...You can use stock pins to get partway back or find some good 273 pins to get it really close, or just get the crank alone balanced to the new bobweight...
273 Pins are shorter than 318, 340, and 360.
...You can use stock pins to get partway back or find some good 273 pins to get it really close, or just get the crank alone balanced to the new bobweight...
I had a stock compression 318 best of 10-12 mpg compression ratio of 8:1 and that was after I added 302 heads pumping out a weak 120psi, I built a 9:2 roller with the same 302 heads pumping out 155 psi cold test way different beast more power and overall better mpg lots of torque 15 city with 3.55 the bump in compression was worth it more compression you can Get away with more camshaft and not turn the motor into a dog. The extra effort was worth it.I may just say **** it, just rering whats there, do a valve job on what I have, new bearings and gaskets odds n ends and thats it.
By about 0.2" so not any issue for overall length. They'll bear in the pin bosses a length of around 0.7" which is plenty to spread the pressure. 2BBL 273 pins weight around 211 grams, vs 154 for the 318/340/360 pins.273 Pins are shorter than 318, 340, and 360.
Probably H814's...still .067" in the hole in an LA block, and around .050" in the hole in a later blockYou can buy flat top roller motor pistons off rock auto they are taller will give you a great CR true 9:1 roller motors have the pistons .040 in the hole, taller piston closer deck height. 302 heads are 64ccs
Yep easy to get to that point. Those Wiseco's....I can't find the weights in their catalogs or anywhere but being forged (rather than hypers like the KB's) might make them heavy enough. You could deck the block and change pushrods to make the stockish pistons work at a higher SCR.I may just say **** it, just rering whats there, do a valve job on what I have, new bearings and gaskets odds n ends and thats it.
Can't get a better testimonial for this type of change than that. For street use, the added low RPM torque works for you in many ways.I had a stock compression 318 best of 10-12 mpg compression ratio of 8:1 and that was after I added 302 heads pumping out a weak 120psi, I built a 9:2 roller with the same 302 heads pumping out 155 psi cold test way different beast more power and overall better mpg lots of torque 15 city with 3.55 the bump in compression was worth it more compression you can Get away with more camshaft and not turn the motor into a dog. The extra effort was worth it.
When you say roller motor piston, are you talking about a 1991 318 or magnum engine?You can buy flat top roller motor pistons off rock auto they are taller will give you a great CR true 9:1 roller motors have the pistons .040 in the hole, taller piston closer deck height. 302 heads are 64ccs
When you say roller motor piston, are you talking about a 1991 318 or magnum engine?
H814CP is the taller stock cast type out there right now. Same aftermarket pistons as for the 5.2 Magnum. A tad taller than waht slantsix is referring to. Around 8.9 SCR with .028" head gaskets and 62 cc chamber heads on an LA. No eyebrows is part of that CR..... so keep an eye on P-V clearance; that cam you linked probably is a slow ramp cam and does not have a ton of lift or duration, so that helps.So since the 69 teener factory slugs are no longer obtainable and it seems aftermarket cast slugs are below deck height which one is closer to zero deck height?
H814CP is the taller stock cast type out there right now. Same aftermarket pistons as for the 5.2 Magnum. A tad taller than waht slantsix is referring to. Around 8.9 SCR with .028" head gaskets and 62 cc chamber heads on an LA. No eyebrows is part of that CR..... so keep an eye on P-V clearance; that cam you linked probably is a slow ramp cam and does not have a ton of lift or duration, so that helps.
That's what I used on my 273.Like the size and specs on this one
Mr. Gasket Head Gaskets 1121G
Made for the LA 318s 4.140 in. Gasket Bore; 0.028 in. Compressed Thickness
Liking these specs a lot, wish they can keep them from leaking. Probably have to make sure surfaces are machined straight and clean.