well im in the market to build a nasty k24 frankenstein motor and want a target rpm to shoot for with forged internals. i want to keep the 99mm stroke and sleeve it 3-4mm over (90-91mm) for around 2.5-2.6 liters. im guessing around 7500rpm would be a target rpm with massive torque everywhere. streetablity would be nice so around 11.5-11.8 compression is target.
also, who makes sleeves for k-sereis? any prices?
thanks

 

Since you're sleeving 3-4mm oversize.. some forged pistons would be a must.

If you run of forged piston, I would think you can still rev to stock redline and even +500rpms would still be safe.

If the rotating parts are balanced well, motor is built well, blue printed etc, you shouldn't have problems.

Now you need a head setup that will flow well.

 

well, i was going to start with stock rsx head with rsx cams with about 7600 peak or ITR cams wirh around 8000 peak rpm. with that initial setup it would be nice to see 230ish whp with tons more torque. if i could get that r/s ratio to reach 8000, id be happy

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JunIntegra &raquo;</TD></TR><TR><TD CLASS="quote">well, i was going to start with stock rsx head with rsx cams with about 7600 peak or ITR cams wirh around 8000 peak rpm. with that initial setup it would be nice to see 230ish whp with tons more torque. if i could get that r/s ratio to reach 8000, id be happy
</TD></TR></TABLE>

When I said "stock redline" I was talking about the rsx stock redline.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00 FBP ItR &raquo;</TD></TR><TR><TD CLASS="quote">

When I said "stock redline" I was talking about the rsx stock redline. </TD></TR></TABLE>
well that would sure as hell be nice, 8500rpm
if i can get the bore upto 91.5mm, itll be a 2.6 4 cylinder
so far i have only seen 88mm sleeves from darton but i noticed another offered 90mm, i think it was IB but i dont know what sleeves there using..

 

ok. well Ive been doing some research lately on this same set-up. After chatting with what I consider to be some pretty reliable sources in the industry Ive come to the conclusion that everyone offers pretty much different opinions.

I think your being VERY realistic with the horsepower figures. About the revs...well I guess its up to the rods in the engine. Some builders believe the studs in the rods are the weak point and will give at high rpm's while others are sure that those rods...becuase of there size will be fine.

Money well spent on a good header system...will yeild huge gains. I also think a well thought out intake will up the power dramatically.

As with everthing tuning is a good idea. This is where it gets interesting...tuning one of these engines k24/k20 will really add some huge gains unlike what were used to in our b16 and b18s.

Piston speed is another point of debate. Also from what Ive seen most set-ups like this drop off in power well before 8000 rpm.

Another thing to consider is how long you intend to keep it at that high rpm level, for myself it wont be hitting 8000 but in a few rare occasions.

Were hoping to get around 250 whp when everything is said and done...but only time will tell.

 

thanks for the info man
as for bolt ons and tuning, id probably go with the toda race, 2.5-3" exhaust, and mugen intake. as for tuning, the hondata system seems to be best. i think if your along the same lines as my setup, i think more than 250whp can be had after tuning.
the stock k20a2 made 230whp on bolt-ons, cams and tuning.
now add, .5 liters of displacement, 11.5:1 compression and forgd internals and i can see 260-270whp. just my opinion, well see what happens

As for reving, your right, the power will definatly peak well before 8000, possibly before 7000 rpm. so i guess 7000-7500 rev limit would be fine

 

Right now Im sticking with my tanabe exhaust 2.5 in. However that will probably be moved up to 3 in. later when funds...well you know

Actually Im sold on just having my tuner build me a custom 3 in. exhaust. I think it will produce very well and not cost another arm and leg.

When it comes to tuning I think it depends on who you have in your area and what they tune with the best. Were going with the aem ems. A little more money but my tuner is REALLY good with those things.

I do have visions of up to 270 Whp but I dont want to get my hopes up. Gimme like three weeks and we should be all done. Actually our first car should be done in about two weeks.

 

Nice.

 

you might want to think of using the '04 s2k crank (destroke a stock k24 to 2.3 liters) or a k20a crank & custom length rods to help that R/S ratio.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adirondackR &raquo;</TD></TR><TR><TD CLASS="quote">you might want to think of using the '04 s2k crank (destroke a stock k24 to 2.3 liters) or a k20a crank & custom length rods to help that R/S ratio.</TD></TR></TABLE>
i thought about the s2k crank for a while, but then i realized why not get all the power i need by 7000 instead of revving the **** out of it to 9000. The extra torque does wonders also,like on corner exits and not needing to downshift so much.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JunIntegra &raquo;</TD></TR><TR><TD CLASS="quote">the stock k20a2 made 230whp on bolt-ons, cams and tuning.</TD></TR></TABLE>

are you talking about the k24 head with just the k20a2 head bolted on with new cams and tuning... that it'll produce 230whp?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tspkenneth &raquo;</TD></TR><TR><TD CLASS="quote">

are you talking about the k24 head with just the k20a2 head bolted on with new cams and tuning... that it'll produce 230whp? </TD></TR></TABLE>

I believe he is talking about a k20a (jdm R motor) stock block with with hondata, header, toda cams...laying down 230whp I have NOT seen a usdm k20a2 (RSX-S) motor lay down numbers that high

EDIT i did just find this
Quote, originally posted by 1FSTCAR »
To answer your question, the car weighed in at VMP today at 1610 with driver. As far as the radiator, it's a fluidyne kart radiator.
We couldn't get all the parts done on time so we had to use a stock TypeS motor with TypeR cams, Clutchmaster twin disk, custom throttle bodies, and NuImage Autosports K Series header. The ECU definately wasn't a Motec. Thanks to Derek at Hondata for the K Pro. The car made 232whp on a dynojet Saturday morning at 4AM. Not bad for stock motor.
stock type s motor w/ITR cams, ITBs & Hondata K-pro


skunk2 got 216whp out of a k24/20 hybrid swap with header, ITR cams, ported head, ecu (not sure what k24 block they are using)

see here https://honda-tech.com/zerothread?id=686058 for more info on k24/k20 potential...I linked an image of the dyno for skunk2's frankenstein motor

Hasport has gotten 208whp (originally 185whp in SCC magazine but not fully tuned) from a k24a1 (CRV - 9.6 CR) block mated w/a k20a2 head, ITR cams, header, hondata

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JunIntegra &raquo;</TD></TR><TR><TD CLASS="quote">
i thought about the s2k crank for a while, but then i realized why not get all the power i need by 7000 instead of revving the **** out of it to 9000. The extra torque does wonders also,like on corner exits and not needing to downshift so much.
</TD></TR></TABLE>

if you wind up throwing in big cams (toda or bigger) you'll be cutting short of peak power potential I bet the percentage increase in power would be greater than the percentage decrease in torque - if you destroked it to 2.3L - just IMO


Modified by adirondackR at 4:01 PM 5/20/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adirondackR &raquo;</TD></TR><TR><TD CLASS="quote">

I believe he is talking about a k20a (jdm R motor) stock block with with hondata, header, toda cams...laying down 230whp I have NOT seen a usdm k20a2 (RSX-S) motor lay down numbers that high

EDIT i did just find this
Quote, originally posted by 1FSTCAR »
To answer your question, the car weighed in at VMP today at 1610 with driver. As far as the radiator, it's a fluidyne kart radiator.
We couldn't get all the parts done on time so we had to use a stock TypeS motor with TypeR cams, Clutchmaster twin disk, custom throttle bodies, and NuImage Autosports K Series header. The ECU definately wasn't a Motec. Thanks to Derek at Hondata for the K Pro. The car made 232whp on a dynojet Saturday morning at 4AM. Not bad for stock motor.
stock type s motor w/ITR cams, ITBs & Hondata K-pro


skunk2 got 216whp out of a k24/20 hybrid swap with header, ITR cams, ported head, ecu (not sure what k24 block they are using)

see here https://honda-tech.com/zerothread?id=686058 for more info on k24/k20 potential...I linked an image of the dyno for skunk2's frankenstein motor

Hasport has gotten 208whp (originally 185whp in SCC magazine but not fully tuned) from a k24a1 (CRV - 9.6 CR) block mated w/a k20a2 head, ITR cams, header, hondata

if you wind up throwing in big cams (toda or bigger) you'll be cutting short of peak power potential I bet the percentage increase in power would be greater than the percentage decrease in torque - if you destroked it to 2.3L - just IMO


Modified by adirondackR at 4:01 PM 5/20/2004</TD></TR></TABLE>

you make some good points. im at a fork in the road right now. i have decided k seris...now its just between a k20a2 or k24/20. im waiting until there is some hard evidence of revability of the k24/20, and power curves. im really leaning towards the 24/20 for the simple fact of more average horsepower.

 

Supposedly, Hytech has built a fully built 2.3L K24 w/ itb's and made 320whp.

However, as of yet, they have not provided any dyno graphs, so who knows if that is really true.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adirondackR &raquo;</TD></TR><TR><TD CLASS="quote">
if you wind up throwing in big cams (toda or bigger) you'll be cutting short of peak power potential I bet the percentage increase in power would be greater than the percentage decrease in torque - if you destroked it to 2.3L - just IMO
Modified by adirondackR at 4:01 PM 5/20/2004</TD></TR></TABLE>

Werd. Also keep in mind that golden eagle makes deckplates for K-series. Using the 04' S2K Crank w/ a deckplate would yeild lower pistons speeds and a great rod/stroke ratio that would let you rev the **** out of that thing, and allow you to use cams with high duration.

 

any of you guys end up building the K24/K20's

how'd it go?

(sorry to revive thread, but these guys were talking BIG whp's!)

 

they all fell flat on there faces...

 

Keep on checking. Some K24s coming soon.

 

Yeah, I don't remember seeing any updates from anybody.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tinkerbell &raquo;</TD></TR><TR><TD CLASS="quote">
(sorry to revive thread, but these guys were talking BIG whp's!)
</TD></TR></TABLE>

especially for a street whip. lot stress on a race motor to be on someones street..bumper 2 bumper...etc.