Thread: Question for techinspector1

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Richard.
I have a small obstacle to overcome. Hope you can shed some light . I'm installing cage tubes and came across the rule [You can't cut into the Forward Cross Member/Foot Brace]. I had planned to notch the 2''x3'' tube to allow for 4" exhaust. But that's a no no I see by the rules. Greg (An official @ Rt 66 works @ the Chevy Dealership just 2 blocks from me. He's great about giving me pointers, but is off today. I talked to him last night and he said he would bounce my dilemma off a tech guy. Later last night i came up with this idea of turning the 2''x3'' tube on it's side (Or using a 2''x2'' tube if I can. This set-up would mean a 1" rise in the floorboard @ the cross brace but would give me the needed clearance for the exhaust. I may be able to weld the cross brace flush with the top of the main frame rail, but then it gets pretty tight for the exhaust. I'm sure I'm not the first to run into this? Is there a better way to do this than my idea in the drawing below and would this pass tech?? I'm open to ideas.

I plan to dump the exhaust through the rocker panel in front of the back bracket, so that 1 isn't an issue. Thanks for your input.
pro70z28

See if this is a better pic.???

Where fore art thou Richard?

Originally posted by pro60chevy
Where fore art thou Richard?

If I'm reading it right i can replace the 2''x3'' with .118 - 1 5/8" round. That would give me plenty of room if I can do that. It looks to me like if I use anything but straight and level tubes for the cross members, I need to use .35 STEEL flooring from the frame rail to the rocker bar???

Originally posted by techinspector1

where are you reading all this, is it on a SFI 25.1 spec??

SFI 25.''4'' spec. Print date is june 14, 2002. But I emailed them a couple months ago and they said it was still current. According to the material list the forward cross members 6A & 6B can be either 2''x3'' .083'' or 1 5/8" .118" round. I didn't find that until tonight. If I bend them for exhaust clearance looks to me like I then have to make the "Frame rail to rocker bar" floor sheeting out of .035" steel?? I think using the 1 5/8" round will give me the header clearance I need. Can the roof diagonal and the windshield halo bar be bent to conform to the roofline?

pro 60, the 72 camino i just sold was made out of 1 5/8 at both mounting points , and mine went 25.1 cert in april 04 . the only problem i had was i had put the stainless tank in front of the radiator and did not put a 1 5/8 tube guard around the cell , i had one under it , but not above it .

Originally posted by techinspector1
Yes pro, I see no problem with the halo and diagonal being bent to conform. You may encounter some opposition if you put a bend in the dash bar though.

Thanks Richard.
I'll probably have other questions before this thing is done. But, the more I get into the SFI book the more sence it's making. It's actually explained pretty well once I figured out which drawings are applicable to my set-up.