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few questions about my new 78 corvette

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  #11  
Old 09-19-2008, 05:51 PM
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Default RE: few questions about my new 78 corvette

thanks for the advice, what ideas do you all have on cranking more hp out of these low power motors?
 
  #12  
Old 09-19-2008, 11:35 PM
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Default RE: few questions about my new 78 corvette

Depends upon your budget. First things that come to mind are cam, intake, and headers/exhaust.
 
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Old 09-20-2008, 01:22 AM
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Default RE: few questions about my new 78 corvette

Hi again, if you want a little more power you might want to start by re-curving the distributor, that's cheep and effective. You'll need to buy or borrow a timing light and get the "Accel" kit from you auto parst store. If you don't know what I mean just ask, someone will guide you thru it.
Just wondering, what did you find out about the stumble when you step on it? PG.
 
  #14  
Old 09-20-2008, 12:04 PM
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Default RE: few questions about my new 78 corvette

Depending on how stock you want your car to look some simple changes can make a lot of performance improvement.
A K&N AIR FILTER the one that lets the air through the top is good for 5-10hp the manufactures says.
I have one one my Camaro and it works real good. I plan to put one on my Vet soon
Getting rid of backpressure is another way of recouping lost HP.
there are many good exaust systems on the market.
A good Comp Cam and good matching springs can up you as much as 50-60-HP
Good luck,
Schoon
 
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Old 09-20-2008, 01:29 PM
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Default RE: few questions about my new 78 corvette

I have yet to find out whats causing the drop in rms when i step on it, i have been trying to sell my 4cly race car so havent had time to look in to it, i think i will deff. get a k&n air filter, as for exhuast i think i might look into hooker headers, and straight pipe into a high flow exhuast and move the pipes out the side, im not much of a mech so im not sure what the dist. deal is and for the cam i will prob have to get a pro to do that. thanks again for all your help, once i look into the drop in rpms ill let you all know.
 
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Old 09-20-2008, 09:52 PM
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Default RE: few questions about my new 78 corvette

You can recurve your distributor w/ a timing lite and the kit PG mentioned. Basically the stock curve doesn't let all of the mechanical advance in 'til around 4,000 rpm. You can pick up some zip by lowering this to around 2,500.

Re: Hooker headers - Are you talking about the side-mount style commonly referred to as "nest of snakes"?
 
  #17  
Old 09-22-2008, 05:22 AM
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Default RE: few questions about my new 78 corvette

ORIGINAL: danmf05

everything is stock for the car, so i would guess that it still has the quadrajet carb on it, i just got a repair manual so i will have to check out the accelerator pump, would it be a cracked vacuum line or something like that? thanks for the help so far
All correct replies; The pump plunger will wear or even crack from dryness over time and won't seal in it's cylinder order to get a good shot of fuel to the venturies. The pump gives a smooth transition between the low speed fuel circuit and the high speed fuelcircuit giving that shot of fuel, filling the gap, where you'd otherwise get a bog from a lean (no) fuel situation.
 
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