Thread: what to add for performance on 267v8

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hi i got a chevy impala with a 267 v8 and was wonder what is the cheapest performance parts and were to buy and will they work on a 267.

JMO, but the most cost effective buy would be a nice 350 to replace the 267 with. Not enough potential in the 267's to justify the expense. But, like I say, that's JMO.

I had a 267 in an 81 Grand Prix a few years ago. I put a Q-jet on it, headers, full 2-1/4 dual exhaust and a th350 with a shift kit!! It was pretty slow though. Don't expect a miracle! Couple of my friends said it sounded wicked though.... haha.

I would just go with basic bolt ons for now. Stuff you know you'll be able to swap onto a bigger small block.

The 267's do only 1 thing good and that's sound good with a good dual exzaust just as kevd said but, that's due to the short stroke. Rated stock at 115 horsepower, there not much for any kind of bragging rights. They only made 267's from 1979 until 1981. If you pulled a little more compression with it, by shaving the head to increase to 9 to 1 compression ( stock is 8 to 1 or 7 to 1 ), you'd probably see 20 horse maby, other than that, a set of headders and a 4bbl with good intake, would see you around 200 maby, now if you added this up, head shaving/ head rebuild would run 4-500 bucks probably, headders, good 1's are going to run 120 at least, 4bbl carb and manifold, about 400 for them. add that up and you get 1,020 bucks, go find a good pre '86 GMC/ Chevy pickup truck for 4-500 ( 350 powered ) bucks and get, you get about 250-300 horse right there with the pickup engine, put your 267 in the pickup, and sell it for 3-400 bucks. I had a '81 Impala that had been in a wreck, bought it for the motor for 75 bucks, I thought it was a 350 but, I ended up having it hauled off cause it was a useless engine.

all good advice in my opinion.even after adding a mild cam, headers head work, etc. you may have 200 HP. you can have that stock from a solid running junkyard 350,tha add goodies to that & have 275 or more HP

i would be courious what kind of hp one could get out of a 267 if one could squeeze a set of the dart small chamber iron eagles on it and a cam and headers intake etc . just a thought but i wonder if you could get 350 hp out of it . i dont know if the valves would clear on the bore or not.
i would agree though a 350 would be better with the same package
just a thought.

Originally posted by canadianal
i would be courious what kind of hp one could get out of a 267 if one could squeeze a set of the dart small chamber iron eagles on it and a cam and headers intake etc . just a thought but i wonder if you could get 350 hp out of it . i dont know if the valves would clear on the bore or not.
i would agree though a 350 would be better with the same package
just a thought.

It wouldn't do a thing, the chambers on the stock heads are like the smallest chevy used, somthing like 56 CC, the dart heads are like 58 or 60, as the 267 has only like 7 to 1 or 8 to 1 ( I think the impala's had the 7 to 1 comp engines ), it would make it lower, hurting it. shaving the stock heads would do more. 350 is feasable with a blower, and all other goodies so about 3k of work, to make somthing that could be done with 1k and an engine swap.

well you learn something every day i thought that the iron eagle heads were smaller than that. yeah it wouldnt help much if you couldnt get the compression up.
that what i get for typin before i know whats up.
thanks matt.