NOR-CAL General Chat.

[Cabriolet]

the piston and rods are always in compression. however the crank is in tension/torsional. and tensional force is always harder on materials and torsional is the hardest on metal. this is why the crank MUST be forged. on low spin engines cast rods are fine because they are lighter but weaker. for all high power or high spin engines the rods must be forged. forged pistons are incredibly rare.

[kronus]

Pretty sure rods are in tension on at least one of the four cycles...

[Cabriolet]

Pretty sure rods are in tension on at least one of the four cycles...

only if the engine is not free flowing. the exhaust should be pulling the air into the cylinders on the intake stroke. but either way is very very low tension in compared to the 2 major compression strokes.

[decay]

The pistons. Then the rods. It doesn't matter. The low boost setup you're talking about running but will never actually be running won't hurt anything. Mostly due to the fact you won't be running it ;)

zing!

but yeah. don't worry about the bottom end parts. difference between cast and forged comes into play at 1+bar/above 7000rpm.

also: the M20 is also a "tiny" engine, just a heavier one with shitty head cfm numbers that's a pain in the ass to work on because it's shoehorned into a space designed for M/S1* derivatives. compare M42 (or the last 4 cylinders of an M50) vs. M20 flow bench sometime.

[ohthejosh]

Thinking of reverting my car back to DBs and justing waiting for an opportunity to snatch me a set of euro bumpers.

Some opinions would be much appreciated.

[YosemiteSam]

Anyone know of a good way to get the CSB off the driveshaft without a puller?

[Cabriolet]

there is a C-clip u need to remove and it will fall off in hand. no puller needed.


#10

[HerbReal]

someone hop on this like yesterday!

I emailed this guy, I NEED this one!

[Vivek]

zing!

but yeah. don't worry about the bottom end parts. difference between cast and forged comes into play at 1+bar/above 7000rpm.

also: the M20 is also a "tiny" engine, just a heavier one with shitty head cfm numbers that's a pain in the ass to work on because it's shoehorned into a space designed for M/S1* derivatives. compare M42 (or the last 4 cylinders of an M50) vs. M20 flow bench sometime.

I was thinking about that earlier. Finally someone in here doesn't think that the m20 is a gift from god. Ill probably never run over 1bar boost and ill probably keep the revlimit at the stock 6500 because things tend to fuck up past then. Thanks for the input :)

The pistons. Then the rods. It doesn't matter. The low boost setup you're talking about running but will never actually be running won't hurt anything. Mostly due to the fact you won't be running it ;)

;) ill get it running. Almost $500 in my turbo fund so far. I've been putting in $100-150 a week, and I should have over 600 by the end of the week. Earning money sucks when you're 16 but I'm trying hard.

Thinking of reverting my car back to DBs and justing waiting for an opportunity to snatch me a set of euro bumpers.

Some opinions would be much appreciated.

Do it. Euro bumpers are better than plastics on an early model especially without a rear valance. And powdercoat them matte black when you paint your car it'll look amazing.

[ohthejosh]

Do it. Euro bumpers are better than plastics on an early model especially without a rear valance. And powdercoat them matte black when you paint your car it'll look amazing.

Yea i feel the same way but its damn near impossible to find a set. I keep dreaming of stumbling into a pick and pull one day and find a good set LOL

[Vivek]

Isn't someone in SoCal selling a set for like $350?

[kronus]

only if the engine is not free flowing. the exhaust should be pulling the air into the cylinders on the intake stroke. but either way is very very low tension in compared to the 2 major compression strokes.

exhaust valves are closed during the intake stroke... (and yeah, it's low tension comparatively, i'm just arguing :p)

[ohthejosh]

Isn't someone in SoCal selling a set for like $350?

I think its damaged in the rear and the fronts been taken already. Ima see if my buddy in london can find me a set.

[Cabriolet]

exhaust valves are closed during the intake stroke... (and yeah, it's low tension comparatively, i'm just arguing :p)

i believe the exhaust valve is open for 26.7% of the intake stoke.

[Vivek]

Eric do you have comprehensive on your car?