i have a h22a4 with a rebuild i did to it, i needed to know what kinda compresion im running, and if its woth it to just change the block i have for one of these f23 blocks,
this is a list of what i have,
f23 lower crank, f23 rods
h22a type s pistons, 11:1:1 compresion
port polish, 3 angle valve job, ported intake manifold, i have good tourqe but i wanna turbo the car and i know i would have to sleeve a h22 to turbo it, i dont wanna push more than 8psi on it though, will the f23 block last with the turbo, and will it be more worth it, what should i do, considering all the parts i have, is there a combo you guys can think about that would help, and last and most important, i wanna know what my compression is at considering the rods i have and the pistons, i dought it is at 11:1:1, any opinions would be cool, thx

 

Type-S pistons = 87mm
F23 Clyinder = 86mm

good luck with that.

 

F23 bore is actually 86mm and despite the fact I overbored mine to 87mm for H22 pistons, I don't reccommend doing it especially for boost since the steel liner will be very thin.

Read page 1 of this thread and included links:
https://honda-tech.com/zerothread?id=1046336

You will have catastrophic failure if you do not hog out the H22 head or run a super thick head gasket to account for the taller H22 pistons. Also you will be running very high compression (over 12.x:1) with type s pistons.

also:
high compression + turbo = blown motor
long stroke + short rod + high revs = blown motor
Turbo + thin 87mm f23 sleeves = cracked bores

The F23 rods will not like anything over about 6700 rpm. They are thin and bearings will suffer the higher loads.

Pirate

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">F23 bore is actually 86mm and despite the fact I overbored mine to 87mm for H22 pistons, I don't reccommend doing it especially for boost since the steel liner will be very thin.

Read page 1 of this thread and included links:
https://honda-tech.com/zerothread?id=1046336

You will have catastrophic failure if you do not hog out the H22 head or run a super thick head gasket to account for the taller H22 pistons. Also you will be running very high compression (over 12.x:1) with type s pistons.

also:
high compression + turbo = blown motor
long stroke + short rod + high revs = blown motor
Turbo + thin 87mm f23 sleeves = cracked bores

The F23 rods will not like anything over about 6700 rpm. They are thin and bearings will suffer the higher loads.

Pirate</TD></TR></TABLE>

haha whoops...early this morning...87mm eh..you got *****!

anyway boring to 87 on an f23 plus type-s and turbo would be one kickass way to blow your engine into pieces

 

I think it would be better to take it to 110 MPH and cram it into first and let the clutch send the pistons though the hood. I would love video of that.

Pirate

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">F23 bore is actually 86mm and despite the fact I overbored mine to 87mm for H22 pistons, I don't reccommend doing it especially for boost since the steel liner will be very thin.

Read page 1 of this thread and included links:
https://honda-tech.com/zerothread?id=1046336

You will have catastrophic failure if you do not hog out the H22 head or run a super thick head gasket to account for the taller H22 pistons. Also you will be running very high compression (over 12.x:1) with type s pistons.

also:
high compression + turbo = blown motor
long stroke + short rod + high revs = blown motor
Turbo + thin 87mm f23 sleeves = cracked bores

The F23 rods will not like anything over about 6700 rpm. They are thin and bearings will suffer the higher loads.

Pirate</TD></TR></TABLE>

ill back that up, those f23 rods are like tooth picks, it will be interesting to see how sams motor takes the highe revs, becasue he said he is going to rev it to where it stops making power, which is scary

as far as your motor goes, maybe you could look into some rsx pistons, or custom 86mm b series pistons, and you can keep your motor at an 86 bore and slap the h22 head on..

idunno im f ing tired peace..

 

i know i cant use the type s pistons, but i do already have my old pistons, or i can buy low comp pistons, but i think i have to sleeve the car to put low comp, pistons on the h22,,,,
so what should i do, but col comp pistons in a f23 and use the advantage that it doesnt come with frm sleeves, or should i sleeve and piston my h22, considering i have already the crank of an f23 in it, with the rods, what to do? any ideas, and when im done with the set up, if anyone want to buy dc sport copy headers, and type s pistons, i will have them out of the car and for sale, let me know, ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtlmotorsport &raquo;</TD></TR><TR><TD CLASS="quote">i know i cant use the type s pistons, but i do already have my old pistons, or i can buy low comp pistons, but i think i have to sleeve the car to put low comp, pistons on the h22,,,,
so what should i do, but col comp pistons in a f23 and use the advantage that it doesnt come with frm sleeves, or should i sleeve and piston my h22, considering i have already the crank of an f23 in it, with the rods, what to do? any ideas, and when im done with the set up, if anyone want to buy dc sport copy headers, and type s pistons, i will have them out of the car and for sale, let me know, ?</TD></TR></TABLE>

h-pistons have weak ringlands...no matter which ones they are very likely to break under boost

 

if you are running the f23 crank in the hseries block...you will either run the f23 rods or a custom...you will not be running a h-series rod,unless you machine it down...but then you are right back where you started.

 

i am running f23 rods, but what compression am i at right now with the type s pistons, and what compression would i be at with the original pistons, considering the set up i have

 

Go get yourself an f22b1 or f22b2 and boost the **** out of that. Cheap, 8.8:1 compression stock, f22b1 still has VTEC head, and if you WANT you can mount an H22 head onto that block which still has iron sleaves. Why do you think the accord forums have so many turbo users?

 

IF you run f23 crank/rods in an H22 block with H22 Pistons and H22 head with stock OEM headgasket you will be around 11.7 compression but that physically won't work the pistons will hit the head. soo by the time that you get a thicker head gasket to have enough clearance you will be down to about 10.7:1CR or less

If you put the H22 head on the stock F23 block and look to turbo it then you will get about 8.8:1CR and can safely run about 8PSI assuming that you tune it.

And if you do put the H22 head on the stock 97mm crank/rods you can spin it to 7000 or more but DO NOT expect your bearings to last long.

I would sping to 6700 max for longevity's sake.

Pirate

 

Pirate gustimating how much do you think an otherwise totally stock f23/h22 NA will output to the wheels? Or give me a crank estimate I don't care, just your opinion is all I wish for. I haven't seen a dyno for one NA yet... or is that what your setup is?

 

a totally stock f23/h22 as in 8.x:1 Cr? Very disappointing numbers... You would be lucky to get 150-160 whp depending on what kind of bolts ons you are using...

 

Personally.... that's not very dissapointing... I drove a 94 accord ex w/a f22b1 for 2 years that made 145 hp at the crank...

 

i also have a accord 1990 with a f22a1, what if i sleeved my block (h22) and i put the pistons from the f22a1, what compresion would that put me at, and would the pistons fit or would i need to mod internals, (witch i do not want to do) because some one in the forum said f22 pistons are at 8:8:1cr, and buy the way, thx everyone for the help, and for those that will be intrested, im gonna dino my car and see what im running with my current internals, (with a bit of tunning of course), ill post the dino in two weeks, then im putting the turbo right after that, ill deside what set up and ill post the dino for that too, thx for all the help

 

dino? kekeke

I dont recommend using a F23 crank at all, if anything put h22a4 crank/rods in the f23 block and get custom pistons and then throw on the h22 head. Then you should be golden

 

why would i do that?

 

h22a4 crank/rods give you a good r/s ratio but then you have an iron block to put some custom pistons in since it seems like the deck height is different in the f23 block then the h22? the f23 crank is a horrible choice... im sure some people might chime in talking about side-load, piston dwell, r/s ratio etc... of how the f23 is crap especially for boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accord387 &raquo;</TD></TR><TR><TD CLASS="quote">h22a4 crank/rods give you a good r/s ratio but then you have an iron block to put some custom pistons in since it seems like the deck height is different in the f23 block then the h22? the f23 crank is a horrible choice... im sure some people might chime in talking about side-load, piston dwell, r/s ratio etc... of how the f23 is crap especially for boost.</TD></TR></TABLE>

so why is it exactly that the f series are crap for boost? i have seen many STOCK f series motors putting out amazing numbers for a stock single over head cam boosted motor.

if you put in 98+ h22 crank and rods then your droping to 2.1 liters because of the 90.7 storke that your going to from a 97.

perhaps you should look around at some of the motors that members are runing, piratemcfred has an f23 bottom end , making more trq than hp, 2point6 is also runing a 97mm storke reving to 8k+ though his is not a f23 crank i am just giving examples . also samIam is going to runing a f23 bottom end with an h22 head.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">i also have a accord 1990 with a f22a1, what if i sleeved my block (h22) and i put the pistons from the f22a1, what compresion would that put me at, and would the pistons fit or would i need to mod internals, (witch i do not want to do) because some one in the forum said f22 pistons are at 8:8:1cr, and buy the way, thx everyone for the help, and for those that will be intrested, im gonna dino my car and see what im running with my current internals, (with a bit of tunning of course), ill post the dino in two weeks, then im putting the turbo right after that, ill deside what set up and ill post the dino for that too, thx for all the help
</TD></TR></TABLE>

the f22 pistons are going to be only a slight bit stronger than the h22 pistons, and then other thing is that the f22 pistons are 85mm that would be stupid to sleeve your block to run stock 85mm bore pistons, if your going to spend the grand or so to have you block sleeved, then you sould just save the extra money and buy 87 or 88mm bore pistons at what ever compression ratio you want

 

samIam already overspun a h23 crank, so he goes bigger? dont understand that.
exactly 2point6 isnt running a f23 crank.
of course pirate is going to make more torque than the 90.7mm stroke, now under boost going to 8k i wouldnt want the f23 crank tahts my opinion

F series arnt crap for boost (i'm putting a f22 with a mild build for boost in my teggy), but when you want to push it further then the crank should go then yes it is crap imo.

I was just stating what i would do

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accord387 &raquo;</TD></TR><TR><TD CLASS="quote">samIam already overspun a h23 crank, so he goes bigger? dont understand that.
exactly 2point6 isnt running a f23 crank.
of course pirate is going to make more torque than the 90.7mm stroke, now under boost going to 8k i wouldnt want the f23 crank tahts my opinion

F series arnt crap for boost (i'm putting a f22 with a mild build for boost in my teggy), but when you want to push it further then the crank should go then yes it is crap imo.

I was just stating what i would do</TD></TR></TABLE>

sam spun a bearing on a h23 vtec, and everyone knows that the h23 is a bearing toasting machine. it has 50mm mains which it can not take the higher revs. that is where the f23 is going to shine, its got 55mm mains,

also take a look at the k20/k24 hybrids people are building and boosting then reving to 8k. the k24 has a 99mm stroke and they rev those very high without fault.

i was mearly bringing up the fact that 2point6 has a 97mm stroke crank because he revs his very high. i have talked to scott before and asked him if he was worried about reving his motor up to 8k with that large of a stroke, and he said that after he crunched the numbers it wasn't anythig that scarey compared to what people are doing with ls vtecs and crvtecs.

im my opinion (and your welcome to have your own too) having the f23 crank in a boosted motor isn't as risky as one owuld think. what i would be concerned about would be what transmission to use to match my rev range and peak power curve,

also i don't know where you got the idea of reving to 8k, where did that come from, i mean if it were me i porbably wouldn't rev that high at least not without replacing the stock f23 rods, but the fact of the matter is its all feasable

 

i thought sam spun a rod bearing (whooops, never read the thread)

whats wrong with 8k?

I see why you said 2point6 but its not the same crank just the same stroke.

B series mains are oiled different and im sure k series are also then H. flyrod said somthing about it in this thread https://honda-tech.com/zero...age=2

If he's boosting a stock f23 using stock rev limit then yea its fine, but using a h22 head i'd think he'd want to rev alittle more to bring the head to use

 

i came up with a concusion, im gonna sleeve my h22 block, run f23 rods and crank, and im also going to do valve springs and retainers,
then im going to put the pistons, 9:5:1 ratio, and run about 10-11 pounds, and i will use the apexi vfac2 to play with fuel and air curves, any thoughts, what would be the weakest point in that set up, and will i be able to run at 11 pounds with out being scared to blow the motor?, if you guys were to estimate, how long would it last?, thx,,,
your all a very good help, and this is the best forum ive been to for the ludes, thx alot,

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accord387 &raquo;</TD></TR><TR><TD CLASS="quote">samIam already overspun a h23 crank, so he goes bigger? dont understand that.

now under boost going to 8k i wouldnt want the f23 crank tahts my opinion

F series arnt crap for boost (i'm putting a f22 with a mild build for boost in my teggy), but when you want to push it further then the crank should go then yes it is crap imo.

I was just stating what i would do</TD></TR></TABLE>

I "went bigger" because i wanted an f-series block for boosting reason but liked the f23 better than the f22 for putting an h22 head on... And the only reason i spun rod bearings was because the car was over-revved and out of oil... Complete driver error... This motor will be tuned and have a set rev limit no where near 8k... So you are planning on using h22 crank and rods in an f22 and still use f22 head... So you are making a 2.1 L sohc non-vtec turbo motor???