OK what is a pig mat ??????

Jamie, I think the pig mat you can get from paint supply store, I use an oil absorbant mat even in diaper,to keep it cleaner, got mine from local fire dept. they use to clean oil spills at accident scene

well we here in farmville have lot of farm stores and farmer hardware stores. I will have to check them out

rules

1:8 LOWER ENGINE CONTAINMENT DEVICE
In classes where specified, must utilize an NHRA-accepted lower
engine oil-retention device. SFI Spec 7.1 or 7.2 Lower Engine
Containment Device permitted. A properly fitting lower engine
ballistic/restraint device mandatory. The NHRA Technical staff can
accept or reject any device. Any device that fails to perform as
required must be replaced or repaired to the satisfaction of the
Technical staff prior to any furthur runs. When used, an SFI Spec
7.1 or 7.2 Lower Engine Containment Device must cover the sides
of the block and pan up to within one inch of the head mating
surface and extend to within 1 1/2 inches of the front and rear of the
cylinder case area. SFI Spec 7.1 devices must be
updated/recertified by the original manufacturer at one-year
intervals. In classes where specified, a belly pan may be used in
lieu of a device attached to the engine. The belly pan must extend
from framerail to framerail and extend forward of the harmonic
balancer and to the rear of the engine block and must incorporate a
minimum 2-inch-high lip on all sides unless specified in Class
Requirements. Minimum number of slots or holes in the walls to
clear frame, steering, or lines permitted. A nonflammable, oilabsorbent
liner mandatory inside of retention device.

Your looking to hard there Vern, unless your planning on stepping way up in class, the retention blanket doesnt have to be SFI, it just has to be NHRA approved, I ran one for about 3 years since the Salt Lake City track required it on any car faster than 10.99, there are several people who will make one fairly resonable. I had a Russler brand the bottom was ok, fit well the straps were kinda chincy, thats been well discussed on here, but a custom made one for fit was a little under $200, I ruined mine on a very rough track, right after I mover here, Marion County up in Ohio will make you hit the brakes a little hard in the shutdown area, anyway I scrapped the bottom on mine.NHRA has a list of ones that are accepted, they just got a little cash from those guys, SFI would have cost them more for sure

Someone wanted pics of the custom diaper, so here they are:

2nd one:

Last:

There are 4 straps that attach to the header with a bracket. Two to the front header bolts, but the rear two were too close to the tubes, so I drilled and tapped the flange between 6&8 and 5&7 to use studs so the bracket can be pulled up and slipped over the stud. To change the oil I have to drop the drag link (I use the bushings from Mike Roth so it slips off easily) and drop the back of the diaper. It's a pain, but DRE didn't want to put a flap in the bottom for fear it may leak. Having the diaper on and off about 40 times over the years; you learn a few tricks to make it easier. Also, we never start a fresh engine with the diaper on to check for leaks, so the drag link comes off again. The bushings are the cats meow.

I just have a hard time understanding. what good a diaper going to do with holes in it.