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litle88 · 08-18-2013, 02:35 PM

A broken spring can happen on a DD, choosing your valve train correctly for the auto cross is a must.
The NF cam doesn't have aggressive lobes, I think Tbone would be ok with some morel high rpm linkbar lifters, some bad azz chromoly 3/8 pushrods and the correct spring I think he'll be ok. IMHO.

Synner · 08-18-2013, 02:46 PM

I agree valvetrain selection is critical but I still think its a lot riskier proposition than it needs to be. It's around what, .63x lift? Haven't seen anyone spec something that high lift on stock cubes for road racing. I don't think the increased risk of a dropped valve is worth 10hp on the top end. When even Lethal has said they'd use something else for road racing I don't see why anyone would still go that route. Unless you're looking for an excuse to replace a motor with a big ole ERL sleeved block but your wife won't let you until you grenade the one you got.

thahemp · 08-18-2013, 02:59 PM

Did lethal say why they wouldn't use it for the road course? I'd like to hear their thoughts on it. Screw the 10 peak hp... It's the torque table i'm interested in. With the right suspension i would think it could be ideal. Maybe TBone will be our guinea pig!

Supercharged SS · 08-18-2013, 03:00 PM

Quote:

Originally Posted by Mchlgrrsn

Took the car out late last night, coming home from a buddies house. It was 60 degrees. It is night and day how much better my car runs in cooler weather. I know why but I didn't think it would this noticeable. I just need to find a late night drag strip, open 24 hours. Lol.

Island on Friday nights. I think theyll let yiu run until 11. Only 40 cars there last Friday. I'm gonna go down with nyny69 once my car is fixed. I'm tired if hearing him bitch about driving to Lebanon. Ill give you a week or so notice before I go.

Mydivorcegift · 08-18-2013, 03:05 PM

Quote:

Originally Posted by Mchlgrrsn

I just need to find a late night drag strip, open 24 hours. Lol.

And a driver mod lol

Synner · 08-18-2013, 03:06 PM

Lobe/lift. It does have a great torque curve but the way they get their power is not focused on high rpm stability which would only matter on a road course. Ordered my Brian Tooley spec'd cam over the weekend and I can assure you it won't be anywhere near .63x lift. Its just depressing its another 2.5 months before I can install it.

thahemp · 08-18-2013, 03:15 PM

Makes enough sense i suppose. I guess racing is expensive enough as it is without throwing expensive valvetrain maintenance on the pile. Replacing the springs frequently would get old pretty quick.

litle88 · 08-18-2013, 03:50 PM

Quote:

Originally Posted by Synner

Lobe/lift. It does have a great torque curve but the way they get their power is not focused on high rpm stability which would only matter on a road course. Ordered my Brian Tooley spec'd cam over the weekend and I can assure you it won't be anywhere near .63x lift. Its just depressing its another 2.5 months before I can install it.

Oh yea, there are options for sure, a custom specd cam from BTR would ultimately be the best route. If he does heads some bump in compression for some free TQ would help too.

Supercharged SS · 08-18-2013, 04:10 PM

Quote:

Originally Posted by thahemp

Makes enough sense i suppose. I guess racing is expensive enough as it is without throwing expensive valvetrain maintenance on the pile. Replacing the springs frequently would get old pretty quick.

Unless you're doing a ton of racing or just beating the balls off it everyday you don't need to replace the springs every year.

I do have the springs changed out before each season just as preventative maintenance. Every year for the last three the car has seen over 150 passes so it was a no brainier.

thahemp · 08-18-2013, 04:20 PM

Road course could be the equivalent or higher though in 1 session to 150 passes. These guys replace their brakes constantly!

Supercharged SS · 08-18-2013, 04:24 PM

Quote:

Originally Posted by thahemp

Road course could be the equivalent or higher though in 1 session to 150 passes. These guys replace their brakes constantly!

Yeah, any type of reaching I would change springs. It's not a bunch if money but something else to help prevent a major problem.

I didn't read the page before so I'm not sure how the spring change discussion started.

thahemp · 08-18-2013, 04:29 PM

We were just discussing why the night fury might not be ideal for the road course.

Supercharged SS · 08-18-2013, 04:33 PM

Quote:

Originally Posted by thahemp

We were just discussing why the night fury might not be ideal for the road course.

My knowledge < road coursing. Sorry

thahemp · 08-18-2013, 04:36 PM

Same here. It looks like a blast though.

08-18-2013, 02:35 PM	#5069
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	A broken spring can happen on a DD, choosing your valve train correctly for the auto cross is a must. The NF cam doesn't have aggressive lobes, I think Tbone would be ok with some morel high rpm linkbar lifters, some bad azz chromoly 3/8 pushrods and the correct spring I think he'll be ok. IMHO. __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

08-18-2013, 02:59 PM	#5071
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Did lethal say why they wouldn't use it for the road course? I'd like to hear their thoughts on it. Screw the 10 peak hp... It's the torque table i'm interested in. With the right suspension i would think it could be ideal. Maybe TBone will be our guinea pig! __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

08-18-2013, 03:15 PM	#5075
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Makes enough sense i suppose. I guess racing is expensive enough as it is without throwing expensive valvetrain maintenance on the pile. Replacing the springs frequently would get old pretty quick. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

08-18-2013, 04:20 PM	#5078
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Road course could be the equivalent or higher though in 1 session to 150 passes. These guys replace their brakes constantly! __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

08-18-2013, 04:29 PM	#5080
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	We were just discussing why the night fury might not be ideal for the road course. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

08-18-2013, 02:46 PM	#5070
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,542	I agree valvetrain selection is critical but I still think its a lot riskier proposition than it needs to be. It's around what, .63x lift? Haven't seen anyone spec something that high lift on stock cubes for road racing. I don't think the increased risk of a dropped valve is worth 10hp on the top end. When even Lethal has said they'd use something else for road racing I don't see why anyone would still go that route. Unless you're looking for an excuse to replace a motor with a big ole ERL sleeved block but your wife won't let you until you grenade the one you got.

08-18-2013, 03:06 PM	#5074
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,542	Lobe/lift. It does have a great torque curve but the way they get their power is not focused on high rpm stability which would only matter on a road course. Ordered my Brian Tooley spec'd cam over the weekend and I can assure you it won't be anywhere near .63x lift. Its just depressing its another 2.5 months before I can install it.

08-18-2013, 04:36 PM	#5082
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Same here. It looks like a blast though. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x