[AquaticHarpy]

Recently I purchased a wrx, really loved the car, owned it for about 6 months before I purchased a gtx2967r turbo to help out as stock the car was falling off around 4500. I put it on forester xt suspension and reinstalled the stock intake.
The gtx2967r took around a year, I custom welded a 1.75" catless uppipe, as well as a 4" downpipe which is currently not connected to the rest of the exhaust but will be soon. I've been tuning myself and so far it's going well. I upgraded the alternator ,750cc fuel injectors, a new fuel pump along with the turbo, additionally an afr guage, oil psi guage, and oil temperature guage were installed.

Beside these mods I plan on porting the heads, getting Outfront Motorsports closed deck cnc package as well as fire lock gaskets I plan on purchasing new eagle forged rods, along with a v9 ej207 crank, fresh 9.5:1 JE Pistons, stage 3 280/280° crower cams, GSC Beehive springs, titanium retainers, 1mm oversize valves, New stdx king main and rod bearings, solid engine mounts as well as a complete gasket kit from subaru. The timing and water pump are somewhat fresh currently and I'm considering welding a set of equal length headers. Along with the current mods and what's listed above, what else will I need for the overhaul to safely make roughly 350 crank hp, as well as the ability to redline around 8500, I hope its not too much to ask but since I have her running with the new turbo the pull to 7k is invigorating. I'm looking for a mild mannered beast below 4k and the chance to really let her sing another 4k past that Cheers!

 

[XJman]

High rpm and daily street driving are usually not compatible. An engine that's going to crank out 350hp at 8000rpm is probably going to have little to no torque at any reasonable rpm range.

Then you'll have the problem with the transmission and diff gearing being nowhere close to appropriate for that engine speed and the car will never feel fast or fun to drive.

It's like driving an rx8. Sure it just revs and revs, but the car has no guts and it's miserable to drive unless you are on it.

8500rpm you will need a short stroke and some mighty valve springs.

 

[zax]

I don't see any mention of an oil pump upgrade.

That will be necessary for keeping oil pressure sufficient while spinning above 7500rpm.

I agree - this is an awfully expensive way to make a relatively low amount of horsepower. There are cheaper and easier ways to generate more horsepower on a forced induction motor - boost and other VE improvements.

 

[AquaticHarpy]

High rpm and daily street driving are usually not compatible. An engine that's going to crank out 350hp at 8000rpm is probably going to have little to no torque at any reasonable rpm range.

Then you'll have the problem with the transmission and diff gearing being nowhere close to appropriate for that engine speed and the car will never feel fast or fun to drive.

It's like driving an rx8. Sure it just revs and revs, but the car has no guts and it's miserable to drive unless you are on it.

8500rpm you will need a short stroke and some mighty valve springs.

Ej207 is the shortest stroke crank I can find without buying a new shortblock. The springs I chose are good to 9500rpm,

I owned an rx8 for 2 years and it was the most fun car I've ever had, I intend to make 350hp around 5500-6k to be honest, and see how much more I can tune from the rest of the revs

I'd like to cruise around like standard, it doesn't need to be fast for daily driving but I want the ability to stomp the gas when safe to do so and have the seat push into my back.
I'll look into an upgraded oil pump and oiling mods, the ej207 crank is good stock to 8250!

 

[AquaticHarpy]

I don't see any mention of an oil pump upgrade.

That will be necessary for keeping oil pressure sufficient while spinning above 7500rpm.

I agree - this is an awfully expensive way to make a relatively low amount of horsepower. There are cheaper and easier ways to generate more horsepower on a forced induction motor - boost and other VE improvements.

Fast, cheap, or reliable. If I have a fire ringed block, bigger valves, no cats, and the ability to push up to 470hp of boost, I don't see what's wring with spending a little extra to have my revs and the ability to turn up the boost when I please without worrying

 

[XJman]

Fast, cheap, or reliable. If I have a fire ringed block, bigger valves, no cats, and the ability to push up to 470hp of boost, I don't see what's wring with spending a little extra to have my revs and the ability to turn up the boost when I please without worrying

Ej207 is the shortest stroke crank I can find without buying a new shortblock. The springs I chose are good to 9500rpm,

I owned an rx8 for 2 years and it was the most fun car I've ever had, I intend to make 350hp around 5500-6k to be honest, and see how much more I can tune from the rest of the revs

I'd like to cruise around like standard, it doesn't need to be fast for daily driving but I want the ability to stomp the gas when safe to do so and have the seat push into my back.
I'll look into an upgraded oil pump and oiling mods, the ej207 crank is good stock to 8250!

I'm sorry you had to own an rx8. At least you're better now.

Honestly, maybe it is. Just because someone did it once doesn't mean it's going to work all the time. The only place I know that did some high rpm ej stuff is turn in concepts in Cincinnati. You may want to send them an email.

 

[AquaticHarpy]

I'm sorry you had to own an rx8. At least you're better now.

Honestly, maybe it is. Just because someone did it once doesn't mean it's going to work all the time. The only place I know that did some high rpm ej stuff is turn in concepts in Cincinnati. You may want to send them an email.

I'll send them an email, buying a v9 ej207 crank I'm hoping will allow for at least 8500, being forged and higher redline from stock. I'll start ordering parts soon

 

[zax]

OEM crank is forged...

The only advantage of the EJ207 crank is that it is cross drilled from factory... which requires more oil flow, hence the need for the uprated oil pump.

 

[AquaticHarpy]

OEM crank is forged...

The only advantage of the EJ207 crank is that it is cross drilled from factory... which requires more oil flow, hence the need for the uprated oil pump.

Currently I have an 11mm shimmed oil pump in place, I heard 12mm had issues at greater rpms. And yes all new ej207s come from the factory with a forged crank and massive redline.

If I need more flow what would you reccomend?

 

[zax]

The EJ205 comes from the factory with a forged crank - that was my point.