Avanti Weight!

[mfg]

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)

[mfg]

Ideas?...Thoughts?

[Dwight FitzSimons]

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

[Nelson]

The R4 is heavier by the weight difference in the pistons

[mfg]

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

[mfg]

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 ?

[Dwight FitzSimons]

3) twenty five

[pantera928]

10

[mfg]

10 minutes ago, pantera928 said:

10

Sorry, not 10 ozs!

[mfg]

1 hour ago, Dwight FitzSimons said:

3) twenty five

YES!....25 is correct.....Roughly 3+ ounces per piston difference in weight.

[mfg]

Gee....that would add just over 1 1/2  lbs. of reciprocating weight to the R4 rotating assembly over the R3....NOT GOOD!!