1979 C-10 Shop/Race Truck Build

HP HUNTER · 10-06-2023, 09:26 AM

When the rear end was installed we went from a 13.9 to 13.4 ET at high altitude, but I still felt the truck didn't pull through low gear like it should, 1.92 60 foot, knowing the stocker trucks went 1.77 @ Denver this bothered me, although I knew they were 300 pounds lighter, but didn't have my HP. My focus turned to the driveline which is a disaster on a 79 C-10, heavy rear brakes, heavy discs up front, which only accept a heavy tire rim combination, 6 lug. So I looked at the Lamb front brake setup and decided I didn't want to spend the money and wait (wish I had) so I tried to go the LM1 Camaro front disc setup which required I believe a 1981 and newer front spindel, but could never figure out the caliper setup so I had the original style heavy front discs redrilled for a car bolt pattern. I now could get a race style front tire and rim on the truck. I still had the ultra heavy 2 piece drive shaft robbing me............................

HP HUNTER · 10-06-2023, 09:37 AM

So we headed for Kearney Nebraska 2130 feet elevation 4300 DA with bad humidity and ran 12.80 @ 105 MPH but still a horrible 1.82 60 foot, still in the back of my mind a not so quick stocker truck runs 1.77 60 in Denver running 13.8s? I've got something going on here...................

1320/105 = 12.57 getting robbed

Anything that can be done to hit the tires harder at this point only responds with a drastic reduction in ET-more to come.

HP HUNTER · 10-06-2023, 09:45 AM

Keep in mind at this point this truck has been running about 6 1/2 years from the time it was built to the 12.80 @ Kearney and has about 20,000 miles on it, mostly with the 5.13 gear, we drove it a lot, and the late Harold Bettes felt pretty comfortable over in the passenger seat going lunch!

Tim H · 10-06-2023, 10:20 AM

Just how much time was spent porting the heads ? I realize that is something you have a lot of experience in.

HP HUNTER · 10-06-2023, 10:37 AM

Quote:

Originally Posted by Tim H

Just how much time was spent porting the heads ? I realize that is something you have a lot of experience in.

Heres some information on the 327 build:

Heads from start to finish maybe 40 hours approx
Flow @ 28 inches SF 600 4.030 bore, 2.020 Intake valve

.200 don't remember
.300 193
.400. don't remember
.480 239
Peak 259 around .650 lift

Hp was 445 HP @ 6600 RPM
TQ was 400 for one RPM point, 390s flat for a long time

HP HUNTER · 10-10-2023, 10:01 AM

So we moved to Texas, I ran the truck @ 450 feet elevation, 2000 DA with the 327 which resulted in a 12.13 @ 107+ with a 1.63 60. at this point I knew the truck would never run 11s in the heat so I decided to build a 350 hoping this would put it into the 11s. Notice my ET @ Kearney 2130 feet 12.80 dropped to 12.13/7.63 @ Little River 450 feet. My drive line losses were showing what every bit of extra power was worth.

1320/107.5 = 12.27 much better at this point, but far from done..........

Kirk Morgan · 10-10-2023, 07:08 PM

Are you doing dyno work in Texas? Little River has a lot of history.

10-06-2023, 09:26 AM	#1
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 656 Likes: 82 Liked 373 Times in 129 Posts	Re: 1979 C-10 Shop/Race Truck Build When the rear end was installed we went from a 13.9 to 13.4 ET at high altitude, but I still felt the truck didn't pull through low gear like it should, 1.92 60 foot, knowing the stocker trucks went 1.77 @ Denver this bothered me, although I knew they were 300 pounds lighter, but didn't have my HP. My focus turned to the driveline which is a disaster on a 79 C-10, heavy rear brakes, heavy discs up front, which only accept a heavy tire rim combination, 6 lug. So I looked at the Lamb front brake setup and decided I didn't want to spend the money and wait (wish I had) so I tried to go the LM1 Camaro front disc setup which required I believe a 1981 and newer front spindel, but could never figure out the caliper setup so I had the original style heavy front discs redrilled for a car bolt pattern. I now could get a race style front tire and rim on the truck. I still had the ultra heavy 2 piece drive shaft robbing me............................ Attached Thumbnails

10-06-2023, 09:37 AM	#2
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 656 Likes: 82 Liked 373 Times in 129 Posts	Re: 1979 C-10 Shop/Race Truck Build So we headed for Kearney Nebraska 2130 feet elevation 4300 DA with bad humidity and ran 12.80 @ 105 MPH but still a horrible 1.82 60 foot, still in the back of my mind a not so quick stocker truck runs 1.77 60 in Denver running 13.8s? I've got something going on here................... 1320/105 = 12.57 getting robbed Anything that can be done to hit the tires harder at this point only responds with a drastic reduction in ET-more to come. Last edited by HP HUNTER; 10-06-2023 at 10:00 AM.

10-06-2023, 09:45 AM	#3
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 656 Likes: 82 Liked 373 Times in 129 Posts	Re: 1979 C-10 Shop/Race Truck Build Keep in mind at this point this truck has been running about 6 1/2 years from the time it was built to the 12.80 @ Kearney and has about 20,000 miles on it, mostly with the 5.13 gear, we drove it a lot, and the late Harold Bettes felt pretty comfortable over in the passenger seat going lunch!

10-06-2023, 10:20 AM	#4
Tim H VIP Member Join Date: Jan 2007 Posts: 1,043 Likes: 1,084 Liked 482 Times in 159 Posts	Re: 1979 C-10 Shop/Race Truck Build Just how much time was spent porting the heads ? I realize that is something you have a lot of experience in.

10-10-2023, 10:01 AM	#6
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 656 Likes: 82 Liked 373 Times in 129 Posts	Re: 1979 C-10 Shop/Race Truck Build So we moved to Texas, I ran the truck @ 450 feet elevation, 2000 DA with the 327 which resulted in a 12.13 @ 107+ with a 1.63 60. at this point I knew the truck would never run 11s in the heat so I decided to build a 350 hoping this would put it into the 11s. Notice my ET @ Kearney 2130 feet 12.80 dropped to 12.13/7.63 @ Little River 450 feet. My drive line losses were showing what every bit of extra power was worth. 1320/107.5 = 12.27 much better at this point, but far from done.......... Last edited by HP HUNTER; 10-10-2023 at 10:07 AM.

10-10-2023, 07:08 PM	#7
Kirk Morgan Member Join Date: Jan 2009 Posts: 230 Likes: 1 Liked 81 Times in 45 Posts	Re: 1979 C-10 Shop/Race Truck Build Are you doing dyno work in Texas? Little River has a lot of history.