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Post by chevy114270 on Mar 24, 2005 23:57:09 GMT -5
Hello everyone; I am a 1970 Nova guy for the most part. So that is where my expertise lies. However, I have owned since new a 1986 K5 Blazer with a 305. It is time to work on it after years of faithful service. This baby is still stock with 239,000+ on it. It is time to pull the engine and rebuild it. I want to keep the original engine with a quadarajet and update it a little bit. It will be used mostly as daily transportation with occasional use towing a 1970 Nova around. What can be done to get more horsepower or efficiency out of the engine? Depending on how you drive, more horsepower should yield better gas mileage and allow for better towing right? I will not say that money is no object, so lets look at the best way to do it first and money second if you know what I mean. So what should/could be done with the: Original heads? Cam (new one? If so what spec?) Lifters (Would rollers be worth it?) Rockers (Would rollers be worth it?) Pistons (new ones? so what type?) Headers and exhaust? Carb? Other parts? Thanks, Greg www.chevynova.org
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Post by BowtieGuy on Mar 31, 2005 19:13:07 GMT -5
Alot of this depends on the compression ratio it has now. Beeing a 305, you have to stick with 305 heads, but maybe some aftermarket heads that flow better would help. Hydrualic roller cam and lifter will increase efficency but at a high price getting the retro fit kit. In my opinion its worth it though. Full roller rockers will free up some friction aswell. The biggest question is how much money are you willing to spend. But I will be honest with you, the 305 isn't the best engine Chevy has. A 350 can be purchased from your local salvage yard and rebuilt, sometimes cheaper, than the 305 and make more power with same parts. The only ones that would know the difference are the ones you tell or the ones that take the time to look up the numbers.
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Post by Bent on Apr 4, 2005 15:32:26 GMT -5
Or don , He uses the force and can tell what anybody is running lol
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Post by blk81short on Oct 11, 2005 18:15:06 GMT -5
A good strong cam will do alot aswell. I have a crane engerizer cam in my 305 truck. This resulted on a very torquey motor. The only other mod was headers. For a small price you can have a good performing motor for a 305.
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Post by 19_Chevelle_69 on Oct 12, 2005 17:25:26 GMT -5
Or don , He uses the force and can tell what anybody is running lol ROFL...Hey, I resemble that remark! Seriously though, in the end, if you are simply freshening up a 305, I'd say go for it. New valve seals, rings and new gaskets will usually make it good as new. If you are looking for any power increase at all, you are beating a dead horse by doing up a 305. Instead of spending ANY money on hopping up a 305, you could rebuild a bone stock 350 and end up with more power for less money. And as a bonus, the 350 will usually get better fuel economy both with an empty bed, or towing a trailer.
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Post by Pontiac1976 on Oct 15, 2005 21:55:54 GMT -5
Well after rebuilding 305 and 350 I would say that I agree with this
350 has 265 HP 310 TQ the 305has 185 hp 230 tq all most all stock\ .60 over
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 21, 2005 17:11:53 GMT -5
Hey you guys. Reading what you said about the 305 versus the 350 engine. What about the 292. Will I also be throwing good money after a bad idea or can I try some things with this engine to spice it up?
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Post by 19_Chevelle_69 on Nov 21, 2005 19:24:30 GMT -5
IMO you are not going to get much performance out of that old 292. If you are interested in performance, you should at least start with a V8 gas engine.
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Post by Bent on Nov 22, 2005 1:08:50 GMT -5
I'll have to go with Don on this one. i didn't know much about the 292 but it sounds like it is a lost cause. Maybe a v-8 would be good if you can swing it
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 22, 2005 15:15:26 GMT -5
Will definitely lean to the V.8 as soon as Dollar dips against the Rand, then it will be cheaper, but as I currently see it, the Dollar is starting to recover from it's past weaknesses. The rebuilds V8's in SA goes for around R5000 witch is about $755. Witch is not to much in SA terms. I want that power under the hood. What engine will be the best replacement without maybe going to FI, but if worth while I can save up some more. The 350, 400 or 454. I guess you don't need to answer, more are always better If one can afjunky a$$ f@#d it, yes? The engine must be Chev otherwise I'll be a traitor and might then be banned from this TOP SITE!!!
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Post by 19_Chevelle_69 on Nov 22, 2005 19:11:18 GMT -5
A good 350 with an aftermarket FI system would be like night and day for you, and would be great for fuel mileage.
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Terry
Wrencher
Terry's
Posts: 54
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Post by Terry on Nov 23, 2005 2:25:24 GMT -5
Thanks A lot Don, will write that down.
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