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Chris Davey
Forums Junkie

Location:
sunny coast, qld
Registered:
October 2002

Re: 8psi extra, 10rwkw extra?

Sun, 17 July 2005 02:37

oldcorollas wrote on Sat, 16 July 2005 21:07

do the 1J's have crank pulley timing marks? is it possible to get a timing light onto the thing to se what the timing is actually doing?up unti 5300, it looks good (ie torque increasing), but above that torque decreases dramatically...

so either
a) not enough air going in (intake tract/manifold/filter restrictive?) FMIC is known to be able to flow enough? temp of inlet air increases dramatically around 5300?
b) exhaust is having hard time coping.. from the sound of it it should be ok.. but maybe wastegate is opening? did you check the boost levels as it spooled up?
c) not enough/too much fuel... AFR, even if not accurate, doesn't look nasty.. was going to suggest maybe plugs are not up to the job, but then you should see it on AFR?
d) timing whacky, being pulled out too much..or stock MAP sensor rooted?

since the power flattens out for so long, it looks like the mass of air going in may not be increasing past that point either due to temps (hotter air = more boost for same mass of air), or due to flow restriction (ie something reaching the limit of it's flow....

can you check timing real-time the old fashioned way?
put boost gauge before AND after the FMIC?
measure air temps before and after FMIC?

just a few (possibly crap) ideas Wink

Cya,Stewart

I will see what I can do regarding the timing. I think I can get access to a timing light to check it out.

a)It is the standard intake manifold so it should be able to flow more than 200rwkw pretty easily. It is not the best but it is sufficien I would have though. Cooler has been used on many cars making a lot more power than mine is also so that should be ok I think.
b)It seems to take quite a while to spool and the boost comes in pretty gradual. Sits on 0psi for a bit and around 4000rpm starts to build slowly and then increases quickly from there.
c)It is rich. I have checked out the plugs and they are indicate it being rich. They are the recommended plugs for 1j's now gapped to .7mm.
d)could be the timing but will have to check. It is using the wolf internal map sensor and I think that should be ok. I don't understand how the map sensor affects the power up top. If it is reading the correct amount of boost then it should be ok. It was reading the same as my boost guage.

Also, I have just done the compression check and it came back with 165-170 in all cylinders so that is good.

Also, Allan: how would the situation change if I was to use an ma70 gearbox ecu because I would assume that it would need the same signals inputted as my current ecu. The problem is that the ecu requires signals to change the gearbox and the wolf needs the same signal to do timing.

Thanks for the help guys Smile

I am going to go and check that my o2 is still reading the same as the Motec one and then go and do some logging and check it out. Once I have got the a/f's sorted and checked other stuff I will put it on the dyno again. But I am going to a different dyno that is shootout and does it in 3rd gear.

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