Stock internals - how much can they take

Q&A regarding engines, turbos, and intercoolers and power upgrades

Stock internals - how much can they take

Postby SuperRunner » Tue Oct 19, 2004 9:53 pm

I am new to the 3SGTE world, and I did a search, and am not finding too much info on how much stock internals can hold.

I also want to know if anything else needs to be upgraded to get 300rwhp besides pistons.
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Postby Zeus » Tue Oct 19, 2004 10:44 pm

teh record so far is 528 rwhp held by al powers in an mr2... this was using a stock bottom end.. INCLUDING stock pistons
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Postby -==L=a=N=c=E==- » Tue Oct 19, 2004 11:29 pm

The stock bottom end is quite sturdy, if its low milage. But most high milage engines are starting to get a bit tired, and lose compression.

The only real thing you need to upgrade is the HeadGasket. As the stock gasket likes to let go at nything about 1.2Bar (17PSI).

If you want reliability, then you'll need to upgrade pistons and rods. But by that stage you would know what your goals are.
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Postby Stubble » Wed Oct 20, 2004 2:24 am

Super,
Our forum was restarted in August, so lots of old posts got lost. For info on the engine, checking out www.mr2oc.com in the Mk2 3S-GTE section will give you much more info on mods/power levels.

Another good starter (although Zeus doesn't like it :P ) is the power primer at www.mrcontrols.com
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Postby Zeus » Wed Oct 20, 2004 3:33 am

Stubble wrote:Another good starter (although Zeus doesn't like it :P ) is the power primer at www.mrcontrols.com

I dont?
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Postby furpo » Wed Oct 20, 2004 11:07 am

it would also depend on how you are going to get your power as to what you can make on stock internals. anyway 300 whp is very achievable. the only thing you will have to do is the clutch and as mentioned maybe the head gasket. as said it is a good idea to start with a fresh engine but not a must.

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Postby RedCelicaTRD » Wed Oct 20, 2004 9:01 pm

Ive boosted up to about 22 psi many a time and Ive never blown a headgasket. When i blew my motor i took out the side of a piston and cooked a valve but the headgasket was fine. I guess I just have more faith in the stock headgasket then the rest of you.
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Postby SuperRunner » Wed Oct 20, 2004 9:13 pm

RedCelicaTRD wrote:Ive boosted up to about 22 psi many a time and Ive never blown a headgasket. When i blew my motor i took out the side of a piston and cooked a valve but the headgasket was fine. I guess I just have more faith in the stock headgasket then the rest of you.


What turbo were you using when you boosted to 22?
1993 Supra - sold
1993 GS300 900rwhp
1993 Lexus SC400 - supercharged
1991 MR2
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Postby Stubble » Wed Oct 20, 2004 10:13 pm

Sorry Zeus, I remember reading some time back that you had some issues with the Primer. No big deal, that was a friendly razz. And if I'm mistaken, well slap me twice and call me stupid.
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Postby Zeus » Wed Oct 20, 2004 10:50 pm

Stubble wrote:Sorry Zeus, I remember reading some time back that you had some issues with the Primer. No big deal, that was a friendly razz. And if I'm mistaken, well slap me twice and call me stupid.


no worries man... i THINK its chris D that mentioned he had some issues with the primer... but then again i could be wrong too :D

RedCelicaTRD wrote:I guess I just have more faith in the stock headgasket then the rest of you.
Im gonna see if it will hold as much boost as i can throw at it :)

if anything i would be more worried about the head studs streaching under high boost... but i havent heard of that being a real problem either
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Postby d1alltrac » Thu Oct 21, 2004 7:03 pm

wow...i didnt think the stock HG could handle that (22psi) was that just for a brief moment here and there or was that consistent?

just to be safe i would go with either an HKS or a cometic MHG and ARP studs. i went with the cometic cause it was so much cheaper and ive heard great things from the Supra community about cometic gaskets.
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Postby d1alltrac » Thu Oct 21, 2004 7:06 pm

BTW...kinda off topic but an 800rwhp 2jz 4runner? that is BADASS, i wish i could do a project like that, ive been wanting to do an old-school tacoma with a 3s or something like that
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Postby SuperRunner » Thu Oct 21, 2004 7:15 pm

I was going to start on it this year, but I got married instead. But, I will probably start sometime next year. It kinda has been started, but it got put way back on the burner, with the burner on very, very low.
1993 Supra - sold
1993 GS300 900rwhp
1993 Lexus SC400 - supercharged
1991 MR2
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Postby SLC Punk » Fri Oct 22, 2004 10:36 am

Hey SuperRunner, I know you from Yotatech!
When did you get an ST 165?
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Postby SuperRunner » Fri Oct 22, 2004 2:19 pm

just last week.

I traded an N/A 87 supra for it. I will take a pic this afternoon
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1993 GS300 900rwhp
1993 Lexus SC400 - supercharged
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