Not quite what I expected

Finally had the roller results today

Sun Rolling road results

156.5 BHP
Wheel 114BHP
Torque 184Nm

Spec is

ABF bottom end
Ported head
KR cams to get some miles on it first
4 branch with s/s exhaust
Lightened fly wheel
DTH jenveys with piper cross socks.

 

Hmm...seems weak on power.

Even with stock cams it should be making a fair bit more than that

Any printouts? What rev limit are you using?

Management?

 

Pretty poor he did say the air temp was high because the water temp was over reading.

 

Cams needed to take full advantage of bodies, bump in cr needed to take full advantage of cams.

 

How are the cams set?

See if Toyo chimes in - he might have a view on the torque curve position.

 

Cheers I got some neuman 288s to go in after I put a few miles on it. I'm running an ABF metal head gasget to increase the CR a tad

 

KR head?

 

ABF metal gasket will DEcrease the CR, as it's thicker, unless you've peeled a layer or two off.


Something's well off, with that spec. What management are you running, as already asked? What rating are your injectors? Did the rolling road measure AFR figures?

 

Metal Gasket 1.4mm compressed

Standard Gasket 1.0mm compressed

 

The middle of the gasget was taken out and the two metal layers were riveted back together. What would that bring it down to? Im not sure if the head had been skimmed

KR 027 head too.

Cheers

 

Something is fundementally wrong...

Cam timing?
Global ignition advance?
Fuelling?

Even on stock cams and stock compression I'd expect to see 170-175bhp with everything setup properly. VW singh has got that from megasquirt using plenum injection...


As has been said though, without a higher c.r, fruitier cams, good head job and more rpm, you will struggle to see any huge benefits in terms of power and torque from itb's..

Will just sound nice and give great throttle response

 

Why wait - why not build the final spec from scratch as you have the parts ?

Is it not all a bit mismatched ?

 

Cam timing is fine, Fuelling was checked no pinking anywhere on the rev range.

It seems to fire up and run better on 85 btdc instead of 78 degrees but people have told me both figures work.

The 288s are new so I to avoid having too many new things I want to make sure everything else works first before fitting and running in the new cams.

 

1.6 and 1.2 at the fire rings, on ones I've measured. I think the fire ring would be the critical bit. Maybe depends on brand though (those are Elring) but it's the same sort of difference.

@ Altern8 - it depends on the thickness of the bit you took out.

 

To get the most out of 288deg cams will require the compression ratio to be increased though.
Unless you are fitting hi comp pistons (beware on a 2.0 with a KR head as they can hit the edges of the chambers), you will not get the benefit of the longer duration cams. The head would need to be skimmed to the max to get close to raising the CR enough. The gasket mod will help to recoup some dynamic compression though.
All 16 valve heads have as near as darn it the same combustion chamber volume when new.
45cc + or - 1cc prior to skimming. IIRC

 

I think it was both bits just leaving the two metal outers

 

pipercross socks known to lose you 20bhp on a 200bhp engine, proven by SBD on the dyno.

bit them and get a proper filter

 

Thats first on my list to change, it seems to drive well but thats compared to the old 8v previously

 

What management are you using?

What's all this business with the different advance settings? If they are to do with the position of a CPS then it's very important to compare actual ignition advance (with a timing light) to the figures being seen by the management

 

I got a old DTA E48 ecu, When using the timing gun the timing matched what the ecu saw exactly using the real time logging option.