Turbo Noob! Should I adjust my timing? - Miata Turbo Forum - Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 02-11-2010, 09:24 PM   #1
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Default Turbo Noob! Should I adjust my timing?

Just installed my turbo and it seems to be running fine at idle and under boost, but I have read somewhere (in this forum or on miata.net) that certain prefab kits recommend retarding the timing (I believe that it said 6 degrees BTDC) Is this true? And please dont mock me if it is a stupid question because I wont know unless I ask! Thanks guys in advance and I look forward to your input.
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Old 02-11-2010, 09:28 PM   #2
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needz moar infoz!

psi, turbo, intercooled? ect
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Old 02-11-2010, 09:30 PM   #3
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Yes.

If you have no way of monitoring detonation it is definitely a good idea to retard timing. Its a really good idea to ask whoever sold you the kit what they recomend as well.

Too much timing advance starts the combustion of the air/fuel mix soon enough that you get a very rapid combustion that is more or less an explosion as the piston gets near TDC. This will crack ring land and result in shrpnel if not addressed.

How much is too much depends on a bunch of factors, but to play it safe I would definitely run less ignition timing under boost than you did while NA. Again, the best thing is to ask the maker of the kit. And stickies are your freind in a HUGE way.
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Old 02-11-2010, 09:32 PM   #4
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6 Psi, it is a Airesearch .50 trim .36 back and it is intercooled. Pics of setup are here!

https://www.miataturbo.net/forum/t43763/
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Old 02-11-2010, 09:34 PM   #5
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Well I cant ask the maker because I am the maker I put this kit together myself! Whole kit consists of Reliable, high quality, brand name parts!
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Old 02-11-2010, 09:42 PM   #6
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If you're running 93 octane and your AFRs are good, at 6psi you could probably get away without retarding the timing, but to be on the safe side you should probably pull 2-3 degrees from your base timing.

What you should really do is get some EMS that will allow you to further adjust your timing and fuel.
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Old 02-11-2010, 09:45 PM   #7
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I am going to, I just couldnt afford to do it all at once. MS should be coming when I get my income tax check
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Old 02-11-2010, 10:59 PM   #8
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I dont see a wideband on your list, run 8 degrees or blow your motor.
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Old 02-11-2010, 11:12 PM   #9
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+1 i would run -2* than stock just till you get your megasquirt.
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Old 02-12-2010, 12:11 AM   #10
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To be safe I would put it down to 6 degrees, which is what the Greddy kit recommends.
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Old 02-12-2010, 02:36 AM   #11
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Quote:
Originally Posted by Diablovt750 View Post
I am going to, I just couldnt afford to do it all at once. MS should be coming when I get my income tax check
Let's compare this with going into the beekeeping business...

I got the bees and hives but not the suit or smoke...I just couldn't afford to do it all at once.

How do you expect to get any honey (boost/reward) without being stung?

If you can't afford proper engine management/band-aids, wideband, whatever before you boost, I would bet a new motor will also be out of budget...

Keep your foot out of it until rectified...resist temptation, it is fine line between 6psi and a whole lot more, especially with the "global warming" that is snowing in much of the country. Good Luck!

Last edited by secretsquirrel; 02-12-2010 at 02:46 AM. Reason: Vodka
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