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Thread: high mileage power loss????
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03-20-2007, 08:19 PM #1
- Join Date
- Feb 2007
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- vivian, la
- Posts
- 68
black- 1999 Trans Am
high mileage power loss????
me and a guy were talkin at the track the other day about how much power was lost on high mileage ls1's so i was wondering if anybody knew or possibly had some dyno numbers of a high mileage ls1
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03-21-2007, 01:13 PM #2
- Join Date
- Oct 2006
- Location
- St. Clair Shores. Michigan
- Age
- 55
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- 1,602
Navy Blue Metallic- `98 Formula M6 HdTp
I dynoed my Car last Spring at 109,000 miles. Mods are SLP Lid, FRA & EGR Free mods, SOTL Flowmaster Catback and an Original Clutch
Numbers are from a Dynapack Dyno
300 RWHP @ 5300 rpm
322 RWTQ @ 4200 rpm
I realize these numbers are on the low side but the engine is tired.
I am the original owner and the car has felt stronger in the past but over the last 30k or so has softened up a bit. A new set of valvesprings would probably go a long way towards bringing back lost power. But why change valvsprings with out changing the camshaft as well !Craig
Semi Retired Street Racer
2012 Lava Red Mustang GT Coupe Brembo/3.73's
Build Date 3/17/11, Last Lava Red GT
Gone but not forgoten
NBM `98 Formula M6 HdTp
1 of 1 Build Date 3/12/98
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03-21-2007, 04:46 PM #3
- Join Date
- Mar 2006
- Location
- LS1 land
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- 36
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- 1,666
not real high miles, but i have 78,000 and make good power
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03-25-2007, 06:50 PM #4
- Join Date
- Sep 2006
- Location
- Shreveport, LA
- Age
- 38
- Posts
- 297
Black on black.- 2001 WS6 M6 (stock)
Man, I started a thread on LS1tech.com JUST LIKE THIS! Here ya go...
http://ls1tech.com/forums/showthread.php?t=659775
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03-26-2007, 07:23 AM #5
I ran a 13.30 with 112,000
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03-26-2007, 07:41 PM #6
Obviously shit is going to wear out, but if you maintain your motor and other aspects, your car is going to make power long in life. I have heard of 350,000 mile LS1's making good power with mods. Just my experience though
┌∩┐(◕_◕)┌∩┐
Man: The Mods you are fighting,
they are the biggest Men I have ever seen. I
wouldn't want to fight them!
Me: That is why no one will remember your name!
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03-26-2007, 07:53 PM #7
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03-26-2007, 08:24 PM #8
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07-04-2007, 03:08 PM #9
127K miles
I have now 130,xxx miles on mine 01 LS1 small cam minor stock head work dynoed at 350 RWHP. Not bad I am experiencing a rattle from the passenger side not a lose heat shield and I have tapped the cataluytic convertoer lightly with a rubber mallet nothing there??? I'm still looking there the original cats so I'm thinking maybe it's starting to clog - I've read somethings where that might cause it only happening in the 1800 to 2200 RPM range? But still going like a champ!
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