ls3/ls7 maf hole cover

[orion4096]

Thanks, but I won't have a use for it assuming the aluminum tubing that just came in the mail can be made to the right size spacers.

Here's a wickedrx7-style mount I made this morning.  If a larger pulley works, the pump will need to be moved to the right and maybe up to clear the idler pulley.

[orion4096]

Didn't get a chance to try the KRC pulley this weekend, but I did figure out how to make nice curves around all bolt holes in the cad program.  Made a newer bracket with the pump moved a bit up and to the right so a 6.5" pulley should clear.  Wedged the reservoir in about where it needs to be.  It needs a bracket and I don't have tig.  It'll probably end up being attached with the mig spool gun which sucks at doing aluminum.  Didn't feel like making a mess swapping the lines this weekend so it only got bolted up to check the belt offset.  Looks good.  Pez line will bolt right in to the AN fitting I bought.

[Mik3ymomo]

Subscribed.

If you get hung up on any one piece let me know and I will see if I can get something made by a couple sources I have.

- Mike

[digitalsolo]

Methinks there is a decent market for that bracket.

[MPbdy]

I'm surprised Mattster hasn't jumped in here.  Seems to align pretty well with the blockoff plate he made for the shifter.

[orion4096]

There's a few more things I want to try before posting up the files.

o Check KRC pulley.
It would be pretty sweet if their 6" and 6.5" ls1 pulleys are a bolt-on to the mazda pump.  Sure looks that way from pictures, but I want to check.  Looks like their pulley hits one of the mounting bolt heads.  The pump might have to move to fix that.  The offset from the head will also change.  Assuming this works out, their y-body offset pulley might bolt right in.

o Find a position for the reservoir where the return line back to the pump doesn't kink.  It's hard to do this without knowing where the pump is going to end up.

o Make a test bracket and spacers out of aluminum and try it.

My friend needs to let me borrow his KRC pulley. 

[orion4096]

Lots of interesting stuff happened today.  My friend dropped by and he had the 6.5" fbody offset krc pulley which I was able to borrow for 30 minutes to check fitment with the mazda pump.
o It fits the mazda splines and has the perfect depth to rest on the bearing.  It's pretty close to the AN pressure line fitting, but it looks like it will clear with enough room.  I also tried a banjo->AN fitting and it rubs against the oem banjo bolt flange - not a big deal since I prefer the metric->AN fitting anyway.  Might work by grinding down the flange on one side.
o I decided to re-use the oem bracket to help position the pump in approximately the same position as the ls1 pump for better pulley clearance.  This requires an adapter in the back on the oem bracket with flat, countersunk bolts as well as a front adapter that ties into the back adapter and oem bracket through standoffs and long bolts.  The reservoir I bought might be a tight fit, but it should work.
o y-body pulley is going to hit the fittings.  If a 90 degree m14->AN (or something else) exists then that and the return fitting was replaced with something like this: http://www.krcpower.com/ecommerce/pump-repair-parts/aluminum-pumps/1st-design/1st-design-and-cast-iron-pump-inlet-fitting-10-male.asp it might bolt in.

I'm going to make the brackets and standoffs out of aluminum tomorrow morning (with non-ideal tools) and bolt it together without the pulley.  Pulley shows up in the mail next week.

Here are pics of the two brackets that are printing right now:

[wickedrx7]

Nice work! Had no idea you were doing this!

[Mad Ra88it]

If you end up wanting these cut out in metal... let me know. I've got a 4'x4' CNC Plasma and cut out a bunch of products for others in the norotors and subaru communities.

[wickedrx7]

Why do you want to increase the size of the pulley?  That would just slow down the PS pump.  Also, why the front and rear brackets? 

[orion4096]

If you end up wanting these cut out in metal... let me know. I've got a 4'x4' CNC Plasma and cut out a bunch of products for others in the norotors and subaru communities.

I spent 3 hours with the angle grinder and $100 drill press this morning.  Might take you up on it next time.  Pretty sure we've talked before on some other car/bike forums.

Why do you want to increase the size of the pulley?  That would just slow down the PS pump.  Also, why the front and rear brackets? 

Correct, I want to slow down the pump relative to what it would be running with the (4.5-4.6"?) oem Mazda PS pulley on a ls1.  I'm running a stock size ls1 damper (7.53") and don't want to run an underdrive damper.  The rpm limits listed below are a bit artificial since people bump those up, but the stock damper with mazda pulley scares me a little.  There's also flow rates vs rpm and probably a lot of other [something] vs rpm characteristics I don't understand.  Originally, I was going to try the mazda pulley but KRC has 4 pulleys that are around $100 that all bolt onto the pump: 6.5"/6" fbody and 6.5"/6" ybody.  That was significantly cheaper than some of the aftermarket rotary PS pulleys - most of which I couldn't find dimensions for.

rotary    8043 = 4.625" / 4.6" * 8000 peak rpm
ls1 maz 10803 = 7.53 / 4.6" * 6600
ls1 krc   7646 = 7.53 / 6.5 * 6600
ls1 krc   8283 = 7.53 / 6.0 * 6600
ls1 udp  8135 =  5.67 / 4.6 * 6600

The back bracket adds a bunch of support which is nice since I positioned it about where the stock ls1 pump goes and re-used the ls1 bracket.  The pump is sitting on the added bracket which, in turn, bolts into the ls1 oem bracket.  That's the reason countersunk bolts were needed.  With the pump sitting closer to the middle of the head it's probably not as useful, but then the 6.5" pulley hits the idler pulley.  Also, a larger front bracket that bolts directly into the head interferes with the 6.5" pulley.  The y-body pulley has some hope of working, too.

I got rid of one the bolts because it was in the way.  Still need one longer bolt, maybe some more spacers on one bolt to clear the pulley, reservoir mount, and the pulley (coming next week)before it runs again.  Might grab this m14->-6 90 degree fitting tomorrow: http://parker.com/portal/site/PARKER/menuitem.bb22d5a82bbb5b147cf26710237ad1ca/?vgnextoid=a2d9b5bbec622110VgnVCM10000032a71dacRCRD&vgnextfmt=EN&vgnextpartno=6M14C8OMXS&vgnextdiv=687614&vgnextcatid=2383933&configtype=

[Mad Ra88it]

I spent 3 hours with the angle grinder and $100 drill press this morning.  Might take you up on it next time.  Pretty sure we've talked before on some other car/bike forums.

 Sounds great, give it a test and we can work out cranking a bunch out for you. Wow, 3hrs! That much of machine time would likely produce quite a few of these brackets.

[orion4096]

Got the pulley today.  Not sure if the 6" pulley will fit without some changes, but the 6.5" goes on.  My spacers are all too short because I made them with hand tools.  This causes the brackets to flex a little which isn't good.  A lathe would solve the problem, but for the time being I removed one of the bolts to fix it.  There's just over 1/8" of clearance with the feed line AN fitting and the pulley.  Should be fine.  I need to reroute the line in the pic so it doesn't get in the way of the reservoir.  It will be running again this weekend.

[wickedrx7]

So I was thinking about this and thought for sure I calculated the RPM of the PS pump when I first designed this and it was going to be about 8,000 rpm at 6,500 rpm which would be acceptable... But that was with a 25% under-drive pulley.  With stock LS3 pulley, you would be at around 10,000rpm.... We will see how the pump holds up once I get my car tuned....

[gnx7]

love this thread!

Also thanks for the MAF hole plug.   That was pretty trick.