I'm thinkin M50 2.8 stroker... ??

[emmanuel.dlc]

do it!!!



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[Wanganstyle]

i just finished swapping it to my new sedan, i will let you know the numbers when i setup the WAR.

im hoping for 225-230.. lets see..

last time it did 210 and 195wtq with a 413 with a mild chip so i still have some room for improvement.

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What fuel did you run on?
What kind of dyno is that from? What did your baseline engine dyno at and what does a stock M52b28 do on your dyno?

Which camshaft and exhaust setup are you running?

Did you check with clay the piston tops at max valve lift?
\

quite interested in your project, have a spare set of M50TU (94 vanos 325) pistons and a M52 engine that will eventually need a rebuild... and some more compression would be nice. but then I'd like more cam and higher RPM range :)

Have you drag raced the car to see any differences in trap speed?

[emmanuel.dlc]

all runs were on 91oct.

the dyno is a dynojet, for comparison a m202.7i with 288cam and chip/exhaust made 161whp on the same dyno and also a e30s50 with software made 210whp. i will try to find a stock b28 to get a baseline and check readings. but seems very accurate.

the camshafts are s50 and exhaust is ebay long tubes to 2.5 Ypipe to single 2.5 all the way to a single 2.5 in/out magnaflow.

i did not check the clearances with clay but the final rotating assembly height was 209.55 so the pistons are sitting .45 under the deck so no clearances issues whatsoever.

used m52 crank/rods and 93+ m50tu pistons. stock HG, stock MAF (idk if 3.5 will do anything there) and 21# pinks. haven't tracked it but i will eventually see the numbers. sadly i will have nothing to compare but well.

i noticed that you quoted me on the older post, did you see the new dynosheet?



the car made 225hp and 199tq at 13.2~ afr, all runs on 3rd g260+373.lsd

last time is made 204hp and 188tq at 14.5~ afr so it picked up 21hp/11tq with the WAR.i think it should break the 230's with a better tune. that'll put a smile on my face

but give me your opinion, whats an ideal afr for the 24v's and timing degree for them n/a? im still learning but WAR is not helping with the way it tunes.

[MrToSlo]

all runs were on 91oct.

the dyno is a dynojet, for comparison a m202.7i with 288cam and chip/exhaust made 161whp on the same dyno and also a e30s50 with software made 210whp. i will try to find a stock b28 to get a baseline and check readings. but seems very accurate.

the camshafts are s50 and exhaust is ebay long tubes to 2.5 Ypipe to single 2.5 all the way to a single 2.5 in/out magnaflow.

i did not check the clearances with clay but the final rotating assembly height was 209.55 so the pistons are sitting .45 under the deck so no clearances issues whatsoever.

used m52 crank/rods and 93+ m50tu pistons. stock HG, stock MAF (idk if 3.5 will do anything there) and 21# pinks. haven't tracked it but i will eventually see the numbers. sadly i will have nothing to compare but well.

i noticed that you quoted me on the older post, did you see the new dynosheet?



the car made 225hp and 199tq at 13.2~ afr, all runs on 3rd g260+373.lsd

last time is made 204hp and 188tq at 14.5~ afr so it picked up 21hp/11tq with the WAR.i think it should break the 230's with a better tune. that'll put a smile on my face

but give me your opinion, whats an ideal afr for the 24v's and timing degree for them n/a? im still learning but WAR is not helping with the way it tunes.

i'm planning to build a stroker motor and found the info here very useful. i have an m52b28 crank, rods and m50tu pistons ready to go with an m52 block and head.


my only question is do i use the stock 1.75 mm (0.07 in) head gasket or go with a 0.7 mm (0.03 in) head gasket?


i'm inclined to believe it's the stock 1.75mm since that's what you posted, but i also found someone stating that the 0.7mm (0.03 in) is needed for the 11:1 compression ratio.


can someone verify?

[fedesagol]

I did some calcs.

m52b28 crank and rods
m50tu pistons
1.75 HG
11.2 CR

m52b28 crank and rods
m50tu pistons
0.75 HG
12.9 CR

m52b28 crank and rods
m52b28 pistons
0.75 HG
11.6 CR

I hope they are right.
where do I find a .03" HG for a m52??

Fede

[vabbster]

I did some calcs.

where do I find a .03" HG for a m52??

Fede

http://store.vacmotorsports.com/vac---m52tu--m54-multi-layered-steel-head-gaskets-mls-p1072.aspx

[10Toes]

M52B28 crank & rods

Left=M50tu piston_____Right=M52B28 Piston

[10Toes]

do it!!!



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Good to see an actual dyno of this setup when it is tuned right. That is some nice power.

[fedesagol]

http://store.vacmotorsports.com/vac-...mls-p1072.aspx

Will the m52TU head gasket fit in a M52 block?

thanks for the reply!
Fede

[10Toes]

Will the m52TU head gasket fit in a M52 block?

thanks for the reply!
Fede

No, that is for a double vanos engine and will not work on a single vanos block as the coolant/oil passages are not in the same locations.

[vabbster]

No, that is for a double vanos engine and will not work on a single vanos block as the coolant/oil passages are not in the same locations.

You are right, the M52tu is different. Vac offers an MLS gasket for the M50/52 as well but it looks like they only go as low as .070"... They make custom thickness gaskets for the S50/52 engines so they might be able to make one for an M50/52 as well.


Fedesagol,

Email Vac if you want a .03" gasket. They might be able to help.