bluehawk2

iTrader: (74)

I have a 2002 Firehawk with a 404" LS2 and Twin billet wheel ball bearing gt35 turbos. I never made a Dyno pull at full power but it made 580hp @ 4psi on a mustang Dyno. It should be capable of making it to the 1000hp mark

I built the car with the idea of having a really good working street strip car
It has a th400 and a Moser 9" rear
I have BS3 fuel injection with a Leash Boost/Bump box
I wanted it to be capable of some really good 60' times


I am currently planning on narrowing my 9" so I can run a different backspacing 15" drag wheel. I will need to get a shorter axle.

I am wondering if my 35 spline axles are strong enough for my car or should I consider stepping up to 40 spline axles. I only drive the car 1-2k miles a year, but I would like to avoid changing the spool(If I swap to 40 spline axles)
I want to do what is best but if 35 spline axles will work then it will save time and money.

Thanks

JL ws-6

iTrader: (50)

35 will work, I wouldn't gun drill a 35 spline axle fwiw. Lighten flanges sure that will be fine, just don't gun drill them and you will be fine.

I would buy a quality 35 spline axle from someone reputable, if you want to go the best possible 35 spline option mark Williams would be my recommendation.

Fwiw, I'm putting 35 spline mark Williams axles in my 12 bolt that's 13 inches narrower than a stock width 12 bolt, along with their 35 spline spool, and a 4.10 pro gear set. Car is about 3050 lbs and will see 850 n/a hp and about that much nitrous on top of that.

I have no real concerns about the axles or rear end being a problem at this level.

bluehawk2

iTrader: (74)

I'm deff not thinking about going gun drilled. I called strange about their pro race Hy-Tuf axles, but the guy acted like they would be too brittle to run on the street any. I'm going to call Mark Williams tomorrow. Only thing about MW is I wonder if I have to change over to a MW spool?

Carl at CRP

iTrader: (9)

35-spline should be fine but Mark Williams uses a different pressure angle on their splines than does Strange or Moser.

Carl

Blown06

iTrader: (32)

You didn't mention the weight of the car or what kind of 60's you're at least anticipating. You mentioned 1000 horsepower and if we assume it'll be 3300 lbs or less being a street car and maybe yanking some 1.3 or slower 60's..........I'd probably feel comfortable with the 35's.

I run 40 spline **** in the truck, but the lightest it has ever been is 4110lbs with a 60' goal in the 1.20's. It has been a best of 1.34. I use all Strange rear components except the housing which is a Racecraft.

bluehawk2

iTrader: (74)

I'm really not sure on weight. It's not a lite weight by any means but I have pulled AC and a lot of the normal weight reduction things out. It has non padded carpet. I'm wanting to say its 3350 without me in it.
I add a good bit to the car lol

ssvert99

iTrader: (26)

35 spline Strange Pro Race axles will be fine for your needs. Don't bother with any light weight options as you will never see any gains from it on a axle in your application, and I NEVER suggest any sort of flange mods to an axle if the car will see street use.

bluehawk2

iTrader: (74)

So the pro race Hy-Tuf axles would be ok for some street use? I'm always careful driving around. I put 1-2k miles a year on it.. At most

transam69230

iTrader: (49)

3850lbs raceweight, 1300rwhp with 35 spline axles with no issues. The car has been low 1.3 60fts.

I did break a 28 spline pinion though, HAHA.

Firehawk441

iTrader: (41)

They can make them for a strange or Moser spline.

Firehawk441

iTrader: (41)

I've run gun drilled 35 spline axles for the past 11 years.

Doug G

I've broke enough rears to feel the need to bullet proof it as best I could....so I went all Moser stuff and 35 spline. Street/Strip and maybe 1000miles a year if lucky. Working great so far.(but not even close to 1000hp mark)

bluehawk2

iTrader: (74)

If MW will sell 35 spline axles that will work with my Moser spool then that will be the way for me to do this

I can send my moser axles back and have them shortened and drilled for 5/8" studs for $185 plus shipping but how good will the Moser axles actually be? I've heard Moser 35 spline axles don't normally break....they bend the splines

JL ws-6

iTrader: (50)

I wouldn't on a street car, that was my main thought.

I don't know if I want to do the gun drilling or not with my sled at this point. Cost isn't the concern... more am I asking for trouble now doing that on something smaller than a 40 spline. Especially if it ever shakes the tire.

StangEaterSS

iTrader: (41)

I have moser 35 splines in a 12 bolt. Ive been 1.27 60fts numerous times on a 3,350lb race weight car. No issues yet.

ssvert99

iTrader: (26)

Proven point in a lot of cases.

You will be fine with a set of the Strange 35 spline Hy-Tuff axles on limited street use. Cost of the axles, bearings, and 1/2" stud kit will be about 470.00. The same thing from MW will run well over 700.00

Give us a call, we will be happy to help you get the right parts for your needs at a great price.

Firebirdmuscle

iTrader: (16)

What's the reasoning for staying away from gun drilled axles in a street/strip application?

JL ws-6

iTrader: (50)

I'd worry about the gun drilling weakening the end of the axle from bearing to flange..... potholes, etc

ssvert99

iTrader: (26)

For the little of no gains you will see from the little reduced weight on a lightened axle the risks of failure and cost of the damage that could happen are never even close to the gains you will see on the track(virtually none).

Kinda like the difference between a mild steel and chromoly k-member in street use. The risks of a failure from the 5 pounds or less difference between the two materials(due to material thickness only) is just not worth it.

I would recommend running a lighter wheel/tire combo and lighter brakes well before a lightened axle. The further away from center you get the greater the benefit of reduced rotating mass.

axe murderer

iTrader: (3)

You might want to consider selling what you have now & getting a complete new rear end with Strange or Williams stuff.