giangi

Going to start my new 4g64 block project, i would have focused my interest in two options, using a 94 mm or a 97 mm cranckshaft, both are available on the market, so, for trying to obtain the maximum result as regards displacement and revability, using 87 mm stroker pistons, i have realized that 157.5 mm lenght rods for 97 crank and 159 mm for 94 cranks would be the best option, but looking at the market place i can't find them in normal production, could somebody tell me about anyone who can build these rods for me, and even the pistons, as i can't find in normal production 87 mm stroker pistons?
Thanks in advance....
Gianluca.

1d10t

iTrader: (19)

How did u figure that rod length?

giangi

Starting from that in a 4g64 block using stroker pistons for a 88 mm destroker rods are 162 mm and at the opposite for a 100 mm stroker rods are 156 mm, with a 97 crank ideal rods should be 157.5 mm, with a favorable rod ratio of 1.62 with 2.306 l displacement, and with a 94 mm crank rods should be 159 mm, with a even better rod ratio of 1.69 and 2.235l displacement. In my opinion these options would be a really good point of compromise between displacement and a good revability, around safe 8500/8700 rpm, or not? I would be tempted to try, always if who builds custom rods can make four rods for me at a reasonable price, and i find 87 mm stroker pistons, on normal builders' catalogues i find 0.40 max overbore, 86 mm.......

giangi

Nobody can help me? From Italy it's not a simple research, especially with my poor spoken english.....

Ted B

iTrader: (6)

94 and 97mm cranks are unusual, and I do not know of easily available pistons and rods for using those cranks with a 4G64 block. As you already know, you can use a stroker piston with a custom length rod. Getting custom length rods will usually cost you around €1000, and will require 60-90 days. Contact AMS and ask them about a custom length Oliver rod. They should be able to order them for you.

giangi

Thank you very much, i will contact AMS, btw they use K1 cranks, in that case i could do a single global purchase.....

CO_VR4

iTrader: (83)

Magnus Motorsports has the crank length you're inquiring about, and custom rods and pistons to match.