’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dsraven · 02-05-2021, 12:19 PM

kinda hard to tell from the pics but it looks like the final turbo exhaust outlet is pretty close to the firewall or trans hump. did you need to cut into the cab for clearance at all?
nice innovations. keep designing stuff in your head while you rock the baby. congrats on that by the way.

lower50's · 02-09-2021, 11:36 AM

Killer Job!!! I like where this is going, the compound setup should work really well and fits in there nice. Do you have an idea for HP and TQ numbers?

reg3 · 02-10-2021, 06:50 AM

Quote:

Originally Posted by dsraven

kinda hard to tell from the pics but it looks like the final turbo exhaust outlet is pretty close to the firewall or trans hump. did you need to cut into the cab for clearance at all?
nice innovations. keep designing stuff in your head while you rock the baby. congrats on that by the way.

I didn't have to cut in to the firewall to clear the downpipe, it does run about 1" away from the sheetmetal at its closest point, so i was planning to run some wrap there to keep the paint from blistering.

Quote:

Originally Posted by lower50's

Killer Job!!! I like where this is going, the compound setup should work really well and fits in there nice. Do you have an idea for HP and TQ numbers?

Using the old butt-dyno, I am hoping to land somewhere in the 250HP range with some garage/street tuning. Maybe someday ill get it to a real dyno and see what this setup can actually put out.

dsraven · 02-10-2021, 09:52 AM

A heat shield between the body the exhaust would possibly help. Wouldn't wanna catch your flooring on fire or if no flooring melt your riders sneakers soles.

lower50's · 02-11-2021, 09:03 AM

I think you should be good with wrapped exhaust 1" away, I have been running that with my exhaust for 5 years with no prob.

reg3 · 02-14-2021, 09:53 AM

Switched gears a bit and build a bracket for the transmission cooler (pun intended). I cut out some brackets and tabs and used a few spare pieces of 1x1 square tube I had in the shop. I welded the tabs to the frame and mounted it at a 45* angle so it doesn’t hang down too low. I also picked up some nifty vibration dampening studs from McMaster to mount the cooler to the bracket. Now I just need to pick up some tube end fittings to finish up the plumbing and she’ll be all done. On to the pics…

**8man** · 02-14-2021, 10:21 AM

That is some really nice fab work.

02-05-2021, 12:19 PM	#51
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 7,823	Re: ’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air kinda hard to tell from the pics but it looks like the final turbo exhaust outlet is pretty close to the firewall or trans hump. did you need to cut into the cab for clearance at all? nice innovations. keep designing stuff in your head while you rock the baby. congrats on that by the way.

02-09-2021, 11:36 AM	#52
lower50's Registered User Join Date: Oct 2014 Location: Kitchener, Ontario, Canada Posts: 3,254	Re: ’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air Killer Job!!! I like where this is going, the compound setup should work really well and fits in there nice. Do you have an idea for HP and TQ numbers? __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=648459 https://67-72chevytrucks.com/vboard/...d.php?t=769441 1951 MG TD 1967 Jeep CJ5 1.9L TDI 33X13.5X15 Mud Grapplers. 1952 GMC 9700 p/u 7.3L diesel on air, dually

02-10-2021, 09:52 AM	#54
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 7,823	Re: ’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air A heat shield between the body the exhaust would possibly help. Wouldn't wanna catch your flooring on fire or if no flooring melt your riders sneakers soles.

02-11-2021, 09:03 AM	#55
lower50's Registered User Join Date: Oct 2014 Location: Kitchener, Ontario, Canada Posts: 3,254	Re: ’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air I think you should be good with wrapped exhaust 1" away, I have been running that with my exhaust for 5 years with no prob. __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=648459 https://67-72chevytrucks.com/vboard/...d.php?t=769441 1951 MG TD 1967 Jeep CJ5 1.9L TDI 33X13.5X15 Mud Grapplers. 1952 GMC 9700 p/u 7.3L diesel on air, dually

02-14-2021, 09:53 AM	#56
reg3 Registered User Join Date: Feb 2015 Location: CT Posts: 30	Re: ’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air Switched gears a bit and build a bracket for the transmission cooler (pun intended). I cut out some brackets and tabs and used a few spare pieces of 1x1 square tube I had in the shop. I welded the tabs to the frame and mounted it at a 45* angle so it doesn’t hang down too low. I also picked up some nifty vibration dampening studs from McMaster to mount the cooler to the bracket. Now I just need to pick up some tube end fittings to finish up the plumbing and she’ll be all done. On to the pics…

02-14-2021, 10:21 AM	#57
8man Senior Member Join Date: Sep 2017 Location: Bryan, Texas Posts: 2,266	Re: ’48 GMC Build – Cummins 4BT, 47RH, IFS, 4-Link, Air That is some really nice fab work. __________________ 8man-aka Robert 1948 on a S10 Frame, small block with a carb 1954 Cab, 53 Front and Bed, 50 Doors, S10 Frame, Power TBD Build thread: "]http://67-72chevytrucks.com/vboard/showthread.php?t=746899&highlight=wife%27s+48[/URL] [/URL]http://67-72chevytrucks.com/vboard/showthread.php?t=840204



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