Don't laugh at me..M42 power

[nando]

For the record, my car didn't have an exhaust when I bought it. I think that you would gain a bit of torque with stock parts because of the increased back pressure. And I would argue that 19lb or 22lb 4-pintle injectors are a very worthwhile upgrade.

If you plan on autocrossing the car, check the rulebook to make sure the mods are legal. Stuff like the flywheel puts it way out of class.

backpressure does not give you torque.

[rThor432]

you'd be surprised what power steering will do to your interpretation of nose heavy

Yes, and skinnier tires. But the turn-in still doesnt feel as crisp as it did when I had the M20 without P/S. I've got another (quicker) rack going in when I get the chance. That should help too.

[FredK]

The best way to improve turn-in is to drop in that S14. :razz:

[KenC]

but that's assuming you don't shave down the M20 flywheel at all.. that could be another 5-10lbs there, depending on how far you go. AFAIK, you can't shave dual mass flywheels.

Yeah, that's dropping a stock M20 flywheel in there. You can easily get another 5-10lbs off of it. Or drop in an e21 323 flywheel. I think they're like 11lbs stock or something close to that.

[nando]

yeah, a 323 flywheel is basically a single mass B25 flywheel that was shaved from the factory.

[e30this]

an M20 single mass flywheel is definitely much lighter than an M42 dual mass.

I didnt say that did i?? Read before you post. I said "CLUTCH SETUP"

[nando]

I didnt say that did i?? Read before you post. I said "CLUTCH SETUP"

what's your point? The M20 combo will still be lighter especially after you shave it down.

[e30this]

My point is that it is a waste of time. You can shave the M42 flywheel just like you can the M20 flywheel and still be in the same place and spend less money.
When you go to the M20 clutch setup you have to spend the extra money to buy a new clutch kit 225 a new flywheel 100 surface 30 at most. Maybe shave it if you have someone who can do it correct with out having vibrations. Then buy a euro 323 TOB because the stock M20 one just wont work and they are another 50 depending on where you get them. So is it an advantage to do the swap?
Nope. Do you gain anything from it? Nope. Is it a waste of money? Yes.

[Liam]

But, you cant "shave" an M42 Flywheel.

Well, you could try to I guess.

And the gain is actually quite impressive.

[nando]

You can shave the M42 flywheel just like you can the M20 flywheel and still be in the same place and spend less money.

no, you can't. that's the point.

[e30this]

Why cant you? You must search for your info before you tell me Im wrong. I have read about it being done. I have heard about it being done. I have seen photos of it done. So why cant you? You just need someone to know what they are doing.

[nando]

because it's a twin mass. :roll:

somebody who knows what they're doing will tell you that they can't do it. you would have to shave 70% of the material off to make it as light as a shaved M20 flywheel, and then there would be nothing left..

[e30this]

You can shave a twin mass. It has been done. Search and you will find the info.
If you shave a M20 flywheel 8lb and shave an M42 flywheel 8lbs the whole flywheel and clutch setup between both is going to be the same. My point is if you put a complete M20 flywheel and clutch on a scale and do the same with the M42 it is the same weight. No savings at all.

[Liam]

You can shave a twin mass. It has been done. Search and you will find the info.
If you shave a M20 flywheel 8lb and shave an M42 flywheel 8lbs the whole flywheel and clutch setup between both is going to be the same. My point is if you put a complete M20 flywheel and clutch on a scale and do the same with the M42 it is the same weight. No savings at all.

Nobody in their right mind would do this and to shave a 28 pound twin mass flywheel to 8 lbs would only leave the spindle and springs.

EDIT: The total weight reduction switching to a stock m20 12lb flywheel and clutch is about 14lbs

[nando]

You can shave a twin mass. It has been done. Search and you will find the info.
If you shave a M20 flywheel 8lb and shave an M42 flywheel 8lbs the whole flywheel and clutch setup between both is going to be the same. My point is if you put a complete M20 flywheel and clutch on a scale and do the same with the M42 it is the same weight. No savings at all.

yeah, 8lb M42 flywheel.. not going to happen.