My set up:

Block:
B18C1
Bored to 81.5 mm
ACL race bearing kit
stock gsr crank
ARP main studs and head studs
CTR high compression pistons
Type r water pump and oil pump
Cometic bottom end rebuild kit
Cometic head gasket
10AN block breather lines

Head:
PR3-3
Supertech valvetrain
m22x rocket motorsport cams
​​​​​​ AEM adjustable cam gears
Edelbrock VictorX intake
Skunk2 68mm Throttle body
AEM fuel rail
RDX injectors
OEM dizzy with Ngk wires and spark plugs
Gates timing belt
10AN valve cover breather lines

Other:
2.5 inch yonaka exhaust
chipped P28
will run on e85
walbro 255 high flow fuel pump
OBD 1

Can I run a turbo on this setup and if so how much psi and what size turbo should I get? The sleeves or stock. Will a block guard do me good? How much power can this setup handle, and how high can I rev this? I also don’t know the compression ratio but im
guessing I’m at low 13s or high 12s. Before rebuilding this engine I made 210 whp N/A on the dyno. Got I tuned at kaizen speed with 92 pump gas.


My car:







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To be honest I would be a little weary about going turbo since the room for error is very small since your using a stock rod and piston. If you had forged pistons and some good rods I would not think twice after changing over to a better software. It’s a very nice setup you have but it was built for a single purpose , this is just my take .....others may differ. Love the car though, nicely done!

 

^^ This.. The engine was originally built for N/A. You've got a good base though. Swap out pistons and rods and send it.

 

Nice EG Si Hatch.

Your cams and pistons would not respond well at ALL to forced induction. Cast high compression pistons + turbo is a guarantee to crack a piston or melt something. Get a set of forged H beam rods, some forged pistons in the 10.0 -> 11.0 compression range, and some CTR/ITR or Tuner 1 cams with appropriate valve springs and you're good to go.

 

I have a fixed budget for my rebuild right now. I can’t afford forged pistons, that’s why I want to keep the same setup. I would hate to tear up this engine again later down the road to replace the pistons, to able to run a turbo.

 

okay so going turbo with this setup is a no go. I can’t afford forged pistons. What else can I upgrade to bump of my power.

 

Any idea of how much compression I have with this setup?

 

Thanks for the compliments guys!!

so now that the turbo is out of the question. Is there any room for improvement to increase my power? I have a 4-1 pml 2.5 inch header. I’ll be running e85.

 

i don’t want to be that guy.... it’s just not my personality, but if you can’t afford the pistons, you probably should not attempt the rest. It’s not cheap to do things right and reliable, not without a ton of maintenance and problems anyway...... trust me I know. Save your money and enjoy the beautiful car you have, and if you can’t save the money at once, just buy one part at a time. I think you would be limited to 4-8psi which would be strong if you could ever get it tuned. The problem is with high compression everything gets amplified when your talking tight tolerance in tuning. There are too many variables with fuel (especially e85) to keep a safe tune IMO

 

Okay the turbo is out the question. Is there any room for improvement to increase power?

 

other than maybe going with a less aggressive intake manifold, the one you have was designed for turbo applications and I’ve seen a power loss when used on N/A setups. I like N/A but they are very limited and when you get bored with the power you have.... well .... it is what it is

 

I agree 100% with this. Just don't want to see OP back himself into a corner financially an potentially "ruin" the nice car he's already got.

Only thing I'd really consider for bumping your power maybe a few WHP is a SMSP style exhaust manifold and a 3" exhaust. Otherwise, start saving and ferreting away money for the turbo build, once you have more saved up you can re visit this topic.