Drag Racing Tech - SFI 25.3 rollcage (6.50 cert), Overbeek Rear Prostock Wing and Dual chutes finished

This is a 25.5 to 25.3 upgrade I've been working on for a while now...ended up adding or replacing something like 25 bars :eek:

Added the last of the gussets yesterday and started painting it today. Got the first coat done in the driver area, need to put a coat on in the rear area, then do a 2nd coat. Using Rustoleum HAMMERED paint...stuff is pretty bada$$ :nod:

Going to try to cert it in a few weeks...once certed, I'll get all the floor pans fully welded in...

Driver side
http://home.comcast.net/~tfranklin5580/25p3_1.jpg

Driver side roof
http://home.comcast.net/~tfranklin5580/25p3_2.jpg

Passenger side
http://home.comcast.net/~tfranklin5580/25p3_3.jpg

Passenger side roof
http://home.comcast.net/~tfranklin5580/25p3_4.jpg

windshield gussets
http://home.comcast.net/~tfranklin5580/25p3_5.jpg

Rear bars (still need to paint this area)
http://home.comcast.net/~tfranklin5580/25p3_6.jpg

Undercar bars (picture taken during construction
http://home.comcast.net/~tfranklin5580/25p3_7.jpg

Also finished the Joe Van Overbeek Rear Wing setup and dual parachute mount...

http://home.comcast.net/~tfranklin5580/wing7.jpg
http://home.comcast.net/~tfranklin5580/wing8.jpg

looks like a jungle gym of bars jk looks awsome

man thats a lot of work....looking good......

For the same reasons you just mentioned I just ordered the 25.3 book today (after already buying the 25.4 book) since its being built right now to give it a little added value and to save a ton of time and money down the road if I ever need that spec. It's always better to have a little more than not enough.

Looks good BTW!!

Looking way cool.:pimp:

Coach

does john force know you stole the cage out of his funny car? looks great. i like the way the paint looks too.

Added the wing stuff to the first post.

Looking good... Best of luck with it...

Looks great. I have a dumb question though, I thought 25.3 required rear frame rails all the way to the back. I'm going by memory, I don't have the book in front of me, I could be wrong.

There is a unibody variation listed in the spec... Says two 1 5/8" bars of any length on 6x6 plates.

There is a unibody variation listed in the spec... Says two 1 5/8" bars of any length on 6x6 plates.

Good. I'm planning on doing the same thing to mine (25.5 to 25.3). I don't really want to add any more than I have to. If you remove the stock floors & replace with sheet metal, does that "delete" the uni-body rule?

Good. I'm planning on doing the same thing to mine (25.5 to 25.3). I don't really want to add any more than I have to. If you remove the stock floors & replace with sheet metal, does that "delete" the uni-body rule?

yes...that variation assumed stock floors remained.

yes...that variation assumed stock floors remained.

Thanks, I guess I have a choice to make.

I need to verify availability, but I plan on taking the car for cage certification wednesday night.

Also, a few weeks ago I dropped off my pontiac emblem wing strut supports (that go on the bumper) to a local shop that is doing a brand new spray "chrome" process (its actually silver-based). They got the chrome part done. The next step is to leave the border and the tabs chrome and do the rest of it in a translucent red. Should look "close" to an actual pontiac emblem when finished :nod:

here is one of them after the "chrome" step

http://home.comcast.net/~tfranklin5580/wing_strut_support.jpg

they should look similar to this when done
http://www.motorvista.com/pictures/pontiac/pontiac-emblem.jpg

Very cool!! How fast ya planning to go??

Very cool!! How fast ya planning to go??

faster than 7.99 ;)

I just picked up the finished pieces...came out sweet :nod:

http://home.comcast.net/~tfranklin5580/chrome.jpg

Looks like they came out nice! Haven't seen anyone do anything like them yet.

faster than 7.99 ;)

I just picked up the finished pieces...came out sweet :nod:



7.98 biatches!

Looking good Brian; digging the pontiac touch on the supports!

Derek

Looking good Brian; digging the pontiac touch on the supports!

Derek

Me too! Very nice.

loving the supports, just little stuff like that make the difference between a decent clean car and a great car

made my certification appt...going tuesday the 6th...

Good luck Brian. Cage looks great...should pass with all the thought you've put into it.

woohoo...cage certified tonight!!!

Awesome! Looks like a ton of extra bars in the cage. I take it that is all part of the cert. process? That cage has got to weigh a ton any idea on the cage alone?

yes...almost all the bars were required by the spec. there are a few optional bars that I put in for extra precaution (didn't need them due to being unibody). Also added 3 extra gussets that weren't required by spec, but they were a good idea overall.

weighs probably 150-180lbs

we've weighed a 8pt sportsman cage and it came in at ~75lbs. this has double the bars easy.

Very nice work Brian! Car looks great!!!

Looks good Brian. Is the wing carbon?

Looks good Brian. Is the wing carbon?

yeah...clear-coated carbon...leaving it natural

looks awesome man good luck with the project

Looks awesome. What do you think your raceweight will be?

yes...almost all the bars were required by the spec. there are a few optional bars that I put in for extra precaution (didn't need them due to being unibody). Also added 3 extra gussets that weren't required by spec, but they were a good idea overall.

weighs probably 150-180lbs

we've weighed a 8pt sportsman cage and it came in at ~75lbs. this has double the bars easy.

uuggghhh.... crap i'm having a hard enough time as it is keeping this thing close to 3300lbs.... :(

Looks awesome. What do you think your raceweight will be?

3200lbs

yeah...clear-coated carbon...leaving it natural

Hell yea. Thats gonna look damn good....

thats hammertone black? kinda looks gray

thats the "black"...it does come out dark grey

Congrats!

I have a few noob questions for you guys since you're already here... :)
At what Et/mph do you need to have a roll cage like that?
Why is the roll cage called a "25.5/25.3"?
Why is the "25.3" and upgrade to a "25.5"?
How fast can you go in the 1/4mi with a 10/12pt roll cage?

thanks :)

Congrats!

I have a few noob questions for you guys since you're already here... :)
1. At what Et/mph do you need to have a roll cage like that?
2. Why is the roll cage called a "25.5/25.3"?
3. Why is the "25.3" and upgrade to a "25.5"?
4. How fast can you go in the 1/4mi with a 10/12pt roll cage?

thanks :)

Ill take a crack at this :)

1. 8.49 or quicker in the 1/4 will need a SFI chassis
2. The 25.5 25.3 25.2 etc is a SFI spec for a chassis/cage. They do that since it is an advanced ET and is much more complicated than a 10 point. There is actually a book for each cert.
3. I dont remember the exact difference from 25.5 to 25.3, but I think 25.3 lets you go faster with less weight than 25.5, but more weight than 25.2? I am not 100% on that, but I know 25.3 is somewhat aimed at radial racers because of they were falling between the two specs.
4. You can go 8.50 with a 10/12 point.

Hope that helps!

Sean

thanks! I guess i'll be going with a 10/12pt then :)

Ill take a crack at this :)

1. 8.49 or quicker in the 1/4 will need a SFI chassis
2. The 25.5 25.3 25.2 etc is a SFI spec for a chassis/cage. They do that since it is an advanced ET and is much more complicated than a 10 point. There is actually a book for each cert.
3. I dont remember the exact difference from 25.5 to 25.3, but I think 25.3 lets you go faster with less weight than 25.5, but more weight than 25.2? I am not 100% on that, but I know 25.3 is somewhat aimed at radial racers because of they were falling between the two specs.
4. You can go 8.50 with a 10/12 point.

Hope that helps!

Sean

almost correct...

25.3 lets you go 1sec faster at the same weight (3600lb max) compared to a 25.5.

25.5 is 7.50 et at 3600lb
25.3 is 6.50 et at 3600lb
25.2 is 6.00 et at 3200lb

almost correct...

25.3 lets you go 1sec faster at the same weight (3600lb max) compared to a 25.5.

25.5 is 7.50 et at 3600lb
25.3 is 6.50 et at 3600lb
25.2 is 6.00 et at 3200lb

Well I was close :) I knew it was faster, but I thought it was a different weight. Maybe I was thinking of the weight difference between 25.2 and 25.3

Sean

Other than some paint, the floors are done. made a few patch panels welded everything in and seam sealed the joints...just another "stock floor" 25.3 :jest:

http://home.comcast.net/~tfranklin5580/floordone1.jpg
http://home.comcast.net/~tfranklin5580/floordone2.jpg

update:

thought some would like to see a pic of the finished wing installation...hatch holes are filled and the car is painted :nod:

http://home.comcast.net/~tfranklin5580/body_paint_7.jpg

that thing is crazy!!!!!!!!

Looks hawt what color is that?

summit racing (kirker) carbon fiber metallic....decided to go cheap on the paint route since its a racecar :jest:

summit racing (kirker) carbon fiber metallic....decided to go cheap on the paint route since its a racecar :jest:

I really like that color. I saw it a while back in one of my summit mags. Car looks great man.

Where are you guys getting the books for the 25.3 cages?

http://www.sfifoundation.com/

http://www.sfifoundation.com/

Thanks Fireball :usa:

What do you still have an antenna hole on the car for?? LOL

Car looks good painted man!

What do you still have an antenna hole on the car for?? LOL

Car looks good painted man!

What do you still have an antenna hole on the car for?? LOL

Car looks good painted man!


For my radio of course :jest:

looks good man. ive been away from the site a long awhile so im glad to see your still pushing the car.

looking killer

do you have to pull the motor to get the transmission out of the car?

Very nice. Looks like a lot of work.

do you have to pull the motor to get the transmission out of the car?

nope.