Certification book
#530443
11/18/09 11:57 PM
11/18/09 11:57 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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Rock Springs
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Which Certification book do I need? I want my car to cert to 8.50..Looks like my car has a chassis built that will not meet spec. What is the diff between 25.3 and 25.4-25.5? The main frame rails are ok which are 2x3 1/8th thick. The rest of the chassis floor pan bracing, and trans tunnel needs to be ripped out etc. Heck the floor pans are steel and .090 thick. My chassis guys wont put the cage in and cert it like it is. The car has no rocker bars etc. So the idea is to add only the bars needed in the proper places to make this thing safe, and worth something. As you can see the frame rails really dont have much support between the two..If It takes alick in the side there is nothing really keeping them from bending together. Also the trans tunnel is pretty small, and shallow. Lots and lots of bars can be removed and replaced by single larger stuffer bracing in key area's.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Certification book
[Re: Bob_Coomer]
#530444
11/19/09 12:02 AM
11/19/09 12:02 AM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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Rock Springs
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Yes I found this out after the car just back from painting...
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Certification book
[Re: TS3303]
#530448
11/19/09 12:23 AM
11/19/09 12:23 AM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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Here is my main concern. The drive shaft area. adding bracing between the frame rails wont be hard. But doing so to not come through the interior or interfere with the drive shaft. I would rip everything out except the 2x3 frame rails and the other 2x3 were the roll cage sits. Add the bracing were one brace can be used for my seat bracket, then add the other one. Then also the rocker bars. Looks like 2x2 tubing will work here.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Certification book
[Re: TS3303]
#530452
11/19/09 03:25 AM
11/19/09 03:25 AM
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Joined: Dec 2005
Posts: 11,668 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,668
Fulton County, PA
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If you only want it to cert to 8.50, you don't need to be concerned with any of the SFI stuff. The specs in the NHRA Rule Book will be what they will be using. The 2x3 rails will be OK. It will need a rocker bar on the drivers side minimum (usually put it in on both sides), bracing under the seat and a legal cage. No funny car cage needed at 8.50. Can be mild steel, MIG welded. Obviously, the tubing has to be the correct size and thickness and the welds and construction have to be done correctly. Once you decide to go quicker than 8.50, things become more complicated.
Looking at your photos again, I will agree that most of what's there should come out and what's left be made right. All that 1x1 and the other small stuff does nothing but hold the floor and will not have any relevance to a certification. I always like to use some X bracing in the floor between the frame rails and even diagonals between the frame rails and the rocker bars. Even if it's not needed for cert, it stiffens the car substantially.
Last edited by CMcAllister; 11/19/09 03:39 AM.
If the results don't match the theory, change the theory.
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Re: Certification book
[Re: Blucuda413]
#530454
11/19/09 02:15 PM
11/19/09 02:15 PM
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Joined: Mar 2006
Posts: 9,910 Eighty Four, PA
B G Racing
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Don't forget without your stock floor you also need a knee bar between the 2 front uprights. I would also think the rocker bars should be on both sides.
Removing or altering 1 square foot of floor requires installing rocker bars,1 square foot of firewall requires knee/dash bar.
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Post deleted by Defbob
[Re: Blucuda413]
#530455
11/19/09 03:25 PM
11/19/09 03:25 PM
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Anonymous
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Anonymous
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Re: Certification book
#530456
11/19/09 04:06 PM
11/19/09 04:06 PM
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Joined: Apr 2004
Posts: 1,981 SE Michigan
TS3303
top fuel
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top fuel
Joined: Apr 2004
Posts: 1,981
SE Michigan
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Quote:
Go for an 7.50 with all the access you have now and the chance to go the extra mile .in the long run it's a smart move
Thats good advice. You can always do the 7.50 spec and add the FC cage later if that bothers you.
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Re: Certification book
[Re: TS3303]
#530457
11/19/09 04:46 PM
11/19/09 04:46 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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OP
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Posts: 6,293
Rock Springs
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Thanks guys good advise...I wished I knew this before hand. I have know one to blame but my self..I just didnt do my home work. I will make it right. My current plan is to go ahead and make the floor and chassis ready for 7.50 cert. add all the necessary bars now. And just forgo the 8.50 cert. Then it will just need the addition of a funny car cage and a few odd and ends to make the jump..
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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