is there a better substitute for this besides the mazdaspeed?

 

not that I know of

 

i'm thinking about making a tubular PPF. this just sucks to have to keep pulling down and welding it up. at least it doesnt break at the welds

 

I remember reading a forum member on here that had their PPF cryo dipped or something of the sort. The cold temps organizes the molecules and strengthens the PPF. Not sure on the price though.

 

Good idea! Sounds expensive

 

Is it the mazdaspeed unit that is cracking, or stock ppf. thanks.

 

where's it cracking and under what conditions are you putting it under to make it crack? Hard launches, etc?

Tim

 

a tranny and diff brace would keep you from breaking your ppf

 

mazdaspeed ppf are discontinued. there are a couple of companies in japan (like Makers-7) that make stronger aftermarket ones...but as far as i know, they dont deal with US orders.

 

yea what conditions, is the drivetrain aligned correctly?

 

I believe your referring to Rich (goodfellasfd3s). I actually bought a cryoed PPF from him since I cracked mine last year, I've been pleased with it thus far.

 

Just take it to a machine shop and have them reinforce the area where it is breaking.

 

Do you have pictures of the PPF and where it has cracked
I have yet to see one myself

 

It's a lot cheaper than you think it is.
http://www.cryoscience.com/

 

well i dont do any launches out of first really, i do mostly higway pulls, i do occasionally drift a little in parking lots in 1st and 2nd gear. The first time it cracked it was about halfway between th etranny and the diff in 2 different spots, almost all the way from top to bottom, and the top bracket that attaches to the top of the tranny completely broke off, so i welded those up. Now the piece that attaches to the diff broke off and it's starting to crack on the bottom support that goes to the tranny and also halfway between the two in a different spot

 

these ppl do rotary parts and have a list for them. http://www.nwcryo.com/motorsports_price.html

 

The PPF is designed keep the nose of the diff from moving up and down during acceleration. Some possible causes for cracks:

1) diff and/or motor mounts are shot. This puts excessive twist to the PPF
2) hard mounts, but misaligned. This would prestress the PPF, and encourage cracking

cryo is done to reduce wear, not increase strength. this is not a wear problem.

 

cryo is similar to heat treament, realign molecules; wear is reduced by hardening steel, strength (and brittleness) is increased by lo and behold: hardening steel

 

Cryo treatment primarally increases the wear resistance of a metal, but it also improves the fatigue resistance and bulk strength and hardness properties.

 

Have to agree with kevin here. I cracked my PPF 2 times. I then put in a new one, and Jackson racing solid aluminum motor mounts, and it hasnt had a problem since. The Diff mounts are next on my list to be replaced, and if your diff and motor mounts are still stock units, this is probably the problem....

 

I have seen no test data to support fatigue and bulk strength inprovements. Please provide links with test results ...

 

I was just reading an article on cryo treatment recently, let me see if I can find it...

 

yeah i would like to know about all this before i go and spend some money on something that may not work, but i would still like to thank you for the info.

 

Well, I can't find the article I was talking about, but I still think that cryo treatment of a steel will increase the tensile strength. Cryo treatment definitely does increase hardness (especially in higher alloy steels) and you can generally translate increased hardness into increased tensile strength. In most steels there is a linear relationship between brinell hardness and tensile strength.

 

so what do you think abou tdoing this to apex seals