This is topic 4 cyl. springs for the rear 4 drag racing?? in forum Tech Talk at Northern California Ford Owners  .


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Posted by vpr_klr (Member # 3353) on :
 
Which ones should i use?? It's for my 3200lb. PSCA Limited street car. Regular or variable?? From a coupe or hatch or vert?? Any help would be greatly appreciated as I can't run my coil overs in the rear. Moroso told me their trick rear springs raise the ride height 4" above stock and I need special control arms!!!!!!!!!!!!
 

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Posted by Black94 5.0 (Member # 655) on :
 
As far as I know all 4cyl springs are the same...The verts might be a little stiffer if anything...

I'm also pretty sure that all the factory 4 cyl springs are linear rate and not progressive...

Do you have drag racing air bag in one side?....Do you have an aftermarket rear sway bar?....What tires are you gonna run and what is the rest of your combo (control arms, shocks, etc)
 

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Posted by Jeff S (Member # 371) on :
 
DO NOT run a 4cyl spring in the rear...they are too soft. The softer the spring the more the car will squat and the more the car squats the less force will be applied to the tires.

You should either run a stock spring and cut it to the appropriate hieght if needed or run a pair of lowering springs. Also make sure to run springs that are of an equal rate in the rear(not morosso or Eibach) since they will not let the anti roll-bar work correctly and you'll definitely want to run the bar.
 

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Posted by Black94 5.0 (Member # 655) on :
 

quote:

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Originally posted by Jeff S:
DO NOT run a 4cyl spring in the rear...they are too soft. The softer the spring the more the car will squat and the more the car squats the less force will be applied to the tires.

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That's exactly what I was thinking....All the hp will get absorbed by his soft springs...

4Cyl spings might work well with some 225 Kuhmo's and 500rwhp(exageration)..LOL
 

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Posted by shade- (Member # 298) on :
 
I've had some luck with sagging stock V8 rear springs. Going to swap to somewhat newer (hopefully non-sagging) to see if there's any difference.

4-banger springs are probably beneficial up front, especially if you get 90/10 struts.
 

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Posted by vpr_klr (Member # 3353) on :
 
28x11.5 et streets, steeda anti roll bar, steeda double adjustable uppers, southside lowers with a projected 570 plus to the wheels. I had coil overs in the rear before and the car launched great but the rules in limited street don't allow rear coil overs and I don't want to spend $350 for springs(drag) and spring perches for the front(as they are coil over too). Moroso did not tell me the trick springs wouldn't work with the anti roll bar as the tech guy even asked me if I was running one. I have a choice of stock springs, but the choices are endless>>>lx coupe 4 cyl; lx hatch 4 cyl; lx vert 4 cyl; and the gt and 5.0 varients, regular duty or variable rate. I'm stumped
 

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Posted by mustanggt5091 (Member # 444) on :
 

quote:

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Originally posted by vpr_klr:
Moroso did not tell me the trick springs wouldn't work with the anti roll bar as the tech guy even asked me if I was running one.

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me neither from Eibach. I even asked a couple of times if the drag launch rear springs would work with a sway bar such as HPM's since I have HPM everything else.

P.S. Dont meen to hijack a thread but where do you get the PSCA rule book???
 

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Posted by vpr_klr (Member # 3353) on :
 
pscaracing.com in their store
 

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Posted by yellow67stang (Member # 903) on :
 
your going to need a lot more than 570 to the wheels to compete with those dudes! Good luck though!

[ April 08, 2004, 10:09 PM: Message edited by: yellow67stang ]
 

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Posted by white1990stang (Member # 2307) on :
 
would lakewood 70/30's in the front with moroso trick springs and 50/50's in the rear with rear trick springs be a good setup?
 

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Posted by 98slowhoe 'FIFTYLX' (Member # 895) on :
 

quote:

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Originally posted by yellow67stang:
your going to need a lot more than 570 to the wheels to compete with those dudes! Good luck though!

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quote:

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yellow67stang
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Member # 903

posted April 08, 2004 10:07 PM
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your going to need a lot more than 570 to the wheels to compete with those dudes! Good luck though!

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Yeah I know, but I just want to get out there and show my face. My buddy has 530 to the wheels and runs 10.40's in a similarly prepared car(3250 lbs.!) I know this motor might even grenade the first time in comp. or it might last the season, anyway, a 408 with a ys trim is being built for next season, but I just want to show those guys I'm down to race and I will be at every race with my slow car. You never know, people break stuff and redlight and so forth. Oh yeah, the record runs 9.30's with a small block and a auto! I'm going to be the only guy running a stick which will make it very interesting
 

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Posted by vpr_klr (Member # 3353) on :
 

quote:

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white1990stang
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Member # 2307

posted April 08, 2004 10:15 PM
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would lakewood 70/30's in the front with moroso trick springs and 50/50's in the rear with rear trick springs be a good setup?

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run adjustable shocks and struts, for changing track conditions, the lakewoods are good if you drive the car on the street. The trick springs are good but listen to what Jeff S had to say on this post, because if you serious, you need to run a anti roll bar
 

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