Engine & Internal Chat about beefing up your Blazer's engine insides here.

Want more horsepower

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Old 02-17-2011, 04:43 PM
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Post Want more horsepower

This is my first thread. Just wondering how to crank out a few more horsepower from my 4.3l. No modifications on it YET...
 
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Old 02-17-2011, 05:41 PM
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CAI, free flowing exhaust/high flow cat and a tune would be a good place to start. Welcome to the forum.
 
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Old 02-17-2011, 07:39 PM
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it all depends on how deep you want to get into it.

all of the parts mentioned above will add a bit to the 4-3. running full synthetic oils will help reduce parasitic drag, which will free up a little more.

or you can go ***** in, and build an engine from the pan up. while your early W-code can take more boost (if you decide to go that route) the later designed heads flow better (so i've been told).

it all depends on how deep of a pocket you have.
 
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Old 02-17-2011, 08:41 PM
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V8 swap no doubt.
 
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Old 02-17-2011, 10:55 PM
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but why would you swap in a V8 with the same dispalcement?
 
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Old 02-18-2011, 05:43 AM
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I thought about CAI, but it seems like they don't make that big of a difference.
 
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Old 02-18-2011, 09:26 AM
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Originally Posted by nswoodsman View Post
I thought about CAI, but it seems like they don't make that big of a difference.
The little gains add up. There aren't many things that will give you a serious HP gain. A turbo or supercharger will, but they're fairly expensive. Actually, speed itself is expensive. Unless you want to shell out some serious coin, do the simple stuff first.
 
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Old 02-18-2011, 10:15 AM
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supercharge it, I believe you can make the ones from buick and pontiac v6's to bolt up to a 4.3 not 100% sure about that... also you could regear you truck to 4.10's, that'll make it "quicker", your top speed will be reduced but blazers shouldn't go over 100 mph anyway
 

Last edited by Benedict1337; 02-18-2011 at 10:22 AM.
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Old 02-18-2011, 11:10 AM
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Originally Posted by old skool luvr View Post
but why would you swap in a V8 with the same dispalcement?
Who said anything about a V8 with the same displacement?

nswoodsman, you will not gain a whole lot with basic bolt ons out of a 4.3. I think a tune from PCMforless or another reputable tuner is the best bang for the buck.
 
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Old 02-18-2011, 11:13 AM
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Originally Posted by Benedict1337 View Post
supercharge it, I believe you can make the ones from buick and pontiac v6's to bolt up to a 4.3 not 100% sure about that... also you could regear you truck to 4.10's, that'll make it "quicker", your top speed will be reduced but blazers shouldn't go over 100 mph anyway
you can't bolt a 3800 s/c to a 4.3, the throttle body would be stuffed into the firewall.
 

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