The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1969 - 1972 Blazers and Jimmys Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-29-2016, 12:02 AM   #1
Cjc6ftk5blazer
Registered User
 
Join Date: Apr 2016
Location: Littleton, Colorado
Posts: 3
More power

I'm Looking to get more HP out of my 72 k5 Blazer? What are some Suggestions without breaking the bank. It's a 350 with turbo 350, motor was rebuilt but don't know when. It is completely stock, looking to get some more HP out of it without rebuilding motor. Looking for suggestions please. I am a novice mechanic but looking to learn the craft with my new purchase.
Cjc6ftk5blazer is offline   Reply With Quote
Old 04-29-2016, 07:54 AM   #2
Tomo
Senior Member
 
Join Date: Apr 2016
Location: Indiana
Posts: 211
Re: More power

If you are not worried about retaining the stock appearance - headers and a better flowing intake could be a good place to start.

Could also get some power from a tune up if you timing is off and you ignition system is weak.

Just throwing out ideas - I am no expert either.
Tomo is offline   Reply With Quote
Old 04-29-2016, 10:59 AM   #3
fun in dirt
Registered User
 
fun in dirt's Avatar
 
Join Date: Jan 2007
Location: Mississippi
Posts: 2,118
Re: More power

Aluminum intake & new carb (or rebuild carb you have)
__________________
'72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432
'85 K30 "Big Nassy"
'06 3500 Duramax ...tow truck
'06 Silverado SS...DD
'06 C1500 WT...DD
'07 Classic C1500 WT...DD
Built & sold cause can't keep 'em all:
'72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190
'55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938
'69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541
'86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619
fun in dirt is offline   Reply With Quote
Old 04-29-2016, 11:29 AM   #4
Blazerowner
Senior Member
 
Blazerowner's Avatar
 
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 1,933
Re: More power

A cam can add some good power. I put exhaust, aluminum intake, carb and cam on a 350 in my Chevelle years ago. The car wouldn't even spin the tires before and would smoke them no problem after. I think I spent about 800-1000 for the parts and did the work myself to install them. Make sure the transmission can handle it.
__________________
Kirk
72 Blazer CST 4wd highlander
66 Nova
Blazerowner is offline   Reply With Quote
Old 04-29-2016, 12:08 PM   #5
hemi43
Registered User
 
hemi43's Avatar
 
Join Date: Mar 2015
Location: Ontario Canada
Posts: 1,501
Re: More power

An engine is just a big air pump, so anything you can do to make it breather better will improve power. Like others have said, intake, headers etc.. Better heads and cam would be my choice, as well as a taller gear will help. Just make sure everything is matched to work together like tire size, gear ratio, converter and engine. Too many times I've seen Guys put huge carbs and single plane intakes on trucks with low ratio gearing that the truck actually loses performance.
hemi43 is offline   Reply With Quote
Old 04-29-2016, 10:15 PM   #6
tjsblazer
Registered User
 
tjsblazer's Avatar
 
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
Re: More power

My $0.02.

I'd first ensure your engine timing is optimal and then a carb tune. Little to no investment to maximize what you already have. Do that before you change anything. Depending on from where you're starting you may be pleasantly surprised.

Then gearing and tire size can make a difference if something isn't matched well. You didn't give current specs.

Lastly, if the above isn't enough you need to make changes to your engine. Just remember that this is almost a 5000lb truck. Horsepower doesn't mean much. Max horsepower is developed at a high rpm that a truck like this will rarely be driven in. You want to build to maximize torque in your typical rpm range. Likely shoot for peak torque under 4000 rpm.
And as Hemi mentioned, all components need to be chosen so as to work together to achieve your goal. Swapping parts that don't compliment one another is a waste of money.

Good luck.
__________________
Jeff.

'72 Blazer K5

"Camshaft opinions are like belly buttons; everyone has one and no two are alike"

My Blazer Build:
http://67-72chevytrucks.com/vboard/s...d.php?t=626752

My Engine Build:
http://67-72chevytrucks.com/vboard/s...d.php?t=637336
tjsblazer is offline   Reply With Quote
Old 04-29-2016, 10:17 PM   #7
tjsblazer
Registered User
 
tjsblazer's Avatar
 
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
Re: More power

Oh yeah. Welcome to the forum and post some pics of your rig. Everyone loves to see them.
__________________
Jeff.

'72 Blazer K5

"Camshaft opinions are like belly buttons; everyone has one and no two are alike"

My Blazer Build:
http://67-72chevytrucks.com/vboard/s...d.php?t=626752

My Engine Build:
http://67-72chevytrucks.com/vboard/s...d.php?t=637336
tjsblazer is offline   Reply With Quote
Old 05-01-2016, 08:56 PM   #8
D.PASSMORE
One of the First
 
D.PASSMORE's Avatar
 
Join Date: Jan 2000
Location: St. Augustine,FL.
Posts: 4,055
Re: More power

First make sure you bottom end can handle improvements. But on my DD, rebuilt bottom end stock, I went with a BASIC RV cam from comp cam, edelbrock performer intake, 72cc world heads and 2.5 straight dump exhaust manifold, Dual Borla exhaust. Had to adjust the stock q-Jet with different jets/rods. I have a manual transmission with 3.73 gears. Not sure what HP rating, but has good bottom end and quits making power around 4500 rpm. But still pushing at 5k. It's fun to drive.
__________________
DAVID PASSMORE
ST AUGUSTINE ,FL
ZIP 32084

'71 SWB K/10 CUSTOM DELUXE (Chili)
'72 BLAZER K/5 Muscle Truck (Mule)
'72 LWB K/20 CHEYENNE (Blackie)
D.PASSMORE is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:59 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com