ECUTune Stage III twin screw supercharger sign up

[SVXRide]

Michael,
Very nice! Are you going to do your own TIG welding?
-Bill

[longassname]

Originally Posted by SVXRide

Michael,
Very nice! Are you going to do your own TIG welding?
-Bill

Thank you, yes I will be doing the TIG welding. I need to buy some supplies for that still too. Most of our seams are 1/8 to 3/16 joints which require a weirdish thickness 4043 filler that isn't normally stocked by most welding supply shops.

[longassname]

I forgot to take the camera with me to the shop today. I did finish the bottom pieces for the rest of the manifolds and I fit up the supercharger with one of the new, shorter drive snouts. I had to mill some off of the black cast iron alternator bracket to line it up right. Speeking of which, I need the cast iron alternator brackets now.

[longassname]

I've been spending a lot of time the last few days tooling up and procuring stock for some more changes/improvements I've decided on.

There is plenty of space in front of the crank pulley and machining a new one will let us make a few very worthwhile improvements. 1st off we can make it smaller. This will allow us to use a smaller drive pulley on the supercharger without running more manifold pressure than the engine wants. Running a smaller drive pulley on the supercharger improves our hood clearance. This opens the way for the second improvement we can make by machining new pulleys. We'll also be machining a new power steering pulley and we'll be making it and the spot on the crank for that belt 6 ribs so that we can use a 6 rib belt on the supercharger.

The 3rd and biggest improvement is we can add another belt. I'm expanding the crank pulley to hold another 5 rib belt which will drive the alternator instead of pulling the 4 rib belt from the ac compressor down to it.

The alternator will now be mountind directly below the crank pulley in a mounting assembly which incorporates the mechanism for tensioning the belt. There are 2 plugs on the bottom of the pump which would make an excellent place to bolt the alternator assembly if only there were bolts there--I'm machining new plugs which will have bolts holes in them.

While most of my time has been spent measuring and ordering and picking up I do have a little bit of physical progress to show. I drew the discharge flange templates, cut them out, and glued them plates which I got cut to the correct size by the supplier.





These changes are expensive for us but I think will make for a much better kit. If nobody has any complaints I'd like to cut the walboro fuel pump from the kit in order to recoup some of the losses since it isn't necessary and the installation is unpleasant to say the least anyway.

[Jnthn_Sctt]

Originally Posted by longassname

These changes are expensive for us but I think will make for a much better kit. If nobody has any complaints I'd like to cut the walboro fuel pump from the kit in order to recoup some of the losses since it isn't necessary and the installation is unpleasant to say the least anyway.

If it improves the project I certainly have no objections to what you're doing. Just hope not changing the pump doesn't effect drivablity. Thanks for keeping us up to date Mike.

Jonathan

[longassname]

Originally Posted by Jnthn_Sctt

If it improves the project I certainly have no objections to what you're doing. Just hope not changing the pump doesn't effect drivablity. Thanks for keeping us up to date Mike.

Jonathan

Thanks,

No, the stock fuel pump is plenty big for the amount of boost that can be run on an unbuilt engine. I won't be including it as part of the kit in the future. If anyone who preordered demands it I'll include it for them but otherwise will leave it out and we'll all be the healthier for not having to fish around the gas tank.

[Jnthn_Sctt]

Originally Posted by longassname

Thanks,

No, the stock fuel pump is plenty big for the amount of boost that can be run on an unbuilt engine. I won't be including it as part of the kit in the future. If anyone who preordered demands it I'll include it for them but otherwise will leave it out and we'll all be the healthier for not having to fish around the gas tank.

No worries, I'm no engineer, so won't second guess your decisions.

Thanks again,

Jonathan

[mbtoloczko]

Originally Posted by longassname

...I'll show the timing maps first as it is easier to understand and a cleaner looking map in the factory form. The SVX uses both a lot and very little timing due to the engines design. The ignition timing map goes all the way from 50 degrees at high rpms and low load to 0 degrees at low rpms and high load. Here's the factory timing map:...

Which sensor readings are used by the ECU to determine the engine load listed on your plots? If you know the exact formula (e.g. load = a1*maf^a2*tps^a3...), I'd be curious to know.

[longassname]

I finished getting the 6061-T6 round for the pulleys today.




And I drilled and milled the discharge flanges.

[mikecg]

You got your thumb in the pictures.

[longassname]

Originally Posted by mikecg

You got your thumb in the pictures.

That's to show the Dr. how it goes back on in later phases of the project.

[longassname]

So anybody have any alternator brackets? That's the black cast iron piece with the engine pulling loop on it. I'm 3 shy on them.

[TomsSVX]

maybe.....

tom

[immortal_suby]

Originally Posted by longassname

So anybody have any alternator brackets? That's the black cast iron piece with the engine pulling loop on it. I'm 3 shy on them.

I think I still might have one.

[longassname]

Originally Posted by immortal_suby

I think I still might have one.

Now we are talking. Matt to the rescue again.