3.3L s50???

[Colicious]

i am also wanting to do a project car like this. im lookin for around 400hp at the wheels (atleast). sounds like it all i would need is a s52 and some forged rods and lower compression pistons and a nice turbo.

[trent]

Re: 3.3L s50???

So how do you get a 3.3L out of an s50 or s52??? no one seems to be able to tell me!!!

i know the thread has gone elsewhere, but to give you another option to look at is the possibility that the people with 3.3's are using alpina cranks. alpina has been using a 93.8mm stroke since the M52TU engine which would yield 3.3 almost exactly with a 86.4mm bore.

If you guys want to be real heros why not have your S52 cranks offset ground for more stroke? This is a fairly common practice when stroker cranks are not available.

[SpencerM3]

i have done my reasearch.... you should check out bf.c forced induction section.... the euro sport twin screw is producing less power than eurosport claims and only at mild boost levels(less than 15 psi)... its just not an option for me.... i would not be satisfied with even 400 at the crank... for some poeple the TS is the right choice but not for me...

and charlie....i dont see why people say things like that.... like just cuz its an e30 it will never be fast.... i bet in less than 3 years i will have an e30 with 500rwhp and it will be as relyable as any other car.... its all in the design and the quality of parts used

I have tons of posts at BFC and have read each and every post on the twin screw, as well as speaking to Neil (M Coupe Beta tester) in person and conversating with Josh McMurray (Eurosport Owner).

The numbers I posted were entirely accurate. That is what they produced on the dyno. Now, there is another Twin Screw'd 325is, produced by Steve (stimpee) that is not making as much power, but then again, its a 2.5l.

Anyways, I dont want to bicker over numbers anymore, but this kit has/can/will produce "turbo like" numbers. Just need to wait for the damn thing to be released.

Good luck with your turbo project. I would definetly suggest a taller rear raito. The short rear ends that come in these E30's aren't too ideal for building boost in the lower gears.

[BeirBrennerE30]

Re: 3.3L s50???

So how do you get a 3.3L out of an s50 or s52??? no one seems to be able to tell me!!!

i know the thread has gone elsewhere, but to give you another option to look at is the possibility that the people with 3.3's are using alpina cranks. alpina has been using a 93.8mm stroke since the M52TU engine which would yield 3.3 almost exactly with a 86.4mm bore.

If you guys want to be real heros why not have your S52 cranks offset ground for more stroke? This is a fairly common practice when stroker cranks are not available.

Thats where HIOP gets they cranks... they offset the us s50 and s52 cranks.... the problem is after that you definately need custom rods...

[gstuning]

If I where looking at making 500rwhp I would simply find a M30 3.5 motor,
M5 trans, M5 clutch,,
turbo on that and your good to go

or simply stick a M104 engine( E23 745i ) in there , stock 252hp with 6psi at top 9psi at mid range, now that is cheap power, turbo can handle 600hp along with the rest of the unit

My buddy just installed a 745i engine in his E24 6er, running it in at 6psi and has taken it to 1bar , , I haven´t ridden in it yet tough,, his final goal is 450hp wich is just a knob turn away

new motors are good but old are cheap and easy to build and mod
My friend Saku of Finland wich used to have a turbo M50B25 in his car(10psi 374hp)
now has a twin turbo S38 engine in it, 0.25 bar(3.6psi) made 450hp
S38´s own when it comes to eating forced induction
My euro S50b30 and 10psi = 500hp,,

I suggest either M30 or S38 turbo

[BeirBrennerE30]

If I where looking at making 500rwhp I would simply find a M30 3.5 motor,
M5 trans, M5 clutch,,
turbo on that and your good to go

or simply stick a M104 engine( E23 745i ) in there , stock 252hp with 6psi at top 9psi at mid range, now that is cheap power, turbo can handle 600hp along with the rest of the unit

My buddy just installed a 745i engine in his E24 6er, running it in at 6psi and has taken it to 1bar , , I haven´t ridden in it yet tough,, his final goal is 450hp wich is just a knob turn away

new motors are good but old are cheap and easy to build and mod
My friend Saku of Finland wich used to have a turbo M50B25 in his car(10psi 374hp)
now has a twin turbo S38 engine in it, 0.25 bar(3.6psi) made 450hp
S38´s own when it comes to eating forced induction
My euro S50b30 and 10psi = 500hp,,

I suggest either M30 or S38 turbo

s38 would be a dream but its hard to get it the us... in 3.8L form that is.... also its a tight fit in the e30 and swap info is hard to come by....someday id love to do it but there is just something about the s52...mabey the next car will have an s38

[e30Matt]

If I where looking at making 500rwhp I would simply find a M30 3.5 motor,
M5 trans, M5 clutch,,
turbo on that and your good to go

or simply stick a M104 engine( E23 745i ) in there , stock 252hp with 6psi at top 9psi at mid range, now that is cheap power, turbo can handle 600hp along with the rest of the unit

My buddy just installed a 745i engine in his E24 6er, running it in at 6psi and has taken it to 1bar , , I haven´t ridden in it yet tough,, his final goal is 450hp wich is just a knob turn away

new motors are good but old are cheap and easy to build and mod
My friend Saku of Finland wich used to have a turbo M50B25 in his car(10psi 374hp)
now has a twin turbo S38 engine in it, 0.25 bar(3.6psi) made 450hp
S38´s own when it comes to eating forced induction
My euro S50b30 and 10psi = 500hp,,

I suggest either M30 or S38 turbo

http://www.cardomain.com/id/pphilpot02

[trent]

Re: 3.3L s50???

Thats where HIOP gets they cranks... they offset the us s50 and s52 cranks.... the problem is after that you definately need custom rods...

How and why is this a problem? If you want to make that much power, you should be using custom rods anyway. Pauter would easily supply rods however you like.

[kylebes1]

I am not sure if everyone has looked at this link, but I feel it is a great source for those of you wanting to do the m30 or s38. I have a friend who is not only a great BMW mechanic but did the m30 swap himself.

He simply has the m30 b35 with a rebuilt head, which he also had shaved down to make 9.3:1 compression. Obveously if you want a turbo engine you would not di this. Considering the m30 b35, maybe just the early ones, had an 8:1 compression ratio and are generally built proof, I would say they make a perfect engine to start a turbo project.

The only thought that comes to mind for me is that it will add some weight. And unless you want to modify the firewall and push it back about 6 cm you will bo balanced more toward the front.

the e23 745 version was named the M102 and was built from 84-86

[kylebes1]

Can anyone answer me this, how large can i get my m50tu? I am willing to do it all, may as well.

[BeirBrennerE30]

Re: 3.3L s50???

Thats where HIOP gets they cranks... they offset the us s50 and s52 cranks.... the problem is after that you definately need custom rods...

How and why is this a problem? If you want to make that much power, you should be using custom rods anyway. Pauter would easily supply rods however you like.

its not a problem... it was just mentioned that stock rods are pretty beefy so i mentioned if you did do a stroker that you couldnt use stock rods anyway so its a moot point...


as for the m52tu.... how do you like it??? you notice the dual vanos at all and how is it compares to the single vanos variant...

i always considered an aluminium block m52 bored and stroked to 3.2L+ with the m52tu head the ultimate variant for the m50... i could be wrong though...

[DrMcDave]

if i recall correctly the biggest diplacement you can go with the m52 aluminum is 3.1. I don't think you can bore it out because the block is sleaved with something. If you are going to boost the engine i think you'd want to use the 2.9 variation. not 100 percent on this but i am pretty sure.

[kylebes1]

I thnk if the engine was Double VANOS you cannot put the single Vanos head on it.

[SpencerM3]

No M52's had double vanos.

I think you guys are thinking of the M54 in the E46 cars.

[kylebes1]

the last of the m52s had double VANOS, they were still 2.8 liters so BMW still called tehm m52, I thnk that these were the m52tu