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Juicy's LS3 C5Z build... fotos and stuff


JuicedH22

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That is where I will be hurting on the top end, and be better off mid range... 1 3/4 primaries, which is also why I have custom exhaust valves, sized for that primary dia.

 

stock water pump (which will give me some parasitic loss), and as stated in the list, my UD is an ATI 10/10 underdrive

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That is where I will be hurting on the top end, and be better off mid range... 1 3/4 primaries, which is also why I have custom exhaust valves, sized for that primary dia.

 

stock water pump (which will give me some parasitic loss), and as stated in the list, my UD is an ATI 10/10 underdrive

 

 

You will see a nice plateau up top with the 1 3/4. They are really holding you back, I could see 20rwhp with 1 7/8 step to 2inches.

 

it should be a strong setup, who is tuning the car?

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  • 2 weeks later...

To say I am glad to have my car back up and running, is an understatement. :biggrin:

 

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/davesZ06_041.jpg

 

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/davesZ06_042.jpg

 

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/davesZ06_043.jpg

 

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/davesZ06_045.jpg

 

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/davesZ06_044.jpg

 

Ride height set, just needs corner weighted and aligned.

 

I got the VE table pretty solid, just need to do some dyno tuning for WOT power... will post results when I have them!

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Lots of DYNO STUFFS!

 

 

So I got hte car dyno tuned, and i have a plethora of results to share... I am also in the middle of doing a "Cincinnati Dyno Comparison" just because...

 

Before charts, here are the results:

 

Cincy Speed: (dynojet)

500/463 with the mufflers detached (still has the 3"- 2.5" restriction, but no mufflers)

494/456 as the car sits with exhaust. (I will get into the details of why I detached hte exhaust shortly)

 

TPR: (DynaPack)

517/490 as the car sits - Hell yea! take that Kevin Doe :lol:

 

Let me say that what really impresses me, is the torque. I am making nearly 400 ft*lbs by 3k rpm... and dont drop below that until 6700rpm.

 

The HP is a littler lower than I was 'hoping' but still great. And I have the strongest suspicion this is due to the smaller primaries than ideal.

 

On to dyno plot fun....

 

Before and After engine swap...

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_7.jpg

 

Final tune - blue / No mufflers - green

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_3-1.jpg

As you can see the stock Ti mufflers are pretty good. I only picked up 6 peak hp, and 7 ft*lbs of tq. BUT in the low/mid range I picked up +20 ft*lbs with the exhaust off.

 

The reason I took the exhaust off (as well as the MAF/intake) was because it was noticible in the datalogging that I was chocking the engine in the upper rpm (i will have that plot later), so was trying to trace it down. I believe the largest contributer of this, is the 1 3/4" primaries that I have, opposed to the 1 7/8" that most LS3 guys run. It seems to be costing me top end HP, but I am getting pretty impressive midrange tq with them.

 

Here is the plot comparison of MAF/air intake attached vs detatched (blue is detached)

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_4.jpg

As you can see I actually LOST hp and tq by removing the MAF and air bridge. This is mostly likely because the air is no longer able to be kepted at a smooth/laminar transition into the throttle body. Also, if you're wondering, my car is in open-loop speed density, so I am not using the MAF (just the IAT inside it)

 

Another interesting plot, is to show what dyno tuning can get you. The blue line is just a basic 'street tune' getting the VE table set to where we wanted it. The red line is modifying the commanded AFR as well as spark, to get power...

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_6.jpg

 

 

 

Some more comparison plots at Cincy Speed, I did this to try show an 'apples to apples' comparison of my build to other similar LS3 builds on the same dyno

Red - me

Blue - c6 LS3 with similar cam specs (BooSSt), intake, 1 7/8" headers and full 3" exhaust... (stock heads)

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_G6X3BooSStVette.jpg

 

Red - me

Green - 2010 Camaro with nearly the same mods as me (G6X3, 2" headers, 3" exhaust, FAST, etc...) - note camaro will have higher drivetrain loss.

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_G6X3Camaro.jpg

 

Red - me

Green - completely stock LS3 c6 corvette

Blue - tune only LS3 corvette (same car)

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_LS3VetteStock.jpg

 

 

 

On to playing with the dyno.. :lol: (all these are final tune in red, and no mufflers in blue)

 

changing from SAE correction, to STD correction, haha

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_STD.jpg

 

And uncorrected...

http://i30.photobucket.com/albums/c318/Juicedh22/zo6ftw/Dave_Dyno_Pulls_Uncorrected.jpg

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