LT1 GenV swap

[Longhornss]

You may be able to find some 3D renderings on CAD grab
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[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..

[toddoky]

Originally Posted by 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..

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.

[87chevy.com]

Originally Posted by toddoky

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.

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

[toddoky]

Originally Posted by 87chevy.com

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

The exterior side profile of the new LT pan is a dead-ringer for the 302-2 pan and was intentionally executed that way to support the LT swap system plans we've made for the coming year. I will get an update on the release status, but I may not be able to report it until after the 1st of the year when we all get back to work.

[Longhornss]

I have asked Holley these questions.
Here is the response I have gotten.

"I checked with Product management and we do not have anything ready for release yet at this point on specs or price point we should soon. We are targeting end of February."
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[87chevy.com]

Info only, l83 manifolds are a no go.. driver side is acceptable, passenger side impossible without serious frame cutting. Gonna finish mapping out the exhaust ports and get a set of flanges cut out maybe 2-3 sets and sell em to offset the costs.

Gonna go to the bone yard and see if there are any tall hump tunnels to cut out.
Clint

[Longhornss]

I could probably get you a set of 3/8 stainless fanges cut fairly cheap no need to have multiples to offset the cost....
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[87chevy.com]

I'm still sorting out how retrofit the 2015 fuel pump into the 87 tank... it already has a baffle.. but the opening is only 3", and the main reservoir with regulator is 3.15 ish.. plus the upper plastic parts that houses the regulator ...so if use the whole assembly, this is what I think would work out



Basically the octagon shape plate will get welded to the tank, and has the base for the oe sealing ring, a spacer since the o-rings is so thick, and the top ring plate to sandwich it all together. If I could find a flat gasket that fits the pump, that would be better since it could be made out of the same sheet of steel.

Kinda stalled out since I'm trying to source a high hump tunnel.. struck out at 3 pick n pulls.

If anyone has a line on a 81-87 truck or 81-91 crew cab high hump tunnel pm me. Also looking for pictures of 4x4 suburban floor pans to see if that could work. Hours of searching and can't find a single suburban high hump picture on the Internet.

[Longhornss]

Can't help you on the high hump stuff.
Have you looked at Ricks tanks.... they have weld on rings and fabrication parts for fitting factory latemodel fuel pumps.
Still waiting on a reply from my shop on the other parts. Hopefully Tuesday.
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[87chevy.com]

Rick's got some nice stuff, pricey, but nice product. I found a salvage yard for the high himp trans tunnel.. got 2 on the way.. one for me and one for the next guy that has trouble sourcing a high hump tunnel. Gonna toy with the fuel pump sender again.
Clint

[87chevy.com]

Got the pair of high hump tunnels in today.. who knew this Friday the 13th was also hump day



One for me and one to sell. Both in perfect shape.

Gonna plan out how to go about trimming the tunnels to graft them together. Seen a post that did a high hump swap.. gonna go stare at the pictures before cutting mine. I'll be taking pictures and maybe a how to one day if the pictures turn out

Clint

[Longhornss]

Hey that's great. Did you notice Holley has the dimensions for the 302-20 oil pan posted. Looks promising lots of clearance under the front of the engine.
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[87chevy.com]

Originally Posted by Longhornss

Hey that's great. Did you notice Holley has the dimensions for the 302-20 oil pan posted. Looks promising lots of clearance under the front of the engine.
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Nice, can't wait till the pan is available.
Clint

[87chevy.com]

Man the point in a project when you just say wtf... we'll there and the mood passed...

Got the tunnel trimmed to fit


Used a silver sharpie in my case and outlined the panel with it.
(No need for a picture)

Placed 1" masking tape on the inside of the sharpie line



Lay the panel on top, if I seen tape, I adjusted it so when I cut the inside tape line in would have about an inch from the new panel.




Cut and sit back and realize what you just did..



Hump ready to be installed which ever method you like, rivet or weld



Now, I like the pan clearance....



So being the floor panel and all, laying the panel on top and installing it probably won't show though the floor insulation and carpet, but I think trying to butt weld the panel flush will be too much effort and lots of fristration

Now I just need to prep the two for final assembly but for now, it can be riveted together

Clint

[1gr8ate]

I am working on this same swap in my 71 c10 right now. I wound up using the dirty dingo brackets with a f-body ps pump. For the most part I like the way it all fits but hate Dirty Dingo carved their name in everything so blatantly. Wish holley kit was available. I don't have the BCM or Fuel pump module I had just planned on using a Walburo pump with vette filter regulator to supply fuel to the high pressure pump. Will this not work for the L83?

[solidaxel]

I agree on there "advertising" we should get a discount for promoting there products
or at least a choice!

[toddoky]

Originally Posted by 1gr8ate

I am working on this same swap in my 71 c10 right now. I wound up using the dirty dingo brackets with a f-body ps pump. For the most part I like the way it all fits but hate Dirty Dingo carved their name in everything so blatantly. Wish holley kit was available. I don't have the BCM or Fuel pump module I had just planned on using a Walburo pump with vette filter regulator to supply fuel to the high pressure pump. Will this not work for the L83?

The Holley LT parts are coming soon...I'm hearing March for the availability of the accessory drive kit.

[PowerdbyChevy79]

subscribed....

[87chevy.com]

Originally Posted by 1gr8ate

I don't have the BCM or Fuel pump module I had just planned on using a Walburo pump with vette filter regulator to supply fuel to the high pressure pump. Will this not work for the L83?

No, vette is 58psi.. l83 70 psi

[1gr8ate]

I'm going to try this one from a Audi it's 72 psi. http://www.autozone.com/fuel-deliver...lator/69563_0/

[87chevy.com]

Originally Posted by 1gr8ate

I'm going to try this one from a Audi it's 72 psi. http://www.autozone.com/fuel-deliver...lator/69563_0/

What Audi application?

[1gr8ate]

2010 Audi A3 2.0 turbo72 psi. The r8 spyder runs 87 psi

[Longhornss]

Just checked holleys site. Estimated ship date is 2/7/17 on the pan. The $400 price tag makes it a better option than the vette pan as well.