Engine recommendations
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Honda-Tech Member
Joined: Sep 2006
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From: Co Springs, Co, El Paso
Engine recommendations
I finished the build on the Accord's brakes/suspension. It all went very nicely. Done mostly near stock, with HR springs, Tokiko struts, upgrade calipers, ES bushings. It handles great- good cornering, minimal sway, very smooth on the freeway.
It's time to pull the engine and go through it (F22B2/SOHC) I am not going to go nuts-
0.5+mm SS valves/ mild street-cam/cam adj gear/upgrade springs
stock FI and ECU
(existing) cat-back and add DC 4-2-1 headers
stock crank (balanced) with lightweight rods
ported TB and heads
All designed to give me some more power for street/freeway (daily driver) without killing gas-mileage/ designed for 100,000 miles trouble free use. I have a good machinist, but am having problems with the pistons.
All that is "on the shelf" for this block is stock dia. 8.8/1 forged pistons. A waste with the valvetrain/porting/headers etc. I had a joker from an e-company tell me I could get apx. 10.3/1 compression from boring +20 and shaving the head 20-30. I had a good laugh over this, and so did my machinist.
I wanted to stay at about 10/1 max. I have done my reading, and most builders say the stock ECU is good to around 10.3/1 compression. So the question is how to get more compression?
JE can mill a custom piston, but you have to give them your specs. I am a very good mechanic (30+ years getting greasy), but my experience building engines is from off the shelf parts for big-blocks. I have purchased/read 3 books for Honda engine-building, but they had zero information regarding design of pistons to increase compression.
Anyone out there have any suggestions as to where I can get the info I need to rough-design the pistons? I need to find out if 10/1 is possible (or what is possible). I could bore the block and resleeve for a larger bore, but the sleeves would cost a fortune. I could bore +20, shave the head slightly and use a higher-dome piston, but I have found no information as to which of any/all these methods I should use.
My machinists is very good, but can only offer to CC the heads once the engine is apart to calculate what could be done for piston-design. This would have the engine out for 1-4 months, depending on rod/piston manufacturing schedules.
This engine has been unbelievable- 105,000 miles with zero breakdowns or headaches. The SOHC non-VTEC is extremely dependable and easy to work on. I am not building the block for racing, but it would be nice to have more HP/torque for daily use. We will have the car 20 years from now, as a daily driver, so I don't want a 300 HP engine. I calculate, if I can get apx. 10.0 compression, I will end up with around 25-30 more dependable HP.
The reason I included this was last time I asked RE valve parts some people went nuts regarding comments for NOX/strokers etc. I plan to build the entire engine at around $2500-$2700, and use it for 10+ more years with no headaches. Any info as to how to go about getting info about F22B piston-design for around 10/1 compression would be appreciated.
It's time to pull the engine and go through it (F22B2/SOHC) I am not going to go nuts-
0.5+mm SS valves/ mild street-cam/cam adj gear/upgrade springs
stock FI and ECU
(existing) cat-back and add DC 4-2-1 headers
stock crank (balanced) with lightweight rods
ported TB and heads
All designed to give me some more power for street/freeway (daily driver) without killing gas-mileage/ designed for 100,000 miles trouble free use. I have a good machinist, but am having problems with the pistons.
All that is "on the shelf" for this block is stock dia. 8.8/1 forged pistons. A waste with the valvetrain/porting/headers etc. I had a joker from an e-company tell me I could get apx. 10.3/1 compression from boring +20 and shaving the head 20-30. I had a good laugh over this, and so did my machinist.
I wanted to stay at about 10/1 max. I have done my reading, and most builders say the stock ECU is good to around 10.3/1 compression. So the question is how to get more compression?
JE can mill a custom piston, but you have to give them your specs. I am a very good mechanic (30+ years getting greasy), but my experience building engines is from off the shelf parts for big-blocks. I have purchased/read 3 books for Honda engine-building, but they had zero information regarding design of pistons to increase compression.
Anyone out there have any suggestions as to where I can get the info I need to rough-design the pistons? I need to find out if 10/1 is possible (or what is possible). I could bore the block and resleeve for a larger bore, but the sleeves would cost a fortune. I could bore +20, shave the head slightly and use a higher-dome piston, but I have found no information as to which of any/all these methods I should use.
My machinists is very good, but can only offer to CC the heads once the engine is apart to calculate what could be done for piston-design. This would have the engine out for 1-4 months, depending on rod/piston manufacturing schedules.
This engine has been unbelievable- 105,000 miles with zero breakdowns or headaches. The SOHC non-VTEC is extremely dependable and easy to work on. I am not building the block for racing, but it would be nice to have more HP/torque for daily use. We will have the car 20 years from now, as a daily driver, so I don't want a 300 HP engine. I calculate, if I can get apx. 10.0 compression, I will end up with around 25-30 more dependable HP.
The reason I included this was last time I asked RE valve parts some people went nuts regarding comments for NOX/strokers etc. I plan to build the entire engine at around $2500-$2700, and use it for 10+ more years with no headaches. Any info as to how to go about getting info about F22B piston-design for around 10/1 compression would be appreciated.
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