B32 vs b34 bottom end

[bimmerboy]

I've got a hankering for some serious hp since i just got back from cruising the "pike"(no racing for us, just observering, it really looked like something out the fast and the furious to be honest) So I'm planning on a m30 build but with stock parts. Right now I've got a b32 in my garage and i was thinking on maybe using that, with a b35 head/intake and the b32 cam, along with some oil sprayers. This would give me a around 8:1 cr I think, but since it's only a 3.2 i'm wondering if a b34 bottom end would be nicer off boost and would allow more boost. I'm going with the b35head/b32 cam either way, unless the lower lift of the cam is actually more limiting than the duration of the b35 cam?, and then MS for ecu, a custom tubular manifold if I can't afford a TCD one, and a Holset turbo with an air-air IC(probably with no a/c). What bottom end would allow more power?

Thanks

[wjones]

Or you could just buy this turbo motor and be ahead.

[bimmerboy]

well thats no fun

[rob535i]

The B32 pistons in the B32 block yeild a CR of 8.8:1, By bolting on the head of a B35 you will lower the CR a little. I would say that you would end up with a CR closer to 8.5:1

If you were to use the pistons from a B34/5 you will need to bore your block out to 92mm to fit the pistons. the 3.3 block has a bore of 86mm I think. The rods and crank are the same between the engines. The pins that hold the piston to the rod are shorter for the B35 pistons then the B32 ( not sure yet on the B34, I Think the pins between the B32 and B34 are the same. )

THe cheapest may be for you to refresh the bttom ond of your B32 and add the B35 head w/B32 cam, That is the way O would go..

[Rich Euro M5]

I believe Jimmy G has the right combination for low cost. M30 block using a M30B35 head with flat top VW pistons. However rather than start with a B35 block I'd use the B34 block which would require boring. Although the machine work would add some incremental cost, you would be assured of having the correct piston / cylinder clearances. Flat top pistons with the M30B35 head would yield something around 8.5:1 maybe a little higher. I would also use the M30B35 camshaft for the added lift and duration. This camshaft works very well with turbocharging.

Just my $.02

Rich

[Rich in Tupelo]

For what it is worth, a shop in Memphis is using B35 (E32) blocks and the heads from the B32 (533,633,733) motors with very good results.

[chrism]

Which pike have you been cruising?

I've got a hankering for some serious hp since i just got back from cruising the "pike"(no racing for us, just observering, it really looked like something out the fast and the furious to be honest) So I'm planning on a m30 build but with stock parts. Right now I've got a b32 in my garage and i was thinking on maybe using that, with a b35 head/intake and the b32 cam, along with some oil sprayers. This would give me a around 8:1 cr I think, but since it's only a 3.2 i'm wondering if a b34 bottom end would be nicer off boost and would allow more boost. I'm going with the b35head/b32 cam either way, unless the lower lift of the cam is actually more limiting than the duration of the b35 cam?, and then MS for ecu, a custom tubular manifold if I can't afford a TCD one, and a Holset turbo with an air-air IC(probably with no a/c). What bottom end would allow more power?

Thanks

[bimmerboy]

Well First off if I were to go to a b34 i would just find another block, but 8.5 seems a little high for lost of boost, so that doesn't look promising. And what is the advantage of the VW pistons over the b34, seems like they both have the same CR. Has anyone ever pushed the b32 cam to its limit, I was questioning whether its lift would limit it from more power over the b35, but it seems to excite the upper half of the rev band(bigger HP?). And I cannot see using the b32 head over a b35, the b35 is far superior correct?

Oh and Chris that would be the Berlin, but I'm not sure how far we were to your lot.

[clevertd]

and a Holset turbo with an air-air IC(probably with no a/c).

Doesn't TCD make a T4 manifold, whereas the Holset is a T3?

[T_C_D]

Oh and Chris that would be the Berlin, but I'm not sure how far we were to your lot.

Chris and I terrorized that strip several years ago. Turbo e28s used to be common place there.

Todd

[bimmerboy]

The HY holsets are t3s, the HXs may be t4s i dont know, but the manifold can be changed correct?

And Todd, I'd love to start terrorizing it myself, but it may be in a e34 touring instead(i know i know, but I just love me a fast black wagon) but who knows, the swhwarz 533i I look at every morning, that I got the b32 from, does look so very good, and I'd love to represent the e28. since I do love it.

But Todd with your experience will the b32 cam make 500whp? and what about the b32 bottom end? I think I'm leaning towards the b34 now, but that b32 I have is in real good shape and low mileage..

[Flip_Side_the_Pint]

The HY holsets are t3s, the HXs may be t4s i dont know, but the manifold can be changed correct?

The HY series holsets have a open tang t3 turbo inlet flange (the HY's have a smaller turbine housing thus its open tang turbine inlet, you'll often find these on automatic dogde truck). While all other HX's are split pules t3 and t4. So you can get HX series turbos with t3 flanges however they will be split pulse divided entry turbos, or sometimes referred to as "t31".

[Mike-TurboE24]

Or you could just buy this turbo motor and be ahead.

I can't get to bimmerforums from work. Is this motor still available? Please reply back or email. Thanks.

Mike

[Skeen]

Or you could just buy this turbo motor and be ahead.

I can't get to bimmerforums from work. Is this motor still available? Please reply back or email. Thanks.

Mike

Yup, looks like it's still for sale and a decent deal if you need a motor to start your project. For the same price though, you could get a nonIC setup from TCD with lots of nice new parts to bolt on your existing setup. I'd give you the e-mail addy of the seller, but it's not in the thread, you have to go to BF.c and fill out the e-mail form.

[Mike-TurboE24]

Or you could just buy this turbo motor and be ahead.

I can't get to bimmerforums from work. Is this motor still available? Please reply back or email. Thanks.

Mike

Yup, looks like it's still for sale and a decent deal if you need a motor to start your project. For the same price though, you could get a nonIC setup from TCD with lots of nice new parts to bolt on your existing setup. I'd give you the e-mail addy of the seller, but it's not in the thread, you have to go to BF.c and fill out the e-mail form.

I am looking at a complete re-build for my current motor due to blown headgasket. Head, turbo, possible bottom end as well. Thanks for checking. I can't log into b'forums from where i am.

[Flip_Side_the_Pint]

isn't the S1 TCD kit alittle more expensive then that entire outfit?

[clevertd]

TCD is $25 more.

[T_C_D]

Mike,

Give me a call at 614-734-1422. I have 5 or 6 good m30s in the shop that you could have for almost nothing with purchase of a turbo kit.

Todd