Question on internals

[talvai]

I plan on doing a Green or 20G turbo and hoping to get around 350-400awhp.(give or take a little). My question is on the internals.

1.What is the max the internals can take?
2.If I do need to upgrade, what is top the list to change first?
3.Will upgrading the internals help reliability of the engine?
4.Upgrading internals improve power output?
5.If I do decide to do internals, should I just upgrade the rest, since the block is open?

any other info you could give me would be great. Thanks

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[cellgeek101]

If you read the the countless threads here, you will see that it depends on the tune and how you drive. There have been reports of people that have had vehicle with stock internals pushing over 400whp for thousands of miles. Another factor is what dyno you are using to measure this power. What are you currently putting down. Usually asking your tuner that will be tuning your car what to expect from his experience is your best bet.

BTW, since your in the Hartford area, I would recommend going to XX tuning. They do awesome work there!

[IMPORTIMAGE]

1. up to 550whp we've seen. safely? between 400-450whp countless times. could it fail? yes. (on sti's) on the 2.5wrx could be 350-400whp max you might not want to go more.
2. pistons/rings...connecting rods/bearings would be good too
3. yes
4. no, but you can push the car harder so in turn that would make more power
5. if you have the $ to do the valvetrain...do it!

ps if your doing a built motor atleast get something gt30 sized so you can take advantage of higher boost. fp green is a decent turbo. the 20g + built motor is more then overkill i'd prefer a larger turbo if it was with a built motor so you can put that motor to work

[3XRex]

I run my 20g with a built motor, yes, it's overkill.

P.S. I sleep with a night light too.

I will eventually go rotated 30r as was suggested. You, however, have a WRX, so put gears on your list of build ups if going larger then a green.

Or you can do what I did, drive it until it breaks.

Simple mod if you want some assurance would be drop in forged pistons (carefull, most are overbore spec). 2816 alloy minimum. Call it a day and strap on that 20g. If the motor is out, you obviously will save money on labor by upgrading other internals, but a set of drop ins on a 20g isn't bad either.

[sts2689]

Ya my motor was open so I went ahead and just did Wiseco Pistons, Cosworth rod and main bearings and cometic hg

[talvai]

Well looks like I might be doing some internal work. What do you guys recommend for brand name? I know it might be overkill for a 20g, but I want to have some power while keeping the car very reliable and make it last. I don't like reach the maxinum of something and abusing it.

Yea I know tranny needs to be upgrade, next summer I will be putting in some PPG gears to hold the power.

I know xx tuning is near me, but I don't trust them because they just installed my friends clutch on his evo and 6k miles later it broke, now xx tuning is blaming fidanza and neither of them will help him out.

Anything else you guys got for me? Or any links for some good reading?

[Clark_Kent]

If you don't have extensive knowledge I wouldn't suggest peiceing together a block. Buy a preassembled shortblock from the best in the business.

Ron @ RAWPerformance (formerly known as Axxis Racing so search both)
AMR
Element Tuning (I'm unsure if ET is mass producing shortblocks but give them a call)
Crawford Performance
Andrewtech Automotive

I'm sure I might be missing one or two others but there you have it.

[talvai]

Well if I don't need to do everything I won't. Just thought that if am upgrading pistons and rods, mean as well do cams, valves and springs too maybe. But I won't be doing all this myself, I plan on having a pro shop that is very experinced do it, but I was planning on getting some basic info so I can see how much everything would cost about.

[neversummer489]

What abou the stock rods, if the pistons are upgraded how
much can the rods hold?

Sorry for bringing this back from the dead

[06-wrx-tr]

Plan on spending minimum on dropins 2k. When I spoke to ron about one of his short blocks he said plan on spending 6k the block itself I is $2600+machining heads+gaskets+labor =6k +/- a few$

[neversummer489]

K.... I was wondering about the max accepted rate of the stock sti rods

[bcblues]

I'd do the oil pump (upgrade) and water pump while you are at it. And any time my engine comes out, I always freshen the clutch (clutch plate minimum).

[neversummer489]

That doesn't answer my question I'm asking at what hp do I need to be worrying about the rods

[mick_the_ginge]

Originally Posted by neversummer489

K.... I was wondering about the max accepted rate of the stock sti rods

They are good to about 500 WHP.

[RaceSleeves]

Originally Posted by talvai

Well if I don't need to do everything I won't. Just thought that if am upgrading pistons and rods, mean as well do cams, valves and springs too maybe. But I won't be doing all this myself, I plan on having a pro shop that is very experinced do it, but I was planning on getting some basic info so I can see how much everything would cost about.

We always recommend doing a 'freshen up' to the heads while you have the motor apart. At this time, the shop can check to make sure that all of the head components are in good condition, i.e. springs, valves, etc.