Re: LT1 GenV swap
 

Hahaha! Its funny how asthetics are as important as function. Im with ya... Are you going to make extras to sell on those also? I liked the KWIK setup because the PS pump is low and looked simple to plumb, a short distance to the gearbox.

Re: LT1 GenV swap
 

Looks like the brackets were reused from the ls fead... are the head bolt layout the same? I'm still puzzled why they decided to move the alt to the driver side, it would require a separate harness to extend from the original location to the new.
Clint

Re: LT1 GenV swap
 

Here's a bracket I made to work with the TVS1900 I put on my engine with the Holley brackets:

Re: LT1 GenV swap
 

That's a good observation on your part, the brackets are the exact same ones used in the Holley LS FEAD drive set-up, which are adapted to the bolt pattern of the LT engine by means of the adapters in-between them both. This configuration was beneficial in keeping cost in check so that pricing will close to what the LS set-up is. The alternator position won't be preferable by everyone, especially those using a stock take-out ECU and wiring harness. For those going with an aftermarket EFI system like those from Holley, then the connections needed are just as easily made as if the alternator was mounted elsewhere. I know our beloved GM trucks are the focus of this forum, but there are many more applications Holley makes swap parts for that require configurations or designs that are not necessarily optimized for our trucks.

Re: LT1 GenV swap
 

Of course, I'm a master tech for BMW and one thing I know is you can't please everyone.. but appreciate the support holley is offering though

Does the holley brackets fit a stock lt1 alternator?

This is basically what it is.. it woukd use the captors alternator and tensioner... gonna need to put the intake on it, but it should be 0 problems with that, and ad far as hood clearance, it's only raised maybe 1-2 inches... if the intake is higher than the alt, no problems
https://imageshack.us/a/img921/473/Zgb5Qo.png

Re: LT1 GenV swap
 

I'll have to find out for you as I'm merely the information middle man on these components.

Re: LT1 GenV swap
 

Minor parts
Oil cooler bypass cover just incase the oil cooler manifold doesn't fit.

https://imagizer.imageshack.com/img922/7299/1zkyV5.jpg

Re: LT1 GenV swap
 

And the long awaited fuel pump driver module connector.. brought 2nd one to use for one additional harness:)

https://imagizer.imageshack.com/img924/5457/yAdSPQ.jpg

Besides the belt drive that's almost worked out and motor mount adapters I think I'll be ready for the swap.

Re: LT1 GenV swap
 

87Chevy.com, the Holley alternator bracket will accept the LV3/L83/L83 truck alternator, but not the LT1/LT4 alternator. This is due to the mounting hole spacing difference between them.

Re: LT1 GenV swap
 

Cool, thanks for the details.
Clint

Re: LT1 GenV swap
 

Toddoky I am down for this setup, I have run several of the Holley LS kits and band for the buck they are the absolute best "budget" kit available in terms of form and function.

I want one and want more information on how this all works.

Re: LT1 GenV swap
 

Clint, I was looking at getting a set of the DD Mounts but was quite honestly put off by the hard corners inside. I was going to do the same thing you are doing and Design and find someone to make me a Ported set. Then I figured I would do exactly like Holley did and design an adapter for their LS brackets to the LT.
Like I said in my last post I have used the LS brackets several times and have been extremely happy with them.

Re: LT1 GenV swap
 

As soon as we get closer to launch of the system I will be sure to post more information on it.

Re: LT1 GenV swap
 

Toddoky,
I just read my last post.... Boy that sounded demanding. I was extra leg happy to see you working on this.

Do you guys have a target release for this kit. Will we be able to purchase it in components, as the LS kits are offered.
Thanks

Re: LT1 GenV swap
 

I understood you were just looking for info and wasn't put-off by your inquiry. The development of the Holley accessory drives is not something I work directly on (they are handled by another design engineer on staff) and so I can only report information on them second-hand as information is made available to me. I've not heard what the target release date is, but the components are in the tooling phase, so that would usually indicate a timeframe of 2-3 months.

Re: LT1 GenV swap
 

That is good to hear I am looking forward to these. Saves me the effort of having to figure it out on my own.

Re: LT1 GenV swap
 

Got the pump hung...

https://imagizer.imageshack.com/img921/923/TXgnHk.jpg

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

Re: LT1 GenV swap
 

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 :)

http://goatbuilt.com/wp-content/uploads/4405-4408-1.jpg

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

Re: LT1 GenV swap
 

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

https://imagizer.imageshack.com/img923/351/qYmMTm.jpg

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

Re: LT1 GenV swap
 

Not bad at all for first try..

https://imagizer.imageshack.com/img924/1865/jUjVjF.jpg

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

Re: LT1 GenV swap
 

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.

Re: LT1 GenV swap
 

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

Re: LT1 GenV swap
 

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.

Re: LT1 GenV swap
 

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...

https://imagizer.imageshack.com/img924/6123/tur2gH.jpg

Re: LT1 GenV swap
 

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.
Posted via Mobile Device

Re: LT1 GenV swap
 

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

Re: LT1 GenV swap
 

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.
Posted via Mobile Device

Re: LT1 GenV swap
 

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

Re: LT1 GenV swap
 

Think i got a winner..

https://imagizer.imageshack.com/img923/6186/c77JMo.jpg

Satisifed with everything, gonna find some plate, cut em out and then start measuring for the spacers.

Clint

Re: LT1 GenV swap
 

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

Re: LT1 GenV swap
 

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

Re: LT1 GenV swap
 

Well guys doing a quick "gen V LT" search on holleys page produced some promising images.
Attachment 1587051

Re: LT1 GenV swap
 

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

Re: LT1 GenV swap
 

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

You may be able to find some 3D renderings on CAD grab
Posted via Mobile Device

Re: LT1 GenV swap
 

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....

https://imagizer.imageshack.com/img921/8716/woXppo.jpg

Clint

Re: LT1 GenV swap
 

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..

Re: LT1 GenV swap
 

Your discoveries lend some insight into why we modeled the bottom of the coming Holley LT pan after the geometry of the 302-2 LS pan. Another LT geometry characteristic I'm not sure I shared with you earlier is that the engine mount bosses on the LT block are 3/8" taller on each side of the engine than they are on the LS blocks (CAD verified). This means the use of 3/8" thick adapter plates as was typically used in many LS swaps is going to position the crankshaft height of an LT engine higher in the chassis than would be the case with an LS engine. This is one of the reasons I divorce myself from the stock engine brackets entirely, so as to have more freedom to position the engine height exactly where I want it.

Re: LT1 GenV swap
 

I was mimicking the aftermarket adapter plates or so i was trying.. was hoping for the best
No biggie, any dimensions available on the pan? Or eta on availability. Gonna look online at the holley pan to see if they are similar in thickness, viewed from the side.
Clint