Bennoz Supercharged GR project
Posted: Tue Sep 20, 2005 4:50 pm
Ok folks, I've talked about it here and there in bits - I may as well give you the full run down.
As you can guess Im putting a blower onto an FTO motor...
Main reasons why I didn't go turbo:
10-15k to get it done right
No-one has sucessfully done supercharging before (without explosion!)
I think this can be done to within a sensible budget - and I beleive this can be blueprinted & kit made.
Some of you may have read about a prior explosion I had doing this... Yes, And No, I dont want to talk about it ($$$
$$$$ $$$) Wrong calculations resulted in FAR too much poundage.... Destroyed every conceivable peice of engine.
So, I'll give you a run down - the unit Im using is a Swedish made Opcon Autorotor 2087. Here are the specs on it (currently being organised by Sprintex in WA.)
Displacement 0.87 Litres / 53 Cubic Inches / revolution
Max Air Flow 215 Litres / second; 460 Cubic Feet / min
Dimension Lenght: 245mm; Width: 157mm; Height: 103mm
Suited for engines producing upto 250kw
The unit will look very similar to this:
And here's a nifty blower calculator tool for those sizing one up for themselves: http://www.sprintex.com.au/BlowerCalcul ... ulator.xls
Plan A:
The unit is being bolted onto a 6A12 NON MIVEC engine which is coming from QLD (thanks Jeff!) As you may or may not know a supercharger is a belt driven device, unlike a turbo which run off gases. Therefore the unit needs to be mounted with the pulley end inline with the existing pulley system of the FTO. So it will sit just infront of the inlet manifold horizontally. I'll have to pull of the existing harmonic balance pulley & weld the supercharger drive pulley onto it, then have it re-balanced.
The piping will then be fabricated - inlet (with pod filter) into the unit, the outlet then plumbed into the intake manifold. The intake manifold will be basically gutted (the runners etc) all come out. The beauty of all this is that my nice RPW extractors remain untouched!
The amount of poundage is governed by the size of the pulley on the supercharger. The smaller the pulley the more poundage (think push bike gears on the rear wheel) First run we will be running no more than 5 psi.
Fuel air is mix is governed by a piggyback Unichip, Malpassi FPR & some minor fuel rails mods.
Estimated output of Plan A is about 180kw - but more importantly approx 320 Nm of torque (Remember - In Engineering terms - torque is the ability to accelerate - NOT Kw's.)
The above combo would make a suitable kit for sale around the 4k mark.
Plus install of maybe 2k.
Plan B (Hehehe
)
Same as Plan A but.... the block comes apart.
Heads go to RAMS head service in Windsor - to be polished and oversize valves put in (no porting as we want the air to remain dense & cold through smaller ports.) The block goes off to have the crank wedged & nitrided. The rods get sent to PAR Engineering to have billet units made & billet flywheel done. Motor is then blueprinted & reassembled.
A Water to air intercooler installed and the charger is then wound up to 15 + Psi. Big injectors go in with bigger capacity fuel pump.
But thats the 15 grand version....
Issues still to be resolved with both Plan A & B:
Diff - still looking into LSD which will be a must
Bonnet mods - We THINK it'll fit... wont know till the lid goes down
Brakes - may need a visit to UAS for that kit...
Engineering - hopefully all my mates I went to uni with are still in the Mechanical Engineering industry!
Sticking with Plan A to start with, this should take me about 4-5 months to get running. As soon as I have some piccies of interest I'll post them up. Feel free to ask any questions, cause Im bound to have left half of it out of this post.
As you can guess Im putting a blower onto an FTO motor...
Main reasons why I didn't go turbo:
10-15k to get it done right
No-one has sucessfully done supercharging before (without explosion!)
I think this can be done to within a sensible budget - and I beleive this can be blueprinted & kit made.
Some of you may have read about a prior explosion I had doing this... Yes, And No, I dont want to talk about it ($$$
$$$$ $$$) Wrong calculations resulted in FAR too much poundage.... Destroyed every conceivable peice of engine.So, I'll give you a run down - the unit Im using is a Swedish made Opcon Autorotor 2087. Here are the specs on it (currently being organised by Sprintex in WA.)
Displacement 0.87 Litres / 53 Cubic Inches / revolution
Max Air Flow 215 Litres / second; 460 Cubic Feet / min
Dimension Lenght: 245mm; Width: 157mm; Height: 103mm
Suited for engines producing upto 250kw
The unit will look very similar to this:
And here's a nifty blower calculator tool for those sizing one up for themselves: http://www.sprintex.com.au/BlowerCalcul ... ulator.xls
Plan A:
The unit is being bolted onto a 6A12 NON MIVEC engine which is coming from QLD (thanks Jeff!) As you may or may not know a supercharger is a belt driven device, unlike a turbo which run off gases. Therefore the unit needs to be mounted with the pulley end inline with the existing pulley system of the FTO. So it will sit just infront of the inlet manifold horizontally. I'll have to pull of the existing harmonic balance pulley & weld the supercharger drive pulley onto it, then have it re-balanced.
The piping will then be fabricated - inlet (with pod filter) into the unit, the outlet then plumbed into the intake manifold. The intake manifold will be basically gutted (the runners etc) all come out. The beauty of all this is that my nice RPW extractors remain untouched!
The amount of poundage is governed by the size of the pulley on the supercharger. The smaller the pulley the more poundage (think push bike gears on the rear wheel) First run we will be running no more than 5 psi.
Fuel air is mix is governed by a piggyback Unichip, Malpassi FPR & some minor fuel rails mods.
Estimated output of Plan A is about 180kw - but more importantly approx 320 Nm of torque (Remember - In Engineering terms - torque is the ability to accelerate - NOT Kw's.)
The above combo would make a suitable kit for sale around the 4k mark.
Plus install of maybe 2k.
Plan B (Hehehe
)Same as Plan A but.... the block comes apart.
Heads go to RAMS head service in Windsor - to be polished and oversize valves put in (no porting as we want the air to remain dense & cold through smaller ports.) The block goes off to have the crank wedged & nitrided. The rods get sent to PAR Engineering to have billet units made & billet flywheel done. Motor is then blueprinted & reassembled.
A Water to air intercooler installed and the charger is then wound up to 15 + Psi. Big injectors go in with bigger capacity fuel pump.
But thats the 15 grand version....
Issues still to be resolved with both Plan A & B:
Diff - still looking into LSD which will be a must
Bonnet mods - We THINK it'll fit... wont know till the lid goes down
Brakes - may need a visit to UAS for that kit...
Engineering - hopefully all my mates I went to uni with are still in the Mechanical Engineering industry!
Sticking with Plan A to start with, this should take me about 4-5 months to get running. As soon as I have some piccies of interest I'll post them up. Feel free to ask any questions, cause Im bound to have left half of it out of this post.
