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  #21 (permalink)  
Old 11-21-2020, 04:20 PM
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Leave the roll bars..Make sure there is not too much toe in the front. If the rears are toeing too much they will also cause understeer. Make sure the rears are straight, or if it's really bad and the front doesn't fix it , you can put a little toe out on the rear .
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  #22 (permalink)  
Old 11-21-2020, 05:25 PM
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Originally Posted by CHANMADD View Post
Leave the roll bars..Make sure there is not too much toe in the front. If the rears are toeing too much they will also cause understeer. Make sure the rears are straight, or if it's really bad and the front doesn't fix it , you can put a little toe out on the rear .
I was told to set up the rear tires a little toe in because under acceleration the rear will want to toe out... is this true?
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  #23 (permalink)  
Old 11-21-2020, 06:18 PM
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I was told to set up the rear tires a little toe in because under acceleration the rear will want to toe out... is this true?
Both the standard and outboard braked rears on ERA cars like 1/16" of toe-in per side. The standard rear is not adjustable for toe, so you have to just cross your fingers that the LCAs give you zero or a hair of toe. The outboard braked rears are adjustable for toe. I never heard the "wanting to toe-out" on acceleration thing. Remember though that the outboard braked rear has an angled-in trailing arm up at the top of the upright as well.
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  #24 (permalink)  
Old 11-21-2020, 10:32 PM
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I think he said he has a Backdraft....that's BMW, The BMW suspension should go up and down without altering the toe, an alignment machine should fix it
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Old 11-21-2020, 10:36 PM
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Both the standard and outboard braked rears on ERA cars like 1/16" of toe-in per side. The standard rear is not adjustable for toe, so you have to just cross your fingers that the LCAs give you zero or a hair of toe. The outboard braked rears are adjustable for toe. I never heard the "wanting to toe-out" on acceleration thing. Remember though that the outboard braked rear has an angled-in trailing arm up at the top of the upright as well.
The jaguar rear tow is adjustable at the shims behind the control arm pivot rod mounts at the bottom of the diff. You gotta set it up...it takes a little time.
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  #26 (permalink)  
Old 11-22-2020, 03:30 AM
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Originally Posted by CHANMADD View Post
Leave the roll bars..Make sure there is not too much toe in the front. If the rears are toeing too much they will also cause understeer. Make sure the rears are straight, or if it's really bad and the front doesn't fix it , you can put a little toe out on the rear .
I run a very tiny amount of toe out on the rear of my Formula Ford. I would not recommend it on a street driven car.
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Old 11-22-2020, 05:03 AM
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I honestly do not understand why people that do NOT have a Backdraft and know nothing about a Backdraft post in a Backdraft thread.

It is no different than if I had a Mustang and went on a Corvette forum and started giving advice on the best suspension setup. Or a guy in a SBF engine thread asks for a good starting point to set his timing and a guy with a Porsche Boxster engine says my timing is set to this. How does that help? .

Because your Factory 5, ERA, SPF, CSX..etc..etc. looks like a Backdraft doesn't mean a thing.

If you have a BMW E36 you know more about how to setup a Backdraft than any other Cobra owner than a Backdraft Cobra owner.. And even then the weight dist in a BMW E36 is fwd bias and not rear bias.

New Backdraft owners read a post from some guy posting in a Backdraft thread that has 2 billion posts and think that that person knows their stuff. Well that person has a solid axle FF5 and he is giving advice on a car he knows absolutely NOTHING about.
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  #28 (permalink)  
Old 11-22-2020, 08:29 AM
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It is the internet. Posters should be careful about offering specific advice. Readers also should be careful about following such advice.

...but you never know someone with a different car and different experiences might give you something to think about and solve your problem.
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Old 11-22-2020, 08:38 AM
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Now, I do remember some of the elves at ERA telling me that rear toe-in is dialed in to help braking, or rather control of the car while braking, but I have never heard of one of our cars accelerating and creating toe-out, whether it's Jag based, BMW based, or Fred Flintstone's feet-driven car. Now, I suppose it could happen, I've just not heard of it, especially if you have squishy suspension components.
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Old 11-22-2020, 11:05 AM
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There are many things that affect balance, understeer and oversteer regardless of chassis.
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Old 11-22-2020, 11:06 AM
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Quote:
Originally Posted by patrickt View Post
Both the standard and outboard braked rears on ERA cars like 1/16" of toe-in per side. The standard rear is not adjustable for toe, so you have to just cross your fingers that the LCAs give you zero or a hair of toe. The outboard braked rears are adjustable for toe. I never heard the "wanting to toe-out" on acceleration thing. Remember though that the outboard braked rear has an angled-in trailing arm up at the top of the upright as well.
I have a CSX car
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  #32 (permalink)  
Old 11-22-2020, 11:12 AM
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Originally Posted by ERA 626 View Post
I have a CSX car
I know, but I spent a good ten minutes looking and I can't find any posts anywhere on the 'net that say acceleration can cause toe out. I think what the elves told me is more in line with the physics of these cars, be they Backdrafts, ERAs, or CSX cars.
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  #33 (permalink)  
Old 11-22-2020, 11:48 AM
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I know, but I spent a good ten minutes looking ...
Another five minutes turned up this seemingly definitive youtube vid. And you know what they say, if it's on youtube, then it has to be right.

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  #34 (permalink)  
Old 11-22-2020, 02:51 PM
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Originally Posted by Grey 65 View Post
I honestly do not understand why people that do NOT have a Backdraft and know nothing about a Backdraft post in a Backdraft thread.

It is no different than if I had a Mustang and went on a Corvette forum and started giving advice on the best suspension setup. Or a guy in a SBF engine thread asks for a good starting point to set his timing and a guy with a Porsche Boxster engine says my timing is set to this. How does that help? .

Because your Factory 5, ERA, SPF, CSX..etc..etc. looks like a Backdraft doesn't mean a thing.

If you have a BMW E36 you know more about how to setup a Backdraft than any other Cobra owner than a Backdraft Cobra owner.. And even then the weight dist in a BMW E36 is fwd bias and not rear bias.

New Backdraft owners read a post from some guy posting in a Backdraft thread that has 2 billion posts and think that that person knows their stuff. Well that person has a solid axle FF5 and he is giving advice on a car he knows absolutely NOTHING about.
There are no doubt elements unique to setting up suspension on a Backdraft or E36 that don't apply to other Cobra replicas. Fair point.

Regardless, there are also many variables involved in setting up a car that are independent of the specific suspension - and which are common regardless of make, model or serial number. It is in this arena where I believe most comments have been directed.

CC is no different than any other forum or social media site - you need to 'sort the wheat from the chaff' when choosing to accept or use any advice given. Stated another way: You usually get what you pay for.
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