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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Mar 2006 Posts: 97 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 97 | Thought I'd post the results DYNO Forged 348ci Stock LS6 heads Stock LS6 intake Stock Throttle body Stock pulley Edelbrock 1 3/4 stepped 1 7/8 HVMC headers 223/228 @ .050 108/108 Stock 4L80E with Stock verter 8.5" 10 bolt with 3.73 (riveria wheels) Nitrous to follow: http://performancetrucks.net/forums/showthread.php?t=398925 | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Good curve. What changed between runs?? | | | | | Joined: Mar 2006 Posts: 97 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 97 | Did some air fuel changes and timing adjustments. It needs some more tweaking between 3k and 4k. I think I can fix that dip in torque. I'm also going to make some pulls starting at 1200rpm to get the bottom end of the curve fixed up. Since it's got a small verter in it (stock) I feel I should get that dialed in as well. I also have a couple other changes I'm going to make. I ported a stock throttle body last night and did some clean up as well as ordered an underdrive pulley. Once the motor is broken in fully I'll swap to a synthetic instead of the HD diesel oil I have in it now. I'm hoping to get it to 385rwhp and 375ftlbs. Then the fun begins with the bottle.
1963 Chevy P/U: Forged LS1/4L80E swap and big hit of N20 coming
1973 Camaro: Low compression solid roller LS1 with PT91 turbo Built for the Silver State classic
1967 Convert Continental: Stock Cruiser
| | | | | Joined: May 2005 Posts: 145 Wrench Fetcher | | Wrench Fetcher Joined: May 2005 Posts: 145 | That engine's making a ton of power. Was that at the rollers behind a 4L80e! Nice work!
MV | | | | | Joined: Mar 2006 Posts: 97 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 97 | Yes those are numbers at the rear tires. I have a few changes I will be doing (more than likely after I get married and back from the honeymoon) but the goal is 385rwhp and 375ftlbs.
Right now I am running Delo (HD/Diesel oil) and I will be swaping to Mobil 1 synthetic.
I have a stock crank pulley which I bought a underdrive pulley and waiting for it to come in.
I had a second Throttle body which I just finished porting and filling a big void in it to help air flow.
I'm hoping that does the trick.
1963 Chevy P/U: Forged LS1/4L80E swap and big hit of N20 coming
1973 Camaro: Low compression solid roller LS1 with PT91 turbo Built for the Silver State classic
1967 Convert Continental: Stock Cruiser
| | | | | Joined: Apr 2006 Posts: 159 Shop Shark | | Shop Shark Joined: Apr 2006 Posts: 159 | Super 73 ,
What did you do for wiring,ecm ? I'm in the process of installing a 2006 6.0 w/4L80E in my 61 4x4 Burb and I'm undecided what to do with the harness .Buy a after market or retro the original please share your set up.
Thanks 61 Suburban
In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .
| | | | | Joined: Mar 2006 Posts: 97 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 97 | We used a stock harness and removed the smog wires. If you go to LS1tech in the Hybrid section there is a ton of info there. Also, Performancetrucks.net is another great site. There is an older truck section under specialty vehicles. I go by LIL SS on both sites.
1963 Chevy P/U: Forged LS1/4L80E swap and big hit of N20 coming
1973 Camaro: Low compression solid roller LS1 with PT91 turbo Built for the Silver State classic
1967 Convert Continental: Stock Cruiser
| | | | | Joined: Aug 2007 Posts: 23 New Guy | | New Guy Joined: Aug 2007 Posts: 23 | How come in neither run do the torque and hp curves cross at 5252RPM? And the crossovers occur at different RPM for the two tests? | | | | | Joined: Mar 2006 Posts: 97 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 97 | Kevin,
I did not notice this. I'm wondering if the tach was not reading right on the dyno. I'll be back there in 3 weeks after my honeymoon (getting married on Sunday). I need to swap out the Delo oil for synthetic, put on an underdrive pulley and a ported throttle body. I'm going to make 4 back to back pulls to see what kind of TQ/HP each one gives if any. So I'll take a closer look at the RPM when I am there again.
1963 Chevy P/U: Forged LS1/4L80E swap and big hit of N20 coming
1973 Camaro: Low compression solid roller LS1 with PT91 turbo Built for the Silver State classic
1967 Convert Continental: Stock Cruiser
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