cruz1383

lol guys you need to tune your cars i get 30 mpg with a 2000 prelude f20b and its on hondata s300 i also got 200WHP with it on an older dynojet that is preset so no fake HP on this thing. plus i just paid $4.50 in cali

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00 prelude f20b 200 whp stock..... dynojet dyno

Shimee

Right on the money with driving habits, but automatics don't benefit from this (if you stay out of sport shift) so much.

But no engine is the same. Over time valve lash changes, filters get clogged, fuel pumps start ageing, EGR ports get filled with crap, etc. None of this is a big factor, I'd say maybe a quarter.

Did you swap in a F20 into your Prelude for some reason? Why? Turbo?

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bouckarooo

the autos technically shoudl eb getting less mileage as they have more drivetrain losses, so therefore less power. Although due to constant rev shifting that parasitic loss may be negligable.

nvroutgund

I do drive a manual, and I agree that in theory automatics should be worse... However I've noticed (because I own an SS auto AND an SH) that the automatics actually seem to be a little more efficient because they have taller gears and don't rev as high. And admittedly, I do drive a little more aggressively in my SH because it being a 5 spd, more fun blah blah. But the gears are noticeably shorter in my SH and it revs up much faster. I suspect that has something to do with it as well. But most likely driving habits ^_^

cruz1383

its a much better engine then the h22 in every sense of the word. it come with dual valve springs( only other engine that has that is the type R integra motor) stock the rods are thicker and a lot stronger then the H22 and they come with arp 2000 LIKE bolts which was never put in any other honda engine that i know of. the Rod/stroke ratio is the second best in the honda engines that we use (4 bangers) second only to the B16 as far as D B H and F series engines i think its even better then the K on Rod/stroke ratio also but i dont know for sure. the engine cost $900 shipped and it also has type S cams stock. so it is a far better engine then the H22 but here are some pros on the H22 it has .2 liters more in displacement and 6 ft pounds of torque more stock. ( mine is tuned though and it has more HP then stock H22) and i beat stock tuned preludes all day then they look at my engine and see i have .2 liters less its good.
i also get better gas milage then h22s i almost for got that..

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00 prelude f20b 200 whp stock..... dynojet dyno

bouckarooo

The reasont eh bore/stroke is better is it is more "square" thatn teh h22. The idea is that you want the bore and the stroek to be as equal as possible(one reasont eh b16b revs so high is becuse it has a square ratio) to the bore. The h22's and h23's have long stroke, and small bore incomparison. They make good torque down low and hp up high but due to lack of "square" ratio they are prone to failures especially when knock occurs. All in all the h22 would have been better had it come with iron sleeves and perhaps a bigger bore. Now if you want to look at an engine that produces then check out the new tomie engine, it is 2.0 liter with a square ratio and produce 270 hp and 230 lbs of torque, mind you it is built for f3 racing but none the less is good example of how to build a proper 2.0+l displacment engine in N/A form.

cruz1383

i understand all of that and also you just cant go and buy that engine (tomie)like you can an f20b.. but all in all the f20b is an overall better engine by far then the H22 it make more power then the h22 stock to stock. it also has a longer power band and it has iron sleeves stock. the torque on the h22 is not that much from the f20b anyway. 6 -9ft pounds isn't something to right rave reviews about. lol i dont feel the difference when daily driving around but i do feel the power of the f20b when on the throttle compared to the stock h22.

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00 prelude f20b 200 whp stock..... dynojet dyno

KraserK

Stock H22a > Stock F20b enough said. You put money into any engine it will always be faster than a stock counterpart. I am talking JDM here too. No blue top F20b has beaten me.

cruz1383

lol too bad we are countries apart.. but everyone is entitled to their own opinion. i have raced jdm h22 and they dont beat me on the dyno or street. the most any jdm h22 put out on the dyno was 194whp(stock block) and he had cams stage one skunk 2s. i have S cams. same dyno same tuner. and my reflection in the beginning was that the motor is a better platform overall then the h22 it was built for racing in mind. i mean what h22 has spring lost motions like the K series and bigger rods then any H22, dual valve springs stock, arp style rod bolts. not even the type S H22 has that. plus this thing revs to 9K( and still making power) with ti retainers do that to your H and you'll be picking up a new one in a week if not sooner.

i like the H but it just not the great motor that it could of been.

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00 prelude f20b 200 whp stock..... dynojet dyno