K-series - 2672cc: 90mm x 105mm short block
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K-series - 2672cc: 90mm x 105mm short block
These are pics of our newly assembled NA development short block. It features Darton sleeves, machined and installed by ERL Performance featuring their unique "Superdeck" built upon a brand new Honda core with zero miles. The pistons are our 90mm, JE customs (14.8:1cr) mated with 5.893" Cunningham rods and .150" wall Western Wristpins. The 99mm K24A4 crank has been modified and prepped by Castillo's Crankshaft Specialist, stroked to 105mm for extreme NA duty as it will net a 1.42:1 r/s ratio.
If this combo makes the same hp/cc as the 2240cc motor, the increase in displacement alone is good for ~60hp totally ignoring the two additional points of static cr we now have vs. the other setup. Plans are to test first with stock cylinder head and get to the dyno ASAP.
-Ron
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From: land of the sheep, home of the hypocrite
Re: K-series - 2672cc: 90mm x 105mm short block (Pondus)
Thanks for posting the pics! Very cool. Did anything need to be notched for clearance? Is that a K24 block? It seems like a taller block is desirable for stroker applications. Anyway, I'm looking forward to seeing the results. I hope it runs as good as it looks!
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From: Carson, CA
Re: K-series - 2672cc: 90mm x 105mm short block (CRXEE8)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXEE8 »</TD></TR><TR><TD CLASS="quote">Crazy stroke... what will you rev this too?</TD></TR></TABLE>
Wherever the cams make power...
People will learn 1 way or another that r/s ratios are really not as important as everyone thinks (street/strip drag motors)
Stroke and torque gets you win lights at the drag strip
Wherever the cams make power...
People will learn 1 way or another that r/s ratios are really not as important as everyone thinks (street/strip drag motors)
Stroke and torque gets you win lights at the drag strip
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Joined: Mar 2003
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Re: K-series - 2672cc: 90mm x 105mm short block (flyrod)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flyrod »</TD></TR><TR><TD CLASS="quote">Did anything need to be notched for clearance? Is that a K24 block? It seems like a taller block is desirable for stroker applications. Anyway, I'm looking forward to seeing the results. I hope it runs as good as it looks!
</TD></TR></TABLE>
K24 block as machined by ERL Performance, required no notching of the girdle or base of cylinders to accomodate the 105mm crank throughout its throw with the entire rotating assembly in place.
-Ron
</TD></TR></TABLE>
K24 block as machined by ERL Performance, required no notching of the girdle or base of cylinders to accomodate the 105mm crank throughout its throw with the entire rotating assembly in place.
-Ron
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Joined: Mar 2003
Posts: 488
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Re: K-series - 2672cc: 90mm x 105mm short block (CRXEE8)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXEE8 »</TD></TR><TR><TD CLASS="quote">Crazy stroke... what will you rev this too?</TD></TR></TABLE>
To date, we have 4 NA cam applications that can be tested on this motor. We determine that a 5th will be the one this motor likes the best. We have 10,000+rpm cams, but that won't be the one it likes (on paper). We'll see how the motor responds with the stock cylinder head, induction and exhaust systems we have.
First rpm target is just 7800rpm.
-Ron
To date, we have 4 NA cam applications that can be tested on this motor. We determine that a 5th will be the one this motor likes the best. We have 10,000+rpm cams, but that won't be the one it likes (on paper). We'll see how the motor responds with the stock cylinder head, induction and exhaust systems we have.
First rpm target is just 7800rpm.
-Ron
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From: NOR CAL
Re: K-series - 2672cc: 90mm x 105mm short block (Innovation)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation »</TD></TR><TR><TD CLASS="quote">
Wherever the cams make power...
People will learn 1 way or another that r/s ratios are really not as important as everyone thinks (street/strip drag motors)
Stroke and torque gets you win lights at the drag strip </TD></TR></TABLE>
Amen brother
Thanks for the info Edo and goodluck
Wherever the cams make power...
People will learn 1 way or another that r/s ratios are really not as important as everyone thinks (street/strip drag motors)
Stroke and torque gets you win lights at the drag strip
</TD></TR></TABLE>Amen brother
Thanks for the info Edo and goodluck
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From: East Bumfuckville, Wisconsin
Re: K-series - 2672cc: 90mm x 105mm short block (WHTZ)
any bets on the peak number???
ill be the house......
anybody know if this is the largest known honda 4 cylinder ever?
ill be the house......
anybody know if this is the largest known honda 4 cylinder ever?
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From: Deceptive, CA 805, Jerry Built NA.
Re: K-series - 2672cc: 90mm x 105mm short block (edo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by edo »</TD></TR><TR><TD CLASS="quote">You can be sure that longer strokes than this have been tried, but hardly publicized.
-Ron</TD></TR></TABLE> very true. How long you wait for the pistons? I am still waiting for my pistons.............they must like you more then me 
Slap that thing in already, so that the Pro am all motor races get crazy
-Ron</TD></TR></TABLE>
very true. How long you wait for the pistons? I am still waiting for my pistons.............they must like you more then me Slap that thing in already, so that the Pro am all motor races get crazy