mfg Posted January 22 Report Share Posted January 22 The weight difference between an Avanti R3 engine 'long block' and an Avanti R4 engine 'long block' is (approx) .....?..... ozs. 1) no difference......2) ten.....3) twenty five .....or.....4) forty (no intake manifold, Carbs, blower, exhaust manifolds, distributor, water manifold, shielding) Link to comment Share on other sites More sharing options...
mfg Posted January 22 Author Report Share Posted January 22 Ideas?...Thoughts? Link to comment Share on other sites More sharing options...
Dwight FitzSimons Posted January 22 Report Share Posted January 22 I will guess 4) forty. The only difference I can think of between an R3 long block and an R4 long block is the domed pistons in the R4. Noting that 40 is evenly divisible by 8 I figure 5 additional ounces per R4 piston (vs the R3) seems about right. --Dwight Link to comment Share on other sites More sharing options...
Nelson Posted January 22 Report Share Posted January 22 The R4 is heavier by the weight difference in the pistons Link to comment Share on other sites More sharing options...
mfg Posted January 22 Author Report Share Posted January 22 1 hour ago, Dwight FitzSimons said: I will guess 4) forty. The only difference I can think of between an R3 long block and an R4 long block is the domed pistons in the R4. Noting that 40 is evenly divisible by 8 I figure 5 additional ounces per R4 piston (vs the R3) seems about right. --Dwight Good deduction!.. However, the difference in weight is not 40 ounces Link to comment Share on other sites More sharing options...
mfg Posted January 22 Author Report Share Posted January 22 1 hour ago, Nelson said: The R4 is heavier by the weight difference in the pistons Yes, the difference is piston weight...Care to pick either answer # 2 or 3 ? Link to comment Share on other sites More sharing options...
Dwight FitzSimons Posted January 22 Report Share Posted January 22 3) twenty five Link to comment Share on other sites More sharing options...
pantera928 Posted January 23 Report Share Posted January 23 10 Link to comment Share on other sites More sharing options...
mfg Posted January 23 Author Report Share Posted January 23 10 minutes ago, pantera928 said: 10 Sorry, not 10 ozs! Link to comment Share on other sites More sharing options...
mfg Posted January 23 Author Report Share Posted January 23 1 hour ago, Dwight FitzSimons said: 3) twenty five YES!....25 is correct.....Roughly 3+ ounces per piston difference in weight. Link to comment Share on other sites More sharing options...
mfg Posted January 23 Author Report Share Posted January 23 Gee....that would add just over 1 1/2 lbs. of reciprocating weight to the R4 rotating assembly over the R3....NOT GOOD!! Link to comment Share on other sites More sharing options...
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