sleeve cracking or oil Pressure issues etc.
From what information I have gathered the 4b11t head flows just as good as a k20 at 280 cfm but the problem is that even the biggest evo camshaft available does not come close to the stock k20a camshaft.
My question on this is has anyone measured the max lift before coil bind or valve stem contact on the 4b11 head?
Also just to add that compression is not an issue and this engine does not need to have everyday drivability it will spend most its life above 5000 rpm.
Cheers Brendan