How much power are you making with your I6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mxracer202 · 12-21-2010, 02:33 PM

Ok lets here what you got and what your making for power!! Pics! and what your using!!

I would start but mines stock and waiting to be put in.

oldblue1968chevy · 12-21-2010, 03:07 PM

cool thread i'll bump it, I know a few people have some hopped up ones!

oldblue1968chevy · 12-21-2010, 03:08 PM

stock 235

Mxracer202 · 12-21-2010, 03:28 PM

cant wait to get mine upgradddeedd and makin some power but i need to learn to save money better lol

geezer#99 · 12-21-2010, 03:37 PM

Here's mine. Offy intake and holley 350 2 bbl. Langdon's headers and dual pipes out the back. Offy valve cover and an HEI. Stock 140 horses. Now it's gotta be twice that. At least. Ya right. Not likely. LOL!!!

oldblue1968chevy · 12-21-2010, 04:19 PM

ha those look awesome lol

70 shorty · 12-21-2010, 04:22 PM

Not much stock on this 250. Unfortunately, my uncle did the engine more than 10 years ago and doesn't remember exactly what he put in it. I know it's bored at least 30 over, a slightly bigger cam, clifford intake, Holley 390, ported head, header into dual exhausts, and HEI. I have no idea what HP it's making, but I sure would love to find someone who can really tune it right. It's never run as strong as I know it can, but it still runs strong enough.

Mark B · 12-21-2010, 05:38 PM

I have two and have no idea about either one!
Mark

oldblue1968chevy · 12-21-2010, 05:48 PM

that is a really good before/after pic

54blackhornet · 12-21-2010, 07:03 PM

I built a 292 to replace the 250 in my 68 GMC 1500. It has so much more torque than the stock engine that it broke both rubber motor mounts.

sixtyeightchevykid · 12-21-2010, 10:47 PM

i dont want to hijack, but i think it would also be nice to see what everyone is doing with the spark plug wires, its kinda an odd thing but im kinda tired of mine being just hanging there and floppy. to me it really dresses up an engine if the plug wires arent floppy...

Sonicman · 12-22-2010, 01:36 AM

Quote:

Originally Posted by sixtyeightchevykid

i dont want to hijack, but i think it would also be nice to see what everyone is doing with the spark plug wires, its kinda an odd thing but im kinda tired of mine being just hanging there and floppy. to me it really dresses up an engine if the plug wires arent floppy...

I totally agree, mine look like crap.

Mxracer202 · 12-22-2010, 01:55 PM

Quote:

Originally Posted by sixtyeightchevykid

i dont want to hijack, but i think it would also be nice to see what everyone is doing with the spark plug wires, its kinda an odd thing but im kinda tired of mine being just hanging there and floppy. to me it really dresses up an engine if the plug wires arent floppy...

True anyone got a link for some good ones

68Stepbed · 12-22-2010, 03:47 PM

Quote:

Originally Posted by sixtyeightchevykid

i dont want to hijack, but i think it would also be nice to see what everyone is doing with the spark plug wires, its kinda an odd thing but im kinda tired of mine being just hanging there and floppy. to me it really dresses up an engine if the plug wires arent floppy...

Get you some 1 1/2" tubing, cut it the approx. length of the head, drill holes for each plug wire where it can exit to the plug, have tabs welded to it for mounting, run the wires front to back bringing each wire through the hole to the appropiate plug(be sure to use rubber grommets), install plug boots and be done. This WILL require the use of a custom cut wire kit.

I would look better mounted just below the plugs, with each wire just coming up out of the tube about 1 1/2-2 inches.

I'm in the process of making a similar setup, but for a V8. I can get pics if you need them.

oldblue1968chevy · 12-21-2010, 10:49 PM

I saw a CLEAN I6 sparkplug wire routing awhile back..I wish I saved it for ya sixyeight

Sonicman · 12-22-2010, 01:34 AM

Here's mine.....it's a 250 L6. It has clifford intake and dual shorty headers. It has a 4 barrel eddelbrock carb with electric choke. I have a single flowmaster exhaust dual in single out. The PO had it bored .60 over and the crank has been turned .10. The books say it was 155 HP stock and I know it a bit faster than it was. I like it alot. It has 550 miles on the rebuild and seems to run better every day. Thanks for starting this thread

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brad_man_72 · 12-22-2010, 01:56 PM

kyull67 claims to be making 300hp with his 250, and I believe him! The engine is torn down now waiting for a turbo.

bosco200 · 12-22-2010, 03:24 PM

250 Never been rebuilt Runs like a TANK

oldblue1968chevy · 12-22-2010, 03:53 PM

Im interested in pix matt

Mxracer202 · 12-22-2010, 03:59 PM

x2 on the pics, please

Hubscrub · 12-22-2010, 04:58 PM

heres the last pic of mine in the truck just stock but it ran like a top i beat the heck out of everyone i've owned, just before i tore the truck down i was doing burnouts one after another until the carb started flooding so i decided to tare the truck apart.

You CAN'T beat and inline

70 shorty · 12-22-2010, 06:34 PM

Just some simple wire separators clean up the plug wires a lot.

68Stepbed · 12-23-2010, 09:43 AM

OK here's the pics of what I'm working on. I started with 1" tubing, cut to length, then drilled the holes.(1st pic)

In the second pic, I had a buddy machine a set of plugs to cap the ends off.

3rd and 4th pics, plugs installed.

Last pic is with an 8mm wire run through with a grommet. I drilled 9/16" holes because the NAPA grommets I used were made for a 9/16" hole with a 3/8" opening. I had to use a 3/8" opening because the wire has a tendency to drag and pull the grommet into the tubing. I will be sure to use some kind of lubricant to make the wires slide through the tubing and grommets easier.

All I need to do now is have some mounting tabs made and welded on. They will be mounted through the valve cover mounting holes like most loom setups. The wires will simply just drop down out of the tube to the plug. I plan to do a full write up with photos when completed.

72shortstep · 12-24-2010, 07:28 AM

I'm also looking for some ideas to get some HP out of my 250.... Hubscrub, it kinda looks like you ripped the heart out of that truck with the trail of oil out the front of it, haha.

Hubscrub · 12-24-2010, 09:33 AM

Quote:

Originally Posted by 72shortstep

I'm also looking for some ideas to get some HP out of my 250.... Hubscrub, it kinda looks like you ripped the heart out of that truck with the trail of oil out the front of it, haha.

yea i just drug the trans out on the ground to the front man that thing was greasy

the truck was unmolested since 71 and i think the trans was uncleaned since 71

12-21-2010, 02:33 PM	#1
Mxracer202 Registered User Join Date: Aug 2009 Location: RC, South Dakota. Posts: 164	How much power are you making with your I6 Ok lets here what you got and what your making for power!! Pics! and what your using!! I would start but mines stock and waiting to be put in. __________________ 58 Jeep willys pickup 67 K10 4x4- soon to be trail truck TROUBLE MAKER RACING "If you can't stand BEHIND our troops, please stand in FRONT of them."

12-21-2010, 03:07 PM	#2
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: How much power are you making with your I6 cool thread i'll bump it, I know a few people have some hopped up ones! __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

12-21-2010, 03:08 PM	#3
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: How much power are you making with your I6 stock 235 Attached Images __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

12-21-2010, 03:28 PM	#4
Mxracer202 Registered User Join Date: Aug 2009 Location: RC, South Dakota. Posts: 164	Re: How much power are you making with your I6 cant wait to get mine upgradddeedd and makin some power but i need to learn to save money better lol __________________ 58 Jeep willys pickup 67 K10 4x4- soon to be trail truck TROUBLE MAKER RACING "If you can't stand BEHIND our troops, please stand in FRONT of them."

12-21-2010, 03:37 PM	#5
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,715	Re: How much power are you making with your I6 Here's mine. Offy intake and holley 350 2 bbl. Langdon's headers and dual pipes out the back. Offy valve cover and an HEI. Stock 140 horses. Now it's gotta be twice that. At least. Ya right. Not likely. LOL!!! Attached Images

12-21-2010, 04:19 PM	#6
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: How much power are you making with your I6 ha those look awesome lol __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

12-21-2010, 04:22 PM	#7
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,772	Re: How much power are you making with your I6 Not much stock on this 250. Unfortunately, my uncle did the engine more than 10 years ago and doesn't remember exactly what he put in it. I know it's bored at least 30 over, a slightly bigger cam, clifford intake, Holley 390, ported head, header into dual exhausts, and HEI. I have no idea what HP it's making, but I sure would love to find someone who can really tune it right. It's never run as strong as I know it can, but it still runs strong enough. __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K

12-21-2010, 05:38 PM	#8
Mark B Registered User Join Date: Oct 2005 Location: Ontario, Canada Posts: 145	Re: How much power are you making with your I6 I have two and have no idea about either one! Mark Attached Images

12-21-2010, 05:48 PM	#9
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: How much power are you making with your I6 that is a really good before/after pic __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

12-21-2010, 07:03 PM	#10
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,386	Re: How much power are you making with your I6 I built a 292 to replace the 250 in my 68 GMC 1500. It has so much more torque than the stock engine that it broke both rubber motor mounts.

12-21-2010, 10:47 PM	#11
sixtyeightchevykid Registered User Join Date: Jan 2010 Location: Stillwater, Oklahoma Posts: 194	Re: How much power are you making with your I6 i dont want to hijack, but i think it would also be nice to see what everyone is doing with the spark plug wires, its kinda an odd thing but im kinda tired of mine being just hanging there and floppy. to me it really dresses up an engine if the plug wires arent floppy...

12-21-2010, 10:49 PM	#15
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: How much power are you making with your I6 I saw a CLEAN I6 sparkplug wire routing awhile back..I wish I saved it for ya sixyeight __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

12-22-2010, 01:34 AM	#16
Sonicman Registered User Join Date: Jul 2010 Location: Denton, TX Posts: 155	Re: How much power are you making with your I6 Here's mine.....it's a 250 L6. It has clifford intake and dual shorty headers. It has a 4 barrel eddelbrock carb with electric choke. I have a single flowmaster exhaust dual in single out. The PO had it bored .60 over and the crank has been turned .10. The books say it was 155 HP stock and I know it a bit faster than it was. I like it alot. It has 550 miles on the rebuild and seems to run better every day. Thanks for starting this thread

12-22-2010, 01:56 PM	#17
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: How much power are you making with your I6 kyull67 claims to be making 300hp with his 250, and I believe him! The engine is torn down now waiting for a turbo. __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project,

12-22-2010, 03:24 PM	#18
bosco200 Registered User Join Date: Dec 2009 Location: Ste. Genevieve, MO Posts: 526	Re: How much power are you making with your I6 250 Never been rebuilt Runs like a TANK Attached Images Last edited by bosco200; 12-22-2010 at 03:25 PM.



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12-22-2010, 03:53 PM	#19
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: How much power are you making with your I6 Im interested in pix matt __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

12-22-2010, 03:59 PM	#20
Mxracer202 Registered User Join Date: Aug 2009 Location: RC, South Dakota. Posts: 164	Re: How much power are you making with your I6 x2 on the pics, please __________________ 58 Jeep willys pickup 67 K10 4x4- soon to be trail truck TROUBLE MAKER RACING "If you can't stand BEHIND our troops, please stand in FRONT of them."

12-22-2010, 04:58 PM	#21
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: How much power are you making with your I6 heres the last pic of mine in the truck just stock but it ran like a top i beat the heck out of everyone i've owned, just before i tore the truck down i was doing burnouts one after another until the carb started flooding so i decided to tare the truck apart. You CAN'T beat and inline Attached Images __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14 Last edited by Hubscrub; 12-22-2010 at 04:59 PM.

12-22-2010, 06:34 PM	#22
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,772	Re: How much power are you making with your I6 Just some simple wire separators clean up the plug wires a lot. __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K

12-23-2010, 09:43 AM	#23
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: How much power are you making with your I6 OK here's the pics of what I'm working on. I started with 1" tubing, cut to length, then drilled the holes.(1st pic) In the second pic, I had a buddy machine a set of plugs to cap the ends off. 3rd and 4th pics, plugs installed. Last pic is with an 8mm wire run through with a grommet. I drilled 9/16" holes because the NAPA grommets I used were made for a 9/16" hole with a 3/8" opening. I had to use a 3/8" opening because the wire has a tendency to drag and pull the grommet into the tubing. I will be sure to use some kind of lubricant to make the wires slide through the tubing and grommets easier. All I need to do now is have some mounting tabs made and welded on. They will be mounted through the valve cover mounting holes like most loom setups. The wires will simply just drop down out of the tube to the plug. I plan to do a full write up with photos when completed. Attached Images __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

12-24-2010, 07:28 AM	#24
72shortstep lovin' the lowcountry Join Date: Apr 2010 Location: Moncks Corner, SC Posts: 138	Re: How much power are you making with your I6 I'm also looking for some ideas to get some HP out of my 250.... Hubscrub, it kinda looks like you ripped the heart out of that truck with the trail of oil out the front of it, haha. __________________ Chris 29461 72 SWB stepside 71 SWB stepside DRIVE IT LIKE YOU STOLE IT!

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