ShiftHappens01
Member
Hey guys. I'm looking to get my 04 WRX up to about 400-450 whp. What do you think is the best route to go to get there? Build the stock block or go Frankenstein?
2004 EJ205 build advice.
- Thread starter ShiftHappens01
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ShiftHappens01
Member
Blouche 20G? ID1000's?
If I spelled that right... Never remember but at least this is phonetic lol
If I spelled that right... Never remember but at least this is phonetic lol
HolyCrapItsFast
Drinks beer!
I would probably build the stock motor. The hybrid setup is not with out its problems so stick with the block and head combination as well as all the supporting mods. You would need to select the right turbo for this and big is not always best but bigger is a must for the power you are looking for. On the EJ25, you can get to that realm of power an relatively smaller turbos, but yours might require something like a GT3071 or similar.
Find a good machinist to do the engine work. The machining is the single most important thing to get right with these motors. Essentially if they are not matching pistons and torque plate bore and honing, they are not doing it right. The EJ20 is more forgiving about how much material you can take away from the piston walls so you don't really have to think about sleeving for the horse power you are suggesting.
Find a good machinist to do the engine work. The machining is the single most important thing to get right with these motors. Essentially if they are not matching pistons and torque plate bore and honing, they are not doing it right. The EJ20 is more forgiving about how much material you can take away from the piston walls so you don't really have to think about sleeving for the horse power you are suggesting.
ShiftHappens01
Member
So I need bigger than the 20G?
ShiftHappens01
Member
What size injectors do you think?
HolyCrapItsFast
Drinks beer!
Are you planning to use E85?
ShiftHappens01
Member
No e85. Looking to stay 93
ShiftHappens01
Member
E85 isn't readily available enough in my area. It's here but only a couple stations have it.
HolyCrapItsFast
Drinks beer!
then I would not go bigger than 850cc on gasoline. If you ever did plan on using e85, then 1000cc minimum would be prescribed.
ShiftHappens01
Member
Ok cool.
GT3071
850cc injectors
What about internals? Any specific brands and/or sizes?
GT3071
850cc injectors
What about internals? Any specific brands and/or sizes?
HolyCrapItsFast
Drinks beer!
I am very partial toward Wiseco pistons and Manlely rods. As far as size goes, you need to determine that at the time of build. The machinist needs determine how big the cylinders will be and then you can match the pistons to that.
You can probably do well with the "H" beam rods for the power you want. For much more than 500 I would suggest the TurboTuff series, but for you it is not necessary. Plus the "H" beam rods are lighter.
for the bearings I would go with stock or King or Clevite. ACL are over rated IMO and I have spun more of those than I can remember. Never had problems with the stock ones.
You can probably do well with the "H" beam rods for the power you want. For much more than 500 I would suggest the TurboTuff series, but for you it is not necessary. Plus the "H" beam rods are lighter.
for the bearings I would go with stock or King or Clevite. ACL are over rated IMO and I have spun more of those than I can remember. Never had problems with the stock ones.
ShiftHappens01
Member
Thanks for your input. I was told by another unnamed source that I could use the 20G lol. Now I just have to hunt down a good machine shop lol
HolyCrapItsFast
Drinks beer!
Yeah finding a good machine shop is most of the work right there.
I believe the 20G is good for 400whp on an EJ25, but that is a tall order on an EJ20. It probably can be done but how safe is it at that point. The GT30 will get you there and then some if you want it. If spool is a concern of yours, then you might even think about a GT28 or an FPgreen.
I believe the 20G is good for 400whp on an EJ25, but that is a tall order on an EJ20. It probably can be done but how safe is it at that point. The GT30 will get you there and then some if you want it. If spool is a concern of yours, then you might even think about a GT28 or an FPgreen.
ShiftHappens01
Member
Yea it would mostly be an autox and some road course and daily
ShiftHappens01
Member
What are your thoughts on the stroked kits?
HolyCrapItsFast
Drinks beer!
You mean like a 2.0 to 2.3? or a 2.5 to 2.7
ShiftHappens01
Member
Yea
HolyCrapItsFast
Drinks beer!
2.0 to 2.3 is a good upgrade but the 2.5 to 2.7 I am on the fence about. My favorite solution for the EJ25 is either leave it alone or destroke it, but for the EJ20 I prefer stroking. You might actually be spending more than you have to by stroking the motor because you can easily reach your goal on a standard motor. Plus the standard motor is easier to tune with well known parameters.
ShiftHappens01
Member
Ok. I didn't know if it would be worth the money. So I'll just pass on that. Lol.
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