99 accord 4 cylinder ex,
I'm looking to add some very mild modifications mainly in the engine department, to try to get some more hp or torque i'm not too picky either way, but i was wondering if there was anything besides superchargers and turbos, also what will mess with my ECU? thanks in advance. it is a daily driver and i'd like to drop it down into the 13's anything you've got would be greatly appreciated . i don't think a new cam is where i want to go right now either, would i see a pick up from an aftermarket intake manifold? ideas with a price range would be nice, or links would work,

 

Getting your accord into the 13's will require more than simple bolt ons to your 135bhp SOHC F23. There is very little SOHC support. A lot of bolt on stuff like IMs and exhaust manifolds will need to be custom. Sorry.

If you Swapped over a JDM DOHC F22B then you could get a lot more power (rated at 160bhp) without changing hardly anything for about $500-700 if you can do most of the labor yourself. Then you can use parts for the H23A1 cams, headers, rods, etc.. Otherwise you are pretty limited.

Even the F22A nonVTEC engines have more support than the F23.

Pirate

 

ouch, not what i wanted to hear, thanks for the reply though...

 

If you are still interested you can check out http://www.cb7tuner.com they have the most engine modifications for SOHCs I have seen.

Pirate

 

if i were to do an engine swap, would there be a different tranny that i would be able to toss in there, mine is getting ready to bit the dust and i hear it is a common problem... thanks for the webiste by the way

 

Any H or F-series transmission will work as long as it is not the Prelude SH one that uses ATTS. You might consider a factory LSD version i fyou want to drag race. It would give you better ratios and better traction. Just a thought.

Pirate

 

Speedude, I hear exactly where you're coming from. I'd like to get my F23a4 in the 13-14's also but it would be difficult, you'd have to have every possible bolt on and internal accessory possible to get our car's with our stock engines to that point. There is an individual on here who used to have a 6th gen accord with I/H/E, stage 1 or 2 clutch I believe, a JET ECU, and some other small stuff. He ran 15.2 on 17's which is pretty impressive.....

 

thanks guys i guess i'm goin to have to start rethinking if i want to do anything to this car i guess...

 

*F22B DOHC headswap with cams* You're half way there already. C'mon torque is your friend. lol

 

sorry this may be a stupid question, but i can just do a headswap? as in the heads will fit onto my block? what would the engine management issues be with this swap? alright thanks in advance

 

Yes, it takes a little work but you can put any F-series head on your block (see link in my signature) and you can also put H23 and H22 heads on your block. Just remember that your F23 block was not meant to rev to 8000 rpm. Build the block then I would consider the H22 head swap.

If you go to the Prelude forum and look in the FAQ sticky there's a few links to F/H hybrid motors. If you replicated my engine (though I would not recommend it) it would get your 3000 pound car into the 13's with good tires and good launch skills.

Depending on how/if you build the engine the easiest tuning options are available with an OBD2->OBD1 conversion to run software such as Crome. If you keep similar displacement and a stock head swap then you can try to use the factory OBD1 or OBD2 ECU that best matches your hybrid. For example, if you swap an H23 head onto your F23 block then it is essentially an H23A1 and you can run it with the stock size H23 injectors and the P14 ecu. If you swap an H22 head on your built F23 block and you keep the stock H-series cams, 345cc/m injectors and header then you can run a P13/P5M ecu. If you build it particularly far from a stock configuration and want to stay OBD2 then you need to ask someone else about tuning options.

Keep in mind that usually these head swaps are less than ideal since your compression will either stay at 9.3:1 or drop to 8:1 due to the dome volume of the F23 pistons and the cylinder head ccs. A swap to higher compression pistons will show the benefits of the particular head swap.

Depending on your budget and skills It might be easier to buy a JDM F22B DOHC longlblock and swap out the stock pistons with some forged high compression 86mm ones than accumulating the parts to swap the head alone. Patience and research will get you the times you want with a reliable engine.

Pirate

 

whew, that sounds like a bunch of downtime, hmm, all sounds interesting, but nothing like that could happen until AT LEAST next summer... as far as skills as far as the true mechanics involved i can do it, but i don't know anything about electronics, i'd have to accumulate some serious equpiment to pull the block also. If i did a head swap, would i be able to talk to someone about swapping cams and lowering the power range? thanks for the patience man

 

... bump?

 

Cams are easy. If you stay SOHC you can get Delta Regrinds in advertised duration of 262Ëš, 272Ëš, and 282Ëš and they might even offer some VTEC SOHC cam grinds now.

Tuning is the tricky part. If you go OBD1 then it is easier otherwise it is more difficult.

Cams and compression are your friend unless you go Forced Induction.

From the sound of it you are a ways away from doing any serious modification. Of couse the cheapest hp/$ is nitrous. That is pretty simple and there are a lot of people that can help you there. That would be able to get you into the 13's with good gearbox/tires wihtout pulling the engine or swappng the head. It boils down to a matter of risk and preference.

Pirate

 

nitrous really isn't my thing, and forced induction would be a long way away, regrinds are small possibity, but not entirely out of the question. i understand what you're saying about goin OBD1 that may end up happening... we'll see thanks for all your help