down on power

evil_weevil · Postby **evil_weevil** » Fri Jan 16, 2015 9:58 am

morning all,
long time no post.

so my NA8 has some form of aliens!
late 2013 I got cams and ecu fitted and tuned, made 94rwkw and managed to lap a 1.11.8 @ wakie.
I managed to get to wakefield in Nov 2014 and all we could manage was a 1.14.3
I struggled to hit 140kms down the straight where usually I am hitting 160 give or take.

back at the workshop and car is only make 77rwkw
comp is fine with all 4 around 171-179 so consistent.
cams apparantly are all in same timing etc, no changes to the tune - still as is

so now I ask, what the fk!!!
any ideas?
Chris

greenMachine · Postby **greenMachine** » Fri Jan 16, 2015 10:38 am

Funny, I thought I had posted this ...

Could be cat, they can choke up, or fuel filter.

:mrgreen:

JBT · Postby **JBT** » Fri Jan 16, 2015 2:11 pm

Crankshaft keyway wear? 1.8 is not immune.
Cam belt jumped a tooth on the crank gear?

manga_blue · Postby **manga_blue** » Fri Jan 16, 2015 5:26 pm

Usual suspects: old/bad fuel, plugs, leads, stretched throttle cable, timing drift, AFR drift, exhaust blockage, air filter/intake blockage, dirty MAF, dodgy MAP, ECT sensor failure, dying fuel pump, fuel filter/line blockage, ....

Also don't discount driver error.

Maybe you're just slower getting out of turn 10 and getting the power down later. Runs and hides

Smokinscotty · Postby **Smokinscotty** » Fri Jan 16, 2015 9:19 pm

Go to Dann's.... Force some kws down its throat!

evil_weevil · Postby **evil_weevil** » Sun Jan 18, 2015 3:35 pm

Stretched throttle cable you say?
I did replace it not too long ago...

All the others are all ok apart from fuel filter which I'll change soon

manga_blue · Postby **manga_blue** » Sun Jan 18, 2015 5:54 pm

Just check that you're getting full throttle opening.

Honestly I reckon fuel that just sits there going stale between meetings is one of the main causes of lost power in a track pig.