ECUtune forged pistons for NA SVXii

[SVXRide]

Originally Posted by TomsSVX

My lands gave way under heavy doses of detonation on 12psi... none of us have had issues with the 9psi setup. If you are gonna run big N20 meaning 100 shot or more I would say go with the better pistons but 10psi max is good for the stock pistons... the rods may be another story but don't you have Sti rods you are installing?

Tom

yep, STi rods. I agree that the stock pistons should be good up to ~8psi based on OT's experience to date, I just want to have a little more insurance for those occasional "hard hits"

So, when is your engine going to be finished, now that you're teaching?

-Bill

[TomsSVX]

Originally Posted by SVXRide

yep, STi rods. I agree that the stock pistons should be good up to ~8psi based on OT's experience to date, I just want to have a little more insurance for those occasional "hard hits"

So, when is your engine going to be finished, now that you're teaching?

-Bill

picking up the heads and the block tomorrow along with some new plastigauge for the rods... assembly this weekend if all is well with the crank... Install next weekend... thats why I may/ may not miss the Jersey Shore Meet.

Tom

[longassname]

I think it's half and half on sicksubies lower boost. The better flowing cams certainly let him flow more air with less manifold pressure + he probably has a small air leak. His afr's still are leaner than I saw on my car but then I have the walboro and that could play into it to.

Anyway, I agree bill should use the pistons for forced induction for forced induction or the pistons for na for na--none of that stradling the fence stuff.

Originally Posted by TomsSVX

Then keep the stock bottom end and just do the heads... These pistons are meant for an N/A build and will only be a restriction on boost if placed into a FI motor. I meant we are flowing ssssooooo many more CFM's with the lower compression pistons... with the 9psi pulley sicksubie is seeing 6.5-7psi at WOT. It could be an air leak but his AFR's are telling me otherwise

Tom

[longassname]

The rings will be the same as the factory rings...litterally. CP isn't the supplier for the NA pistons. The supplier for my NA pistons gets the rings from the same Japanese vendor that subaru does.

I believe I did specify tool steel pins.

Weight? Well we don't know that until they are made. They will be lighter and better ballanced.

The design of the oiling and rings will be more like the forced induction pistons I got made before not like the factory design.

I did it right with the forced induction pistons, right? I imagine I'll do it right with the NA pistons.

Originally Posted by SVXRide

Michael,
Can you be a little more specific regarding what $800 buys? Tool steel wrist pins? How much lighter than stock? Good up to 20-30 psi (okay, so some of us might just stray into the pressurized arena in the future)? Type of compression and oil control rings?
Thanks.
-Bill

[longassname]

So...Bill add you to the list? Anybody else want in? I'm thinking of going ahead and putting a batch in.

Originally Posted by longassname

Ok, I know there are more but I couldn't find them so guys that I missed please add yourself and repost.

Headcount to date:
Nickfu S.
EarthWorm

[SVXRide]

Originally Posted by longassname

So...Bill add you to the list? Anybody else want in? I'm thinking of going ahead and putting a batch in.

Michael,
Replied to your PM.
-Bill

[GreenMarine]

Maybe in a few years... I think the engine will be due for a rebuild around 150,000 miles, and about another year and a bit is probably when that is gonna happen...

~ Chris

[longassname]

I'm going ahead and putting in a batch.
The more the merrier....
Feel free to add yourself to the list...

Headcount to date:
Nickfu S.
EarthWorm
Longassname
SVXride

[Roo]

Originally Posted by longassname

I'm going ahead and putting in a batch.
The more the merrier....
Feel free to add yourself to the list...

Headcount to date:
Nickfu S.
EarthWorm
Longassname
SVXride

Depending on time frame for $$ and delivery of said parts, I'd be interested. Just starting a new job at a local Subaru dealership, and getting a major increase in pay.

I've just gotten a project '92 SVX and have all sorts of questions, and have a project budget in mind of ~10k in the next 18 months to spend on building the car for Open Road Racing.

Any and all help that I can get would be awesome, as I'm not well versed in SVX, or at least as much as I am in Forester information.

[longassname]

about $800 and i'm putting the batch in this week. Add you to the head count?

Originally Posted by Roo

Depending on time frame for $$ and delivery of said parts, I'd be interested. Just starting a new job at a local Subaru dealership, and getting a major increase in pay.

I've just gotten a project '92 SVX and have all sorts of questions, and have a project budget in mind of ~10k in the next 18 months to spend on building the car for Open Road Racing.

Any and all help that I can get would be awesome, as I'm not well versed in SVX, or at least as much as I am in Forester information.

[longassname]

the fu is out, so...

EarthWorm
Longassname

[NikFu S.]

This is turning out to be a pretty hard winter. When my income picks back up I can be in again.

[longassname]

we should be able to get them then as well so no worries.

The number of people we get in now just determines the price for both now and then.

Originally Posted by NikFu S.

This is turning out to be a pretty hard winter. When my income picks back up I can be in again.

[GreenMarine]

Originally Posted by longassname

we should be able to get them then as well so no worries.

The number of people we get in now just determines the price for both now and then.

I'll be in for "then" too

~ Chris

[longassname]

I put the order into engineering today