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Old 11-06-2021, 06:51 PM   #101
PotatoFlakeSTi
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Old 11-10-2021, 03:25 PM   #102
PotatoFlakeSTi
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Tuner managed to blow my headgasket at 695whp/630wtq, think this was the first or second pull with the new pumps


I asked for uncorrected numbers which were 567whp/514wtq, not sure why the headgasket would have gone besides detonation.

They said too much boost is possible, but with the reduced backpressure from the bigger turbine housing, and the 2.5" cutout, why now and not before?

They're covering the parts cost this time. As they should.
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Old 11-10-2021, 03:34 PM   #103
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Back pressure doesn't correlate to cylinder pressure.

Sorry to hear about your experience. Glad the shop is doing right by you.
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Old 11-10-2021, 04:10 PM   #104
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
Back pressure doesn't correlate to cylinder pressure.

Sorry to hear about your experience. Glad the shop is doing right by you.
Ah, good point.

Turnaround shouldn't be too long this time, hopefully this week.
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Old 11-11-2021, 05:57 PM   #105
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Here are some pics... Don't really see any obvious signs of detonation looking at these on my phone, and spark-plugs looked fine.





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Old 11-11-2021, 06:35 PM   #106
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what headgasket were you using?

I had my JE Proseal HG fail on the dyno a couple weeks ago but I think it was due to them being bent when I got them, despite JE telling me they were ok to use.
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Old 11-11-2021, 08:14 PM   #107
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Quote:
Originally Posted by Waddlz View Post
what headgasket were you using?

I had my JE Proseal HG fail on the dyno a couple weeks ago but I think it was due to them being bent when I got them, despite JE telling me they were ok to use.
They were JE ProSeals, nothing looked out of whack when they were installed.
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Old 11-11-2021, 08:15 PM   #108
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IAG firelock and oring style gaskets are the way
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Old 11-11-2021, 08:23 PM   #109
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
IAG firelock and oring style gaskets are the way
Yeah in hindsight I should gone with the Magnum block, but the initial goal when rebuilding was only 550whp so I really shouldn't be complaining.
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Old 11-11-2021, 08:29 PM   #110
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Quote:
Originally Posted by PotatoFlakeSTi View Post
Yeah in hindsight I should gone with the Magnum block, but the initial goal when rebuilding was only 550whp so I really shouldn't be complaining.
Magnum block is what I plan to use.

Going to speak with James at IAG tomorrow or next week about the best way to make the magnum work with 207 Spec C big port heads, probably by machining the heads and machining the block.

Also gonna ask if if they'll warranty a block if I use Spoolinator kit on it

Last edited by K3rm1tth3fr0g; 11-11-2021 at 10:15 PM.
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Old 11-12-2021, 12:26 PM   #111
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
IAG firelock and oring style gaskets are the way
At his power level, yes I agree

I'm making ~500whp corrected and I'm at the same altitude as him, so in reality its 18 to 20% CF on the dyno.

I ordered OEM gaskets.
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Old 11-12-2021, 05:29 PM   #112
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It is not impossible but very hard to make E85 detonate (Iím assuming you were running E85). Detonation was probably not the cause of the failure. Getting greedy with timing could cause cylinder pressures to be high which could pop a gasket. But there are other factors that could cause a failure like that as well like a defective head gasket, improper surface finish on the deck of the block or head, improper torquing procedure. Not always the Tuners faultÖ
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Old 11-12-2021, 05:59 PM   #113
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Quote:
Originally Posted by PotatoFlakeSTi View Post
Here are some pics... Don't really see any obvious signs of detonation looking at these on my phone, and spark-plugs looked fine.







I suspect that Waddlz will look the same... Basically we probably won't be able to spot anything. I was the tuner on his and we stepped up timing until the gains started slowing down, then backed it off. I was a bit surprised he started pushing coolant.


I would have like to have had more time this day to dial it all back in after the compressor cover change, but we didn't want to push it any further at this point.

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Old 11-16-2021, 11:52 AM   #114
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Got my car pulled apart this weekend, here is where I suspect the JE Proseal failed

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Old 11-16-2021, 06:54 PM   #115
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Quote:
Originally Posted by Waddlz View Post
Got my car pulled apart this weekend, here is where I suspect the JE Proseal failed

Yea that could do it.
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Old 11-16-2021, 08:37 PM   #116
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Thanks for the input everyone.

Engine is back in the car, back on the dyno tomorrow or Thursday.

I spoke with Zach from ZF Design/Trans briefly and he suggested copper rings? Anyone have more info/details on that option if the gasket goes again?
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Old 11-16-2021, 09:25 PM   #117
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Quote:
Originally Posted by PotatoFlakeSTi View Post
Thanks for the input everyone.

Engine is back in the car, back on the dyno tomorrow or Thursday.

I spoke with Zach from ZF Design/Trans briefly and he suggested copper rings? Anyone have more info/details on that option if the gasket goes again?

Machine the block and use IAG firelocks. They're the best out right now.
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Old 11-16-2021, 11:05 PM   #118
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
Machine the block and use IAG firelocks. They're the best out right now.
Really just don't want to wait for the machining.
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Old 11-16-2021, 11:21 PM   #119
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O ring style gaskets (like the firelock) are how you psychically contain the cylinder pressures you are seeing at these boost levels.

Last edited by K3rm1tth3fr0g; 11-17-2021 at 06:36 PM.
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Old 11-17-2021, 06:35 PM   #120
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Definitely need Orings (firelock is the best). Since you solidified the rods, pistons, bearings, cylinder walls, the next weak point is the head gasket. Such is life modifying an econobox
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Old 11-18-2021, 05:06 PM   #121
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Quote:
Originally Posted by PotatoFlakeSTi View Post
Thanks for the input everyone.

Engine is back in the car, back on the dyno tomorrow or Thursday.

I spoke with Zach from ZF Design/Trans briefly and he suggested copper rings? Anyone have more info/details on that option if the gasket goes again?



Might want to ask Zach to elaborate, as he could be referring to Cooper Ring Head Gaskets which may use copper rings? I've heard good things about them up to 750-800whp. I personally went the Firelock ring route and will see how it fairs on 45-50psi in the Spring
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Old 11-18-2021, 07:51 PM   #122
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Quote:
Originally Posted by ARKTiKPENGUiN View Post
Might want to ask Zach to elaborate, as he could be referring to Cooper Ring Head Gaskets which may use copper rings? I've heard good things about them up to 750-800whp. I personally went the Firelock ring route and will see how it fairs on 45-50psi in the Spring
Yeah that's what Zach was talking about - but MoFab put it back together with JE ProSeals... Really wish they would have mentioned those before they went that route.

https://www.iagperformance.com/iag-c...-studs-1-pair/
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Old 11-18-2021, 07:59 PM   #123
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I dont feel the cooper ring gaskets would last very long being that they are composite, but at 750 to 800 whp you're not really expecting longevity out of this engine.
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Old 11-19-2021, 10:25 AM   #124
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I did push a little coolant with the IAG cooper Oring (before they developed Firelock) around 38psi at 650whp on a 62mm turbo (45k miles). Now with IAG firelocks I have no coolant loss at 40psi at 800whp on a 64mm turbo (12k miles)
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