With all the recent interest in Mugens latest release for the M20s it's worth reminding people ....... If their pockets are deep enough and they want something a little bit different then bigger capacity is a very good option.
We have been building stroked and oversized motors for years and there are quite a few different options.
As a breif summary most popular for people with older motors with a little bit of wear is just a simple refresh with a slight bore and hone and head rebuild 0.5mm oversized with new pistons and rods.
On a stock block we have gone to a maximum of 2.35l with a special crank, pistons and rods. Good idea to go slightly oversized valves and camshafts. At this capacity we would be sleeving the block as well.
Typically the 2.2motors with high spec intakes we have seen anything from 280-300bhp with specific camshafts for race applications making the power at high rpm and ITBs. The 2.35s we are running making that sort of power with RBC/RRC an big throttle bodies.
Worth mentioning the brief specs of our race cars that have been competing this year:
Seans Time Attack car is 86.5mm Cosworth piston and rods, darton sleeved block running 12.5 compression and pretty much stock head and making over 500bhp supercharged.
Adams Turbo drag car is an ERL sleeved block with a BC 2.2 stroker kit and camshafts. God knows what power it's making but we are snapping clean 1000bhp driveshaft shop axels!
Dougies Rotrex drag car is a stock un-sleeved block running the same BC2.2 stroker kit and camshafts and making way over 500bhp without the nitrous.
The M20 we have in has just had our own spec 2.2 motor installed but it been focused towards a slightly different purpose. More details shortly in a full build thread but we are hoping it will be all finished this week are pitting run in miles on it ready for final tuning.
To get an idea of what a 2.2 stroker pulls like here is a short clip of a car we did years ago running the Toda 2.2 engine kit and ITBs:
This is what it's like doing 9 seconds from 0-150 in a turbod 2.2
We have been building stroked and oversized motors for years and there are quite a few different options.
As a breif summary most popular for people with older motors with a little bit of wear is just a simple refresh with a slight bore and hone and head rebuild 0.5mm oversized with new pistons and rods.
On a stock block we have gone to a maximum of 2.35l with a special crank, pistons and rods. Good idea to go slightly oversized valves and camshafts. At this capacity we would be sleeving the block as well.
Typically the 2.2motors with high spec intakes we have seen anything from 280-300bhp with specific camshafts for race applications making the power at high rpm and ITBs. The 2.35s we are running making that sort of power with RBC/RRC an big throttle bodies.
Worth mentioning the brief specs of our race cars that have been competing this year:
Seans Time Attack car is 86.5mm Cosworth piston and rods, darton sleeved block running 12.5 compression and pretty much stock head and making over 500bhp supercharged.
Adams Turbo drag car is an ERL sleeved block with a BC 2.2 stroker kit and camshafts. God knows what power it's making but we are snapping clean 1000bhp driveshaft shop axels!
Dougies Rotrex drag car is a stock un-sleeved block running the same BC2.2 stroker kit and camshafts and making way over 500bhp without the nitrous.
The M20 we have in has just had our own spec 2.2 motor installed but it been focused towards a slightly different purpose. More details shortly in a full build thread but we are hoping it will be all finished this week are pitting run in miles on it ready for final tuning.
To get an idea of what a 2.2 stroker pulls like here is a short clip of a car we did years ago running the Toda 2.2 engine kit and ITBs:
This is what it's like doing 9 seconds from 0-150 in a turbod 2.2
