F22a1 vs F22b dohc

[Rhenderson]

Which one would be the better choice for a fully built turbo setup?

[Leung]

i'd go with the F22A1 for turbo because it has a lower compression ratio compared to the F22B DOHC.

[whitejdmcb7]

i thought the compression was the same

[Leung]

nope.

F22A1 is 8:8:1

while the

F22B is 9:0:1

http://www.cb7tuner.com/vbb/showthread.php?t=44639

[zigg_1311]

If your going to build a car for boost i would definitely go with the f22a1. With the money you could spend on the f22b, you could buy a really nice turbo setup for your f22a1 with all of the best parts. Plus the f22b will not have as much as aftermarket support, although a lot of parts are interchangeable. I just think that the f22a1 will be a much easier build with a lot less headaches.

[Chicano2005]

I THINK>>>>f22a1: Less compression, less power.
f22b: More compression, more power.

correct me if im wrong!

[Rhenderson]

yea now i need to find a junk car that has an f22a1 5spd.

[Leung]

I THINK>>>>f22a1: Less compression, less power.
f22b: More compression, more power.

correct me if im wrong!

from what i've read in other threads about making power, you want more compression if you're building an N/A engine while it's the opposite for a forced induction engine.

[Rhenderson]

yes higher compression is for n/a and low compression for forced induction.

[deevergote]

You can boost high compression motors... and 9:1 is hardly high. I have a motor built for turbo now, with "lower compression pistons"... 9.3:1. Higher compression reduces the margin of error. If you aren't careful, you'll blow it up. Otherwise, you could boost a car with 13.0:1 compression if you could control detonation.



Anyway, the F22A is a stout motor, and the head flows well. The F22B DOHC may have similar properties, but it's not as widely researched.

I'd go with the F22A, mainly because they're cheap to buy, replace, fix, and modify. They're fairly simple motors, but they get the job done very well.

[tn_accords]

as said above... F22A would be the choice for me...

[Chicano2005]

Oooops sorry for the wrong info there Rhenderson.

Beevergoat makes a really good point!!

[jdm92_accorn]

You can boost high compression motors... and 9:1 is hardly high. I have a motor built for turbo now, with "lower compression pistons"... 9.3:1. Higher compression reduces the margin of error. If you aren't careful, you'll blow it up. Otherwise, you could boost a car with 13.0:1 compression if you could control detonation.



Anyway, the F22A is a stout motor, and the head flows well. The F22B DOHC may have similar properties, but it's not as widely researched.

I'd go with the F22A, mainly because they're cheap to buy, replace, fix, and modify. They're fairly simple motors, but they get the job done very well.

this is very true, f22a's love boost witha proper tune. an f22a with a good bottom end(block and internals) can withstand up to 12psi if properly tuned and maintained. a good setup can be had cheap. a good intercooler could be had for around $200-$400, you can use 1 gen dsm injectors, a bisimoto stg 1.2 cam for $230, and a good manifold and t3/t4 for about $300-$500 a chipped ecu from MRX for $150-$200 and a custom exhaust for about $300-$400 and an h23 intake manifold can be had for around $40-$50. so about $1100-$1800 you can make good power. not to get your hopes up cause it all depends on quality of parts and the guy at the dyno where you get the car tuned but, i will say this, you should be able to make 250-325whp. i mean look at mine, i made almost 150whp and 140wtq and mine is n/a with 8.8:1 compression with some cheap bolt-ons, a cam and a tune.

[deevergote]

The chipped ECU alone won't cut it. You MUST get it tuned properly, or you will blow up your motor. A basemap is designed to get you to the tuner... not to rip around on the streets until you get around to tuning it. People make this mistake all too often. You must have your ECU tuned for YOUR setup. Even a tune from a similar setup won't be right.

[Rhenderson]

Im am planning on doing this build slow where it can be done right...im just looking for all the information i need to get started.