thankyou again for the reply! its helping a lot.
with the head gasket, what one should i use? as i say the 0.5 cometic one is on it now, but its been on and off that head 3 times now, and i am a little worried about using it again.
one thing i have noticed also is you run 92 octane fuel, we have 95 and 99 available here, and i can use an octane booster if i wish also. But however, means my 160 bhp at yours would be like 150! Is the 531 unleaded too? i never thought about this before!
the bmw engine was 180 bhp and 160 lbs as i say, but the volvo motor now has more low down grunt, but the bmw was pulling harder over 4500. I think if i can get more out of the volvo and it did 180 bhp it would have more lbs than the bmw so it would be the better motor.
Oh also the engine its a b230A, so 3cc? dished pistons, its on a Lexus is200 6 speed box, ratios are really good, its on a 4.1 diff, with 195/65/15 tyres, it was on a 5.0 diff ratio with the bmw motor, but i reconded id be reving the volvo less so would work out about the same.
the rallies are a lot of stop starting and up to 60-70 mph, mainly from 30-50mph.
with the exhaust ports, is there a mod i can do that makes a big difference with out being hours of messing? As in, if im going to at best get 190 bhp out of it, can i get nearly there myself?
With the cast manifold also, is there a place to take metal from and not too?
how come some of the factory cams can make such big power? The K cam i hear is good.
My mates boat motor was 2mm from the 531, cast exhaust manifold, k cam, 2500cc, split 50s, 156 at the wheels.
what i also find interesting about the bmw engine, s the exhaust was tubular, not like tony law type standards obviously, but it was 38mm outside dia, and worked the 180 bhp of the bmw motor. red line was 7k.
edit, i dont know if this helps but the cam spec i have
Opening Duration 300 degrees
cam lift 12.9mm
Lobe center line angle 108 degrees
TDC lifting about 4.5mm.
Valve clearance 0.35 mm