F24C Long Rod Engine Build 2.4L
03-08-2017, 07:55 AM
#101
Originally Posted by HotMess
I'm interested in this, mostly because i'm a materials nerd. I don't mean to detract from your thread, but this may be useful to you or others. Obviously it's not a 'superalloy' because they're aluminum pistons, but Honda makes no mention of what they're made of in their SAE technical paper on the engine. They only say that they're 'aluminum forged'. It'd be interesting to see what they are actually made up from, which would have to stand up to the FRM cylinders.
Does anybody have a used/bad F20/F22 piston to send me that I can cut up and figure out what they're made of?
Does anybody have a used/bad F20/F22 piston to send me that I can cut up and figure out what they're made of?
Lmk
03-13-2017, 10:48 AM
#104
Former Sponsor
Thread Starter
Some more assembly getting done. Everything is going very simply, just like standard assembly.
Our extended timing chain turned out to be perfect for this higher deck application. All we needed to do was adjust the cam timing via our Adjustable Drive Gear to center the crank and cams to TDC. We only needed 1 degree advance.
Here is a shot of our adjustable drive gear.
Our extended timing chain turned out to be perfect for this higher deck application. All we needed to do was adjust the cam timing via our Adjustable Drive Gear to center the crank and cams to TDC. We only needed 1 degree advance.
Here is a shot of our adjustable drive gear.
03-13-2017, 11:58 AM
#105
4Piston built one for a Wolf GB08 CN car running in SCCA P1. They shared some info on K20a.org (2.0L Road Race Engine on the dyno - K20A.org .:. The K Series Source . Honda / Acura K20a k24a Engine Forum) and the car is being sold: JFC Racing » 2012 Wolf GB08. I think they got 330hp @ 11,000rpm from a 2L 86x86. The 4Piston engine must have been sold separately. I think he was asking $20k for it.
?
03-13-2017, 07:18 PM
#107
Former Sponsor
Thread Starter
03-14-2017, 01:15 AM
#108
My dream engine would be:
Standard F22 90.7mm crank
164mm long rods (titanium, so as not to exceed the OEM weight).
K-tech lower compression height pistons (23.2mm compared to 30mm - required to prevent pistons sticking out of bore)
This deck plate (required to achieve the additional 7.55mm deck height for the longer rods)
2200cc capacity with the ability to rev to over 9k (same piston speed as standard F20C, due to longer rod giving identical 1.82 ratio)
12.5:1 compression ratio and hopefully around 310-320bhp with a nicely ported head / matched valve sizes.
The only thing that isn't currently available are the rods, which would have to be made to order - everything else is already out there......
Standard F22 90.7mm crank
164mm long rods (titanium, so as not to exceed the OEM weight).
K-tech lower compression height pistons (23.2mm compared to 30mm - required to prevent pistons sticking out of bore)
This deck plate (required to achieve the additional 7.55mm deck height for the longer rods)
2200cc capacity with the ability to rev to over 9k (same piston speed as standard F20C, due to longer rod giving identical 1.82 ratio)
12.5:1 compression ratio and hopefully around 310-320bhp with a nicely ported head / matched valve sizes.
The only thing that isn't currently available are the rods, which would have to be made to order - everything else is already out there......
03-14-2017, 06:14 AM
#109
My dream engine would be:
Standard F22 90.7mm crank
164mm long rods (titanium, so as not to exceed the OEM weight).
K-tech lower compression height pistons (23.2mm compared to 30mm - required to prevent pistons sticking out of bore)
This deck plate (required to achieve the additional 7.55mm deck height for the longer rods)
2200cc capacity with the ability to rev to over 9k (same piston speed as standard F20C, due to longer rod giving identical 1.82 ratio)
12.5:1 compression ratio and hopefully around 310-320bhp with a nicely ported head / matched valve sizes.
The only thing that isn't currently available are the rods, which would have to be made to order - everything else is already out there......
Standard F22 90.7mm crank
164mm long rods (titanium, so as not to exceed the OEM weight).
K-tech lower compression height pistons (23.2mm compared to 30mm - required to prevent pistons sticking out of bore)
This deck plate (required to achieve the additional 7.55mm deck height for the longer rods)
2200cc capacity with the ability to rev to over 9k (same piston speed as standard F20C, due to longer rod giving identical 1.82 ratio)
12.5:1 compression ratio and hopefully around 310-320bhp with a nicely ported head / matched valve sizes.
The only thing that isn't currently available are the rods, which would have to be made to order - everything else is already out there......
