what is exactly meant with "too hot"? far to advanced?
my thought is: high pressure of air (with streetported intake ports even more), so the mixture burns much faster than with low boost pressure and stock intake ports, which means the timing should be more retarded, so that the pressure rise in the chamber should occur ATDC. if it was too advanced, the pressure would be too fast at a very high level.

is this right? ported engines, or engines with high boost, should be more retarded to prevent knock and safe the engine? (does retarted timing mean boost loss also? )

any reply on my questions would be greatly appreciated.

 

Did your tuner just load an FD map into your PFC? Even the preloaded map timing from AP doesn't look anything like that.

 

A couple of things to add. I talked with fc3s91 and he mentioned they did about 30 pulls on the dyno while tuning, which is an excessive amount to me.
I also mentioned to him that the leading up top was to advanced, but they probably werent running it past row N18/P18. If timing was the issue it would have blown on the dyno.
He also said that when it blew it was at 4000 RPM on the street.

Jason

 

He did load his own maps. I thought the split was set to high. I was thinking more like 13 split. Im just learning this pfc. When I tunned it myself I set the split for 13. It ran great up to 10psi. That why I had a local tunier tune the car.
Thanks for all your response
Robert

 

Dyno tuning without a brake to keep the engine max loaded at a fixed rpm does not load an engine as much as 4th or 5th gear on a road.

I even use a steep grade overpass near my house in 4th gear to really load my engine and check knock levels.


As to explaining a problem: I will expalin what caused the problem but if you do not undertsand basic terminology or how your system works, that is your problem as you should know what you are working on. So I am a dick, that doesn't bother me.

 

That alot better. I don't care if you are a dick, Im an *******. I just need answer. I understand the basic terminology of my system, that is why I tried a one time to tune my car.
Thanks Robert

 

Probably the only way to tell what caused the problem is by looking at the logs. If you could get those it would help.

Jason

 

I have been trying to get the logs but no response. I gave him my email address.
As soon as I have them, I'll post them.
Thanks Robert

 

Here is a pic of the engine

 

wow your airfilter looks nasty!

 

You running an intercooler?

Forget I asked that, I see you are running an HKS.


Jason

 

What ignition are you running?
Barry

 

Stock ignition ( new coils and ignitors ). Yes that is a hks fmic. Recondition like new. New core and powder coated pipes.

 

I think I have came to a conclustion that timing in p17-p19 has to much timing and a mixture of bad gas. But I need to pull the engine out and inspect it. I just showed Steve Kan the maps and he said the same thing. BDC said it had to much timing in it and maybe bad gas. Thanks BDC for your time. I will give you a call when I have it apart. Great guy. I just wish he was closer. I will post back when I pull apart the engine.
Thanks everone
Robert

 

Thats a new fiter to.

 

I don't know how strong a FC's stock ignition is but firing a 10.8 mixture is difficult to impossible at 16 psi with a stock FD ignition. A missfire can chip an apex seal quickly. If you were datalogging, missfires show up as a lean spikes in AFR. Don't ask how I know.... I added a HKS Twin Power and no more missfire.
Barry

 

FC stock ignition is remarkably powerful; much more so than stock FD.

B

 

Hey Robert, this is Mike, I met you Saturday at Steve's shop. Sorry again to hear of this news. Hope to still see you at sevenstock, are you going to drop another motor in the car or bring the other FC?

 

how do you mean that? the stock FC ignition is much more retarded than FD ignition, so tells iwan, and so is telling me my base FC map compared to a FD map.

 

?

 

well what i want to say is, BDC mean the FC ignition is powerful, much more than the FD ignition, did i understand it right?
but the FD ignition is more advanced than the FC ignition.

 

Hey Mike,
I will be bring my vert or my friends fb. The engine will be out next weekend and checking for damage. I hope not much.
Thanks Robert

 

So if and when I rebuilt , what portion of the map should I change the timing to. And how much timing do I retard it to. I know you guys say p17 and p18, What should it be.
Thanks Robert

 

I'm referring to the actual hardware. It's very, very powerful.

As far as advance or retard between FC and FD, there shouldn't really be much practical difference.

B

 

Any suggestion?