mx5cartalk.com

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

Funny, I thought I had posted this ...

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

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

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

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

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

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.