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Old 10-05-2008, 12:57 AM   #1
Kaldar142
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Default which gaskets for hybrid?

Hey guys,

i'm gathering all the parts for my hybrid build and i was wondering which gaskets i need for the hybrid setup?

i want to replace everything with new gaskets so which ones do i need?

also what thickness HG do i want?

-Joe
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Old 10-05-2008, 01:24 AM   #2
reddevil
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Well there are a variety of options out there. I am assuming youi are using a 2.5 block and 2 liter heads? The biggest factor is of course the thickness. The thinner, the more complications that can occur, from higher compression, to valves touching the pistons...

Personally I have been sticking with the thicker metal NA three plys and had no problems, other than a lower compression.
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Old 10-05-2008, 05:36 AM   #3
Kaldar142
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yes, what about the STi oem headgasket? with 2.0l wrx heads
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Old 10-05-2008, 12:15 PM   #4
rainwrx
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I'd recommend the oem STi head gasket. In fact, get the entire engine gasket set for an STi 2.5 engine. In addition, you'll need 2.0 valve cover gaskets and 2.0 1/2 moon gaskets (set of 4) for the 2.0 heads.

This is what I've used with my hybrid...
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Old 10-19-2008, 02:39 AM   #5
Kaldar142
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hey guys, i lost the list i made for all the pieces i needed for my hybrid build......


what gaskets do i need, what parts do i need... etc?
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Old 10-19-2008, 03:28 AM   #6
hybrid gti 2
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Interested in this thread as well. Lower compression or stronger head gasket. Or can you have both?
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Old 10-19-2008, 07:26 AM   #7
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the new 2.5 n/a and turbo gaskets are identical except for thickness. Although actually there are three 2.5 turbo gaskets now. The 07 and 08 sti each have their own different ones. Stick with the 06 and earlier gaskets.
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Old 10-19-2008, 11:17 AM   #8
m3joe46
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Quote:
Originally Posted by jamal View Post
the new 2.5 n/a and turbo gaskets are identical except for thickness. Although actually there are three 2.5 turbo gaskets now. The 07 and 08 sti each have their own different ones. Stick with the 06 and earlier gaskets.
anyone know which is the thickest??
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Old 10-21-2008, 05:04 AM   #9
Kaldar142
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anyone???
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Old 10-21-2008, 10:41 AM   #10
suberdave
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the N/A 2.5l Phase 1 is 1.52mm thick C/R should be ~ 8.24:1
the N/A 2.5l Phase 2 is 0.58mm thick C/R should be ~ 8.93:1
the turbo STI 2.5l 04-06 is 0.6mm thick C/R should be ~ 8.91:1


all info taken from Matt's Compression Ratio Calculator


-=Suberdave=-
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Old 10-21-2008, 11:04 AM   #11
hybrid gti 2
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Now what is the best gasket? As I read some stuff about people blowing other then sti head gaskets. I don't know about anyone else but I dont want to do this more then once.
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Old 10-21-2008, 06:15 PM   #12
rainwrx
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It was recommended to me by several engine builders and tuners to go with the OEM STi head gaskets. Yes, your compression will be a bit higher with stock pistons, but that is not a problem and can be tuned just fine.

My hybrid with CP pistons (stock CR) and OEM STi head gaskets runs great. Right now I'm running an 18g @20psi with no problems and am now looking at a dominator 3 turbo. I anticipate no issues with that either.
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Old 10-21-2008, 07:40 PM   #13
Kaldar142
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Which gasket set do i need though?

i'm asking what parts do i need to do a full hybrid swap;

oil pump
water pump
wrx overhaul gasket set
STi headgasket
thermostat

what else do i need or is that it?
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Old 10-21-2008, 08:45 PM   #14
paintbing
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Go here... Tristan can hook you up (thekingofparts - NOT associated with kingpin)

http://www.5-starperformance.com/ser...ock-%26/Detail

This is what you want... They have it all packaged together.

I think the only thing else you'll need are new headbolts... but that is all in the eye of the beholder.
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Old 10-21-2008, 09:07 PM   #15
Kaldar142
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i was going to use ARP headstuds instead
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Old 10-22-2008, 01:15 AM   #16
hybrid gti 2
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Tuner told me oem if staying around 400 whp
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