Originally Posted by
AustenW
The ST block is essentially a volvo 850 block which has been around for years
All the volvo boys discovered the block weakness some 15 years ago
There are two options for block strengthening
Darton Sleeves / or similar liner replacement
Drill and insert alloy pegs around the top part of the liner to stop it flexing under load
I do have pictures on my home computor so will see if I can upload them later on
the 2.0 and 2.3 blocks are 71mm bore so are stronger due to thicker walls
Its the 2.4 and 2.5's that suffer the most issues as they are the same block just overbored
All Jamsport are doing is re-inventing the wheel
Nothing new / secret - Its just new to the Ford Scene
no there not there a s40 or a c30r engine which are 25 mm shorter in hight an 65mm less in length , its a 9.1,1 comp racio rather than 8.5.1 on the volvo ! they might look the same but theres more differences but i cant be arsed to go into it but general idea is your pushing your luck above 350 bhp because the compression is to high but using darton liners witha lower comp forged piston kit then 500+bhp is easy but tbh mines 320 bhp 390lb an thats plenty on a road car being fwd