Well one day the carb went bad and I had to change
it. It took me and my friend Bryon 4 hours to change the carb on
the Chevette. I replaced the heat grid in under the carb with a plain
open gasket, and noticed a noticeable HP gain. Ever since that day
I did little by little to make the cheap little car go faster. Here
are all the things I did that boosted my HP and pissed allot of people
off driving these jap traps. With the fart can exhausts and the 8.34
HP stickers all over them.
Mod #1. Replace the heat grid under the
carb with an open gasket. Price is around $5
Mod #2. Ditch the smog pump. Price
of that is the cost of the shorter fan belt.
Mod #3. Ditch the belt driven fan and replace
with an electric fan. Price of used fan is around $10
Mod #4. Ditch the mechanical fuel pump
and replace with electric pump. Price is around $40
Mod #5. Cut off the cat and replace with
straight pipe. Price is the cost of the pipe.
Mod #6. Replace single outlet exhaust manifold
with one from an h.o. Dual outlet manifold. price is around $12
Mod #7. Have an exhaust shop bend you all
new 2 inch exhaust from straight pipe back, and replace old muffler with
a new turbo muffler. Cost is around $80 if you install yourself.
Mod #8. Drill holes in air cleaner lid,
to increase air flow to the carb.
Mod #9. Install an older style head, they
have better air flow, you can smoothen up the intake and exhaust ports
also. Cost of this mod will be the cost of a head from junk yard,
and a head gasket.
Mod #10. Find yourself an older style carb,
without all the wires and junk. $20 at a local junk yard.
With all these modifications, you will notice a big difference, and you will have a pretty snappy Chevette. I did all these over a period of 2 years. Rome wasn't built in a day. Plus I had an automatic. If it were a stick shift Chevette it would really be snappy. I could do a break stand and burn tires all day. Just ask Dave L, how fast this Chevette is. I know it's not a 13 second car, but for a Chevette with just minor work done to it, with no internal engine work, it's quick.
I estimated about a 15-20 HP gain with all the mods.
Here's a picture of holes drilled in the air cleaner
lid. I did
this to the 86, it sounded good and gave me a few horses.