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Baron's '05 STi journal - **Carbon bits installed**
Baron's '05 STi journal - **Carbon bits installed**
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Old 07-13-16, 05:35 PM   #641
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

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Originally Posted by Legba View Post



If the process is well controlled, documented, with the right tools in place, and quality control. They should be as good as any commercially available performance crate engine. At that rate though, a non-perfect process, is going to show itself in short order.

It's funny you say that... My dad's RamJet 350 crate motor had the wrong head gaskets installed from the factory. He fought overheating for a long time and when he pulled the heads to put in new gaskets, it was very apparent that the wrong gaskets were used. Now he doesn't have issues.


As for the ring gap, what rings did they use? The Total Seal rings I used (came with the pistons) required fairly large gaps.
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Last edited by yamahaSHO; 07-13-16 at 06:51 PM.
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Old 07-13-16, 06:11 PM   #642
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

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Originally Posted by yamahaSHO View Post
It's funny you say that... My dad's RamJet 350 crate motor had the wrong head gaskets installed from the factory. Now he doesn't have issues.
Maybe that's what happened here
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Old 07-13-16, 06:38 PM   #643
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

They installed the set of Manley rings that came with the pistons.

Legba, are you insinuating I used the wrong gaskets? Because IAG has used these before without issue. Also, in what way are they wrong? Because with a factory style gasket there would be way more open gasket space since the factory design is semi-closed deck; you do know I have a closed-deck right?
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Old 07-13-16, 06:50 PM   #644
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

My Manley pistons came with Total Seal rings.

Without going back and comparing gaskets, they should take on about the same shape. All that really matters is they seal the right parts.
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Old 07-13-16, 06:53 PM   #645
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

Perfect opportunity to put 625s in

No point in having a closed deck and rods that can hold 700whp and ARP2000s that hold 550-600whp IAG has lifted heads with ARP2000 on E85 at 650-700whp and later clamped them down with 625s

I'm using JE Pro Seal with their closed deck for 8000 miles now, no problems
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Old 07-13-16, 07:12 PM   #646
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

Jason, I just checked the part numbers and you are correct; the Manley ring set is supplied by Total Seal.

user, thanks for the feedback and chiming in about the gaskets. I must say though I really don't see myself going into that power range. I wanted tough parts to deal with tough use, not necessarily tough power. So yeah I overbuilt a little, but the price was right on many of the components that were better than others for the money I was already planning to spend. But I get what you're saying. I will consider more about the 625s.

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Old 07-13-16, 07:45 PM   #647
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

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Also really wish my situation were different ATM, I'd come me out to help.
Thanks for the consideration Darryl. Means a lot.
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Old 07-14-16, 02:35 AM   #648
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

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Originally Posted by BaronOBeefdip View Post
Legba, are you insinuating I used the wrong gaskets?
It was sarcastic. I was making a funny.

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Originally Posted by BaronOBeefdip View Post
Because with a factory style gasket there would be way more open gasket space since the factory design is semi-closed deck; you do know I have a closed-deck right?
Unless they are using a custom gasket to seal off all 'closed' areas, the seals are still in the same spot. While the closed areas don't see actual flow, they are still exposed to fluid. Anything between the inner seal and outer seal will see coolant fluid/pressure.

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Old 07-14-16, 04:46 AM   #649
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

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Originally Posted by Legba View Post


Unless they are using a custom gasket to seal off all 'closed' areas, the seals are still in the same spot. While the closed areas don't see actual flow, they are still exposed to fluid. Anything between the inner seal and outer seal will see coolant fluid/pressure.
Exactly. The holes in the gaskets are usually not going to vary in size/location even between manufacturers. They meter the flow of coolant through the block and head castings, and since the OE coolant hole locations and sizes work well, there's really no reason for aftermarket manufacturers to stray from that design.

Generally with any MLS head gasket, the biggest improvements can be made in the combustion seal, oil/coolant port sealing and the coating. The JE's are fine gaskets, I would say better than OE. The OE gaskets have been proven to work for many people when paired head studs, but they aren't anything special. I don't think the JE gaskets are the issue, it's more likely a surface finish/flatness issue.

FWIW - I used 625+ studs on my non-closed deck build. They're a bit overkill but I wanted the extra "insurance." However, You may want to stock with the studs/torque specs that were used when your block was machined/cylinders were honed. I don't know how much additional bore distortion you'd see with 625+ studs torqued to 100 ft-lbs compared to standard ARP's torqued to 90, but assuming the block was honed with a torque plate, the cylinder shape should be optimized for the studs are torque specs that were used during the machining process. Maybe the difference is negligible - I'm not a machinist or an engine builder so I couldn't tell you. Maybe the closed deck helps to minimize bore distortion as well, so maybe you could get away with the 625+ studs?

Also, if you upgrade studs you'll want to re-check valve lash. It's surprising how much the lash changes between setting lash on a table vs. setting lash with the heads torqued to the block. Using higher torque specs/studs that apply more load will likely affect lash. Factory lash is all over the place on used cams/buckets so you should re-check it anyhow.
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Old 07-14-16, 05:31 AM   #650
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Default Re: Baron's '05 STi journal - **Motor is comin' out again...coolant leaks...**

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the cylinder shape should be optimized for the studs are torque specs that were used during the machining process.
Absolutely! This will set you up for the most ideal and optimized conditions.

Quote:
Originally Posted by Kyle_05_STi View Post
Also, if you upgrade studs you'll want to re-check valve lash. It's surprising how much the lash changes between setting lash on a table vs. setting lash with the heads torqued to the block. Using higher torque specs/studs that apply more load will likely affect lash. Factory lash is all over the place on used cams/buckets so you should re-check it anyhow.
^ listen to this guy he knows his sheet!
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