LSA with speedtech subframe

[jimmythehand]

I know there has been some discussion about having to notch subframes to accomodate accessory drives on the LSA. Has there been any definitive solutions to avoiding the notching and still retaining those accessories? Specifically related to Speetech subframe if possible...thanks.

[cwylie]

Not with the stock lsa compressor. You may be able to fit a SD7B10 compressor but that would also depend on the motor mounts you use. I think their new subframe is being build to allow for a low mount compressor though.

[cwylie]

I gave up on trying to fit it down low on the stock subframe with the holley motor mounts and bought the accessory drive from Concept One.

[dhutton]

Concept One is a nice setup but sending the supercharger off to Lingenfelter for the pulley upgrade made it a no go for me. I got my compressor installed down low with a modified VA bracket to clear the mounts. Also needed the VA Sanden compressor with side exit ports instead of rear exit. It was not a Speedtech sub but something similar might work.

Don

[alongfortheride]

Well here is an lsa engine with compressor mounted low in stock subframe
http://i60.tinypic.com/2ni2rg9.jpg

[waynieZ]

Don did you have to cut the sub frame to install it with your mount? Which accessory drive did you use with it?

[ironworks]

The corvette drive will interchange with the LSA drive system. We did that to bring the alternator up.

[dhutton]

Don did you have to cut the sub frame to install it with your mount? Which accessory drive did you use with it?

No mods to the subframe but I am running an Art Morrison subframe. VA compressor bracket was modified and I had to make a small cut to the alternator plastic. I am running the stock LSA accessory drive. If you are running a stock subframe I think this modified LSA accessory drive (uses Corvette accessories same as Rodger is recommending above) is the one to use: 19303242

Don

[Blake Foster]

You can not fit the LSA ac compressor with out notching the frame.

[ironworks]

The Stock Gm compressor is designed for a COnstant pressure system and really should not used in a Cycling system ( Vintage Air ). You can have the GM compressor converted but I don't know anybody who has had one survive or not leak its guts out.

We use the compact AC compressor in the stock location. But we also adapted the Corvette bracket system to the LSA drive system to move the alternator up and away from the rack n pinion. It actually was pretty easy.

http://i616.photobucket.com/albums/tt248/ironworksspeed/Fairway%20Chevrolet%201970%20Chevelle/3-28-2013019.jpg (http://s616.photobucket.com/user/ironworksspeed/media/Fairway%20Chevrolet%201970%20Chevelle/3-28-2013019.jpg.html)

[ironworks]

http://i616.photobucket.com/albums/tt248/ironworksspeed/Fairway%20Chevrolet%201970%20Chevelle/3-13-2013010-1.jpg (http://s616.photobucket.com/user/ironworksspeed/media/Fairway%20Chevrolet%201970%20Chevelle/3-13-2013010-1.jpg.html)

[GRob]

Wegner has a setup under development.

[cwylie]

Wegner does for an LSA?

[jimmythehand]

Does anyone know anything about the setup from street and performance? It looks like from the picture on bottom left, that the a/c and alt are both relocated up, so notching would not be needed.

http://www.hotrodlane.cc/lsasetups.jpg

[ironworks]

Does anyone know anything about the setup from street and performance? It looks like from the picture on bottom left, that the a/c and alt are both relocated up, so notching would not be needed.

http://www.hotrodlane.cc/lsasetups.jpg


All their stuff I have used is JUNK.

Just use the Vette bracket system for the engine drive. Its a simple swap with proven GM parts.

[cwylie]

I didnt have the best experience with street and performance either. The shipped me the wrong part. I paid for shipping both ways and they still took forever to refund my money.

[jimmythehand]

what about this setup? anyone had experience with it?


http://www.southernperformancesystems.com/Parts/mr-kit-lsa.html

[dhutton]

what about this setup? anyone had experience with it?


http://www.southernperformancesystems.com/Parts/mr-kit-lsa.html

It looks like it is based on the Kwikperformance setup. The supercharger is only on a 6 rib belt versus the stock 8 rib.

Don

[kwhizz]

Look at the belt wrap on the supercharger pulley on that Southern Performance set-up versus the GM set-up.........After being at Wegner and seeing how violently the tensioner pulley bounces around under load on the Dyno.........I would say that the SP setup would be good for Idling around town only........Like Rodger said.....It needs to be driven off the crankshaft pulley by itself........Just my $.02

Ken

[ironworks]

Just because some body sells some thing as the cats meow does mean it doesn't really suck. People sell lots of junk every day.

[jeds]

Rodger,

Will your trick with the corvette drive system work with a DSE sub? If so, what are the parts one would need to piece together for the complete system?

Thanks

[dhutton]

Rodger,

Will your trick with the corvette drive system work with a DSE sub? If so, what are the parts one would need to piece together for the complete system?

Thanks

No trick needed. GM sells it as a complete kit. Part number 19303242. Corvette based LSA accessory drive. If you google it you will find the complete parts list and instructions.

Don

[jeds]

Oops! Thanks Don.

I completely missed your response earlier that included the part number.

Much appreciated.

[jeds]

Dang...I just noticed that this relocates the alternator not the A/C...I need to pay better attention.

Looks like it will still require modifying something to make that part work.

[dhutton]

Dang...I just noticed that this relocates the alternator not the A/C...I need to pay better attention.

Looks like it will still require modifying something to make that part work.

The best available solution with relocated A/C is Concept One. Unfortunately that requires sending the blower off to Lingenfelter for a pulley upgrade.

Don

[kwhizz]

Using a Sanden SD-7 Compressor......This is how I got everything to work in my Chevelle........







http://i13.photobucket.com/albums/a251/kwhizz/66%20SS%20Chevelle/null_zps09b41440.jpg

http://i13.photobucket.com/albums/a251/kwhizz/66%20SS%20Chevelle/null_zps28901b54.jpg

[Blake Foster]

I see Concept one has a system for the LSA that http://www.c1pulleys.com/chevylsvictory-sc03.html
and that one looks like it will work.

[cwylie]

With the C1 setup you dont have to send it off to Lingenfelter. You can remove the stock pulley and press the new one on yourself as long as you have a press. Its not that tough if you have the correct tools.

[ironworks]

I see Concept one has a system for the LSA that http://www.c1pulleys.com/chevylsvictory-sc03.html
and that one looks like it will work.

The 6 rib belt on the C1 will slip every time you get on the gas hard, those factory bracket systems have the accessory and 8 rib blower drive on Separate system for a reason. We had a few issues with the factory drive belt doing the same on the Dyno pulls for Hot Rod Magazine. We went to a fixed tensioner on the blower and it has worked flawless since.

[dhutton]

With the C1 setup you dont have to send it off to Lingenfelter. You can remove the stock pulley and press the new one on yourself as long as you have a press. Its not that tough if you have the correct tools.

Interesting, for some reason I thought there was some machining involved. At least that is what I recall reading somewhere.

Edit: Here are the instructions for the specified pulley. Some machining required:

https://www.lingenfelter.com/sites/lpe/files/attachments/L250150309%20Lingenfelter%2010%20bolt%20supercharg er%20pulley%20hub%20kit%20v1.1.pdf

Don

[dhutton]

The 6 rib belt on the C1 will slip every time you get on the gas hard, those factory bracket systems have the accessory and 8 rib blower drive on Separate system for a reason. We had a few issues with the factory drive belt doing the same on the Dyno pulls for Hot Rod Magazine. We went to a fixed tensioner on the blower and it has worked flawless since.

I think the Concept One uses an 8 rib belt. All the accessories are modified with 8 rib pulleys.

Don

[cwylie]

Interesting, for some reason I thought there was some machining involved. At least that is what I recall reading somewhere.

Edit: Here are the instructions for the specified pulley. Some machining required:

https://www.lingenfelter.com/sites/lpe/files/attachments/L250150309%20Lingenfelter%2010%20bolt%20supercharg er%20pulley%20hub%20kit%20v1.1.pdf

Don

If you want to run the really small 2.35 blower pulley you have to grind to tabs off the blower snout which they say to machine off but it would be easily done and look nice with a die grinder, sanding disk and flap wheel. The other thing they recommend is you pin the blower pulley to the input shaft but almost no one does this that I have found and I have not seen any issues.

I used a large 3 jaw puller to get the stock pulley off (bending it in the process) and then pressed the new pulley adapter on with my 20 ton press.

[dhutton]

[QUOTE=cwylie;606603]If you want to run the really small 2.35 blower pulley you have to grind to tabs off the blower snout which they say to machine off but it would be easily done and look nice with a die grinder and sanding disk or flat wheel. QUOTE]

OK, that makes sense. I didn't pick that up in the instructions. Thanks for explaining it.

Don

[jimmythehand]

It seems to me that all the systems discussed so far only relocate EITHER the a/c or alternator...from what i have researched both of these components caused fitment problems and required notching of the frame. has anyone combined (say the C1 and the vette setup) to eliminate notching all together?

[dhutton]

It seems to me that all the systems discussed so far only relocate EITHER the a/c or alternator...from what i have researched both of these components caused fitment problems and required notching of the frame. has anyone combined (say the C1 and the vette setup) to eliminate notching all together?

Concept One should not require notching the stock subframe as far as I understand it. Have you called them and asked them? I don't think you will find a more compact setup.

Don

[kwhizz]

That's more like it................

[Jr]

C1 does look good.

Does 19303242 come with an 8Rib belt stock?

[dhutton]

C1 does look good.

Does 19303242 come with an 8Rib belt stock?

Yes.

[cwylie]

The C1 setup does fit without notching the subframe. Thats what I am currently running.

http://i1216.photobucket.com/albums/dd372/Chris_Wylie/IMG_8499.jpg

[ironworks]

It looks like Chevrolet makes a Hybrid Custom system.

They must have liked my idea 2 years ago.

http://r.search.yahoo.com/_ylt=A86.J3QY4WhVSRkAk5YnnIlQ;_ylu=X3oDMTE0NXI5bTB kBGNvbG8DZ3ExBHBvcwMyBHZ0aWQDRkZYVUkyN18xBHNlYwNzc g--/RV=2/RE=1432965528/RO=10/RU=http%3a%2f%2fwww.chevrolet.com%2fcontent%2fdam% 2fChevrolet%2fnorthamerica%2fusa%2fnscwebsite%2fen %2fHome%2fVehicles%2fPerformance%2fCatalog_Downloa d%2f02_pdfs%2fmodified-lsa-accessory-drive-system-19303242.pdf/RK=0/RS=K4Pz1XVT9WOc8jLsH3P4XfvRsFY-

[dhutton]

It looks like Chevrolet makes a Hybrid Custom system.

They must have liked my idea 2 years ago.

http://r.search.yahoo.com/_ylt=A86.J3QY4WhVSRkAk5YnnIlQ;_ylu=X3oDMTE0NXI5bTB kBGNvbG8DZ3ExBHBvcwMyBHZ0aWQDRkZYVUkyN18xBHNlYwNzc g--/RV=2/RE=1432965528/RO=10/RU=http%3a%2f%2fwww.chevrolet.com%2fcontent%2fdam% 2fChevrolet%2fnorthamerica%2fusa%2fnscwebsite%2fen %2fHome%2fVehicles%2fPerformance%2fCatalog_Downloa d%2f02_pdfs%2fmodified-lsa-accessory-drive-system-19303242.pdf/RK=0/RS=K4Pz1XVT9WOc8jLsH3P4XfvRsFY-

So did Super Chevy apparently:

http://www.superchevy.com/how-to/engines-drivetrain/1305-lsa-accessory-drive-kit/

Don