I'm getting too much blow by gas.

If I open oil cap and rev it up I can see almost like a half yard stream of gas.

I have a catch can and it fills up quickly and mostly it's raw gas.

so I assume it's side seal clearance problem.

but funy thing before warmup there is no blow by at all I thought if side seal has too much

clearance it should blow by more when cold.

am I missing anything?

thanks.
Ivan

 

just a shot in the dark here, is the car running pig rich?

 

11-12 when idling.

 

thats a pretty rich idle. i think it should be more like 14 afr

 

Wow, that is rich. I'm running between 13.0 13.5 at idle.

 

Mine idles even richer than that (dang 850 primaries) and I do not have this issue so I don't think that is your problem. If you are on stock injector setup you do also have a tuning problem in addition to this one..

 

good lord thats a damn rich idle a/f ratio.

what ECU? PFC? get it tuned, sounds like its on the base map

 

in my experience modified ported motors can idle stably as lean as 12.5 - 13.0 .

 

Yes it was the rich idle problem damn stupid tuner..
after I adjust to 13:1 it cleared up now I really belive too much gas can washes out oil so looses sealing.
now I don't know If Ican trust my Load map.I paid 400 bucks for this crap map!!

anyway some have too much blowby check your IDLE A/F

youguys saved one engine.

BTW I'm running microtech LT10 street ported and 60-1

Thanks everybody.

Ivan

 

Dude I noticed the same problem on my friend's FD with a rebuilt Bruce Turrentine motor. He was running the PFC basemap and cold start idle was in the low 11's... it blew out a bunch of blue smoke. Once we got it dialed in it would have a small puff of grayish smoke for a couple seconds on startup (nothing unusual) and be fine after that.

I have a lot of trouble trusting tuners. There are maybe half a dozen in the US I would go to, and thus I ended up doing it myself. Something like cold start can take a LOT of time to tune. So either you have a pretuned map that closely matches your car's setup (as many professionals do), or you do it the old fashioned way: tune it on every cold start until you get it right. Since you have a Microtech, which I think still can't save/copy maps, your tuner would have had to spend a lot of time on it to get it right. The proper way would be for him to hold your car a couple days and crank it up each morning for a cold start, smoothing out IAT and water temp correction as it warms. That's how I've done it on a couple cars.

 

leaning out the idle with 850 primaries and the PFC can be a real challenge...I'm still in the 11s...but I don't think that in itself would cause the excessive blowby, have you had your % fuel dilution checked?

 

well I haven't checked my dilution well I don't even know how to check.
anyway I don't think my problem was only excessive fuel but somehow it was major factor though.I'm thinking my new side seal was not fully seatted and too much gas was preventing if from seatting.

thanks..