I made a mistake with the lines, those lines I had didn't get along with heat, so fault was mine. Silicone would be ok I think, but it is not a problem for me to make a hardlines there, with banjo fittings. So I think I rather have bulletproof lines Lines are very close to manifold.

 

^^^ i dont know about those half-throttle pulls too. maybe your running lean doing that.

 

Do you have an EGT guage? It's a nice thing to have, normally WOT on Q16 by the end of the 1/4 pass I see 1,000-1,100F (post Turbo) (I do spray water as well), you would notice quickly if something was wrong looking at that. I saw it climb rapidly once when my Meth injection tried to F--- me and didnt spray

On a side note, I highly reccomend spraying straight water with a kit after the tune, it doesnt affect AFR's and helps tremendously. My Copper plugs at 800 miles look a lot better than 200 miles plugs without water injection.

 

Yep, I have invidual EGT monitoring for each cylinder, have to monitor cyl4 especially, when I get repairing done. At this moment I'm blaming detonation in cyl4 last summers setup, I had way too high backpressure readings. Now I have Full-race manifold which has bigger and shorter downpipe than mase kit original downpipe.

I will update when I get piston off and check the walls and rings.

 

Nice good to know!!

 

This is the head gasket you should be using its just an overbored oem head gasket. No reason to use anything else.

http://www.goldeneaglemfg.com/index....roducts_id=559

Regardless of the head gasket used it was not the cause of failure. Neither were the head studs which you are quickly looking to replace, Those studs have no problems holding 800-900+whp. 24psi with this engine and turbo setup is a lot on pump gas, although im not sure what the octane rating is in your country. I would hope it to be over 100 octane for the power you would be making. The car was tuned up to 33psi on pump gas? How much if any more power did the car make above 30psi than the mid 20's?

Hardlines may fix the problem but clearly your routing of the lines wasn't proper. The lines must have been sitting on the manifold and not heat-wrapped to fail.

 

If you were running pump gas why was your boost cut set to 35psi?

 

The boost cut at 35psi was my and my tuners fault, we had been fighting with my fuel pressure problems, and forgot to lower the boost cut
Pump gas octane here is 99 which I'm using, We also have 95 and 98.

wastegate lines were heatwrapped, but the material choice was wrong. As wastegate got hot, the lines melt from the connectors...

Thanks for the advice with headgasket, I will get that one. The marks in the cylinder btw weren't detonation, it was coolant which got in cylinder in small amount.

 

I'm sure everyone has said this but next time use boost cut. It's a great feature.

 

just get stainless lines, u dont need hard lines