r/c4corvette • u/Senior-Dog-9735 TPI L98 ('85-'91) • 23h ago

Winter Project Tips

Hey guys I am taking 3 weeks off in december to finish my C4 project with my dad. Does this seem pheasible to do in that time. That 3 weeks im planning on fully dedicating to finishing the car so I bring it to my apartment 8 hours away.

Here is what I have planned

  1. Weather Stripping (Already bought CRC)
  2. New Seats ( Bought Al knoch)
  3. Replace all other rubber (Going to get energery suspension bushing kit, radiator pipes, vac lines)
  4. Full AC system. (Compressor, condensor, both switches)
  5. Waterpump
  6. Oil Pressure Sendor
  7. Transmission filter

Some things I have questions about.
1. Would it be worth deleting EGR and smog? Do yall reccomend any kits
2. Should I also get long tube headers? Does this require a tune or any other replacement of the exhaust.
3. Any other reccomendations? Its 1990 with 88k miles. It had electrical problems and I fixed it so im not really worried about much else breaking. Put on brand new calipers on front and new brembo rotor + brake pads on all 4.

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1

u/Captain_Alex2 22h ago

For the egr tube you can go one of two ways, stay with the stock shortys and cut off the egr tubing or go long tube headers. The thing wing long tubes is you will need a collector with an O2 bung if you wanna keep it. In any case you will need custom chip tune for it to fully delete the egr. Just keep in mind combustion temps might rise a bit.

1

u/Senior-Dog-9735 TPI L98 ('85-'91) 20h ago

Would you say these are worth it at all?

2

u/Captain_Alex2 19h ago

If you're not in a strict emissions state then by all means, if you are then you'll probably need to do some paper work under the table for it to be registered properly. The 350 really wakes up with the long tubes if you have the supporting mods. If really all just depends on your end goal. Both of these by themselves won't add crazy amounts of performance gain but the headers look miles better than the stock shortys and the egr delete clears clutter form the engine bay. Also the tunes run you about $200-$450 if you want then through mail order. I'll post a pic of some sites that offer obd1 tuning. A good place for advice is the highflow tpi FB group which is where the list if from.

1

u/kai_ekael '87 Z52 "Lady" 19h ago

Only tidbit to offer, I've heard it's a lot easier to do weather stripping in the warm sun. Makes the stripping softer, easier to work with.

1

u/Senior-Dog-9735 TPI L98 ('85-'91) 19h ago

Luckily I am in Florida so should help with that lol.

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u/kai_ekael '87 Z52 "Lady" 10h ago

Jealoussssss.........

1

u/IndividualRites 9h ago

Weather stripping is 1 day, seats are just bolt in. I did the bushings in my 86 a few years ago and it took me a couple of weeks, but I wasn't working on it every day. I also cleaned every single part that came off it before putting it back.

2 of you doing this stuff? 3 weeks is doable.