I know the wrist pin diameter on the F20C was reduced over the F20B to reduce reciprocating weight. The diameter on the big end would contribute to weight of the rod but not as much to reciprocating mass I would think (more rotational).
Originally posted by marcucci No, looks like an Eagle or something else.
I know the wrist pin diameter on the F20C was reduced over the F20B to reduce reciprocating weight. The diameter on the big end would contribute to weight of the rod but not as much to reciprocating mass I would think (more rotational).
Do you know the BE diameter on the F20C marcucci?
Either way I guess it's a good thing for revs then?
Interesting indeed. I looked up some other info, and it appears that the F20B has the same big end diameter that the Honda Civic 1.5 SOHC (D15 1992-95) has! I found this info at http://www.crower.com/cat/import/honda/rods.shtml
What's the big end width of the F20 rod? If it's the same as the 1.5 liter Civic SOHC, you might be able to use those bearings. If not, you would have to import bearings too!
__________________
Billy - 98 Prelude
#27 H2 NASA TX HondaChallenge
#27 PTB NASA TX Performance Touring Racing makes heroin addiction seem like a vague wish for something salty. -- Peter Egan
Originally posted by 71dsp Interesting indeed. I looked up some other info, and it appears that the F20B has the same big end diameter that the Honda Civic 1.5 SOHC (D15 1992-95) has! I found this info at http://www.crower.com/cat/import/honda/rods.shtml
What's the big end width of the F20 rod? If it's the same as the 1.5 liter Civic SOHC, you might be able to use those bearings. If not, you would have to import bearings too!
Yeah I had seen that...I'll have to measure the width when I get home...
I have all the rod bearings that came with the crank...with low kms....you think I shouldn't re-use them? it's only been 20,000kms on the motor I'm pretty sure...or is that just a big no-no?
If you're going to use the same rods. I thought you had planned on doing custom rods. No?
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Billy - 98 Prelude
#27 H2 NASA TX HondaChallenge
#27 PTB NASA TX Performance Touring Racing makes heroin addiction seem like a vague wish for something salty. -- Peter Egan
Well, if you're going to run them to a high RPM, I would worry about the big end becoming egg shaped. Plus the additional power you're going to be generating. I thought a forged custom rod would be a better choice.
__________________
Billy - 98 Prelude
#27 H2 NASA TX HondaChallenge
#27 PTB NASA TX Performance Touring Racing makes heroin addiction seem like a vague wish for something salty. -- Peter Egan
Originally posted by 71dsp Well, if you're going to run them to a high RPM, I would worry about the big end becoming egg shaped. Plus the additional power you're going to be generating. I thought a forged custom rod would be a better choice.
Ahh everything is so expensive...it's tough to call cause I don't want to run above 8500rpms...I'll look into some prices..
I guess this is why I'm putting in an S engine...it may be awhile till I get this bad boy back!
I have yet to see any "data" on Honda bearings based on usage/mileage, but I can say that all the ones I've seen (save for Billy's!) looked great, even with high miles.
Originally posted by marcucci Then it sounds like you have your answer.
I have yet to see any "data" on Honda bearings based on usage/mileage, but I can say that all the ones I've seen (save for Billy's!) looked great, even with high miles.
The only drawback of ACL is they only make one size, they are within spec but may not be perfect for the specific rod. I guess honda would be the best choice. Plus B16 bearings must be cheap.
Still pretty interesting, that they went with that size...
You definitely want to size them for the crank (rod?!) and proper clearances. If they resist wear but are subjected to more because the clearances aren't right... that would make me suspicious. Or do they assume you will machine the crank to a specific size for fit?
Do you know what pin bores are for other motors, and BE diameters? Meaning, what are you going to do in terms of fitting a piston to a rod (what have/are you selecting?)?
Originally posted by marcucci Do you know what pin bores are for other motors, and BE diameters? Meaning, what are you going to do in terms of fitting a piston to a rod (what have/are you selecting?)?
I my post above I have put in similar motors, and I added the F20B of course.
The pin bore is the same as an H22a4 22mm floating wrist pin design, so I can use my Arias forged pistons no problem.
And as for cranks, I am using the F20B, but like I posted above someone could attempt to use F20B rods on B16A, B17A, B18A, B18B, and CR-V B20 cranks as well...
Yes, but you only put similar motors for similar specs. You don't mention what the pin bore is on the B series, for example. Is it smaller? If so, you could drill pistons out for those applications (if they match what bore you need). That's my point. I know YOU want to use your pistons but since you've gone this far... I'd like the info for me.
Originally posted by marcucci Yes, but you only put similar motors for similar specs. You don't mention what the pin bore is on the B series, for example. Is it smaller? If so, you could drill pistons out for those applications (if they match what bore you need). That's my point. I know YOU want to use your pistons but since you've gone this far... I'd like the info for me.
OH....
well now you have me thinking, well for the engines where the BE is an exact fit, the pin diameters are all 21mm. So if you drilled out 1mm they would accept an F20B rod
Also depending on bore size you could run H22 pistons...or I could run b-series pistons if they made 87mm bore, but the largest I am seeing is 86mm on the endyn rollerwaves..and the combustion chamber is smaller etc etc...so compression would be lower etc etc..
