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Author Topic:   Hurtin' unit
MikeN
Dirt Full Roller

Total posts: 27
posted August 16, 2004 01:22 PM  
A friend of mine got in a fenderless-bender with his mod Saturday. The car is a TRC that was originally a 4 link. The previous owner had a swing arm J. rear clip installed. (The Specialty Fab. chassis is somewhat of a cult object where we race. There nuts about those things. It's the chassis version of "I'm cookoo for Cocoa-Puffs!) Anyway, I pulled the right front apart yesterday to reveal a 1200lb spring.
This car was never a champagne racer, which is what I would think from that spring. I can't tell the difference by looking at it, but I believe it's a metric front clip.
Now, Are you ready for my question? How 'bout now? My question is.. Is it wrong
of me to be thinking it should have about 200-300lbs less spring?
I was thinking a 900 or 950 L.F. and a 1000 R.F. for starters.
What are your thoughts?

mod70
unregistered Total posts: 27
posted August 16, 2004 01:46 PM           send a private message to MikeN   Edit/Delete Message   Reply w/QuoteBBBBBB
Sound way high to me. That would belong in a street stock. I'd say your average mod RF spring would be between 750# to 950#

avenger 11
Dirt Forum Racer

Total posts: 88
posted August 16, 2004 04:59 PM  
I think the Larson car uses 1400 lf,1600 rf with a metric stub.

AZ Mod82
Dirt Roller

Total posts: 9
posted August 16, 2004 08:58 PM  
quote:
Originally posted by avenger 11:
I think the Larson car uses 1400 lf,1600 rf with a metric stub.

Larson cars are a canta lever front suspension so they need that much spring AZ MOD 82

JT54
Dirt Maniac

Total posts: 170
posted August 16, 2004 09:38 PM  
Sounds a bit high ,900 lt and 1000 rt work for starters.

dirtracer14
Dirt Forum Champ
Total posts: 1261
posted August 16, 2004 10:46 PM  
I ran from a 1200 to a 1450 with my metric clip car and it was fast!!

dirtslinger66
Dirt Maniac

Total posts: 200
posted August 18, 2004 07:50 AM  
I run a 650 left and a 750 right and it works fine

jdj9410
Dirt Full Roller

Total posts: 65
posted August 18, 2004 08:36 AM  
Metrics run higher springs than 68-72. Metric mid size are around 1,000 while 68-72 is around 700. Has to do with width and susp points.

avenger 11
Dirt Forum Racer

Total posts: 88
posted August 18, 2004 09:35 PM  
AZ Mod82,Larson cars just have the front shocks mounted inboard on a lever system,which would not affect spring rate.

vince88
Dirt Full Roller

Total posts: 43
posted August 20, 2004 01:09 PM  
my car has metric front and would bottem out the lower a plate with less than 900# spring

mod70
unregistered Total posts: 43
posted August 21, 2004 01:04 AM           send a private message to vince88   Edit/Delete Message   Reply w/QuoteBBBBBB
Hoffman '01 metric - 750 LF 850 RF, and no problems.

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