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#1 |
Senior Member
Join Date: Jul 2002
Location: Lindsay, TX
Posts: 1,245
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Small progress - crossmember exhaust holes
Got a little done over the weekend. I got some 4.5" pipe and cut a couple not so square 1" rings, took forever on the saw. Then I welded in some tabs on the holes in the frame. Used a bi-metal 4.5" hole saw and cut some holes. That part sucked! Wasn't easy at all. Then I tapped the rings in place and ground some of the paint away. Welded them in while laying under the truck. Had a couple nice size pieces of slag land inside my ear. Love the smell of burning hair. Then I wire brushed it and cleaned it up and threw on some POR-15. Now all I need is a trailer to pull it up to the exhaust shop. Throw some exhaust on it and get it timed and Im on the road
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68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille |
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#2 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Small progress - crossmember exhaust holes
Nice mod.That`s the way to do it!I need to do the same on my frame.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#4 |
GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: Small progress - crossmember exhaust holes
Looks Good!!
![]() Why trailer it? Drive it! It won't hurt a thing. And probably the only time you will get to do it. If you have an apponitment the cops probably won't give you any trouble either. ![]() Slag while on your back does suck doesn't it ![]() |
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#5 |
Registered User
![]() Join Date: Nov 2002
Location: Lebanon, Tennessee
Posts: 1,372
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Good work! That mod is "on my list".
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__________________
Jeff '67 short Fleet; my ongoing project. '66 long Fleet; my original "baby." Live life or bust trying. |
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#6 |
Too Many Clubs Club
Join Date: Jul 2003
Location: Kilgore, Texas
Posts: 443
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Re: Small progress - crossmember exhaust holes
Drilling those holes was a major P.I.T.A. wasn't it?! Looks great, I kinda wish I had welded a strengthening ring in mine when I did that.
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How I installed my air bags... |
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#7 |
Senior Member
Join Date: Jul 2002
Location: Lindsay, TX
Posts: 1,245
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Re: Small progress - crossmember exhaust holes
Thanks guys
Maybe Im being paranoid, but I know its not timed great, and I did drive around a little bit before. The only reason I wanted to trailer it was b/c Im paranoid about doing some damage, like burning a valve or something, but then again, I dont really know. Maybe I will have to b/c we dont have a car trailer.
__________________
68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille |
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#8 |
GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: Small progress - crossmember exhaust holes
You do want to get the timing dialed in atleast real close before you make a longer road run.
What are you running manifolds or headers?? If open headers you will be fine. If open manifolds you can run into a problem of them being short and really heating up the under hood temp. and heating up the oil pan but, Before I learned that some pipe is better for performance than none I ran open header on the race car and about half a million guys still do. The exception here is if it were real cold out when you shut it down you could maybe have a problem but still slim. RJ22... ![]() |
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#9 | |
Senior Member
Join Date: Jul 2002
Location: Lindsay, TX
Posts: 1,245
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Re: Small progress - crossmember exhaust holes
Quote:
Your not kidding, I thought I had burned up our 1/2" drill several times, and I felt like it was going to break my wrist when it bit.
__________________
68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille |
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#10 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,977
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Re: Small progress - crossmember exhaust holes
I've done this very mod on another of my trucks years ago. Lately I've seen several board members go through the effort w/cutting the pipe.... cut it down to some 'rings'..... cut holes in the c.member for the rings.... & then weld it up. I've been thinking of doing it again for my 68 but what a pain to do it w/the truck together. The more I think about it.... the more I re-think how it can be done.
Why not drill 4x 1/2" holes to make an outline for 1 larger hole that can be cut straight w/a sawzall, cut-off wheel, or plasma (you know, connect the dots). Then cut 4x plates to 'box' the engine side of the c.member (2 for ea side of truck; 1 for ea side of the holes in the c.member). Weld them top & bottom & you have re-inforced the c.member w/some boxing plate & you also get even larger holes for a little more exhaust clearance. I think this is how I'll do my 68.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 07-04-2007 at 12:20 AM. |
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#11 |
Commander Taco Bello
Join Date: Sep 2006
Location: Des Moines, Iowa
Posts: 2,232
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Re: Small progress - crossmember exhaust holes
i tried that exact approach, welding in tabs, and using a hole drill.... after about ripping my arm off a couple times when it bit in, i finally snapped the drill bit and gave up. what i ended up doing is tacking the tube in place and torching out the center. then ran some good welds around the tube to hold it in place for good.
not nearly as clean, but it worked. |
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#12 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: Small progress - crossmember exhaust holes
Looks like a good mod to me.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#13 | |
GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: Small progress - crossmember exhaust holes
Quote:
BTW Thank You pat I would not suggest anything that I would even have a second thought about there being a problem with. Just think about exhaust cut-out's most of them are right at the collector and also how mant street rods have you seen at show with zoom tubes and no collector to speak of. YOU WILL BE FINE. ![]() RJ22... ![]()
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72 SWB 2WD MY PROJECT 72 LWB 4X4 FUTURE PROJECT SUBSCRIBE HEREBOARD VENDORS HERE NORWOOD MEET SURVIVOR! ![]() Last edited by RACINJASON22; 07-04-2007 at 01:38 AM. |
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#14 | |
Junior Member
Join Date: Jul 2006
Location: Delran, NJ
Posts: 458
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Re: Small progress - crossmember exhaust holes
Do you mean you wire brushed the frame or your ears?
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#15 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: Small progress - crossmember exhaust holes
Good idea welding the tab in there. I thought about this after I had finished mine,
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#16 |
Senior Member
Join Date: Jul 2002
Location: Lindsay, TX
Posts: 1,245
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Re: Small progress - crossmember exhaust holes
I was outta Q-tips
Looks good Hart Rod!
__________________
68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille |
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#17 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: Small progress - crossmember exhaust holes
Thanks Pat. It was a lot of work, but I'm sure it will pay off when I have the exhaust run. Keep the pictures coming.
R
__________________
Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#18 |
Cowboy Fan for Life!!!!!!
Join Date: Apr 2002
Location: Amelia, Virginia
Posts: 2,921
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Re: Small progress - crossmember exhaust holes
"Had a couple nice size pieces of slag land inside my ear. Love the smell of burning hair."
Dude, there are easier ways to get rid of that annoying ear hair. ![]() Nice mod, how long did each side take with the hole saw?
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1967 ShortBed Fleetside 3/4 Drop 350/700R4 Tilt wheel 18 x 8 Torque Thrust II's Future mods: All new gauges & wood bed My Zip is 23002 I ship UPS, USPS Last edited by Bamm; 07-05-2007 at 05:27 PM. |
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#19 |
Senior Member
Join Date: Jul 2002
Location: Lindsay, TX
Posts: 1,245
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Re: Small progress - crossmember exhaust holes
HA!
If I had to guess, probably 15 solid minutes each.
__________________
68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille |
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#20 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: Small progress - crossmember exhaust holes
nice work, nice to see im not the only one welding with flexcore
![]() i say go for the open header drive, fire it up and set the timming then drive to the shop and get your exhaust
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#21 | |
Senior Member
Join Date: Jul 2002
Location: Lindsay, TX
Posts: 1,245
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Re: Small progress - crossmember exhaust holes
Quote:
Thats just the thing though, I dont really know how to time it other than just turning the dizzy and listening to it.
__________________
68 Chevy 383/350 w/shift kit, 380hp/425ft-lbs, 4.5/5 drop, 17" TT2s 64 Cadillac Sedan DeVille |
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#22 |
PITbut
Join Date: Sep 2007
Location: monroe washington
Posts: 3,052
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Re: Small progress - crossmember exhaust holes
dont mean to bring this back from teh dead, but where do you get some 4" diameter pipe to run the exhaust through???
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#23 |
Registered User
![]() Join Date: Aug 2005
Location: Hillsboro Oregon
Posts: 6,449
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Re: Small progress - crossmember exhaust holes
I started this very mod on mine the other day. Got the DS hole cut after breaking one bit. It helps to do a little cutting from each side. Also I positioned mine as high/outboard as possible to give more distance to the trailing arms and a better shot at clearing them. I'll be running 50 series flows between the tranny xmember and the ta xmember. The offset/offset (opposite inlet/outlet) config looks like it's going to work perfectly there.
Last edited by Frizzle Fry; 06-03-2008 at 10:23 PM. |
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#24 | |
PITbut
Join Date: Sep 2007
Location: monroe washington
Posts: 3,052
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Re: Small progress - crossmember exhaust holes
Quote:
Your truck also is bagged in the rear with trailing arms right?? |
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#25 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,977
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Re: Small progress - crossmember exhaust holes
The stuff I've used I picked up @ my local steel yard in their 'scrap/drop-off' pile.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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