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tire pressures
I know this has been covered before, but I really would like some input from Backdraft owners ONLY on what the optimum tire pressures (F&R) are for the 15" wheel set up with BFG Radial TAs. Because we have a BMW based suspension, input about other car brands is not so useful.
I am looking for the best all around set up for the street. I don't do any competitive events, especially with these tires! I just want great handling, limiited vibration, and the best ride. Not much to ask! SkipB |
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http://www.backdraftboys.com/forum/ |
Guys,
I can't seem to get on the Backdraft Boys site and I am dissapointed that the only reply is from a Unique owner. So, I still need some help on the original question. SkipB |
Skip,
I run 24psi rear and 26psi front in 295/50 15 and 235/60 15 I copied this from a thread on the Backdraft site. Quote:
See if this link will take you to there site.I am surprised Jay or Reg haven't responded to this thread. They are usually good about that. http://www.backdraftboys.com/forum/t...sp?TOPIC_ID=20 |
It's been posted on this site before, I believe the consensus from several owners with the 15" tires was that 28psi all around is nice. Our experience is primarily with the 17" wheels, in fact the 15" wheels only account for 15% of our sales.
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Thanks guys for the responses.
I'll try a couple of the settings mentioned. The reason I asked is a couple of guys around here are running really low (20-22psi) in the rears and say this works well. It sounds too low to me! 28 or so sounds better, and safer. SkipB Ps. I finally was able to get on the Backdraft Boys site. Not too much on tires there except for 17" info. |
For what you are asking, the BMW based suspension really doesn't mean any thing. Unless BDR has tested your setup on your tires and come up with a recomendation (did you ask them) then you are asking for some one else's personal preference. BFG has this formula:
(Vehicle Weight in lb/100) + 2 psi at heavier end + 2 psi all around if suspension and alignment are stock. Example: 2800 pound car (3000/100) = 28 psi Add 2 psi all around = 30 psi Add 2 psi to heavy end = 32 psi at rear Many find that high, put plug in yours numbers and see what you think. Play with them up and down a few pounds and try again. Have fun!:) |
Rick,
That is awlful complicated. :) |
Ok, lets do the math here.
3000 divided by 100 = 28? Not in my fire torn San Diego county. Tell me by that formula what a Backdraft weighing 2400lbs would run at both ends. SkipB |
Had my car weighted by a Winston cup team member (a scale on each corner) - set-up with 26lbs fr & rear.
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man... y'all got some heavy cars... mine weighs in at 2240 lbs. I've got the Radial TA's, & run 26 all around. So far, I'm happy with it.
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guys....26-28-30????
are you splitting hairs here? maybe? these a lightweight cars with street tires...anyone of those previously discussed numbers will work....personal perference and tire wears trends should dictate which you prefer....just don't exceed the max imprinted on the tire. |
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if one can truly and honestly "feel" the difference in 2 lbs of air (even 4 lbs) driving around on the streets, you must be a real sensitive guy!
Good luck to all in beating this dead horse! |
No you cant feel it when driving around on the street but you can notice it when you turn. And yes sitting on my but for a job for the last ten years tends to make ones gludious a bit more sensitive not to mention bigger :LOL:
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I am so sensitive I missed 2 days of work due to a paper cut to my finger....
but in all seriousness... it seems to me that 26 PSI air pressure is at the very low end of the spectrum for our cars. I have heard the theory of 1 PSI per100 lbs. of car weight but does that hold true just for Cobras? If so, why? I have 28 PSI front 245/60/15 and 30 PSI rear in YOKO's S/T 295/50/15. I would like to hear a solid reason why lower air pressure is better. |
I've got the 15" BFG radials on my BDR. Geez, hate 'em being so Squisshy....I run all 4 of mine at 33 psi. Love the firm ride, no wallowing feel from the tall sidewalls.
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Well, I guess I am a sensitive guy. I can feel the difference in just a few pounds of air, especially on the low end. I see we have thoughts all over the place, but it seems like mid to high 20s wins out.
I would really like to replace my BFG TAs with something a little more round, and sticky. I know the selection is limited. Next time I am going to try the YOKOs. That seems to be the way to go. So no more beating a dead horse, even if there are many different set ups. I was just assuming that the Backdraft guys would have an optimum set up from experience and multiple attempts to get it just right. Guess I was wrong! SkipB SkipB |
This is not beating a dead horse. It can give someone a place to start.
If the Club Cobra forum isn't here to help other Cobra enthusiast then what is it for? I did a search on tire pressures and it took a few tries to get to something close to what would help. The search feature ain't the greatest and if all these repeat questions bore you get another hobby. Any teachers hear? I guess this attitude would be great for the people teaching are children. I can see it now. Sit down kid and shut your mouth. You are beating a dead horse. Do you know how many times I have been asked that question?:) |
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