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Author Topic: Homemade Headers  (Read 116365 times)

Offline werewolfx13

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Re: Homemade Headers
« Reply #120 on: January 13, 2008, 06:04:04 pm »
Nice, good to see all that patience has paid off. Do you mark the increased economy more to the headers or to fixing that fuel line?
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Chris
'83 Chevy c10 Silverado SWB
'76 Chevy k20 LWB 6.5'x8' Flatbed
“I know that you believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant.”

Offline 123 pugsy

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Re: Homemade Headers
« Reply #121 on: January 13, 2008, 06:13:46 pm »
I'd say more to the headers and the dual cats/exhaust. I discovered that I had one 5 liter cat on the single exhaust. I believe that was causing the most choking in the exhaust system.

When I cut off the piece of  pinched return line , I discovered that it wasn't closed all the way as it appeared. I could easily blow thru it.
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Pugsy
76 C10 LWB
TPI 350

Offline JJSZABO

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Re: Homemade Headers
« Reply #122 on: January 13, 2008, 07:00:42 pm »
Congratulations pugsy

20MPG  Not toooo shabby :)
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Jeff

86 Chevy C-10
350, TH400
Ex father and son project (son lost interest)

Son regained interest when truck was almost completed

Offline 85MudMonster

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Re: Homemade Headers
« Reply #123 on: January 15, 2008, 09:27:08 am »
20 MPG!!!  :o :o

Oh, man! I wish I could get that....I'm jealous now....
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Dan

85 Chevy K10 - 408 BBC from a 71 Chevelle SS, TH350, NP208, 33" Mastercraft Courser M/T

Offline VileZambonie

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Re: Homemade Headers
« Reply #124 on: January 15, 2008, 10:08:14 am »
Great! Did you get your headers coated?
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Offline 123 pugsy

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Re: Homemade Headers
« Reply #125 on: January 15, 2008, 04:45:22 pm »
Quote from: VileZambonie on January 15, 2008, 10:08:14 am
Great! Did you get your headers coated?

Yessir.

Dyno tommorow. ;D
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Pugsy
76 C10 LWB
TPI 350

Offline Captkaos

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Re: Homemade Headers
« Reply #126 on: January 15, 2008, 05:34:39 pm »
Those looks great.  Definitely post you dyno numbers!
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Offline JJSZABO

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Re: Homemade Headers
« Reply #127 on: January 15, 2008, 06:32:07 pm »
WOW - purdy!! :D

Can't wait for the dyno numbers.
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Jeff

86 Chevy C-10
350, TH400
Ex father and son project (son lost interest)

Son regained interest when truck was almost completed

Offline 123 pugsy

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Re: Homemade Headers
« Reply #128 on: January 16, 2008, 02:34:21 pm »
Thanks guys.

Good thing I originally thought to go to the dyno. I went there originally with167.73 max HP.
Today with new air breather and headers I have 212.99 rear wheel HP.
Net improvement:45.26 HP

Original run for torque:245.72 ft/lbs torque.
Today with breather and headers : 292.52 ft/lbs torque.
Net improvement: 46.8 ft/lbs torque.

Headers only improvement: 23.09 HP
                                       26.65 ft/lbs torque

Also improved is the air/fuel ratio. You can see it running nicely beside the dashed line at the bottom.
HP and torque are not huge but it smokes the tires , takes off great and is getting good milage.
PERFECT! ;)



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Pugsy
76 C10 LWB
TPI 350

Offline Captkaos

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Re: Homemade Headers
« Reply #129 on: January 16, 2008, 02:56:30 pm »
MUCH better!!!
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Offline VileZambonie

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Re: Homemade Headers
« Reply #130 on: January 16, 2008, 05:23:14 pm »
Nice! So what did they charge you to dyno it?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline jonkmbll89

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Re: Homemade Headers
« Reply #131 on: January 16, 2008, 07:41:13 pm »
Your headers look good under the hood.
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Offline 123 pugsy

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Re: Homemade Headers
« Reply #132 on: January 16, 2008, 08:05:38 pm »
Quote from: VileZambonie on January 16, 2008, 05:23:14 pm
Nice! So what did they charge you to dyno it?

$100. First time was $140. I think I made a good investment with this. They pegged the problems right on the head. I'll save that in fuel in not much time at all.


Quote from: jonkmbll89 on January 16, 2008, 07:41:13 pm
Your headers look good under the hood.


Thanks. The fella at the dyno said equal lengths weren't too important but I think its best to do things properly. She runs real good so I think every little bit helps.

I do have a little bit of a rough idle still and in drive at a stop. Dyno dude said probably because of the cam??? Don't know if I'll bite on this one.
Any comments on this one guys?

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Pugsy
76 C10 LWB
TPI 350

Offline 85MudMonster

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Re: Homemade Headers
« Reply #133 on: January 16, 2008, 10:26:56 pm »
WOW!!! Some nice gains. good work. ;)
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Dan

85 Chevy K10 - 408 BBC from a 71 Chevelle SS, TH350, NP208, 33" Mastercraft Courser M/T

Offline Redneckchevy

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Re: Homemade Headers
« Reply #134 on: January 16, 2008, 10:31:09 pm »
Sweet job! im impressed with the horse power gain !
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