upsidedown twinscrew

[MACJXL]

Hey Ken,
I read in thread around here somewhere, of someone who installed a Lysholm/Whipple style 3.3L upside down with long intake runners down to the intake ports of the heads.
That idea really appeals to me, & I'd really like to explore what could work well in that configuration with regard to intercooler cores, & possibly LPG injection.
I'm thinking the long runners could inlude mixing vanes to ensure a homogenous air/fuel mix
Any chance of a .DXF of a 2,3L & 3.3L bolt pattern?
Better still, a 3d .DXF or .STEP of the housing so I can do some studies in AutoCrash?
Can't afford the big-boys toys like P/E just yet - maybe when I'm rich & famous :)
Mmmmm.... 500 cube LSX blocks...:love:

[Ken]

Hey Ken, I read in thread around here somewhere, of someone who installed a Lysholm/Whipple style 3.3L upside down with long intake runners down to the intake ports of the heads. That idea really appeals to me, & I'd really like to explore what could work well in that configuration with regard to intercooler cores, & possibly LPG injection.
I'm thinking the long runners could inlude mixing vanes to ensure a homogenous air/fuel mix Any chance of a .DXF of a 2,3L & 3.3L bolt pattern?
Better still, a 3d .DXF or .STEP of the housing so I can do some studies in AutoCrash? Can't afford the big-boys toys like P/E just yet - maybe when I'm rich & famous :) Mmmmm.... 500 cube LSX blocks...:love:

Sounds like someone may have seen one of the original conceptual design prototypes we cobbled up ... before the Stealth configuration.

I'll save you a heap of time & trouble ... it doesn't fit. In fact, the 2300 doesn't even fit. The width of the rotors and the cathedral ports make it all too tight ... unless the intake tract goes under the supercharger (i.e., out of the supercharger vertically up, u-turn down the outside of the rotors, under the rotors to the opposing head) in which case the hood would need a 100mm hump!
The vertical-up-discharge supercharger design is very common, in fact there have been more OE models designed this way than vertical-down-discharge. It is more common in 4-valve engines (GM Northstar, Mercedes, Ford etc), probably because the OHC means the superchargers can fit lower in the valley (no pesky cam/lifters to get in the way).
They typically use tubular intercooler cores like Laminova.

Good idea ... but not viable for a LS1/2.

[BlownVR]

Like this?
http://www.ls1tech.com/forums/showthread.php?t=557722

[MACJXL]

Similar to that BlownVR, but I'd prefer the hot compressed air to turn a corner before blasting the intercooler core fins.

Ken, did you try Laminova cores yourself? The design certainly looks innovative - are they effective?

What type of system is your best offering as a change-out manifold/cooler for a 2004 vintage Starr 2.3L on an LS1?

John

PS I'll take that as a no regarding the STEP file :stick:

[keen]

How Much The Wife Wan'ts To Know

[Ken]

Similar to that BlownVR, but I'd prefer the hot compressed air to turn a corner before blasting the intercooler core fins.
The width accross the rotors of a Lysholm 3300 is ~205mm.
The width of the supercharger in the link is ~168mm.


Ken, did you try Laminova cores yourself? The design certainly looks innovative - are they effective?
Tried, and also worked with Eaton and their team's data.
Although reasonably good heat extraction, the pressure drop (flow restriction)is significant. They are also very expensive and difficult to tool for. They have been used extensivley by Eaton in the past (Northstar etc) but not so much recently.


What type of system is your best offering as a change-out manifold/cooler for a 2004 vintage Starr 2.3L on an LS1?
We have not done anything with that product. The cost of R&D and setting up to convert for the few that are out there makes it unviable.


I'll take that as a no regarding the STEP file :stick:
Ummmm ... correct. ;)

[MACJXL]

We have not done anything with that product. The cost of R&D and setting up to convert for the few that are out there makes it unviable.


Is the Whipple housing & bolt pattern not identical to a 2300AX Lysholm housing that Harrop sells?
Does Harrop not offer an intercooled manifild for the Lysholm onto LS1 that would be compatible?
I'm quite (very) happy to change out the fugly "Twinkle" fuel rails if necessary to accommodate whatever is available.

J

[Ken]

Is the Whipple housing & bolt pattern not identical to a 2300AX Lysholm housing that Harrop sells?

Although we do stock & sell the Lysholm complete supercharger which is what Whipple previously re-badged, we have not made a manifold to suit the Lysholm bolt pattern.
The manifold we make suits the bolt pattern of our own twin-screw (TSK140) which is different to the Lysholm, as our twin-screw incorporates an integral bypass and has some unique geometry to improve it's efficentcy.