Alright guys here we go. So I currently have a 97 prelude with h23a stock long block turbo in my car I’m going to list the parts below because they will play a role in my next build

fuel side and tuning

skunk 2 intake manifold
aem rail and fpr
blox 750cc injectors
walbro 255 pump
aem wideband
s300

turbo stuff
obx tubular stainless log
precision 5831 turbo
2.5” piping
ebay intercooler
Tial 38 mm wastegate 9.7psi spring
2.5” downpipe

drivetrain
m2s4 trans with quaife lsd
lightweight flywheel (forget the brand)
competition 6 puck sprung clutch
insane shaft 500hp axles
205/55/16 bfg drag radials on stock wheels.
innovate traction bar
innovate mounts

ok so all those parts are on my current setup, at my disposal is a g22 with fully built bottom end and traum 10.5:1 pistons, head has super tech valve springs and retainers. I also have a clutch masters 725 super single clutch for it and tubular top mount manifold.

im looking to lay down 400 horse roughly and probably get a dyno tune. I’m wondering if I could just put that g22 in and dress it with my current setup parts and achieve that with no issues. I know that obviously the better flowing manifold I have would be ideal but that will require new wastegate and fabrications. I’m hoping to just max my current injectors out even if I need race gas or something. I’m wondering how much boost I’ll be able to safely run with the 10.5:1 pistons . This will be a drag car only. Also open to Suspension ideas for making it stick to the track.

Id love some ideas. Thanks guys

 

I don't think you will have enough fuel injector/pump for 400 whp on E85. I would want to use a knock-resistant fuel with the 10.5:1 pistons, but with a good tune these pistons will not be limiting you.

If 400 is your goal, I would do a Walbro 450 or 525 and upgrade to injectors to Bosch EV14 injectors somewhere in the 1300+ cc/min range.

 

For 400whp on E85, you can do fine with 1000cc EV14 style injectors as long as you have the tuning software to support the dead times of the injectors.

 

I was considering doing maybe race gas like c16. E85 is hard to get out here I live in Maine

 

What is a g22? I haven’t heard of that before. Do you mean H22? Am I missing something here- a g22 that has a fully built bottom end…

 

I think it's an F22 bottom end with an H22 head.

 

Yes f22 bottom and h22 top

 

If you're doing 400whp with C16, you don't even need 1000cc , you can do that with 600cc in an older school Bosch/Rochester Lucas injector... But it will be a low impedence injector, so resistors or driver will be needed.

 

That's pushing it my friend... if 600cc injectors will reach 400 whp, they will be MAXXED out on a return type fuel system... it is probably better to use a set of 750's or 1000's so that you have some duty cycle left unused for good measure.

 

There's really no drawbacks either to going with a 1000cc Bosch injector anymore either, even if they're a little oversized for the power goals. MPG is barely affected, and I've never had issues getting a car to idle on 1000cc. Only time I'd use a sub-1000cc injector these days is if I was 100% sure the car would never go forced induction of any type.

 

I cannot disagree... I only suggested a smaller size IF you don't plan on going any higher in your power demands AND you need to save a few bucks since 1000's usually cost $40 to $100 per set more than the next size down from most of the current quality injector providers. The important part of my statement is that one should have fuel injectors sized so that at peak power, the injector duty cycle is reaching a maximum of 70-80%... so that any ECT and IAT fuel corrections CAN truly work... otherwise, your engine may go "boom boom".

 

Yeah yeah yeah, I know I need to upgrade to bigger injectors, lol.

 

Would a 1600 or 2200 cc be too big? I just think my power goals will keep increasing…. I dont want to keep buying new sets. Is there draw back to way overshooting ?

 

I'll clarify.. 660cc Low impedence with driver can do that without any issue. I'm still currently on older schoole Siemen Deka Injectors (880cc) with a simple box at over 600whp with less than 60% duty cycle. And that's the old school like you and I used to deal with.
With today's tech, it can be done with slightly lower than 1000cc. I never understood going with too large just because you can.

But I do see your point of view.

 

I’m going to try e85 and 2200 cc injectors and the tubular too mount 3” exhaust. Anyone care to chime in on how much power I should be able to get at roughly 20psi?

 

My guess is 330-360whp with that sized turbo. I think it will take more like 25psi to put down your goal of 400.

 

You'll get a bit more out of that at 20psi running C16. Your bottlenecks will be 1) your intercooler will be horribly inefficient to where the pressure drop will cause you to increase boost just to keep up, and 2) the 2.5" pipe on a top mount? (really, in this day & age?) I'm not saying that you MUST get a Garrett core to do this, but an eBay intercooler is just asking for overheating and inefficiency. Please don't say you're going to use the top mount to show the turbo off. You'll kill all the spool characteristics you're asking for.

plenty of decent intercoolers out there to do the job over JDMSPORT. And yeah....it actually Does matter. see the sticky at the top on "Let's talk intercoolers". specifically page 3

You'll pop that engine in no time with the intercooler alone.