[Der Abt]

Quote: Originally Posted by MINIMANIAUK (original)

"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

I've seen quite a few cars with this mod and not one of them gained 16hp.
This means you would be the first.
So my question is, do you have any dyno sheets of the car using this head ?

I agree with you about the standard head.

Quote: Originally Posted by MINIMANIAUK (original)

" 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??

It's obvious that you don't know as much as you think.

First of all, those cars had a similar setup like the Kelleners.

They had a modified carbon intake (BMC CDA) which added 5 real hp at the flywheel (dyno proven).
The gasoline cooling was good for another 8hp.
However, gasoline cooling (using airco lines) is an expensive modification.
For a picture of that mod, look at one of my posts above with the Kelleners setup, a picture is included where you can see this.
On top of that they had cams.
Cams without software are good for 4-5hp, but cams with custom software are good for 8-9hp at the flywheel (also dyno proven).
The sport cat. gave them 5hp, but when the software was adjusted again, the cat. was good for another 6hp at the flywheel.
The polished heads in combination with software was good for 6hp.
However, the polished heads didn't really add much, it was mostly the software that made that gain possible.
Total = 5 + 8 + 9 + 6 + 6 = 34hp
Their cars produced about 114 and 116hp stock at the flywheel.
Add to that 34hp and you know the result.
Their setups did cost a lot of money, but they got the hp they wanted.

But I'm sure you knew all that ...

Kind regards

Der Abt