LT1 GenV swap

[87chevy.com]

I found a shop that can make a small batch (2 sets) one for me and one to sell. It will be an even better version as the center section of the 2 patterns will be cnc ported. Finaly figured out how to do it in the cad program. Granted you could hand port the original design of the 2 patterns drilled strait down 1/2 way. The cost adding the cnc poring operation is on the acceptable side of the scale.

Once the order is placed and received I'll offer it up for sale as long as it pass' my own inspection.

last thing I need to do in cad is finish mapping out the Exhaust manifold port/bolt holes - 90% done

I have ordered the e85 sensor, fuel line. I finally sourced new connectors for the cluster, fuel pump, fuel pump driver module, e85 sensor, fuel psi sensor connectors. I also won an auction for a BCM with pigtails, but the bcm is not a match for the application, but for the price I paid, was ok to acquire the correct BCM pigtails which are not sold by GM or online unless bought from a manufacture.. looking at 500$ minimum. The point of getting the connectors new is to save from the junk yards... they want an average of 250 for the pigtails. Im not one to go in and steal them so this is the most affordable option which is defiantly cheaper than 250!
I also have located all the cluster, fuel pump module, fuel psi sensor, e-85 sensor, bcm, and ecu terminals to make my standalone harness. I have one member interested in me making him a complete stand alone harness, fuel pump to ecu which is a complement.

The point of doing all of the research and locating the terminals is to prevent butt connections / unnecessary splices in the harness. Yes it works and will function, but if something doesn't work, especially since I will be attempting to get the 2015 cluster/bcm to function... I don't what to have to worry about a splice.

Just about done with the current project will by my daily driver.. the LS swapped 5 series BMW so cant wait to drive it and start on the 87 Silverado. I wont start on the 87 till I sell the motor/trans/exhaust (as 1) as I cant afford the space to have that motor/trans setup sitting around so its a small problem/but a good problem as the buyer can hear the motor and take a ride in the passenger seat before the purchase unlike a motor sitting on the garage floor on top of a tire..
clint

[cornerstone]

Nice work Clint... I only wish I was able to be that detail oriented. My project (same drivetrain but in a 72) is getting closer to needing the harness. Just to reiterate I do have a complete 14' harness in great shape and matching computer. Just give me a pm when you think you will be able get me going. Thanks man, Brian

[87chevy.com]

Installed



.06" gap with no gaskets installed. Add the 2 gaskets add another .070".. Plenty.. the Dirty Dingo adapters were thicker and the belt was a pretty close to the edge of the pulley, it would work but these are as close as I wanted it to get, which will put the belt more centered/away from the edge of the pulley.

[87chevy.com]

If anyone's interested 140 shipped for a pair of adapters, no bolts or hardware.. not planning on a 2nd order at this time so 4 sets is all I will have to sell. These also don't have a npt port on the passenger side like the DD ones. I chose not to have it made into it since not everyone, myself included wants it. Plus, npt taped holes are sealed with the threads and Teflon and can done by anyone with one hand and one eye and minimal tools which if your doing this swap you have .. hopefully...
Clint

[87chevy.com]

Got the pump hung...



belt alignment looks good so far. Not sure if I will hang an idle pulley off if the power steering bracket to get more belt wrap around the balancer or not. The pump came from ebay forget which year silverado, think it was 06+.. only chose it cause of the windows in the pulley. Could compare it to the 99-02 pump that's in my 87 swap once it gets removed. As far as the tensioner, I found the tensioner Dirty Dingo uses, same one Magnuson Superchargers uses in some applications... heavy duty 8 rib application tensioner.. wonder if it's too much tension on a 6 rib belt. Still looking for a 6rib version of that same style tensioner, basically pulley is flush with the mounting base of the tensioner..
Clint

[87chevy.com]

site is frustrating with this 30 minute editing policy.. so, another post

this is basically what I'm going to aim for as far as fit/form/function except the top of the pump reservoir more parallel like my picture.. damn aesthetics



after a little searching, this tensioner seems to be the exact same as the 2014 Silverado, but tensions the belt the opposite direction... but the tensioner base is not flush with the pulley, like I had hoped for. If it happens to be the same as the Silverado's, even at a 1/4 plate bracket would be right at the edge if not over the edge of the pulley from my eye balling things.. might make a trip to the autoparts store and compare if they have these in stock. I doubt they will order a part just to let the customer see it...
clint

[Sturvin]

Originally Posted by 87chevy.com

site is frustrating with this 30 minute editing policy.. so, another post

this is basically what I'm going to aim for as far as fit/form/function except the top of the pump reservoir more parallel like my picture.. damn aesthetics



after a little searching, this tensioner seems to be the exact same as the 2014 Silverado, but tensions the belt the opposite direction... but the tensioner base is not flush with the pulley, like I had hoped for. If it happens to be the same as the Silverado's, even at a 1/4 plate bracket would be right at the edge if not over the edge of the pulley from my eye balling things.. might make a trip to the autoparts store and compare if they have these in stock. I doubt they will order a part just to let the customer see it...
clint

Where did you get all these models from?!?!

[87chevy.com]

They were just pictures of the rendering. The pictures were from goatbuilt.com

[Longhornss]

You may be able to find some 3D renderings on CAD grab
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[87chevy.com]

Got the power steering mocked up. Just need to cut out the front bracket and triple check the last changes. Just need to draw up the spacers and have the a machine shop make em



Pretty satisfied with the look, incorporated an idler just to get more belt wrap on the crank. I might make the decorative holes a touch smaller but there there for the artistic touch.
Pump is placed lower than the highest point of the intake, and as close to the block as possible.. almost like a ls 5.3.

Got a promising 6 rib tensioner, research paid off so far, it's identical to the HD version mentioned earlier but only 6 rib width. Ironically uses the same pulley as the LT.. I could go as far as testing the tension by hanging weight from the pulley just to see since I plan to make 5 sets of these brackets and sell 4 of them.

Alternator bracket nearing completion.

Header flange is almost mapped out, just need to adjust 1 port.. seems easy but takes many prints to get it exactly spot on, like the water pump adapters. Close is good, exact is better

Clint

[87chevy.com]

Not bad at all for first try..



only to add a notch around one of the water pump bolt boss is.. other than that, power steering bracket is done, just need to make it in metal, then buy a box of washers to get the belt centered and go for round one at the machine shop.

I'll wrap up the alternator bracket mock up this weekend.
Clint

[toddoky]

Originally Posted by 87chevy.com

Not bad at all for first try..



only to add a notch around one of the water pump bolt boss is.. other than that, power steering bracket is done, just need to make it in metal, then buy a box of washers to get the belt centered and go for round one at the machine shop.

I'll wrap up the alternator bracket mock up this weekend.
Clint

Are you going to attempt to retain the use of the vacuum pump? It's interesting to note that the aftermarket controllers GM sells to support the LT1/LT4 crate engines defeat cylinder deactivation functionality of the engines and therefore the need for the vacuum pump.

[87chevy.com]

Originally Posted by toddoky

Are you going to attempt to retain the use of the vacuum pump? It's interesting to note that the aftermarket controllers GM sells to support the LT1/LT4 crate engines defeat cylinder deactivation functionality of the engines and therefore the need for the vacuum pump.

Yes sir,
Stock truck intake doent have a provision for vacuum port's. The car lt1 has a port iirc. But no need to buy it if the vacuum pump fits between the frame rails without mods so why not keep it for the brake booster and in the trucks application vacuum ac controls. Expecially for the guys that do cams. There's hydropower option, but again more parts to buy. No worry about lack of vacuum with either option. To me, be silly to delete the vacuum pump only to by a electric vacuum pump or retrofit hydroboost. The way the intake is molded... it seems someone would have to cut into it to make sure they get the right spot to get the vacuum source.
As far as DOD... im sure most people swapped or not remove that feature.

But the beat thing about swaps is the aftermarket support

Clint

[toddoky]

Your logic sounds reasonable for your application. I know that the pump won't physically fit in many of the typical GM car swap applications, so if there is no suitable take-off point for vacuum on the truck engines (I've not seen one in person yet to know) then an alternative option will need to be employed for them.

[87chevy.com]

Got the alternator brackets drawn up. Going to swap the tensioner and idler locations.. think it will look better, also allows use of the factory tensioner...

[Longhornss]

Looks good.
Keep up the good work. I personally will be going the Holley LS bracket direction as I will be running Vintage Air and am unable to run a factory compressor. I have no concerns with keeping the alternator on the passenger side and have no need for a vac pump with manual disc brakes.

I do have a driver side Holley adapter mocked up so I can check fit and possible interference when I get the engine in the frame.
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[87chevy.com]

Originally Posted by Longhornss

Looks good.
Keep up the good work. I personally will be going the Holley LS bracket direction as I will be running Vintage Air and am unable to run a factory compressor. I have no concerns with keeping the alternator on the passenger side and have no need for a vac pump with manual disc brakes.

I do have a driver side Holley adapter mocked up so I can check fit and possible interference when I get the engine in the frame.
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Why are you using a letter to run the factory ac comoressor? Location?

[87chevy.com]

Originally Posted by 87chevy.com

Why are you using a letter to run the factory ac comoressor? Location?

Lol.. Multi tasking plus this site's edit policy.. why aren't you able to run the factory ac compressor...

[Longhornss]

Originally Posted by 87chevy.com

Lol.. Multi tasking plus this site's edit policy.. why aren't you able to run the factory ac compressor...

The Vintage Air units do not work with new style factory units.
That is, they do not work with variable displacement compressors. Like the ones found in a lot of modern vehicles.

I could possibly use a sanden low mounted on the passenger side.
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[Longhornss]

Well here is my mock up adapter on the engine. This is basically so I can get the LT in the frame and make sure the accessories are not going to interfere with any of my porter built suspension parts....
Attachment 1585611

[solidaxel]

With the new spacers will this bracket work with the Corvette balancer?

[87chevy.com]

Originally Posted by solidaxel

With the new spacers will this bracket work with the Corvette balancer?

Brackets yes, spacers no, they would have to be machined shorter and maybe the truck pump couldnt be used.. to get a better idea, could you measure the front timing cover to the face of the balancer.. tape measure will be fine to get an idea if the truck pump would work as thats what i have for mockup and am using.
Clint

[Longhornss]

Well guys doing a quick "gen V LT" search on holleys page produced some promising images.

[87chevy.com]

Well there's 2 important days in projects... day one, and if you watch overhauling "d" day... we're on day one and I'm not counting....



Clint

[87chevy.com]

Well "fits like a glove" was not said today.... with the motor and trans in, using 3/8 plate as the adapter but not bolted to the clam shell... trans raised till it contact's the tunnel the driveline angle is about 7-8 degreese. Oh and the oil pan rests on the cross member. Could shim the motor mount frame bracket, cut the cross member, or make a custom mount. 2 of the 3 woukd raise the trans even higer.. Yeah I know dirty dingo sells mounts, but the crossmember is still an issue and says low mount ac is an issue.
Think I'm just gonna make my own and call it good.. I'll post pictures tomorrow with the truck manifolds on, hopefully they fit... dont want to build another set of headers... it's rewarding and time consuming all at the same time.

Modifying the oil pan isn't a big deal but leaving it at this height leave the steering linkage rod close to the oil pan.. and as the motor mount gets worn it is like to contact. I also havnt turned the steering wheel to see if the rod raises when tm steering wheel is turned.

More tomorrow..