"By the way, a new head alone does NOT give 16hp.
I don't know where you got that number from, but it is incorrect."
We tried a number of combinations with heads,ported,different sizes of both intake and exhaust valves. skimmed to different CRs and with cams and w/o cams - in the end we got 27% more flow with a big valve head.
the standard head is poor at best and this shows in the fact that such a large increase in air flow is possible- resulted in 16 bhp increase on dyno and large torque increase
I guess we wasted our time as its not possible.
The resultant road testing showed that at the higher speeds the standard car starts to lose acceleration from 90 upwards and struggles to get to max compared with a bigvalve head with manifold which pulls hard right through
" By the way, a new head alone does NOT give 16hp.
I don't know where you got that number from, but it is incorrect.
Software + cold intake + cat-back exhaust + head = 128/132hp max."
"I've seen cars with the following mods:
software
cold intake
cams
gasoline cooling (using the airco lines)
cat.
header
cat-back exhaust
polished heads
They produced between 140 and 150hp (flywheel).
But not one of those mods gave more than 10hp.
And this list of parts does not come cheap."
IF the car produced 150 bhp at fly ;
AND software +intake =cat back+head =128
THEN ; cams ,header and gasoline cooling =22
BUT cams = 4-5 bhp
SO- how did the 150bhp occur?? give that nothing produces more than 10bhp?? |