R/S Ratio....
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I was also doing some playing around with certain rods/pistons etc...
B18a block, B18c1 head, CTR pistons, B16 rods. Would you have to mod the rods at all, like move the pin up/down? If not wouldn't this be a pretty good combo being as it would have like an 11:1 c/r, and should have a great R/S like the B16.
*shrug* I was bored at work. Who knows.
B18a block, B18c1 head, CTR pistons, B16 rods. Would you have to mod the rods at all, like move the pin up/down? If not wouldn't this be a pretty good combo being as it would have like an 11:1 c/r, and should have a great R/S like the B16.
*shrug* I was bored at work. Who knows.
bored at work
Joined: Oct 2000
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b16a rods are 134mm, Ls rods are 137mm so you will have a worse ratio and the piston will sit way below the deck.
1.54 ratio of the ls ain't that bad. It is actually very good for a wide power band. The cylinder wall angles relative to the pin become more severe when the bore is bigger like in a crv engine. This can be combated somewhat by moving the ring package and wrist pin up, allowing for a longer rod. There are compromises though, the higher you move the pin up you are either going to:
1. move the pin so the oil scrapper rings are positioned over the wrist pin hole. This sin't too bad as long as it is only the upper portion of the hole.
2. compress the ringland gaps too small and thus weakening them.
or a combination of the two. Moving the pin up much is not a good idea on FI apps as you want a nice fat ringland gap especially between the first two rings.
Moving the wrist pin about 3.5mm (.137") is pretty good for an lsvtec you can up the rod ratio to 1.58:1 or same as a gsr without putting the oil scrapper rings in the hole. These pistons with the wrist pin moved up are quite common, Wiseco makes them as a shelf item now and Eagle makes a rod to go with it.
1.54 ratio of the ls ain't that bad. It is actually very good for a wide power band. The cylinder wall angles relative to the pin become more severe when the bore is bigger like in a crv engine. This can be combated somewhat by moving the ring package and wrist pin up, allowing for a longer rod. There are compromises though, the higher you move the pin up you are either going to:
1. move the pin so the oil scrapper rings are positioned over the wrist pin hole. This sin't too bad as long as it is only the upper portion of the hole.
2. compress the ringland gaps too small and thus weakening them.
or a combination of the two. Moving the pin up much is not a good idea on FI apps as you want a nice fat ringland gap especially between the first two rings.
Moving the wrist pin about 3.5mm (.137") is pretty good for an lsvtec you can up the rod ratio to 1.58:1 or same as a gsr without putting the oil scrapper rings in the hole. These pistons with the wrist pin moved up are quite common, Wiseco makes them as a shelf item now and Eagle makes a rod to go with it.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richeypm me if you are interested in trying a free class at any of the gyms.
tamparacing.com
