443 replies to this topic

[Kieran McC]

Anyone know what boost levels we see with the various pulleys 3.5(?),3.35, 3.1, 2.9?    I assume that the standard pulley (3.35") would see the boost sitting in the efficient range for the m62?

From memory I think CS use the 3.1as their standard pulley on a stage 2sc set up

[Scuffers]

How big is the crank pulley?

[Rosssco]

 

Anyone know what boost levels we see with the various pulleys 3.5(?),3.35, 3.1, 2.9?    I assume that the standard pulley (3.35") would see the boost sitting in the efficient range for the m62?

From memory I think CS use the 3.1as their standard pulley on a stage 2sc set up

 

 

The standard pulley size is 3.35" for stage 2, and a mapped for a 7k rm limit by CS. Smaller pulleys such as a 3.1" tend to be mapped with a lower rev limiter, typically 6.5k rpm, as this pulley size can bring some engines into the danger zone of ~270bhp (where rods can part company on a standard Z22SE..)

[Hopegreen]

How big is the crank pulley?

 

6.53"

 

At 7000rpm the m62 runs at 13644rpm with 3.35" pulley.  

[NickB787]

has anyone messed around with using a Saab turbo intake manifold, shifting the s/c down lower? and using a good water /air charge cooler? might be a project for winter?

[siztenboots]

is it the same as the VXR GTC , I have been looking at the DI head and the twin scroll turbo manifold setup , its the A20NFT (LHU)

[Exmantaa]

has anyone messed around with using a Saab turbo intake manifold, shifting the s/c down lower? and using a good water /air charge cooler? might be a project for winter?

 

The OEM SC manifold provides for the air intake ducting, the chargecooling and also supercharger mounting/allignment...

Replace for a Saab manifold (it does flow better for higher cfm's) and you will need to solve the other two functions. And I forgot the SC bypass operation. It's not easy...

(Did I mention that available space is very limited?)

 

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[FLD]

I tried with an M90.  I looked at mounting it low by the sump but it was still too tight.  I even put a short snout on a later M90 to generate more room but it didn't work.  The current system is packaged very well.

[oakmere]

Admit defeat put a larger pulley on the SC and enjoy driving it. Easier said than done.

[Exmantaa]

Or: Hack up an OEM SC mani and tap off the air flow through a separate water/air exchanger. That has been done, but your results may vary...

Edited by Exmantaa, 15 July 2014 - 02:41 PM.

[slindborg]

Admit defeat put a larger pulley on the SC and enjoy driving it. Easier said than done.

 

This... Stop chasing pub power numbers you fcuk nuggets

[Rosssco]

is it the same as the VXR GTC , I have been looking at the DI head and the twin scroll turbo manifold setup , its the A20NFT (LHU)

 

It's different I'm afraid. The Saab manifold (B207) has the TB located on top, whereas the later DI engines have the TB on the underside of the manifold. Not sure on relative TB sizes.

 

The bolt pattern for connection to the head is also different, so it won't bolt straight on without an adaptor plate (which I seen someone in the US has done).

[CHILL Gone DUTCH]

I had a thought today It's just a idea and just thought I would share it here , it might be stupid but here goes Has anyone thought of cooling the oil within the supercharger ?

[leevx2.2]

Not enough oil in it I would of thought .

[techieboy]

Snout cooler - http://stiegemeier.c.../venom-coolers/

[slindborg]

Snout cooler - http://stiegemeier.c.../venom-coolers/

 

 

soooo much detail there

[techieboy]

 

Snout cooler - http://stiegemeier.c.../venom-coolers/

 

 

soooo much detail there

 

 

There did used to be more information on that page, when I found it a couple of years ago. More info in the Stiegemeier forum and lots of discussion on various Cobalt/Saturn/LSJ based forums as to whether it's worth anything at all.

[slindborg]

unless the rotors are at something mad like 200degC (guess) then I really doubt there would be much transfer to the air.... ok it could soak the manifold and then soak the cooler water circuit but thats a little tenuous imho.

 

Its simple fizzicks of pushing more air than is needed into the manifold/engine

[fezzasus]

It's going to do F all.

 

You will heat air that you compress. It's dictated by physics. You can reduce this effect by making the process more efficient, but without moving to a different rotor design then you are stuck with a fixed efficiency. 

[CHILL Gone DUTCH]

Lee are you still using your sandwich plate lee? And have you done any trials with and with out ??