Car Cannot Take Timing

[89CAL]

Have you got the gasket/rubber and spacer washers for the CAS? the proper ones must be used

But you may have solved your problem. Hopefully its as easy as that

[Aggroman]

if all else fails buy my PowerFC.. why? cause I said so thats why

[LWO]

Only my 2c... (not an expert purely a tinkerer)

You are judging whether the car can take timing by a sound through a set of det cans? The car is pinging at peak torque? Take 4 degrees out at this section and see what happens to torque? Does the ping go away? The feed it back in and check whether the torque rises and then falls again and the ping comes back? Add more timing back in after peak torque?

I have heard a lot of what I thought was det but ended up not being det just other engine noises.

Maybe run the dyno run in a different gear to see if the ping goes away?

[LWO]

Only my 2c... (not an expert purely a tinkerer)

You are judging whether the car can take timing by a sound through a set of det cans? The car is pinging at peak torque? Take 4 degrees out at this section and see what happens to torque? Does the ping go away? Then feed it back in and check whether the torque rises and then falls again and the ping comes back? Add more timing back in after peak torque?

I have heard a lot of what I thought was det but ended up not being det just other engine noises.

Maybe run the dyno run in a different gear to see if the ping goes away?

[LWO]

Is the tuner old school enough to look at the plugs after a run to check for signs of det and heat range/electrode temperature to confirm det cans? The car must be shut down under the load conditions which is pretty freaky!

[LWO]

AFR sensor past it's due date? IIRC, they cannot read accurate rich when on the way out? I have a Motec PLM and almost new NTK sensor you can borrow if you need?

[Ben C34]

Is the tuner old school enough to look at the plugs after a run to check for signs of det and heat range/electrode temperature to confirm det cans? The car must be shut down under the load conditions which is pretty freaky!

I certainly wouldn't want to do that to my turbo. On an NA no worries.

[MagicMikeZ32]

I certainly wouldn't want to do that to my turbo. On an NA no worries.

Why not? It isn't like you have just finished pounding it at full noise for an hour straight?

[Ben C34]

Cos even after one dyno pull its heaps hot....

[XKLABA]

Any chance a rag or some form of obstruction got in to the intercooler and partially blocking it

I once found a 13mm ring open ended in the pipe work in my 32

[blah_blah]

Car is booked in for a dyno run next monday.

So should be able to further suss things out

Thanks for the suggestions

[petero'nell]

Had a mechanic leaving a piece of rag in my cooler piping which caused similar issue.

[zebra]

Why not? It isn't like you have just finished pounding it at full noise for an hour straight?

Because it would be spinning at 100k+ rpm then then you shut its oil supply off....

[LWO]

You guys do realize that most cars cut fuel on decel anyway? And the oil pump will keep pumping as the car coasts down on the dyno?

[LWO]

If you leave in gear.

[LWO]

May be a problem on a hub type dyno because of low inertia but not on a roller type

[LWO]

Back the load off the dyno at the same time as shutting off car.

[Dose Pipe Sutututu]

^ it's Trent man, he knows what he is doing

[LWO]

Who is Trent? Have I dissed someone without knowing?

Well we cannot say cam timing anymore.... So trying to think outside the box

And don't believe me I shut my car down under load on the road whilst tuning and the steering lock engaged..... Fun times!

[Ben C34]

Trent is from chequered tuning /status.

Also, he uses a dynapack hub dyno, which would not provide any inertia to run the engine down slowly after shutting it down.