dutinsss

iTrader: (2)

i was just wondering if chromoly suspension parts worth the extra money over the mild steel parts?

dutinsss

iTrader: (2)

and also, i'm leaning towards UMI or spohn. if they're close to the same in quality i'll go with UMI for the price. does anybody have any negative expieriences with either brand? and i'll be looking for SFC's, lower control arms, and a panhard rod. thanks.

Ericbigmac83

iTrader: (19)

if its just for an average street car then no its not really worth it. but if youre making a track car and trying to save every ounce then yes it is. its not any stronger really, its just lighter

smoknta

To the average joe, no chromemoly is not worth the extra money. But I build all my own suspension, and it is all chromemoly, you get a slight weight savings. And yes it is stronger, that is why you can use a thinner wall tubing. Mild steel and chromemoly have no difference in weight per foot. But you can use say 0.095 wall on a control arm instead of 0.120 with mild steel.

Dex

iTrader: (5)

I think i might be a little stronger but i'm not sure off hand.

smoknta

The tensile strength and yield strength are both higher for 4130 chromemoly versus 1020 DOM mild steel.

dutinsss

iTrader: (2)

in that case i woudn't be able to justify chromoly since its a bolt-on street car that i'd be lucky to get into the 11's. so with that said, is spohn any better than UMI?

UMI Performance

iTrader: (77)

Hello,

If I can help with any of our products please let me know and I am glad too.

Thank you!
Ryan

dutinsss

iTrader: (2)

how much ground clearance will i loose with your boxed sfc's as opposed to the tube sfc's? i plan on running the TSP true dual system so i doubt they would hang any lower than my pipes anyway. and will one of your torque arms fit with the TSP true dual system? thanks a lot.

UMI Performance

iTrader: (77)

Neither the boxed or tubular style SFC will reduce ground clearance. The boxed do hang lower then the tubular design but are not the lowest part of the car. I always say if you want someone to see your SFC's from the side at a distance go with the boxed style. If you want them hidden and want them to tuck up tight go with the tubular design. All the SFC's we offer will clear with all exhaust systems, including the TSP true duals.

For a torque arm, we do offer a torque arm designed to clear with the TSP system and it actually allows the exhaust to tuck up tighter into the car compared to the stock torque arm. Below is a picture of this arm installed with a TSP system, also if you click on the link there is addtional installation pictures.

If you have any questions feel free to ask and I am glad to help. Thank you!



www.umiperformance.com/2205

Mike454SS

iTrader: (4)

nope you're wrong

BlackScreaminMachine

iTrader: (17)

In essence it is, but depends on what you do. If you at all race, having the most power and lightest weight is very important, now this is much more costly. Most drivers try to take out weight 1st and when upgrading, go from Mild steel to chromoly.

I am currently helping with a race car running mid 10's @ 127 on motor, with a 34XX race weight, the car is at the point it needs to start adding lightend components such as k member and removing the rest of the power equipment. These changes effect the 60' and how the car xfer's weight to the tire. This car responds to small changes since its really dialed in. In a ave street car this isnt "AS" important but still important none the less.

The big question is, how deep is your pockets?

dutinsss

iTrader: (2)

i'm going to go with the mild steel and put the extra money toward other parts. and thanks for the pics of the TSP system with your parts installed, it was exactly what i was looking for

UMI Performance

iTrader: (77)

Glad to help

You can find more pictures and information on our site as well at www.umiperformance.com or feel free to call or PM.

Ryan

dailydriver

Given. But is there ANY chance that the chromoly is more "brittle" than the mild steel??
I'm just trying to figure out WHY the SCCA forbids the use of chromoly in roll cages (and requires DOM mild steel). Whereas, we all know that the NHRA feels that chromoly is perfectly fine/safe, even in 340mph funny car cages.

BlackScreaminMachine

iTrader: (17)

Its probably a difference of repeated twisting, turning, and possibly multiple collisions will eventually degrade and weaken the metal to near uselessness where as when a funny car hits the wall, its a one time thing and they dont turn.

Ericbigmac83

iTrader: (19)

no colonel sanders, you're wrong, i'm right

the chromoly is stronger if the weights are the same, so they can take weight out of the chromoly and still have it be the same relative strength. if a chromoly lca had the same wall thickness of the steel counterpart then yes it would be stronger, but they thin the walls to save weight, therefore the strengths come out to be about the same

chrismorales75

C-moly is stronger than mild steel, c-moly because it is made out of thinner material is lighter.

The only place in my opinion pays to buy c-moly is with a roll cage because there is SO much tubing.

Going from a c-moly lower control arm to a mild steel control arm is like 1 or 2 pounds, personally I wouldn't pay 1.00 to save 1 or two pounds.

C-moly will have a higher resale value.

Both work fine in any street car. Talk to chassis people like the guy from UMI he can tell you how much weight you save c-moly vs mild steel.

Remember 100 pounds in theory is worth 0.10 in the 1/4 mile.

So the question is will you pay hundreds of dollars more to run a 12.50 vs a 12.54?

Personally I wouldn't but then again, I'm not rich, if I was sure why not buy c-moly everything =)