91chevyrs350

I know its not a camaro, but i have a 1964 chevy c10 with a 350, stock.. just aluminum intake and carb. Hard to explain what it does but basically when i get down into the pedal i have like a hiccup so i have to ease into it most of the time. unless im already higher up in rpms and then hit it it wont hiccup out of carb.. and the other thing is around 3800 rpm the engine does like a hiccuping or poppin that sounds like its coming out of carb.. what could be doin this? it always has. with new plugs and wires, rotor button etc.. thanks..

DT1987RS

I would start with a compression test it almost sonds like an intake valve or seat problem check compression on all cylinders if you come across a weak cyl. then you will want to do a leak down test to find where the problem is, in. valve, ex. valve, rings. If that is not a problem check your ignition and carb out maybe defective power valve.

johnfwz28

hey dt1987rs how does one go about checking compression. how can you tell if your making 14 to 1 compression?

DT1987RS

The most acurate way is to do the math. You will need to know some facts about your combination such as actual bore dia., stroke, deck ht., piston volume + or - and your combustion chamber volume. Then it goes into a formula. If you are trying to calculate it by simply doing a compression test well that is pretty tough because camshaft has a lot to do with actual pumping compression because you could advance the cam and get a higher pumping compression or retard it and get a lower compression ratio while none of this affects your actual static compression explained at the top of the paragraph. If you need help figuring your comp. shoot me the info.

johnfwz28

well heres the delemma, i bought a 83 camaro with a 383 stroker engine. the car came already set up for the track. its been back-halved and tubbed. it have what i believe to be a holley 650 or 700 carb. i ask a friend who races about putting a larger carb on it and would it wake the engine up more. he said i would need to know what kind of compression ratio i'm making,what kind of cam is in it, etc. the promblem is that i have none of that info. i actually bought the car from a pawn shop. the only info the guy gave me was "don't use any fuel under 114 octaine" and "be careful in this car because it's not a toy and it's fast" so how can i find out all of the info? have it dynoed?

Str8upChevy

To the OP with the truck, you might also want to put a timing light on it and make sure it's not running a little retarded. If it's retarded too much it will pop through the carb. If you don't have a timing light just advance the distibutor a little (counter clockwise) and see if that stops the popping.

On the 383 stroker, without having any of the engine "Specs" it's going to be difficult to figure out what your true compression ratio is going to be. If it only runs on 114 octane or higher fuel, then the compression is definitely going to be up there. Also, putting it on a dyno isn't going to tell you anything other than how much HP/TQ it's making.

Does the motor run ok? (aside from you thinking it needs a bigger carb) Is the carb a double pumper,.....as in: does it have two metering blocks? If you can get the numbers off it, that should tell you what size it is. You said it's been back-halved,....do you have any pics of it? I'd definitely like to see it if you do.

johnfwz28

Hey Str8upchevy, first let me say thanks for responding. yes the car run ok, but just ok.I have owned the car for about 4 years now. and i've only had it at the track once. but my son and i take it out and play around with it on the street every once in a while(i know thats not a smart thing to do, but we're careful,and its only for a little while). the one time at the track i didnt even drive it. my son did. we were both rookies and didnt know what we were doing. we had too much air in the slicks, and really didnt know how to launch it properly. after a couple of pointers from another racer we got the down the track to run 7.4 in the 8th mile.
the carb thats on the car now, i believe the previous owner pieced together because the bowl has BG on it (Barry Grant?) but the metering blocks(yes double pumper)have Holley on them.
as for the car being "back-halved" i think it is but not really sure just what that means. if no back seat and sheet metal tubs,coil over and ladder bar suspension,big fat Mickey Thompson meats tucked inside the fenders means back-halved then it is.
no new pictures. but there are just a couple on here in another thread. "show your strip/street thirdgens"

Str8upChevy

Hey, no problem,.....I'm always happy to help out a fellow ProStreet/Race car enthusiest.

And yes, I did actually see your car in the Street/Strip thread the other week when I revived it from the archives. That's a very cool looking car you got there. I love those "old school" Centerline Auto Drag wheels you have on it. I'd say at least 60-70% of all my old street rods had the exact same "Satin" finish Centerlines on them. I also like that tilt frontend that's on it. With that pro/stock scoop and the flame job it has, it really makes the car look mean! It's too bad we live so far away from each other......I always like to go out and cruise around with people who have tubbed race cars.