Ride Height and Alignment Specs - New SPF

[Voyager]

I’m taking possession of my new SPF next week after the dealer finishes his pre-delivery prep. I’ve already asked the dealer to swap out the current tires (BFG 255/60-15 front & 275/60-15 rear) for BFG 235/60-15 front & 295/50-15 rear.

Should I ask for any particular ride height and alignment specs (street driving - no track)?

Bob

[Bob In Ct]

I would opt for something other than BFGs. They are neither grippy nor round.

Bob

[Zoom This]

Bob's right. Ditch the BFG's for something like the Mickey Thompson tires or if you have the budget, Billboards, Avons etc. I currently have Mickey Thompson Sportsman S/T's. 245 on front, 275 on back. Just got back from a 3000 mile road trip on some very generous speed limit roads thru Montana. Great tire. Feels stable at 120 mph cruise.

SPF specs for alignmernt are front Toe in – 1/8” total. Camber ¼ degree negative. Caster 4-6 degrees positive.

Rear Toe in – 1/8” total. Camber – ¼ degree negative. For competition, camber front and rear by ½-3/4 degrees

[gsharapa]

Go with the Goodyear Billboards as they look very nice on a SPF and grab pretty well when heated up. I agree on the negative camber in the front. I've had 4 SPFs in the past and set all of them up that way........have fun and enjoy!!

[Mark IV]

Do keep in mind that the billboards are NOT DOT legal where the Avons are. The Avons are moe expensive, but do some searching here on them and you will see very good reviews.

The Goodyear GTIIs and the Goodrich T/As are cruising tires, not well suited for hard driving.

[Voyager]

Here are my thoughts on the BFGs, as backwards as it sounds.

It is safer for me to learn/experiment with the Cobra’s characteristics by playing with slipperier tires than gripper tires.

This is my first cobra/high horsepower car. I expect a lot of wheel spin. I want it early, audible, predictable, and often. Once I experience the “wheel spin on demand” phenomenon, I’ll get over it and w/in a year or so, replace them with better tires (MT street radials). By then, I’ll have a basic understanding of the car and can adjust to things happening at higher speeds/grip levels.

Crazy?

Bob

[smallblockhead]

Yes, that's crazy, unless you do it in a large parking lot at 2 AM with no lightpoles.

Gary

[Voyager]

Crazy?

Maybe… During my early years of owning a Miata, I found great satisfaction in delicately balancing the over steer/under steer as I pitched the car, in a 4-wheel drift, through the canyons on my way to work. As the years went by, and the modifications to the car grew expediently, the joy of “being one with the road“ got harder and harder. Now, the ridiculously modified Miata is so glued to the road, that I feel I’ve lost something.

I have several sets of tires on rims. A lot of times, I have more fun on the less grippy ones.

However, having never experienced 515 hp in a Cobra, I may be setting myself up.

[patrickt]

Originally Posted by Voyager

It is safer for me to learn/experiment with the Cobra’s characteristics by playing with slipperier tires than gripper tires.

Crazy?

No, Bob, that's not so crazy. Of course, professional instruction is best, but in the meantime you should take your car out to a stadium parking lot, or similar place where there is nothing to hit, drive around in a circle until about as fast as you can, then lift off the gas and touch the brake and learn what happens. Then try coming out of imaginary turns and get on the gas a little too hard. Finally, practice "stop light" burn outs, but have your wheels accidentally turned a little bit and see how tricky it can be to keep the car straight. Of course, if the pavement is wet it makes it even more fun. 90" wheelbase cars, even when set up just right, are still very twitchy.

[Silverback51]

Originally Posted by Voyager

Here are my thoughts on the BFGs, as backwards as it sounds.

It is safer for me to learn/experiment with the Cobra’s characteristics by playing with slipperier tires than gripper tires.

This is my first cobra/high horsepower car. I expect a lot of wheel spin. I want it early, audible, predictable, and often. Once I experience the “wheel spin on demand” phenomenon, I’ll get over it and w/in a year or so, replace them with better tires (MT street radials). By then, I’ll have a basic understanding of the car and can adjust to things happening at higher speeds/grip levels.

Crazy?

Bob

I cannot comment from first hand experience about the BFG's, but the Goodyear GTII's that I had, are in my opinion dangerous. They did not give any warning as you approached the limit. So you could be fine on minute, and gone the next.

The Goodyear BB's are great in that respect. Yes, the limits are higher, but they also give considerable warning that you are approaching the limits, and when exceeded, the slip, not break away. The Avons are much the same as the BB's, but they do not give as much warning.

Maybe someone can comment on the BFG's.

[Voyager]

Appreciate the feedback. All sounds like valid counsel.

John – you wore the back Avons to 40% in 2500 street miles? Wow.

What about Cooper Cobra tires? Significantly better than BFGs? If not, I’m just going to take the car with the tires that are currently on it (BFGs). I assume I’ll burn them off within the first year. Then go with a top notch tire.

Bob
(anxiously awaiting delivery!)

[m5extc]

Bob,

I have to agree with Flyin Freddie. Get some 17s (which is what I ended up doing) as you have multiple choices on tires that are readily available. If you must have the old school look, eventially pick up a set of take of 15s (or keep yours) and put on some Avons or Billboards. BTW, between the two, I feel the Avons are a much better street tire that the BBs.

Andrei