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Fun at the drag strip sunday!

2K views 19 replies 8 participants last post by  Tedfirediver1 
#1 · (Edited)
https://youtu.be/8SCncpnLRQQ
Made 5 passes on a 70 degree beautiful North Florida day at Emerald Coast Drag strip , lots of people out , great time!
 
#8 · (Edited)
1/8 mile is all there is in San Diego and with the Chargers leaving that bit of track will be gone soon. May look like someone's back yard but it's got lights and a clock. I run in the mid 9's and yes great fun. Going all out and no looking in the mirror. So you guys with real 1/4 mile tracks are a fortunate bunch. Brian
 

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#12 ·
Currie 9+-98828 9+ Cut To Fit 28 Spline Axles, 28 Inches Long

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Currie 9+ Cut-To-Fit Axle Shafts

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Specs
Material Type:
Steel

Sold in Quantity:
Each

Bolt Pattern:
5 on 4.5"

Finish:
Natural

Spline Count:
28

MFG. Part #:
9+-98828

Overall Length:
28.00

Overall Diameter:
6.16

Spline Length:
4.00

Offset:
2.50




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Info

This Currie 9+ CTF (Cut To Fit) 9" Ford axle provides you with a 28" long, 28 spline axle shaft with 4" of spline length. Up to 3" of this spline length may be cut off so that you may attain an axle length anywhere between 25" and 28" and still have adequate spline engagement into your 3rd. member. All CTF axles feature high performance induction heat treated forged alloy steel construction, and feature a 2.525" brake space dimension which is stock for 64-72 Mustang, Falcons, Fairlanes, and Maverick rearends. Wheel bolt pattern is drilled the stock 5 on 4 1/2" pattern, and an access hole is drilled.
All CTF axles come with a full installation package which includes a set of five 1/2"-20 Ford style wheel studs, one heavy duty small bearing style retainer plate, one high quality small axle bearing with retaining collar, and one axle seal. Sold as a kit.
Currie Rear Axle Installation Instructions
How to Measure Your Housing Tech Tip (Link)
Need a certain length not found on our site? Check out Currie's 9+ Rearend Calculator to have specially sized axles or rearend housings made for your specific application. Custom orders will be built and processed directly through Currie Enterprizes and shipped to your door. For ease of ordering, please refer to Currie's Dimension Diagram.
 
#14 ·
Interesting discovery about exhaust backpressure and all , im running 2.5 full exhaust through Borla 3 inch XR-1 race mufflers , I recently welded in exhaust cutouts directly behind h-pipe , I removed the cutouts for 1 pass , lost .7 et and 5 mph on that run , next pass put them back on ran 7.6 at 93 , so lesson learned , my engine needs a lil back pressure
 
#15 · (Edited)
I try to not be a tech head so much as I used to be when I worked in the computer and networking industry but sometimes it follows me over to working on these old cars.

I think what you may have done by opening up the cut outs is killed your exhaust velocity. Its not really back pressure but the exhaust needs an adequate velocity to exit from whatever is bolted to the heads(manifolds or headers). Velocity of exhaust makes the scavenging more efficient and helps improve volumetric efficiency.

I have had just the opposite experience to what you saw. On one of my previous builds the exhaust system was not all that great and probably a bit undersized. I had dumps so it was easy enough to unbolt the collectors and just run straight headers. On the next few test runs the car picked up .7 sec and a mile per hour. Its a fine point but important I think. Maybe, if you re-sized your cut outs and put just a short pipe extension on them, it might run better but if the exhaust system you have is already optimum, its kind of hard to improve on the optimum.

I wish I was at the point where I could take my 331 out and see what it is going to do. Unfortunately, I am quite a ways from being ablt to do that. It is really exasperating too. I did an extensive upgrade to my 8 inch third member but still running the stock axles. I'm thinking maybe I need to address that. Sooner or later at some point, I'm going to drop the hammer with this thing and I would feel a bit better if I had a chance with the rear end.
 
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#16 ·
I soooo feel your pain , mine is far from finished , but I feel good about my 331 build , haven't dyno it yet but feel those are some decent 1/8 times for a homebuilt daily driver built with about 60 percent used parts in my driveway.Running throught a stock T5 and slightly beefed up 8 inch ,.
On a side note on exhaust , even though uncapping headers hurt my et , that solid cam sounded mighty beastly through that open exhaust!
 
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