turbo on 10.5:1

[19dabeast85]

i see well with some head work and a msd, intake manifold. I would think 250hp on a stock compression turbo moter is possible. you could almost do it n/a but i could be wrong. sounds right, up your fuel preasure id add a second fuel pump between your fuel filter and fuel rails,add a new fuel rail, bigger injectors, intake, manifold, cam, port and polish, bigger valves, lightend crank pully,lightend cam gear, turbo kit, run it at 10 psi i think you wouldnt have to up your compression you could maybe go even an little lower compression and still hit 250hp. Just dont forget the aluminum radiator and some heat shield wrap for your turbo kit. Id even go with a intercooler, but ive never liked loseing my moter. It isnt cheap if i can do a build without blowing up my moter, id go that route then blow a good moter.so try not to up your compression thats what id do.

There is no need for a second fuel pump or a "high-flow" fuel rail, throw a replacement Walbro 255lph pump in the tank and be done with it. The stock fuel rail flows just fine.

The F22 cylinder head flows very well and a port/polish is probably not needed to reach 250whp. The valve size definitely does NOT need to be increased to reach the goal.

Forget about a lightened crank pulley and instead pull off the balance shaft belt. It's free and will gain you at least as much whp as a light pulley.

I "lightened" cam gear isn't really necessary but make sure you get an adjustable one such as what Bisimoto offers.


And back on topic:

If it were my personal build and my goal was 250whp for a dependable daily driver, I'd stick to a lower compression ratio. No more than 9.5:1. I would probably go with 9.0:1 myself.

[joe_bernardi]

Does any one know about how much it cost for custom pistons from bisimoto?

[19dabeast85]

Does any one know about how much it cost for custom pistons from bisimoto?

I'm not sure, cheack his website, probably not the cheapest route for sure. Bisi has the most R&D behind his products than any other brands out there along with the absolute best quality, BUT for 250whp, you may be better off going with a different brand forged pistons.

[d112crzy]

You guys do know that bisi only designs the pistons, then outsources to someone piston manufacturer to make em...so quality is just as good as that manufacturer is.

I wouldn't waste money on pistons for anything under 300whp(FI).

[joe_bernardi]

What other brands are there that make 9:1 - 9.5:1?

[d112crzy]

Every brand can make whatever you want. It'll run you around $600 or so for custom spec pistons though.

[WiKKeDV16]

U guys are really not giving the f22a block credit..

400whp is capable..so why isn't 250whp capable as reliable..even on 91 octane?

My suggestion?

Make the head breathe

Bisi cam
Gutted IM
70mm tb
3" ic piping
3" inlet/outlet fmic
Holset hx35
Shorty ram manifold
3"dp/exhaust

And believe me even on a stock f22a..u will surpass 250whp..

[rexload]

just look at chessboxers setup, 250whp can easily be done on a DSM 16G setup around 10 psi, no need to build the engine for that goal

[d112crzy]

U guys are really not giving the f22a block credit..

400whp is capable..so why isn't 250whp capable as reliable..even on 91 octane?

My suggestion?

Make the head breathe

Bisi cam
Gutted IM
70mm tb
3" ic piping
3" inlet/outlet fmic
Holset hx35
Shorty ram manifold
3"dp/exhaust

And believe me even on a stock f22a..u will surpass 250whp..

We've told him he doesn't need them and it's not worth it. He doesn't seem to get it. Let him be.

[SPLCB7]

i beleve the stock compression on the 2.2 is 9.5but that could be wrong...i couldnt find it in my book and my tester is at my bros or id run out and check mine to be shure i think thats right though.

[d112crzy]

8.8

[ar design]

I hate octane booster. Hardly works and it fucks up spark plugs.

Not the good stuff, like Klotz.

when you run a turbo you usually want to run lower compresson 8.5 or 8. you might gain more hp with higher compression but youll gernade your moter in a short time. if you want to go higher compression id go supercharger over turbo. lower your compression and up your boost itll last longer

That is super old-school. I wouldnt go any lower than 9:1. Anything lower just kills your off-boost response, and doesnt really serve any purpose. If you cant tune a 9:1 motor safely with boost, you need to find another hobby. And there is zero logic in a supercharger being better for higher compression.

9.5 and even 10:1 would be fine if you have access to 93oct and are only running 8-15psi with a good tune. If you want to run a ton of boost, IE 20+, I would reccomend running w/m. You can get it to work just fine without, but you will be 1 bad tank of gas away from going BOOM, even with a good tune. Pump gas is not so consisent :*(. Another great option for high compression motors is E85.... Just finished up the fuel system in my C6 Corvette to handle E85 (two Bosch 044 pumps, 2L surge tank, 96lb injectors.... and two GT30R turbos

[d112crzy]

E85 isn't consitent either

Also...anywhere around the 8-9:1 compression is fine. You'll see maybe 10whp difference in 1 point in compression in the same setup.

[ar design]

E85 isn't consitent either

Also...anywhere around the 8-9:1 compression is fine. You'll see maybe 10whp difference in 1 point in compression in the same setup.

Consistency isnt the idea. E85 burns far cooler and has a much higher octane rating (105) than pump gas. Way more headroom when you are tuning.

Anything below 9:1 is pretty pointless. Why would you run below that, especially on a low boost motor? My 2.1L hybrid/frankenstein VW stroker motor is setup at 10:1 and we are shooting for 900whp at 40+psi. Its all in the tune and knowing what youre doing

[d112crzy]

If that's the case, no reason to run forged slugs on such low boost period.

Also..e85 is inconsistent in their octane ratings. At the same pump, they'll change the mix up depending on the weather. This can be disastrous or very expensive if you're not your own tuner.

There's also no need to run high compression on most Honda's due to their VE. The boost response is still there with 8.0, even on a huge snail.

But I agree with you.