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Old 05-11-2012, 04:16 AM   #1 (permalink)
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LS1 Coupe is alive!!!

I got the LS1 running today. It is still not running quite right but it starts every time. With the aluminum flywheel it revs very quickly, now to get it to idle better. There is still lots to do, but the list is getting shorter.

Video:
LS1.Daytona.1st.start.mp4 - YouTube
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FFR Coupe #340, 2003 LS1 350 RWHP, T56 6 speed, QT BH, Champ 10.5 QT pan, 5 Lug and AC, SAI mod, Nitto NT-01's 275/315 ..Licensed for 28k..Just over 30k w/race tires and many mods
http://s464.photobucket.com/albums/rr2/mmarshall01/
http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011, 2012, and 2013 St Louis region XP Champion

Last edited by mmarshall; 05-11-2012 at 12:21 PM..
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Old 05-11-2012, 02:12 PM   #2 (permalink)
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Mike I'm still a purist but I do have to say that Chevy fits in there very nicely! :-) Sounds good too!
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Old 05-11-2012, 02:38 PM   #3 (permalink)
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Icon21 Looks Good

Hi,
It will run alot better with the exhaust on it, needs backpressure for the oxygen sensors to work properly.
Perry.
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Old 05-11-2012, 02:38 PM   #4 (permalink)
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Marshal,

Great job, like Russ I'm a purist, but I truly appreciate the uniqueness of your build and choices. You should post on the other forum so the guys over there can see also.

Hank
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Horsepower is how fast you hit the wall and torque is how far you take the wall with you.
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Old 05-11-2012, 03:40 PM   #5 (permalink)
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Fire in the hole!
Nice Mike well done. How's the exhaust coming?

John
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Old 05-11-2012, 05:31 PM   #6 (permalink)
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Quote:
Originally Posted by John Dol View Post
Fire in the hole!
Nice Mike well done. How's the exhaust coming?

John
John it is not coming along at all. I am embarrassed to admit this, but I failed to research the rule book well enough. I was reading through the SCCA rules on another matter and re-read the XP exhaust rules which have no restrictions......except for the fine print that says to comply with the safety inspection. I jumped to that section and found the the exhaust has to exit behind the driver, or out the side. This ruined my whole day bigtime!!!!! So out came the saw and I am currently working on plan B and have figured out a plan C just in case.

Perry thanks for the advice. Russ and Hank I fully understand the true artwork you guys are capable of. Thanks for the cudos even though my build goes against the grain.

Time to go weld some stainless!!!!
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FFR Coupe #340, 2003 LS1 350 RWHP, T56 6 speed, QT BH, Champ 10.5 QT pan, 5 Lug and AC, SAI mod, Nitto NT-01's 275/315 ..Licensed for 28k..Just over 30k w/race tires and many mods
http://s464.photobucket.com/albums/rr2/mmarshall01/
http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011, 2012, and 2013 St Louis region XP Champion
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Old 05-11-2012, 06:51 PM   #7 (permalink)
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Mike,

FWIW: You're building my dream coupe. Always thought the aluminum motor would be PRIMO!

Meantime, hard to believe that's not muffled. I was 'gonna say it sounded too civilized.

Sweet! Keep us posted.
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Old 05-11-2012, 06:57 PM   #8 (permalink)
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Old 05-11-2012, 07:06 PM   #9 (permalink)
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Nice work!
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Old 05-11-2012, 10:12 PM   #10 (permalink)
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Wahoo!! Congrats on the big milestone.
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Old 05-11-2012, 11:11 PM   #11 (permalink)
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Mike,

Congrats on the milestone! Sounds good and looks good (can't believe I'm saying that as I'm a blue oval kind of guy). Well done!

Garry
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Old 05-11-2012, 11:11 PM   #12 (permalink)
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New exhaust pics:



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Mike
FFR Coupe #340, 2003 LS1 350 RWHP, T56 6 speed, QT BH, Champ 10.5 QT pan, 5 Lug and AC, SAI mod, Nitto NT-01's 275/315 ..Licensed for 28k..Just over 30k w/race tires and many mods
http://s464.photobucket.com/albums/rr2/mmarshall01/
http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011, 2012, and 2013 St Louis region XP Champion
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Old 05-12-2012, 03:56 PM   #13 (permalink)
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Mike,

I think it is coming along pretty well.

As a know-nothing neophyte, it seems to me that it runs extremely smooth and responsive.

Bob
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Old 05-23-2012, 07:05 AM   #14 (permalink)
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Any ideas what could be causing your Idle problem?

I've worked on a few LS1's with different cam/lifter/pushrod geometries, on the open loop tunes.... They can be problematic to say the least but are easily correctable by some general knowledge and a laptop tuning program.

If your issue exists in a mechanical manifestation, Vacuum would be First guess.

Great build, I really applaud you for going against the grain here. Good job!
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Old 05-25-2012, 04:44 PM   #15 (permalink)
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Is the MAF sensor placed right in front of the throttle body?
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Old 05-25-2012, 05:42 PM   #16 (permalink)
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It was close to the throttle body but is further away now. Now the idle is very high does not rev freely. I will get it on the dyno when I get back in town from vacation. The original problem was from a vacuum leak off of the port for the brake booster.
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FFR Coupe #340, 2003 LS1 350 RWHP, T56 6 speed, QT BH, Champ 10.5 QT pan, 5 Lug and AC, SAI mod, Nitto NT-01's 275/315 ..Licensed for 28k..Just over 30k w/race tires and many mods
http://s464.photobucket.com/albums/rr2/mmarshall01/
http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011, 2012, and 2013 St Louis region XP Champion
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