boosted F20B dohc vtec.

[deevergote]

Cast aluminum... they won't last any longer than any other internals. Same material.

[93accordexcoupe]

is This Car Still Going? I Just Want To See How Long Stock Internals Last In F20b?

X2

[deevergote]

Stock internals will last as long as any stock internals will in an F or H series engine... which is not very long.

[bigpoppa694lyfe]

The car is actually still running strong. Ryan got rid of it for a built ls/vtec crx with 62mm turbo cranking out 600hp. Between Ryan and the kid who has the hatch now... There's been a good many trips down the strip and alot of rips on the street. Im with Mike though... It is a ticking time bomb but as of right now its still running strong.

[fstacrd]

The car is actually still running strong. Ryan got rid of it for a built ls/vtec crx with 62mm turbo cranking out 600hp. Between Ryan and the kid who has the hatch now... There's been a good many trips down the strip and alot of rips on the street. Im with Mike though... It is a ticking time bomb but as of right now its still running strong.

is it still stock internals or did any of you put forged internals?

[deevergote]

I'm assuming that it has stock internals. It wouldn't be a ticking time bomb otherwise!

Some people get lucky with stock internals for a while. Some people don't. evil_demon_01 rebuilt his engine with brand new internals, and he broke a ring land in 6 months. He's not one to halfass or do things incorrectly, either.

Boosting on stock internals is fine, as long as you know to expect a broken ring land eventually. If it's just a toy/project that you don't mind breaking and rebuilding, then there's nothing wrong with it. If it's a primary vehicle that will be a serious problem if it no longer works, then boosting on stock internals is stupid.
All F and H internals are made of the same material. None will be stronger than any other. Stock F22A internals are probably the "safest", given the low compression ratio. At least you run less of a risk of doing damage due to detonation.

[bigpoppa694lyfe]

Still stock internals. The kid who has it now doesn't know the first thing about building cars so he just buys everybody else's cars. He used to daily drive it 20 miles each way up 2 mountains before he got a new job closer to home. Being stuffed into an EG hatch... The f20b does great moving it around so it rarely see's any boost. That's the big reason it's lasted this long

[deevergote]

That's a big factor as well. Little turbos that will spool to significant boost under 3000rpm will probably cause more damage, since regular driving will often be in boost. If you can drive the car out of boost when you don't need it (and when you want to save gas), it should last longer... assuming all other parts and the tune are good.

[TheProfessional]

F20B on boost as my daily as well, 412whp on stock internals, 3 years running and still goin. No smoke, no ticking, no CEL's no issues.

[jdm92_accorn]

Tuning, fuels, crankcase pressure evacuation and service intervals on top of geographic location are what plays a huge part in how the engine lasts. I'd rather make a little less power than expected to be able to enjoy in longer. I see boosted type-r motors go a long time here and I live at sea level. Those are 11:1 motors on 10-16psi most of the time and they aren't as well built as the F20B for bottom end stress.

[toycar]

What interests me the most about the f20b is people tend to break it the least, and replacing one would'nt cost much more than a set of forged rods/pistons.


So, why not just boost it stock? Just saying, its food for thought. Sure, it'll explode.


Build it with forged goods, and other shit still breaks all the time and spending money is part of the process. Maybe part of that is that people don't play with the f20b as often as other engines get modified, but, you don't find a hole lot of information out there on people destroying their f20b. Sure, there are threads and such, but it does seem like people are getting a decent shelf life out of these motors on boost.

[HappyGilmore]

My question is does this hold true for it's sister engine the F20A DOHC? Being that they are exactly the same the only difference is that the F20A is Non-VTEC. This has my curiosity.

[deevergote]

I have no hard evidence, but aside from the bore and stroke being the same, something tells me the F20A and F20B are not identical in terms of the bottom end.

The F20B is newer than most of the engines people attempt to boost in these cars, therefore there is a greater chance of survival. 20 year old engines have a good deal more wear on them than 10 year old engines... especially since those 10 year old engines were probably pulled from cars with lower mileage.
The internals are still fragile cast aluminum. They will still break.

[toycar]

I have no hard evidence, but aside from the bore and stroke being the same, something tells me the F20A and F20B are not identical in terms of the bottom end.

The F20B is newer than most of the engines people attempt to boost in these cars, therefore there is a greater chance of survival. 20 year old engines have a good deal more wear on them than 10 year old engines... especially since those 10 year old engines were probably pulled from cars with lower mileage.
The internals are still fragile cast aluminum. They will still break.

I really 100% agree with this.



F20b's for $600-$800 are pretty common, so, yeah. Compare that to machine work, rods and pistons, and you are spending about the same money either way. Sure, forged goods won't break but thats not some assurance that you're not going to break other shit all day long.


You have to pay to play, and so, why not? Comparing costs anyways, especially for a novice that cannot build a rotational assembly themselves. You could spend a few hundo on measuring tools alone if you don't have them already.



And for whatever reason, the f20b does seem to have less active shit about blowing up and more people claiming to have success with it + boost. I would'nt advocate for it perse, but, I do think its worth considering if you cannot build an engine when you get right down to dollars and sense.

[honda2014]

F20B on boost as my daily as well, 412whp on stock internals, 3 years running and still goin. No smoke, no ticking, no CEL's no issues.

Whoa.. If this claim is true, the F20B deserves more credit than it is given.. How many miles do you have on it?