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#1 |
Registered User
Join Date: Aug 2013
Location: Oswego New York
Posts: 25
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More power
I have a 67 c10 with a 250 inline 6 and wanna get as much power out of it as possible and keep it as a daily driver, what are some ways to do it?
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#2 |
Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: More power
Replace it with a 1200 Hp GM L6. Can't get much more out of an inline six!
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#3 |
Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,188
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Re: More power
You might want to go here. http://www.stovebolt.com/ubbthreads/...=393457&page=1 these guys have a lot of knowledge behind the 6's. Be prepared to spend 1.5 to 2 X's as much on a 6 as a small block to attain the same power levels. Not saying it can't be done, you just need a pension for uniqueness.
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#4 |
Registered User
Join Date: Oct 2013
Location: Rt 66 Gallup, NM
Posts: 527
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Re: More power
Are you wanting to keep the I6 or go V8? Will you be working with a tight budget?
One thing I did to my first I6 was to check the throttle linkage. It took a little adjustment because the throttle wasnt opening all the way. Once that was fixed it had a little more acceleration, but wasnt a killer change.
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2005 GMC K2500HD D/A 1993 GMC K1500 2011 Subaru Legacy. 2013 Subaru Outback 1970 C-10 2WD, SWB stepside, 292, TH350, PS, more rust than anything. God is my pilot. ![]() |
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#5 |
Registered User
Join Date: Aug 2013
Location: Oswego New York
Posts: 25
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Re: More power
[QUOTE=zeldman;6527103]Are you wanting to keep the I6 or go V8? Will you be working with a tight budget?
One thing I did to my first I6 was to check the throttle linkage. It took a little adjustment because the throttle wasnt opening all the way. Once that was fixed it had a little more acceleration, but wasnt a killer change.[/QUOTE I wanna keep the I6 and i do have a tight budget and thanks for the tip ill have to do that, just wanna squeeze as much out of it as possible |
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#6 |
Registered User
Join Date: Aug 2013
Location: Oswego New York
Posts: 25
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Re: More power
Thank you for the link will deffently check it out
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#7 |
Registered User
Join Date: Dec 2013
Location: Mustang ok
Posts: 24
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Re: More power
I would take head to local machine shop have it decked and vj'd put a kit in carb and go from there not gonna get much performance gain but itl wake her up a bit and is more labor than ca$h
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#8 |
Registered User
Join Date: Dec 2013
Location: Mustang ok
Posts: 24
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Re: More power
Forgot to mention i would also have machinest check valve spring pressure they become weak and youl lose upper end power
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#9 |
Registered User
Join Date: Dec 2013
Location: Mustang ok
Posts: 24
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Re: More power
Swap ignition to hei good plugs and wires plus a good coil msd ect...
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#10 |
Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
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Re: More power
cam, intake, and header. These are readily available for a 250 if you look for them.
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#11 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: More power
If you can find a 194 6 banger in a junkyard out of a early 60's Chevy II you can put that head on a 250 and bump the compression ratio up from 8 : 1 to a little over 9 : 1. You can usually pick them up dirt cheap, so its cheap HP.
Crower makes a great line of performance cams for these engines that cost around $160.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#12 |
Registered User
Join Date: Dec 2013
Location: Seattle, WA
Posts: 155
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Re: More power
x2... Swaping to HEI should be the first thing you do. You might not notice any power gains but your engine will be much more reliable. Plus its supper easy and relatively cheap.
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1970 GMC K2500 aka MaTeR ![]() 2007 Chevy Silverado 1500HD Classic |
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#13 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: More power
First,runa compression check on the engine.There's not much sense in doing anything else until you know the rings valves and such are good.It's as important that the cyls read even as well as that they have enough compression.
Check prices on 6 cyl performance parts.You will find new ones pricey as stated above.You wont get the performance from the 6 that you will from a stock 350 so if you spend the $$$ to build the 6,you will not get it back.If you build the 6 from the ground up you can get great power from it but it may not be very streetable.Read thru some of the 6 cyl threads and decide how far you want to go.Just remember that "Speed costs money,how fast can you afford to go?"
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#14 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: More power
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#15 |
Registered User
Join Date: Sep 2013
Location: Farmersville, TX
Posts: 238
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Re: More power
^ +1 on Clifford. Throw a good intake, good exhaust, and decent carb on it, and you should be fine. The better question is, how much power do you want?
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Grunt: 1971 C20 Custom Camper. Runs/Drives/Kinda stops. 350Ci, TH350. 4.10:1 D60. Eight Lug LWB is more better. Hell no its not fast! Donkey: 93 Nissan D21, the farm truck. My 1/2 ton SWB. The Indomitable Datsun. 1st BN 3rd MAR. '00-'04 ![]() |
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#16 |
the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: More power
Bump up the compression. Big cam. The heads need extensive porting.
2JZ swap
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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, |
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