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Old 09-01-2020, 01:04 PM   #1
splitoris
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Default Choosing the right motor max 350whp 08 Wrx?

Need a new shortblock for my 08 wrx.
Will stay under 350whp. Going to be getting tuned by phatbotti.
Do I go with a type ra shortblock?
Outfront grocery getter? Out front isnít to far away?
Or order a IAG for the peace of mind of having a lil warranty?

I will be adding supporting mods and only power upgrade will be sending my vf52 to get a 16g billet where upgrade.
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Old 09-01-2020, 02:10 PM   #2
BlackFighter
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Depending how much money you want to spend to have a peace of mind. What i have read/heard is that the RA block should be ok for 320-350 hp, but im sure you'll want more as soon as you feel that extra power and will want more. Its like crack.

Love IAG stuff but have seen a few of IAG motors with some issues being on sale in the classifieds and people starting to complain about IAG. Also to get that IAG warranty, a IAG certified shop has to do the install. So not sure whats going on with the quality checks during the assembly of their blocks. Outfront are good too.

I went with RalliSpec owned by Dave who has been building custom gearboxs and motors for over 20 years. Price is fair and his knowledge is grant. The engs are built to order so they don't have pre-built SB coming of a assembly line like IAG has started. Not saying that's always a bad thing, but things start to get missed when the block that is being built doesn't have a owners name attached to it.
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Old 09-01-2020, 02:32 PM   #3
splitoris
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Originally Posted by BlackFighter View Post
Depending how much money you want to spend to have a peace of mind. What i have read/heard is that the RA block should be ok for 320-350 hp, but im sure you'll want more as soon as you feel that extra power and will want more. Its like crack.

Love IAG stuff but have seen a few of IAG motors with some issues being on sale in the classifieds and people starting to complain about IAG. Also to get that IAG warranty, a IAG certified shop has to do the install. So not sure whats going on with the quality checks during the assembly of their blocks. Outfront are good too.

I went with RalliSpec owned by Dave who has been building custom gearboxs and motors for over 20 years. Price is fair and his knowledge is grant. The engs are built to order so they don't have pre-built SB coming of a assembly line like IAG has started. Not saying that's always a bad thing, but things start to get missed when the block that is being built doesn't have a owners name attached to it.
Ya but Iím limited by stock tranny so thatís why I said no more than 350whp I mean I would love 400-500.. I also noticed a turninconcepts stage 1 on flatirons but itís 99.55 pistons which mean what kind of clearance is that?
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Old 09-01-2020, 03:25 PM   #4
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Iím just wondering thoughts about being over 300 but under 350 warrant getting a staged block? Like I said I will be using a reputable tuner phatbotti
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Old 09-01-2020, 03:50 PM   #5
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Originally Posted by splitoris View Post
Ya but Iím limited by stock tranny so thatís why I said no more than 350whp I mean I would love 400-500.. I also noticed a turninconcepts stage 1 on flatirons but itís 99.55 pistons which mean what kind of clearance is that?
The TiC stage 1 block is pretty much just like all the other stage 1 blocks in that it is drop in pistons on a stock bore.

For a power goal of 350 you can very easily do this with a factory EJ255 short block, BUT I will very strongly encourage you to pull the pistons, and open the ring gaps a little bit more than what they come with.

This will be the fastest, easiest and cheapest solution to what you need.
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Old 09-01-2020, 04:05 PM   #6
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Then at that point just get a stock SB from the dealer and drop in some forged pistons and send it. Not sure if the 08 WRX is a 2.0 or a 2.5 but keep in mind if you have 2.0 it will be a pain to hybrid the 2.5 SB with 2.0 heads.
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Old 09-01-2020, 04:06 PM   #7
splitoris
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The TiC stage 1 block is pretty much just like all the other stage 1 blocks in that it is drop in pistons on a stock bore.

For a power goal of 350 you can very easily do this with a factory EJ255 short block, BUT I will very strongly encourage you to pull the pistons, and open the ring gaps a little bit more than what they come with.

This will be the fastest, easiest and cheapest solution to what you need.
Say I went with a stage 1 block with drop in pistons isnít their a risk of lower life with have too much ptw clearance?
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Old 09-01-2020, 04:29 PM   #8
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Then at that point just get a stock SB from the dealer and drop in some forged pistons and send it. Not sure if the 08 WRX is a 2.0 or a 2.5 but keep in mind if you have 2.0 it will be a pain to hybrid the 2.5 SB with 2.0 heads.
I just want to buy a shortblock and have the shop drop it in
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Old 09-01-2020, 04:42 PM   #9
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get a ra block
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Old 09-01-2020, 04:52 PM   #10
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Ya just get a RA block like gc8 said. But if you want forged pistons, which i would recommend, just have the shop put them in and install the block. Cheap insurance while everything is apart.
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Old 09-01-2020, 10:33 PM   #11
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Iím honestly thinking of just ponying up and going with stage 2 tuff or the rallispec with 4032...
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Old 09-01-2020, 11:39 PM   #12
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they seem tobe able to get 400 out of the stock RA block some are getting more. but yeah If i didnt have to get the forged pistons I wouldnt.. most forged pistons blocks dont hold up for too long, like 70,000 ishsome more but that is about the average. Forged pistions at 350 arent really going to do much for you BTW Dont get forged pistions just because
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Old 09-02-2020, 09:27 AM   #13
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they seem tobe able to get 400 out of the stock RA block some are getting more. but yeah If i didnt have to get the forged pistons I wouldnt.. most forged pistons blocks dont hold up for too long, like 70,000 ishsome more but that is about the average. Forged pistions at 350 arent really going to do much for you BTW Dont get forged pistions just because
Thatís why Iím leaning more towards a rallispec with 4032 which can run a super tight clearance
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Old 09-02-2020, 09:35 AM   #14
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Quote:
Originally Posted by splitoris View Post
Ya but Iím limited by stock tranny so thatís why I said no more than 350whp I mean I would love 400-500.. I also noticed a turninconcepts stage 1 on flatirons but itís 99.55 pistons which mean what kind of clearance is that?
Just FYI, stock transmission on the 08+ isn't the same as 02-07. They can hold power pretty well. Essentially (but not quite exactly) JDM STI 5 speed gears...
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Old 09-02-2020, 11:33 AM   #15
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Quote:
Originally Posted by splitoris View Post
Say I went with a stage 1 block with drop in pistons isnít their a risk of lower life with have too much ptw clearance?

we and others have been doing that setup for years and it does not seem to be an issue, and is a good low budget solution.

Now, that's not to say that it's infallible, and I will agree that doing a 99.75 piston with a bore and hone with set PWC is much nicer. At the same time it does take it out of people's budget.
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Old 09-02-2020, 11:57 AM   #16
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we and others have been doing that setup for years and it does not seem to be an issue, and is a good low budget solution.

Now, that's not to say that it's infallible, and I will agree that doing a 99.75 piston with a bore and hone with set PWC is much nicer. At the same time it does take it out of people's budget.
Ya well Iím upping my budget for the peace of mind. I keep second guessing myself on what to do... Iím leaning more towards the rallispec block with the 4032 RCM pistons... but you donít get a warranty like iag
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Old 09-02-2020, 11:58 AM   #17
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Just FYI, stock transmission on the 08+ isn't the same as 02-07. They can hold power pretty well. Essentially (but not quite exactly) JDM STI 5 speed gears...
Up to around 400tq?
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Old 09-03-2020, 03:25 PM   #18
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4032 pistons with tight clearances should last longer than iag 2618 with tight clearances right?
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Old 09-05-2020, 01:50 PM   #19
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4032 pistons with tight clearances should last longer than iag 2618 with tight clearances right?
That depends. 4032 is a great material. It's a touch stronger than 2618, and expands less than 2618, but the downfall is it's more brittle than 2618 which means that it's not as tolerant to big knock events.

2618 is very popular due to balance of cost, strength, weight, and toughness against things like detonation.
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Old 09-05-2020, 04:24 PM   #20
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That depends. 4032 is a great material. It's a touch stronger than 2618, and expands less than 2618, but the downfall is it's more brittle than 2618 which means that it's not as tolerant to big knock events.

2618 is very popular due to balance of cost, strength, weight, and toughness against things like detonation.
Ya but I want longevity. So with going e85, staying around 350whp, and getting tuned by phatbotti. 4032 should be superior
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Old 09-11-2020, 10:44 AM   #21
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Manley drop in pistons are made for factory bores... the factory PTW is VERY tight, so there should not be more slop than intended on the drop in PTW assuming you use A pistons in A bore, and B in B bore and you use a brand new block.

That is the budget build I keep going back to is $1830 stock shortblock + MAnley drop in pistons. Does anyone else make drop in pistons? I know JE does for IAG, but they didn't seem to want to sell to individuals.

If you are using E85 and 350-400whp, you should be fine with just a regular stock RA shortblock.
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Old 09-11-2020, 11:29 AM   #22
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Manley drop in pistons are made for factory bores... the factory PTW is VERY tight, so there should not be more slop than intended on the drop in PTW assuming you use A pistons in A bore, and B in B bore and you use a brand new block.

That is the budget build I keep going back to is $1830 stock shortblock + MAnley drop in pistons. Does anyone else make drop in pistons? I know JE does for IAG, but they didn't seem to want to sell to individuals.

If you are using E85 and 350-400whp, you should be fine with just a regular stock RA shortblock.
Talking to a few tuners RA is fine in those ranges especially if using e85
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Old 09-11-2020, 11:43 AM   #23
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Post Rallispec

Is rallispec a good company to buy from looking for a new block and heads
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Old 09-11-2020, 01:10 PM   #24
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Is rallispec a good company to buy from looking for a new block and heads
Everything Iíve read yes great company.
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Old 09-11-2020, 01:51 PM   #25
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RalliSpec has been around for 20 years and way more in experience. It is not a shop that over markets because they don't need to, the shop is doing fine without advertisement. That tells you something. Dave is the solo owner now and has been building rally cars for years with great results. The block will be made custom to you, not some SB that was assembled a year ago that was just sitting there waiting to be sold. Everyone there are grown adults without that "Bro" mentality, very professional. They are also one of the best shops for gear boxes. Thats what they were known for in the Rally world.
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