Subaru Frankenmotor

[jakelee]

Hi all:
I'm in California. I have a 2.2L and would like to do the Frankenmotor conversion. So I found a 2.5L motor with 50k miles on it.

Will I need a new small car engine mount for the 2.5L? Just want to confirm before I order it. Thanks all.

[DLJ]

Its plug and play. Use the motor mount you have. I would just go with the 2.5

[jakelee]

Cool. Thanks!

Would love to go with the full 2.5, but it's illegal in California.

[[email protected]]

Following. Let us know how it goes. I think there are specific year combinations that you are looking for. You might want to update yours heads to non hydraulic for example.

[jakelee]

Non-hydraulic heads??? Ok, I'll check it out.

[bobbyblack]

From what I've read, the '99 25D has the phase 2 case (the crank journals are bigger) and squared dish piston tops. There are specific Cometic head gaskets that will dial your compression in to optimum for what you are looking at. Using stock 2.2 heads, the previously Dual-Overhead cam to your newly built engine that is again non-interference!!! Its my ambition too. Just waiting for my chance

http://www.ultimatesubaru.org/forum/topic/141903-cometic-frankenmotor-gasket/
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'87 Westy 'Flossie','86 Westy 'R1','86 tintop GL - Subi2.2 'J2','83.5 stock tintop L 'ZoomBus','74 Karmann Ghia, '63 Notch

[tristessa]

I don't understand why people make such a huge deal out of the non-interference aspect.

Maintain your shit and use genuine Subaru timing components and it'll never be an issue.

[bobbyblack]

I think that question is easily explained by the following:

Shit Happens

You don't know if the belt you bought new is actually going to go as far as the test batch indicated at the manufacturer's lab. You might have confidence, but do you have an easily replaced belt if it breaks on a non-interference engine, or do you have a minimum of two head jobs and however many new valves to replace the bent/broken ones? Maybe a good hole in a piston would do for you, too then?

Just wondering why anyone thought up an interference design, seems more like a ploy to get more sales. You don't really know what you are getting, anyway. I'd like to interject that where these things are designed, it really doesn't matter, since nobody keeps a car anywhere near 80K miles. Costs too much to keep old cars there. Mind-set in clear view on this issue. Car manufacturers do the following: make cars to sell. Hint hint.
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'87 Westy 'Flossie','86 Westy 'R1','86 tintop GL - Subi2.2 'J2','83.5 stock tintop L 'ZoomBus','74 Karmann Ghia, '63 Notch

[[email protected]]

Yes I think after 97 they went to manual adjustment for the valves. Better efficiency.

[tristessa]

[lucianosanchez]

2.5L is legal in California? I thought only 2.2 was?
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1983.5 Aussan Brown Westfalia | 2016 to 2020
1983.5 Beige Westfalia | 2019 to Current

[rubbachicken]

AFAIK only 2.2 in legal here, although there are area's in cali that don't require smog, if you are lucky enough to live in one, then you could stick an audi v8 in the back

[tristessa]

[bobbyblack]

[Wildthings]

Wonder what the difference in transmission life is as you go from a 2.2 Subi to a 2.5?

I have owned VW's for more than 40 years and have had plenty enough transmission failures from broken parts and failing bearings with stock or nearly stock engines. I can't imagine upping the torque by 50% and expecting the box to stay together anywhere near as long.

[bajaleo]

[Jake de Villiers]

[chompy]

[bobbyblack]

[bbaythav]

Frankenmotor experts,

I found a 2015 2.5L suby with 20k miles on it. I have a 1997 2.2L suby now. Will this 2015 2.5L block work for this Frankenmotor setup or will I need an older 2.5 block?

Thanks!