Groub buy on treehouse racing adapters?

[SpecM]

After talking to the guys at Treehouse they said that the 320i booster will accept my 325i mc, and that the e36 cam swap is to use a vanos intake cam and move the intake to exhaust. Then get the $349 Turner chip which will put me around 250chp.

-Mmm that sounds too high... hp-wise...

[SchnellerVert]

More likely 210 cwhp, on a really good day.

[Mr.SWISS]

The M50 is rated at 192crank hp factory, with the cam it gets 30 more and a chip tuned for cams adds 22hp. So 240-250 isn't unrealistic. I found the info on the non vanos M50 cam swap :

We spoke with Pete McHenry of Precision Performance in Winston-Salem, North Carolina. McHenry is a well-known expert on BMW engine swaps and parts interchangeability. He advises: The M50 2.5-liter VANOS cams are 228-degree duration, while S53 3.2-liter M3 cams are 252 intake and 240 exhaust. They fit fine and give a nice boost to the top end on a 2.5-liter M50. You can use the S52 cams with the M50 lifters and springs. The S52 uses smaller lifters (33mm vs. 35mm diameter) and conical valve springs with teeny retainer washers. Net saving with this stuff is 20 grams per valve. Get the S52 cam trays, lifters and springs if you can but the swap is OK with cams only as mentioned earlier. If you have a 1992 M50, you can switch the intake cam to the exhaust. Timing is 240 on both, but the intake has 9.7 lift vs. 9.0. Buy a 252 Schrick intake cam and you have the same cams as an M3 and only have to buy one camshaft.

[SchnellerVert]

Maybe on a neu engine but not a 100k engine. Stu would have honestly probably have gone this route also instead of his custom built engine.

Now what you talk off is a good increase for cheap money you can't just add the numbers up like that it doesn't work.

[Mr.SWISS]

Maybe on a neu engine but not a 100k engine. Stu would have honestly probably have gone this route also instead of his custom built engine.

Now what you talk off is a good increase for cheap money you can't just add the numbers up like that it doesn't work.

Meh I beg to differ. An engine that has been in service for a while will likely make more than one freshly built since: A.) rings will be set and B.) it will spin more freely since it is broke in. My 140k mile m20 put down the same 0-60 time as stated in the C&D test article printed in 89.

All in all I have been dreaming of doing this swap since I got my car 4 years ago. No timing belt to break ...again, DOHC, waaaay more power potential with simple upgrades, and it is quieter/more reliable.

[mazur]

Meh I beg to differ. An engine that has been in service for a while will likely make more than one freshly built since: A.) rings will be set and B.) it will spin more freely since it is broke in. My 140k mile m20 put down the same 0-60 time as stated in the C&D test article printed in 89.

All in all I have been dreaming of doing this swap since I got my car 4 years ago. No timing belt to break ...again, DOHC, waaaay more power potential with simple upgrades, and it is quieter/more reliable.

I think common thought is that our engine's reach their peak in life at around 60k miles.

[matt]

I think common thought is that our engine's reach their peak in life at around 60k miles.

Even so... 250 crank HP from an NA 2.5 isn't happening with just a chip and cams.

[SchnellerVert]

Even so... 250 crank HP from an NA 2.5 isn't happening with just a chip and cams.

Because if it did BMW would of offered this to us like they did with the E46 330ZHP vs a standard 330i.

Ask Permit how much his 2.8L makes or any other BFc guy that has dyno their's and posted the chart.

Granted you will see more but you are not going to gain 58 hp from cams and a chip.

I see no mention of Fuel or MAS that's larger. You will need fuel to support these numbers and the 17.5 lb injectors will not do that.

http://forums.bimmerforums.com/forum/showthread.php?t=478545

[FredK]

SchnellerVert is right. You don't just add dyno numbers.

The M50B25 is capable of nice numbers. You won't be at 250 crank HP, but you can probably get to around 230 crank HP. The upgrade does get you a lot of power up top, and would be a great complement to the E30 chassis.

Please don't get caught up in dyno or crank HP numbers.

[Mr.SWISS]

SchnellerVert is right. You don't just add dyno numbers.

The M50B25 is capable of nice numbers. You won't be at 250 crank HP, but you can probably get to around 230 crank HP. The upgrade does get you a lot of power up top, and would be a great complement to the E30 chassis.

Please don't get caught up in dyno or crank HP numbers.

Well it will be bone stock for the conversion(maybe do the fly), After I get it straightened out I will start modding, first will be underdrive pulleys and ssk. Anyone heard that underdrive pulleys are bad with a lightened fly?

[matt]

Well it will be bone stock for the conversion(maybe do the fly), After I get it straightened out I will start modding, first will be underdrive pulleys and ssk. Anyone heard that underdrive pulleys are bad with a lightened fly?

Not true.

The "common knowlege" used to be that you shouldn't use a crank pully with a lightweight flywheel because you'd loose all your crank vibration damping.

FALSE.

You shouldn't use a crank pully at all, it will make your motor eat itself. Lightweight flywheels are fine. And lightweight flywheels are fine with underdrive accessory pullies.