67 L99 4L80 Project - Chevelle Tech
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post #1 of 101 (permalink) Old Jan 1st, 12, 10:54 PM Thread Starter
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67 L99 4L80 Project

I'm just starting on my project so I thought I'd post some info and pics.

This was my sister in law's driver for several years until she retired it about 10 years ago. The car has rust in all the usual places (i.e. rear quarters, trunk drops, wheel wells, back glass, a little in the trunk pan, etc). The trough in the panel under the filler panel behind the back glass was rusted completely though. The back glass has been leaking for years.

The victim.
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Last edited by rpol78; Jan 1st, 12 at 11:30 PM.
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post #2 of 101 (permalink) Old Jan 1st, 12, 11:00 PM Thread Starter
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Re: 67 L99 4L80 Project

Let the games begin.
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post #3 of 101 (permalink) Old Jan 1st, 12, 11:05 PM Thread Starter
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Re: 67 L99 4L80 Project

My sister in law keeps telling me how much power the car has and how well it handles. Wait until these are installed. Then we're starting to talk about power.

The L99 is out of a 2010 Camaro with 125 miles on it before it was replaced with a LS7 and the 4L80 is a GM rebuilt tranny. I also have a '67 12 bolt housing and a new eaton posi. I'm thinking either 3:55 or 3:73 gears

The current thinking to go along with the drive train is:

DSE suspension (Possibly ATS spindles)
Kore Brakes
17 x 8 w 245s and 17 x 9.5 with 275s or 285s (may shift to 18s rather than 17s)
Stock black interior - w/buckets
Marina Blue - Possibly with SS badging.
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Last edited by rpol78; Jan 1st, 12 at 11:27 PM.
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post #4 of 101 (permalink) Old Jan 18th, 16, 7:45 PM Thread Starter
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Re: 67 L99 T56 Project

Well the project has been moving mighty slow but there has been some progress. I've decided to change my choices a little.

For frame boxing I used the inner sections out of a damaged El Camino frame. Kind of like the FX kit so it should be at least as strong if not stronger. I also used the rear sections from ABC Performance. At this point the frame is pretty rigid.

- Mini tubs (should have decided this before I put new inner fenders in)
- 275/35/18 up front and 335/30/18 out back (gotta love them big tires)
- T56 Magnum (gotta have the man pedal)
- Magnacharger (I told my brother when I was 14 I wanted to blow the car)
- DSE suspension - dual adjustable coil overs front and rear
- Wilwood brakes 14" front 13" rear

Here's some shots of where I'm at on it. Should get the body back from the media blasters this week.
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Last edited by rpol78; Jan 18th, 16 at 8:01 PM.
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post #5 of 101 (permalink) Old Jan 19th, 16, 5:04 AM
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Re: 67 L99 4L80 Project

Wow this is gonna be Bad As-!!
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post #6 of 101 (permalink) Old Jan 19th, 16, 7:48 AM
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Re: 67 L99 4L80 Project

Sweet, building a 67 myself. Interested to see what mounts you use and also how that 4L80E fits in the tunnel!
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post #7 of 101 (permalink) Old Jan 19th, 16, 10:27 AM Thread Starter
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Re: 67 L99 4L80 Project

Quote:
Originally Posted by ChuckD396 View Post
Sweet, building a 67 myself. Interested to see what mounts you use and also how that 4L80E fits in the tunnel!

On LS1Tech there's a couple of builds that used the 4l80 with very minor mods (i.e. big hammer where the cooler lines come out) so you may want to check over there as well as some of the builds here.

I ended up selling the 4L80 and bought a T56 Magnum. Originally I didn't want to do it because of the tunnel surgery but..... I plan on street driving and possibly autocross vs drag racing so the T56 ought to be better for that. If my calcs are right I think the 3.42 rear gears I have in the 12 bolt will be ok. The final drive ratio is slightly better than 4:11s with a close ratio muncie with a 2:20 first gear (i.e. 9.04:1). I bought the close ratio T56 which has the 2.66:1 first gear so with it and the 3:42s I'll be at 9.09 final drive ratio. Plus the magnacharger will make loads of torque down low. Also I should be able to cruise at 65 at 1800 rpm in 6th.

On the mounts, I have the Edelbrock mount kit that I'm going to use to initially position the engine/transmission. From there I'll trial fit the Flowmaster headers to make sure they fit. Ultimately I plan on making my own so I can move them back to align with the front cross member to give room to mount the AC compressor low on the passenger side. I'm planning on using 4th gen Camaro clam shell LS mounts on the block and build my own frame mounts.
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post #8 of 101 (permalink) Old Jan 19th, 16, 10:38 AM
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Re: 67 L99 4L80 Project

Coming along nicely.
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post #9 of 101 (permalink) Old Jan 19th, 16, 12:15 PM
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Mike
 
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Re: 67 L99 T56 Project

Quote:
Originally Posted by rpol78 View Post
Well the project has been moving mighty slow but there has been some progress. I've decided to change my choices a little.

For frame boxing I used the inner sections out of a damaged El Camino frame. Kind of like the FX kit so it should be at least as strong if not stronger. I also used the rear sections from ABC Performance. At this point the frame is pretty rigid.

- Mini tubs (should have decided this before I put new inner fenders in)
- 275/35/18 up front and 335/30/18 out back (gotta love them big tires)
- T56 Magnum (gotta have the man pedal)
- Magnacharger (I told my brother when I was 14 I wanted to blow the car)
- DSE suspension - dual adjustable coil overs front and rear
- Wilwood brakes 14" front 13" rear

Here's some shots of where I'm at on it. Should get the body back from the media blasters this week.

Awesome list, I will be watching for sure! Where did you find the 335/18 KDW's? They have been impossible to get for some time.

Mike

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post #10 of 101 (permalink) Old Jan 19th, 16, 12:38 PM Thread Starter
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Re: 67 L99 T56 Project

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Originally Posted by Mike McMasters View Post
Awesome list, I will be watching for sure! Where did you find the 335/18 KDW's? They have been impossible to get for some time.

Mike
I bought the 335s from a guy on the pro-touring site that decided he wanted to go to 19" for his Trans-Am. He is out of Canada so I got stuck with shipping + duties. They were a little expensive but I really like the tread pattern plus they are new and never mounted.

Also, I had a set of 285/40/18 and 255/40/18 KDWs that I bought off of craigslist locally for the car. Initially I was going to use the 255s for the front so I wanted the rears to match them. After getting the 335s and doing more research (especially Tom's '66), I decided to move to the 275/35/18s for the front.

I guess after selling the 285s and 255s I didn't come out so bad.
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post #11 of 101 (permalink) Old Jan 19th, 16, 10:59 PM
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Re: 67 L99 4L80 Project

I really liked the tread pattern too but I wasn't lucky enough to find a set

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post #12 of 101 (permalink) Old Jan 20th, 16, 12:56 PM
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Re: 67 L99 T56 Project

Quote:
Originally Posted by rpol78 View Post
I bought the 335s from a guy on the pro-touring site that decided he wanted to go to 19" for his Trans-Am. He is out of Canada so I got stuck with shipping + duties. They were a little expensive but I really like the tread pattern plus they are new and never mounted.

Also, I had a set of 285/40/18 and 255/40/18 KDWs that I bought off of craigslist locally for the car. Initially I was going to use the 255s for the front so I wanted the rears to match them. After getting the 335s and doing more research (especially Tom's '66), I decided to move to the 275/35/18s for the front.

I guess after selling the 285s and 255s I didn't come out so bad.
What size wheel and back spacing do you have for the front and how are you getting a tire that wide to clear? My 17x8 with 4.5" bs and a 255/50 rubbed the top inner fender on the outside edge close to where the outer fender ties to it. My car was about 2-2.5" lower than stock at the time.

In the rear I am banking a 20x10 and a 275/35 is the best size unless you mini tub it.
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post #13 of 101 (permalink) Old Jan 20th, 16, 3:22 PM Thread Starter
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Re: 67 L99 T56 Project

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Originally Posted by ChuckD396 View Post
What size wheel and back spacing do you have for the front and how are you getting a tire that wide to clear? My 17x8 with 4.5" bs and a 255/50 rubbed the top inner fender on the outside edge close to where the outer fender ties to it. My car was about 2-2.5" lower than stock at the time.

In the rear I am banking a 20x10 and a 275/35 is the best size unless you mini tub it.
I haven't ran them but I'm basing this on a couple of others (It seems like 1 was an El Camino and the other was a '66 or '67 running 275s all the way around) and on Tom's 66 - "front: 18x9.5" with 6.5" BS with a 275/35-18. If we had it to do over again and Vintage Wheel Works offered it, we would go with a 9" on the front with a 6" or 5.75" BS. Right now I have a small amount of rubbing on the anti-swaybar at full turn. We're also running a splined anti-swaybar which gives us a little more clearance than a standard tubular bent bar. We also had to run a 1/8" spacer for our wheels to clear the C5/Baer brake calipers."

On the rears, I've heard a 285 is the widest without mini tubbing (I believe Tom was running those before he mini tubbed). Originally that was my path but my buddy talked me into mini tubbing and now I'm half pregnant .... or maybe a little more since I already bought the rear tires. 20's might be a little different because of the tire height.

I'm thinking about getting a WheelFit tool before ordering wheels to ensure clearance since the Wilwood brakes add a little to the track width.

Ted

Last edited by rpol78; Jan 20th, 16 at 3:59 PM.
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post #14 of 101 (permalink) Old Jan 21st, 16, 1:14 PM
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Re: 67 L99 T56 Project

Quote:
Originally Posted by rpol78 View Post
I'm thinking about getting a WheelFit tool before ordering wheels to ensure clearance since the Wilwood brakes add a little to the track width.
Ted
How much does the wilwood brakes set the wheel out from the stock setting?

Which wilwood setup are you using?
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post #15 of 101 (permalink) Old Jan 21st, 16, 1:34 PM
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Re: 67 L99 4L80 Project

Looks great so far!

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