fastsohc

I am building a f23a1 for boost in my 99 accord 5 speed. I was wondering how much HP can this block support???I am running factory compression billit rods forged pistons hp springs and retainers studs so far.... I havent decide if I will replace the crank. I am striveing for +400. Is this just a dream????

any ideas?

fw190bvi

F block is iron, and is grenade proof. 400 whp on a built F series means around 25ish psi, but with good solid internals, its not unachievable. im not too sure about the strength of the F series crank, and no one seems to have anything to say on the subject.

your biggest concerns will probably be fuel management and teh drivetrain. f axles will last you 5 minutes w/ 400+ hp....they were only designed for around 150 hp, and will be stressed with more power. the tranny istelf should be good to that level of power, but id consider a rebuild/beffing it up........

whats your fuel management plan?? injector size?? turbo size??

secksiman19

400hp+fwd=???
i must admit....it is pretty cool to lug it in third at 15mph, stomp on it, and just let teh tires squeal. my biggest concern would be fuel management. but then again dont know much about f23s

carolinaACCORD

the f series engines (not sure about F20C tho) have a cast crank. That equals: shitty. I would definitely have a custom forged or billet crankshaft made. That will run you into the poorhouse though.

Another option would be to swap out cranks with an h22a, but that means you'd need to change the rods and pistons as well. Although that wouldn't be a bad thing, because you could change the r/s ratio and maybe devise something that will allow you to make some more power in the upper rpm range.

I would just have the stock crank shotpeened and cryogenically treated to make it a little stronger.

v4lu3s

is the h23a1 crank cast or forged?

Nick H

it's a cast crank....

well, i really hope that you don't plan to make this thing a daily driver...it will just end up being to expensive to maintain and not reliable enough....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carolinaACCORD &raquo;</TD></TR><TR><TD CLASS="quote">Another option would be to swap out cranks with an h22a, but that means you'd need to change the rods and pistons as well.</TD></TR></TABLE>

there's not much of a point in doing this to a f/i car...also, you wouldn't necessarily have to change out the pistons...you could use the h22 crank and rods with the f23 pistons (aftermarket) to have a 2.1x liter motor that can rev higher...

the f23 crank will actually yield better results in my opinion...from my research, engines with longer strokes get quicker turbo spool times and also end up with much more tourque than do motors with shorter strokes (check out some of the 4g64 eclipse guys who turbocharge their motors and end up with 268 ft/lbs @ 6 psi)....


the idea about shot peening your original crank is probably the best idea for your setup...

fastsohc

So if I shot peen the crank I still need axels right? could I use prelude axels without major mods? And how can I beef up a honda 5 speed???

v4lu3s

why would you want to use prelude axles? they are not the right length for your car.

Nick H

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v4lu3s &raquo;</TD></TR><TR><TD CLASS="quote">why would you want to use prelude axles? they are not the right length for your car.</TD></TR></TABLE>

yeah they will work, and the splines are stronger, but still not strong enough...

get in touch with the driveshaft shop (www.driveshaftshop.com) and get some of their beefy axles...
http://www.driveshaftshop.com/item135641.ctlg

jweller

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fw190bvi &raquo;</TD></TR><TR><TD CLASS="quote">F block is iron, and is grenade proof. </TD></TR></TABLE>

I think you mean the sleeves are iron

v4lu3s

the splines are exactly the same as accord axles....the only diff is the length.
the halfshaft is different and can handle more power based on its design though.

Accord6Gen

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v4lu3s &raquo;</TD></TR><TR><TD CLASS="quote">the idea about shot peening your original crank is probably the best idea for your setup...
.</TD></TR></TABLE>

what does that mean

carolinaACCORD

shot peening is a process where either tiny metal beads, ceramic beads, or glass beads (called glass-shot peening) are blasted at the metal object to make it stronger.

the way this works is the small beads actually make tiny, uniform "dimples" in the object. This "dimple making" compresses the metal, making it structurally stronger.

fastsohc

thanks alot. Axels look tuff w/warranty..I better start saving though.

can't find anyone to shot peen a crank. Not much around here anyway.
Dose anyone no a really good machine shop around NC???

carolinaACCORD

http://www.hondaraceengines.com

Thats the website for RLZ Engineering in Concord. Ask for Brad Z. and let him know what you wanna do. I'm not too sure if they do shotpeening, but he'd be able to tell you what's best to do or a place that could do it.

fastsohc

I tried RLZ engineering and all I get is the homepage. Do you have another way to reach them???

carolinaACCORD

you might be able to get him on AIM. ill im you his username.

v4lu3s

i am wodnering why the Fseries has a forged crnak when cars like th honda fit have a forged crank with its tiny 1.3 liter engine.
all K series cranks are forged as well.
i also know that the J series gets forged cranks.
it seems crazy that mos hondas get a forged crankshaft but the F series doesnt....specailyl since th F series cranks cost as much as the H22 ones....that and a guy that has been working in honda salvage and parts for most of his life was shocked to hear that there was a chance that honda accord cranks were not forged, when he had thought all honda crnks were forged steel.

Ivrit

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carolinaACCORD &raquo;</TD></TR><TR><TD CLASS="quote">the f series engines (not sure about F20C tho) have a cast crank. That equals: shitty. I would definitely have a custom forged or billet crankshaft made. That will run you into the poorhouse though.

Another option would be to swap out cranks with an h22a, but that means you'd need to change the rods and pistons as well. Although that wouldn't be a bad thing, because you could change the r/s ratio and maybe devise something that will allow you to make some more power in the upper rpm range.

I would just have the stock crank shotpeened and cryogenically treated to make it a little stronger.</TD></TR></TABLE>

Call Adams Automotive in Crestview Florida. They have a bone stock F22 putting out a little over 300 WHP. It has Hondata, with DSM injectors.

El Chiva

i really dnt wanna get crazy and put turbo in my engine i wanna leave it like that> but i wanna make it a little faster what parts can i change to get it a little faster???? for example like headers, intake, etc......

hondamark35

I can't say for sure that other F-series do or don't have cast cranks (i was under the impression that honda didn't use cast cranks, only cast rods) but I can confirm that the F23A1 has a forged crank.