Long Rod - Short Stroke H22 build?
04-28-2009, 06:16 PM
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Long Rod - Short Stroke H22 build?
Getting ready to throw on some snailage to the H22a and wanting to get something sitting on the stand and in the assembly process.
I'm a big fan of 1.6-1.75 RS ratio which the H fails at...
Is there anyway to run a F20B short stroke crank with longer rods? Wanting 9.5-10.1 compression with a better RS ratio...
Most likely will be in a OBD1 H22a Closed Deck block with Iron liners.
Any suggestions on pistons/rods/crank? Only going to spin it to 8k but want to take some stress of things with a better RS ratio and a little better/quicker reving ability...
-Jerod
I'm a big fan of 1.6-1.75 RS ratio which the H fails at...
Is there anyway to run a F20B short stroke crank with longer rods? Wanting 9.5-10.1 compression with a better RS ratio...
Most likely will be in a OBD1 H22a Closed Deck block with Iron liners.
Any suggestions on pistons/rods/crank? Only going to spin it to 8k but want to take some stress of things with a better RS ratio and a little better/quicker reving ability...
-Jerod
04-28-2009, 07:09 PM
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Re: Long Rod - Short Stroke H22 build?
I had an h22 for years that saw close to 9k rpms on a regular basis. Even 10k+ on a few mis-shifts and never had a problem with it.
Making your r/s ratio "better" is a waste of $$$ and time when an H22 can spin 8k all day as it is.
Spend your money on better stuff like a good turbo, manifold, and a good EMS.
Making your r/s ratio "better" is a waste of $$$ and time when an H22 can spin 8k all day as it is.
Spend your money on better stuff like a good turbo, manifold, and a good EMS.
04-28-2009, 07:18 PM
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Re: Long Rod - Short Stroke H22 build?
I had an h22 for years that saw close to 9k rpms on a regular basis. Even 10k+ on a few mis-shifts and never had a problem with it.
Making your r/s ratio "better" is a waste of $$$ and time when an H22 can spin 8k all day as it is.
Spend your money on better stuff like a good turbo, manifold, and a good EMS.
Making your r/s ratio "better" is a waste of $$$ and time when an H22 can spin 8k all day as it is.
Spend your money on better stuff like a good turbo, manifold, and a good EMS.
Reliablility of rods and bearings are directly related to the rod/stroke ratio... I don't want to **** away 3k on a built engine just to have to rebuild it every year..
I don't want to spin any faster than 8k... I could care less - I want a built and RELIABLE (for what its worth) engine that revsgi quickly... Any true engine builder will tell you a short stroke long rod engine with a proper RS ratio will live a happier healthier life than a short rod long stroke engine with a low RS ratio..
-Jerod
04-28-2009, 07:42 PM
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Re: Long Rod - Short Stroke H22 build?
b18c5 - 1.58:1 r/s ratio
h22a1,4 - 1.59:1 r/s ratio
Do you notice anything here? I really dont think you can outsmart honda, since their reliability is one of the things that already attract so many. So now its not good enough?
If you want a reliable engine as far as rod bearings go then make damn sure the clearances are correct, the crank is perfect, and dont try to engineer something that was already well thought out.
h22a1,4 - 1.59:1 r/s ratio
Do you notice anything here? I really dont think you can outsmart honda, since their reliability is one of the things that already attract so many. So now its not good enough?
If you want a reliable engine as far as rod bearings go then make damn sure the clearances are correct, the crank is perfect, and dont try to engineer something that was already well thought out.
04-29-2009, 01:03 PM
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Re: Long Rod - Short Stroke H22 build?
b18c5 - 1.58:1 r/s ratio
h22a1,4 - 1.59:1 r/s ratio
Do you notice anything here? I really dont think you can outsmart honda, since their reliability is one of the things that already attract so many. So now its not good enough?
If you want a reliable engine as far as rod bearings go then make damn sure the clearances are correct, the crank is perfect, and dont try to engineer something that was already well thought out.
h22a1,4 - 1.59:1 r/s ratio
Do you notice anything here? I really dont think you can outsmart honda, since their reliability is one of the things that already attract so many. So now its not good enough?
If you want a reliable engine as far as rod bearings go then make damn sure the clearances are correct, the crank is perfect, and dont try to engineer something that was already well thought out.
Such low R/S ratios put high loads on main bearings and rods...
My WRX has a 1.65 RS ratio (which is considered to be the bottom end of good)... A GSXR 1000 mysteriously has a 1.88 R/S ratio...
Most sportibke RS Ratio's are high 1.8x's - So your telling me sportbikes aren't properly engineered???
-Jerod
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