simple question about boost

[kllrdesire]

ok, basically, i'm looking for a low PSI (6-9) turbo for a 95 accord. i'm looking into the t3/t4 set up but would like to hear some ideas or opinions on set ups. alos, do i need internal work (ie rods, sleeves, pistons) if i boost at these levels? i plan on doing valves/springs, injectors, and camshafts already, and a larger fuel pump. will this be enough to stand the pressure and get me 270+ HP? btw, i did search before asking, nothing doin' for results.

[00accord44]

Well I think you should be fine without internal work on 6 or 7 psi provided you upgrade your injectors, pump, and exhaust. But I can also tell you that you'll be making nowhere near 270 hp either. 6-8psi on your car should get you to about 180ish depending on tuning and that's generous. If you wanna get to the high 200's you'll need mucho mas boost, in the 14psi area .

[kllrdesire]

ok, then will i be able to maintain safe power levels without anymore work besides tuning?

[00accord44]

Yeah. Low boost on the stock engine should be fine as long as everything is done the right way.

Here's a thread you should probably read as you prepare to step into the world of FI: Boost "How To" Guide

Good Luck

[kllrdesire]

misunderstanding here: i meant the could or couldn't take 14psi worth of boost? i've heard honda engines are notorious for the thin cylinder walls, so should i look in deck plating, etc if i'm looking for 270hp?

[00accord44]

Oh. For 14psi you definitely need some work. Definitely sleeves, rods, pistons etc. The f22 wasn't built to handle boost. How much boost and how soon will dictate exactly how much work you'll need done

[kllrdesire]

figures, would a H22 prelude engine make this power without as much boost? and how hard is this possible engine swap? i've heard of it but only rarely.

[00accord44]

Well the H22 puts you up to 195 or 200 (depending on which year) right out the gates. But if you want to go above 9 psi you're still gonna need to at least sleeve the engine if you want it to last long enough for you to enjoy your new turbo. The f22/h22 swap is pretty much a direct fit. Mounts are all the same, I don't believe ecu needs to move either. Its a comon swap for 4th and 5th gen accords for those reasons. Its a little more complicated with 6th gens cuz the mounts are different.

But back to the point, reaching the high 200's will be alot easier if you do the h22 swap first, which I reccomend of you have the money.

[kllrdesire]

ok, then let me ask a hard one: how difficult would it be to transplant an F20 engine? and has this even ever been done to an accord?

[00accord44]

Ahh, the F20c. Same series. Smaller size leaves more space for goodies in the engine bay. Two problems though.

1) The mounting points are different (it sits sideways)

2) F20 is configured to RWD and unless I'm mistaken, there are no other honda trannies that will bolt up to the f20

But has it been done? Of course. It takes some $$ and custom work, but anything is possible under the sun. If I had the money, I'd definitely have an F20c powering my accord. Then again, if I had alot of money, I'd just buy an s2k and have it altered so I can fit (6'5" > s2k)

edit: if researching this f20 into accord project, don't be fooled into thinking the f20B and F20C are the same thing. B comes from JDM Accord SiR. C is USDM S2000

[kllrdesire]

i was wondering about the RWD set up. the driveline would be too short to do a complete drive train swap too...o well, it was worth a thought. ok, so what would u recommmend for a turbo set at about 8 PSI and good response?

[00accord44]

Well the amount of response is gonna be based on the combination of tuning and turbo size. If you only plan on boosting up to about 10psi, you can stay with a small turbo and tune it to maximize power at low rpm. You'd lose some top end punch but end up with a flatter powerband. Some people enjoy the sudden rush of a turbo spooling up at 5000rpm, but the power is more useful earlier imo. But if you wanna eventually move on to more boost (to reach that 250+ hp range) you'll need a larger turbo which will of course take longer to spool but you'll have more power for the top end. That becomes the challenge when you get FI. Spool speed vs top end power.

The boost how to guide I linked earlier goes into good detail about how to manage that balance. If you really do want to get your output up to 275ish hp then I highly reccommend you invest in an H22. With the amount of time and effort you'd use to get your SOHC to that level, you could have made a larger initial investment with the H22 to give you a head start and spend about the same amount of money in the end.

[kllrdesire]

ok, so how does an H22 engine swap with 270ish degree cams, valve springs and valves, fuel pump and rails sound with a T4 turbo mildly tuned?

[00accord44]

The specs on cam setup and timing are beyond my field of knowledge. Every engine is different so you'd have to ask somebody with tuning experience that could actually look at your engine. As far as your housing selection, if you're looking at a T04 trim you're either gonna need a lot more reinforcement for your head and bottom end on an H22 -or- you're gonna have a turbo way too large for your needs that takes till forever to spool. I wouldn't reccomend a T04 unless you plan on boosting into the teens from jump, which would of course require more than just lifter mods. Sleeving would become ABSOLUTELY necessary on the H22 block with the thin walls, lower compression pistons, head work, forged rods to start. In addition of course to the fuel pump and rail, injectors, exhaust, etc.

If you meant a hybrid T3/4 then your proposed setup should be adequate. I noticed you left off injectors, those you definitely want to upgrade (which would only make sense with the fuel rail). Again, the cam timing will differ on every engine, so that I can't tell you.

[jeffcoslacker]

Just run 22psi on a stock motor...it'll be the most fun 9 seconds of your life...post video of the bottom end scattering across the track on Streetfire so we can all enjoy it....