Vlad's rides thread

[Holden202T]

geez I didn't think there would be a lot of wall to play with for offsetting a 202!! I guess you could always sleeve it!

interesting ... but I think that's way to much for my liking, i'll stick to where they are from factory and improve other aspects

[vlad01]

Fitting pistons in 'backwards' was a common practice in HQ racing and speedway 202 engines, would alter the timing of the piston, leaves the piston in 'compression' stage for slightly longer - helps produce torque in the low to mid range.

As Vlad said, not good for wear or noise.

spot on

[vlad01]

excuse my mspaint skillz, but ive also heard of a bloke boring a 202 at an angle and then decking the block at the same angle to effectively achieve this. apparently it increased torque by a decent margin. the theory was having a more direct push on the crank allowed more power to be transferred for longer during the power stroke or something to that effect.

offset.png

yeah I heard if its the same guy, he called it a tangential engine layout and the gains were significant too.

[Gareth]

but ive also heard of a bloke boring a 202 at an angle and then decking the block at the same angle to effectively achieve this

might this have been done by moving the crank tunnel?

[vlad01]

but ive also heard of a bloke boring a 202 at an angle and then decking the block at the same angle to effectively achieve this

might this have been done by moving the crank tunnel?

Thats how I have heard it was done.

[Chuff]

but ive also heard of a bloke boring a 202 at an angle and then decking the block at the same angle to effectively achieve this

might this have been done by moving the crank tunnel?

But then it wouldn't line up true with the gearbox, or am I missing something?

[Holden202T]

yeah theres no easy way to do it either waY

[Gareth]

Think outside the square...

Weld up the bell housing mounting holes and relocate.

We aren't talking about inches of relocation, more like thou's...

I love this topic, could talk about creative engine engineering all day, like gun-barrel drilling cranks, removing crank counter weights, etc..



Sorry to thread-jack Vlad

[Chuff]

We aren't talking about inches of relocation, more like thou's...

But would an offset measuring in the thou's of an inch make that much, if any, difference?

Just asking.

[vlad01]

We aren't talking about inches of relocation, more like thou's...

But would an offset measuring in the thou's of an inch make that much, if any, difference?

Just asking.

dyno sim shows a hp or 2 or 3 for 50 thou offset in the piston pin so yeah I think it would.