Pistons

[playwme]

Your preaching to the choir here. I started off on a CBR250RR (18k redline) followed by a VFR400 and then a CBR1000RR the week they were released in shops. Then I got converted to Motards (KTM 640 and 690) and picked up a VTR1000SP1 for the hell of it. I also spent 4 years as Service Manager at a Dealership where I got to ride everything with 2 wheels. Been through a few dirtbikes as well. Currently have a WR250R (enduro) and a WR250X (motard) in the shed. Main reason's for the 250's was preservation of licence and cheap rego. The missus can use both as well. There was one stage where there were so many different bikes in the shed it was getting ridiculous so we decided to cut back.

[0488TINTER]

the real fun it pulling up next to somethig like a Ducati 900 (in your car) and smoking them

the look is priceless

[wbute]

Blocker do some research into the old Commodore cup engines. I just read they made around 300hp using red motor heads. 300 hp from a 253 is not too bad at all.
Here is a link with some info.

http://cams.com.au/en/Common/Bulleti...gulations.ashx

[0488TINTER]

Blocker do some research into the old Commodore cup engines. I just read they made around 300hp using red motor heads. 300 hp from a 253 is not too bad at all.
Here is a link with some info.

http://cams.com.au/en/Common/Bulleti...gulations.ashx

Depending on how your memory is back in the early 90s there was an article done in street machine where they built and gave away a 400hp 253

Chris Hillman from Radical Innovations (Yennora NSW) done it
Chris has retired and moved to central coast last i saw him

[wbute]

Yeah remember they were going to do it then I went overseas and never saw the actual article.
350-400hp from a 253. When you compare the 253 to a 250 Ford 6 instead of a 308 (which was the motor they were up against) you really have to say they were a greta motor. I dont know if you can get 350 hp from a 250 6 but I suppose anything is possible.

[HK1837]

A 4.1L Ford inline 6 probably has at least as much potential as a carbied 253. Especially the alloy headed crossflow engines.

253's are a great little engine. Making them go harder doesn't take all that much. Inlet manifold and carby aside though there is no secret of the easiest and cheapest way to make them go harder at rebuild time. Only involves 2 x parts: Block and crankshaft! So just replace the 253 block with a 308 block. And use 308 crank or a VR-VT 350 crank. Everything else costs the same as 253 replacement parts: pistons, cam, machining costs etc.

[Blocker]

_{Nice idea but in my case the block numbers match the chassis and plates, so my rebuild is more for nostalgic reasons rather than performance.}

[RodneyHZ253]

Yeah remember they were going to do it then I went overseas and never saw the actual article.
350-400hp from a 253. When you compare the 253 to a 250 Ford 6 instead of a 308 (which was the motor they were up against) you really have to say they were a greta motor. I dont know if you can get 350 hp from a 250 6 but I suppose anything is possible.

Evolution of this 250falcon motor is in the standard falcon today 195kw,261hp and in the xr6 turbo 270kw or 362 hp

[playwme]

the real fun it pulling up next to somethig like a Ducati 900 (in your car) and smoking them

the look is priceless

That would be the "Were we racing?" look.