Ek9 engine under power


nwr161282

nwr161282

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Jun 26, 2011
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Ok so I've had my rally car on the rolling road and surprised with my results. I have a civic Jordan which I've fitted with an ek9 engine. It has a aluminium flywheel, induction kit, 4-1 manifold, 2-1/2 straight through exhaust and Hondata. On the rolling road the most we could get out of it was 150bhp at fly and 125 at wheels. My tuner was at a loss as to why it was so low as the map was about as far as he would take it.

Does anyone have any ideas why the power is low?
 
You checked compression?
Sounds like a compression issue to me. How does it drive on the road?
Dyno was operated properly?
 
type of dyno? location, air temp? what ecu? could be a spark or fueling problem, is the car hesitant or bogging down?
 
I haven't checked the compression I'll try that this weekend. Can feels ok pulls well enough but it just doesn't feel as good as my standard Jordan road car. Yes synonym operated correctly. It was a guy called Ricky Gauld who has been tuning cars for years.

I'll update dyno info once I'm home from work.
 
I haven't checked the compression I'll try that this weekend. Can feels ok pulls well enough but it just doesn't feel as good as my standard Jordan road car. Yes synonym operated correctly. It was a guy called Ricky Gauld who has been tuning cars for years.

I'll update dyno info once I'm home from work.
 
Ok so the rolling road is in north East Scotland. Temp was 13 degrees atmospheric was 1001.

I tried to test the compression tonight but my compression tester didn't reach down the spark plug bore

It's running on Hondata s300. I also have a close ratio gear kit and lower final drive fitted but I don't think its that.
 
When was the last service?

It's probably nothing just another unreliable dyno.
 
What kind of induction kit have you got? And can you be more specific on exhaust setup. One thing I would check first off is to verify that your cam timing is not off
 
Also did you run the car on stock ecu first to get a baseline figure?
 
I'm not sure on the make of the induction kit. It has a tegiwa whales *****.

Exhaust is a japspeed 4-1 manifold with 2.5" straight through s/s power flow system with a Motorsport cat as a back box.

What's the best way to check the timing? Can this be checked on Hondata?
 
No I never had the stock ek9 engine Ecu when I fitted the engine so it wasn't run on stock Ecu. I tried to run it on an ek4 Ecu but didn't run.
 
You have a cat as a back box? You would need a timing light to check the markings on the timing belt when it's running and see where they line up with the notches.
 
Yeah Motorsport cat as a back box. Rally regs say it must have have a car fitted so I have it as a back box ;-)

I tried to use the original Ecu from the car and it did fire up but didn't run.
 
Do you have any flexi pipe joiner on your manifold to exhaust?
 
nwr161282 said:
I'm not sure on the make of the induction kit. It has a tegiwa whales *****.

Exhaust is a japspeed 4-1 manifold with 2.5" straight through s/s power flow system with a Motorsport cat as a back box.

What's the best way to check the timing? Can this be checked on Hondata?
Click to expand...

I am on about cam timing not distributor timing. Remove rocker cover and side timing belt cover, rotate engine until crank pulley is at tdc then see are the two marks on cam gears lining up
 
Doubt you can run a cat that far back in the system. Gasses will have cooled down a fair bit by then.
 
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