LS Swap in 78 Vette
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
LS Swap in 78 Vette Going to Swap a LQ9 into my 78 Vette. I plan in using my 2004R, 2800 RPM stall so hoping that will work with this combo. Need to swap to LS6 manifold for hood clearance and will need TB converted to DBC. Going to convert the power steering to a jeep box and replace all the bushings and rubber in the front A arms. Currently have the old engine and trans pulled and cleaning and painting the engine bay. Lastly upgrading my A/C to Vintage or Classic Air. Looking for weekend cruiser around 450 HP.
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
Seriously considering the Classic air upgrade. Less $ and simpler system. Will talk with them about my project tomorrow. Can get compressor and mount from them.
Need to get a alt/ps with correct bracket for this swap. Looking at the Holley PART #: 20-135
Need to decide which manifold to swap to LS1-LS2 or LS 6
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
I have a Holley 550-400 efi system I purchased for my pre LS swap. Can I use this for the LQ9. It was for a throttle body so can the harness with a few mods be made to work? This is the harness I need. http://www.holley.com/558-102.asp
Last edited by donnie_19; Jan 6, 2013 at 03:05 PM.
Have the engine in the shop now. Worked on cleaning engine bay yesterday and getting close to painting. A Arms are painted and bushings and ball joints installed. Got a media blast cabinet on the way to finish cleaning up the remaining parts for paint.
Seriously considering the Classic air upgrade. Less $ and simpler system. Will talk with them about my project tomorrow. Can get compressor and mount from them.
Need to get a alt/ps with correct bracket for this swap. Looking at the Holley PART #: 20-135
Need to decide which manifold to swap to LS1-LS2 or LS 6
Seriously considering the Classic air upgrade. Less $ and simpler system. Will talk with them about my project tomorrow. Can get compressor and mount from them.
Need to get a alt/ps with correct bracket for this swap. Looking at the Holley PART #: 20-135
Need to decide which manifold to swap to LS1-LS2 or LS 6
Going to Swap a LQ9 into my 78 Vette. I plan in using my 2004R, 2800 RPM stall so hoping that will work with this combo. Need to swap to LS6 manifold for hood clearance and will need TB converted to DBC. Going to convert the power steering to a jeep box and replace all the bushings and rubber in the front A arms. Currently have the old engine and trans pulled and cleaning and painting the engine bay. Lastly upgrading my A/C to Vintage or Classic Air. Looking for weekend cruiser around 450 HP.
Go with the LS6 manifold if you can...it's the best performing one of those you listed.
Good luck with the swap.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo The injectors will physically fit, but I'm not sure what they're rated at. I think stock F-body and Corvette injectors are 28lbs. If they are different, you'd need a retune on your computer...you should be able to search around on the site here and find out pretty quick. Just make sure the fuel rails will also fit.
Truck flex fuel injectors are a direct fit on the LS1/6 manifold. You can use the non-flex fuel ones by removing the plastic tip. The LS1/6 fuel rail wont reach the shorter truck injectors and the truck rail is too tall for your hood.
You'll need aftermarket rails with the truck injectors or LS1 injectors with the LS1 rail.
Flex fuel injectors on an LS1 intake, aftermarket rails.
You'll need aftermarket rails with the truck injectors or LS1 injectors with the LS1 rail.
Flex fuel injectors on an LS1 intake, aftermarket rails.
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
Thanks, I found a few on flea bay so and am going to need a DBC TB any way. What extra parts besides rails will in need to make this one work? Member on this forum has it for sale
http://www.ebay.com/itm/BBK-SSI-5005...d9ac15&vxp=mtr
http://www.ebay.com/itm/BBK-SSI-5005...d9ac15&vxp=mtr
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
You should be able to get a stock DBC throttle body for $50 or so on here. I have a spare one outside, but I think it's missing a couple screws for the throttle blade. I used a Lokar cable for mine with a stock LS mount.
Go with the LS6 manifold if you can...it's the best performing one of those you listed.
Good luck with the swap.
Go with the LS6 manifold if you can...it's the best performing one of those you listed.
Good luck with the swap.
Fancy looking intake, any info on if it flows better than an LS1/6 intake? Also might want to check if TV cable hookup works with aftertmarket TB.
You'll need EGR blockoff, bolts, and set of gaskets.
You'll need EGR blockoff, bolts, and set of gaskets.
Thanks, I found a few on flea bay so and am going to need a DBC TB any way. What extra parts besides rails will in need to make this one work? Member on this forum has it for sale
http://www.ebay.com/itm/BBK-SSI-5005...d9ac15&vxp=mtr
http://www.ebay.com/itm/BBK-SSI-5005...d9ac15&vxp=mtr
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
Truck flex fuel injectors are a direct fit on the LS1/6 manifold. You can use the non-flex fuel ones by removing the plastic tip. The LS1/6 fuel rail wont reach the shorter truck injectors and the truck rail is too tall for your hood.
You'll need aftermarket rails with the truck injectors or LS1 injectors with the LS1 rail.
Flex fuel injectors on an LS1 intake, aftermarket rails.
You'll need aftermarket rails with the truck injectors or LS1 injectors with the LS1 rail.
Flex fuel injectors on an LS1 intake, aftermarket rails.
Thread Starter
On The Tree
Joined: Dec 2012
Posts: 177
Likes: 0
From: Troy, MO
What transmissions did you use? I have a good 2004R I want to use.
Looking for better insulation under the floor boards already have the foil insulation inside. Any suggestions for the bottom side?
Looking for better insulation under the floor boards already have the foil insulation inside. Any suggestions for the bottom side?
Last edited by donnie_19; Jan 10, 2013 at 07:44 AM.
I'm running a richmond 6 speed.
On insulation, I used reflexit throughout the cabin. Really keeps my legs cooler. Mine is a convertible with sidepipes, so I did not bother with noise insulation. On the Olds, I layered fatmat, reflexit, OEM sound deadener, then jute back carpet. It's very quiet and comfortable.
On insulation, I used reflexit throughout the cabin. Really keeps my legs cooler. Mine is a convertible with sidepipes, so I did not bother with noise insulation. On the Olds, I layered fatmat, reflexit, OEM sound deadener, then jute back carpet. It's very quiet and comfortable.