SFI 25.3 rollcage (6.50 cert), Overbeek Rear Prostock Wing and Dual chutes finished
07-07-2010, 06:15 AM
#26
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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.
weighs probably 150-180lbs
we've weighed a 8pt sportsman cage and it came in at ~75lbs. this has double the bars easy.
07-13-2010, 09:16 AM
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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.
weighs probably 150-180lbs
we've weighed a 8pt sportsman cage and it came in at ~75lbs. this has double the bars easy.
07-30-2010, 10:45 PM
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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
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
07-31-2010, 12:24 AM
#38
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
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
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
07-31-2010, 02:47 PM
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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
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
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