Post your turbo, timing, fuel and fuel ratio!
 

Lets see what what you guys and gals are all running because I think mine is too high! Ill start off....

EvoIII 16g
19 degrees + 5 base
E85
11.8:1 (Gasoline stoich)

Re: Post your turbo, timing, fuel and fuel ratio!
 

Boost and compression ratio would help too.

Also, if your logger says 19 degrees, then that already includes the 5 degrees base.

Re: Post your turbo, timing, fuel and fuel ratio!
 

9.0 Compression
60-1 @ 27psi
17 degrees
E85
~11.3:1 at WOT

Re: Post your turbo, timing, fuel and fuel ratio!
 

EVO III 16g @ 22psi
AFR ~ 11.8 - 12:1 (I love Meth!)
Timing = 19 degrees at redline

Re: Post your turbo, timing, fuel and fuel ratio!
 

Evo316G, 22 psi
E85
AFR - 12-12.5
Timing is 15max.

For some reason the car likes it that lean, richer and it knocks and doesn't drive as nice.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Evo8 (stock compression) w/ IX 16g, 29psi peak
100% methanol or 50/50% methanol, same results, except afr
11.4:1 (100% meth), 11.8:1 (50/50)
Timing is 15-16 way up top but 14 through the main peak power section.
I've been trying to find a way to get the car to run more timing, but it just wants to knock.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Evo3 16g - 27psi
E85
AFR - 12.5
Timing - 19

Re: Post your turbo, timing, fuel and fuel ratio!
 

Your timing might even be a little low if you're on a stock motor. I use to run 22-24 degrees on a 20g / dual sides mounted up front on 92.

You didn't mention your intercooler either, which also plays a big role in timing.

Re: Post your turbo, timing, fuel and fuel ratio!
 

My wife's car:

SC61
E85
13 degrees
11.0:1 A/F (It changes though depending on mix or mood)

Re: Post your turbo, timing, fuel and fuel ratio!
 

So am i running on the dangerous side of being at 12.5?

Re: Post your turbo, timing, fuel and fuel ratio!
 

I have slowboy's front mount. I also didnt know the 5 initial was included in the logger.

So I assume it always assumes 5 degrees no matter where it is on the logger?

Im pushing coolant and was trying to figure out if my cylinder pressure is too high. Maybe its time for a head gasket. I do have a cometic with arp head studs right now.

Re: Post your turbo, timing, fuel and fuel ratio!
 

No your good, I'm running the same A/F but with 19 degrees of timing. Also not to mension when we went to the track I was running a 15.2 afr and didn't know that til the dyno..

Re: Post your turbo, timing, fuel and fuel ratio!
 

You might be fine. I usually just run them richer to have some amount of safety in case the mix changes or something goes wrong. And I haven't seen much for gains running E85 cars leaner, unlike with race gas, so I don't push it. I have actually had some all-motor E85 cars make more power running about a point A/F richer than we would normally run them on gas.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Well regardless im pushing coolant. Now I got a misfire at idle and cruising. And I see water coming out my tailpipe. Time to pull it!

Re: Post your turbo, timing, fuel and fuel ratio!
 

Well I pulled my spark plugs and found on one of the plugs, the insulator that goes around the center electrode had somehow moved all the way down the electrode, probably causing my idle misfire, by arcing internally or not sparking at all.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Maybe you want to start your own thread, instead of hijacking this one.

Re: Post your turbo, timing, fuel and fuel ratio!
 

^Um, noob. He started this thread so that he could figure out if his problem was with the tune he did.
He gave us the results.

Re: Post your turbo, timing, fuel and fuel ratio!
 

What kind of plugs are you using? I have had the happen to me twice with Autolite plugs, I switched to NGK and its never happen again.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Im runnin BPR8ES plugs gappped at .026.

I was told they may be tool cold running e85 and may be causing cylinder freeze which causes detonation. I will find out today as im gonna put in bp7es's in gapped at .024

Re: Post your turbo, timing, fuel and fuel ratio!
 

We run 8s in my wifes car and almost every Evo 8 runs 8s. .026" gap is on the bigger side for an higher boost E85 car though.

Re: Post your turbo, timing, fuel and fuel ratio!
 

I was told by a gentleman at Map that running 8's with e85 could cause something called spark freeze or cylinder freeze. I dont remeber which one he said. but he said that running too cold of a spark plug may cause detonation.

He said he runs 7's gapped at .22 running 28 psi on his EVO, so I dunno.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Running too cold of a plug can cause misfires and and misfires often show up as knock or cause actually knock.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Usually though, the main reason to not run too cold of a plug is to avoid fouling at part throttle/idle.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Yeah I knew that, but ive never heard of cylinder or spark freeze, or whatever he said. Do you know what it is? Im think im gonna get 8's and gap then to .020-.022

Re: Post your turbo, timing, fuel and fuel ratio!
 

Also could you explaine to me the behaviour of having spark plugs gapped too high? Misfire, detonation?

Re: Post your turbo, timing, fuel and fuel ratio!
 

Also, whats the disadvantage of having them gapped too low? Such as .018 or something.

Re: Post your turbo, timing, fuel and fuel ratio!
 

I know the higher the cylinder pressure, the harder it is for the plug to fire.

Tv picture tubes are actually in vacuum so it can shoot electrons across the screen. <----- Neat tid bit

I just want to know if it can cause detonation.

Re: Post your turbo, timing, fuel and fuel ratio!
 

E85
AFR's around 12ish
timing was like 20-22... stock plus 3.
21-22psi.
That seem like alittle much on the timing?

Re: Post your turbo, timing, fuel and fuel ratio!
 

E85
14b
20 PSI
~11.5 AFR (petrol scale)
20* of advance @ 6500 RPM

No knock yet!

Re: Post your turbo, timing, fuel and fuel ratio!
 

Too big of a gap can misfire under boost/hiogh cylinder pressure. Too small of a gap can make idle and part throttle drivability worse.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Well I put in bpr7es's at .022. No change and pushing coolant in the higher gears at 28 psi.

I guess its time to remove my cometic and put in a composite gasket with some new head studs. Woo hooo

Re: Post your turbo, timing, fuel and fuel ratio!
 

Plugs aren't gonna change a serious problem like pushing coolant.

Re: Post your turbo, timing, fuel and fuel ratio!
 

If my pre detonation was causing it then maybe.

What do you guys recoomend for a really good composite head gasket? Or any head gasket that doesnt require an RA of >50

Re: Post your turbo, timing, fuel and fuel ratio!
 

Just use a stock Mitsu one.

Re: Post your turbo, timing, fuel and fuel ratio!
 

9.2:1 compression
47psi gt4202 w/ 1.01 divided housing
BPR8ES @.032
~5 deg timing
12.0:1 AF on C-16
rev limit 9500rpm
Also a leaner cylinder is harder to fire, in addition to pressure and plug indext.

~John

Re: Post your turbo, timing, fuel and fuel ratio!
 

Ok well I went out and adjusted my base timing to 0 degrees BTDC.

Jeff at Keydiver has my max timing advance to 19-20 degrees.

I think it ran pretty dam good and I dont think it pushed any coolant at all. So either my timing is too high or my head gasket just cant handle the cylinder pressure. :scared:

The computer has no idea what the base timing is so if the logger says 19-20 with the base timing of 0, what am I really at?

What am I really at when im at when im at a base of 5 degrees BTDC and logger says 20?

If the computer assumes im at 5 then with my base at 5 my peak is 20

If the computer doesnt assume 5 then with my base at 5 my peak is 25

Re: Post your turbo, timing, fuel and fuel ratio!
 

Do you still have stock head bolts in? It sounded like you were talking about putting studs in.

Re: Post your turbo, timing, fuel and fuel ratio!
 

I was talking about it because I always want to be on the safe side and replace my arp's in case they have stretched.

Re: Post your turbo, timing, fuel and fuel ratio!
 

Yes, I'm a noob and don't know anything.

Sorry, it was an honest mistake. I didn't realize he was the OP.

Re: Post your turbo, timing, fuel and fuel ratio!
 

The computer assumes that the ignition timing that it is trying to run actually is happening. It isn't adding or subtracting any base offsets. In actuallity, when you lock the timing at 5 degrees by grounding it and then set it at 5 degrees with the timing light all you are doing is making sure that what the ECU says it is running actually happens. When you lock the timing, then it locks to 5 degrees in the datalogger also and you just make what happens at the motor match the computer. You could take the whole timing map and set it at 10 degrees or whatever and then hold the rpms at 1500 and sync the engine timing to the ecu timing that way also. So with correctly synced timing, if the datalogger says 20 degrees under boost, then thats what should be hopefully happening at the engine.