ClioSport.net
Register a free account today to become a member!
Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
-
When you purchase through links on our site, we may earn an affiliate commission. Read more here.
larger capacity f4r (2.2l?)
- Thread starter MarkM
- Start date
Financially no, only for the hardcore.
New crank, rods and pistons, block bored and a different head gasket are the basics.
Technically you dont gain peak bhp but you gain potential bhp as you actually build more torque and lower the point of peak torque and point of peak power. This allows you to run a wilder camshaft without the drawbacks, so then you can make more power.
Its very expensive though.
New crank, rods and pistons, block bored and a different head gasket are the basics.
Technically you dont gain peak bhp but you gain potential bhp as you actually build more torque and lower the point of peak torque and point of peak power. This allows you to run a wilder camshaft without the drawbacks, so then you can make more power.
Its very expensive though.
Clio Phase II 16V
would be a good project!
If it could be bored any further I suspect Renault would have built the Sport 2 litre version with a bit bigger bore and a bit shorter stroke. With its already long stroke you wouldn't get any more bhp by stroking it even further, because you'd have to reduce the maximum revs.
The F4R looks like an engine that was originally designed to be a maximum of 1.8 litres, that has already been pushed out to its engineering limits by taking it to 2 litres.
That said, look what Toyota did with its 1.8 litre motor. It was designed as a 1.6. They stretched it to 1.8 by putting a relatively long-stroke crank in it. Then they wanted a performance version, which was a problem because it was already too long-stroke to rev hard, so they produced another version of the same engine with a shorter stroke and bigger bore. They got the bigger bore by casting the block out of a metal-silicon composite that pistons could run directly in without liners, which let them run a bigger bore with the same bore spacing.
The F4R looks like an engine that was originally designed to be a maximum of 1.8 litres, that has already been pushed out to its engineering limits by taking it to 2 litres.
That said, look what Toyota did with its 1.8 litre motor. It was designed as a 1.6. They stretched it to 1.8 by putting a relatively long-stroke crank in it. Then they wanted a performance version, which was a problem because it was already too long-stroke to rev hard, so they produced another version of the same engine with a shorter stroke and bigger bore. They got the bigger bore by casting the block out of a metal-silicon composite that pistons could run directly in without liners, which let them run a bigger bore with the same bore spacing.
