[Type 4 Unleashed]

Horsepower, for those of us on a budget.

Type 4 cranks come in 2 sizes 66mm & 71mm, anything larger, have to be welded up and ground or forged, both at a considerable cost.

For the low budgeter, start with a 66mm crank, they are cheap and abundant. have the 66mm (about 2.160 dia) crank offset ground to 75mm, journal size would then be 1.805 (vw rabbit dia.)
These cranks need to be standard on the rods, so there is enough room to offset to 75mm. Depending on the shop, it will cost $130.00 to $150.00.

Rods, now that you have a rabbit size journal, guess what kind of rod you have to use? If you guessed a rabbit rod you were correct. Rabbit rods are 150 grams lighter than a 2 ltr rod , that's
600 g a set, or 1.339 pounds, which in it self is horsepower, because that is 1.3 pounds off the recipercating weight. Length,
66mm rods are around 5.0", 71mm are about 5.165" Rabbit rods are about 5.350", which is a better rod to stroke ratio.
Rod prep: resizing and bushing, the bushing will depend on the
piston pin size you end up using. Resizeing, will have to be done after you have the bolts turned around, I used 3/8 big block chevy ARP rod bolts, cost effective. Rods will cost, about, $160.00.

I, will go into the piston and cylinder option, at a later time


HERE ARE SOME ENGINE SIZES: CHEVY DIA TO MM

96 X 75=2171 4.005 - 101.7

103 X 75=2500 4.030 - 102.4

104.8 X 75=2588 4.060 - 103.1

105.5 X 75=2598 4.125 - 104.8

105.7 X 75=2632 4.155 - 105.5

4.161 - 105.7