mdacton

How long are 4.1 tans shields good for? 5 years?

and the date on the tag is the manufacturers date or the date it expires?

I have seached for a list of SFI regulations. Anyone know where to find it, I'm sure its on nhra/ihra but I cannot find the list.

cnorton

There's a reference table in the back of the NHRA Rulebook. It says that the "rigid" shield is good for 5 years and that the "flexible" shield is only 2. I believe that the date is the date of manufacture.

c

Stephen 87 IROC

NHRA and IHRA say 5 years for all tranny shields. Flexplate shields are 5 years but flexplates are only 3 years.

If the flexible tranny shield (tranny blanket) is only 2 years then they're changed the rule since my old rule book.

The date on the tag is the manufactured date.

cnorton

2008 NHRA Rulebook, page #278-279
4.1 rigid transmission shield, 5 years
4.1 flexible transmission shield, 2 years
27.1 window net (mesh), 2 years (couldn't find that last time I looked)
29.1 automatic transmission flexplate, 3 years
30.1 automatic transmission flexplate shield, 5 years

c

Stephen 87 IROC

Damn NHRA making it harder for the sportsman racer again. I guess buying a blanket isn't going to be worth it when my shield expires again.

I normally run under IHRA rules which isn't as strict for the sportsman racer however I need to also have my car pass NHRA rules in case my sponsor wants me to travel to an NHRA track.

It's also good to see a distinction for the window net. Mesh nets expire. Ribbon nets don't. I don't know anyone that still uses a mesh net.

CSJTA

Ya got to get it down the track first

mdacton

Oh I can get it down the track..... either leaking or something broken


But I got the CSR molded shield/flexplate and trans. It will fit a 4th gen but its a real bitch to put in. I had to lower the rear of the K-member to get to the bolts. Huge PITA but I didn't want to add a lot of weight.

one like this

cnorton

md, I thought that putting a CSR shield on a 4th gen with a stock floorpan would be a challenge when you asked the question awhile back. Sounds like it's time for some serious floorboard work. Sometimes it's hard to start swinging the hammer but you'd might as well bite the bullet and save yourself some grief down the road.

Good luck,

c

OneFlyn95z28

From what I was told the Window Net rule only applies if the rules in your class mention it. I just bought a new one then was told my off one was fine.

I never had a chance to put my CSR full shield in before going to a TH400. It is sitting on top of my tool box

cnorton

The two-year limit on mesh window nets is only enforced when the class you're running requires a cage (and a cage specifies a net). When I run my car in SS/JA it doesn't require either and my "old" mesh net is fine. Neither does it require a dated flexplate, transmission shield, or flexplate shield. If I take out 300 pounds to switch to SS/IA, all those items become required and the dates become an operative factor. Due to the "mandated costs" associated with going faster, it's more economical to keep the weight in the car and go a little slower.

tomcowle

Mr. Norton, isn't Super J Automatic less "populated" too? Another good reason.

As I typed this I see a few Super J automatic for sale in ND this week.

cnorton

Tom, actually, for the current racing year, at the time of the last report from Nitro Joe's Racing Stats (the bible for class racers) SS/JA as a class had more discrete entries than any other Super Stock class. Under the competition rules in NHRA for Super Stock classes, that makes it a better place to run if you have a fast car in the class. Ed Wright (on this board) also competes in SS/JA with an LT1 combination.

In reality, I believe that my car likes to run in SS/IA a little better. Removing 300 pounds is a serious change but the car really likes it when I make the changes to the suspension. I have run it in SS/HA as well but I never managed to get the chassis balanced quite right for the 2820# minimum weight. I needed to give it a little more time and effort.

c

OneFlyn95z28

My times make it required because I am required to have a cage. Actually if you are required to have a cage you are required to have the net.

I hate the damn thing to. Wish they would let us use arm straps