Replacing hard plastic vacuum lines

[chilort]

The car is an '86 Daytona with the hard plastic vacuum lines. I've been having some issues with vacuum leaks. I've got the problems fixed for the most part but am tired of the brittle nature of the lines.

What have you all used? Did you go with small hose? Any problems with small hose sucking shut when really warm?

[turbovanman²]

I use the hard lines that go to the engine from the fender then redo at the engine. Just use vacuum line and pcv hose, tee's to fix the hard line. I also have a new roll of hardline I use for some sections. Vacuum blocks also help clean up the mess.

[mobyrich]

Go to www.roadraceengineering.com and then to the larson kit. Use it on my R/T with no problems what-so-ever. Check out the whole site.

[cordes]

Go to www.roadraceengineering.com and then to the larson kit. Use it on my R/T with no problems what-so-ever. Check out the whole site.

Some good advise from the site.

Tuning Tip: Red is a good color for all around performance, however with a big turbo blue gets upwards of 10 hp, unless you have stock cams, then only 5 hp. Purple is best for bottom end power, mix with red for excellent mid-range. For NT cars, shift all recommendations one hue towards a warmer color. Yellow hose should only be used on high compression NTs or turbo cars with welded differentials. Proper Sticker Tuning can be a successful work around for any of these concerns. ;-P

[turbovanman²]

^^^^^^^^Holy sh*t, that is funny stuff,

[135sohc]

I've replaced some of mine with sections of brakeline. slow progress but should never need to be replaced ever again once its done

[JDAWG]

I just use vac line. When I pulled the head off my VNT I grabbed all the vac line and just ripped them all out. Then ran my own new ones.

[chilort]

Since it looked like people were just using standard rubber vacuum line for the most part I ran to AZ and bought 20 feet. I also bought 10 feet of 1/4" for the line going to the vapor canister. The line going to the vapor canister had been patched once and that may have been where my vacuum leak was coming from. I also found the line from the fuel tank to the vapor canister was disconnected. I wonder how long it has been like that. The nipple on the vapor canister looked clean-ish, so it hasn't been too long.

I replaced the funky black distribution block with a home made piece a few weeks ago. I mounted it to the fire wall. It isn't perfect but it did really help to clean things up.

I guess we'll see how this works and if my random miss clears up.

.... I've got some brake line and if I were to start from scratch ......

[JDAWG]

never had a problem with the standard rubber line from autoparts

[GLHNSLHT2]

I like my Polyurethane lines.

[amoparacer]

I use 1/8 inch copper lines with double flair if you are in a heavy smog insp state like california paint them black before installing the rubber lines to the juntions. Then they still look like the black plastic ones. The smog inspection stations here are a pain.

[135sohc]

I use 1/8 inch copper lines with double flair if you are in a heavy smog insp state like california paint them black before installing the rubber lines to the juntions. Then they still look like the black plastic ones. The smog inspection stations here are a pain.

and you would think since those are practically going to never going to melt, leak or otherwise potentially go bad causing more pollution. that they wouldnt give a crap.

[JDAWG]

uhh?.

[135sohc]

uhh?.

[JDAWG]

I use 1/8 inch copper lines with double flair if you are in a heavy smog insp state like california paint them black before installing the rubber lines to the juntions. Then they still look like the black plastic ones. The smog inspection stations here are a pain.

bet that looks green after a month, pics?

[SoCalCSX]

I like DOT 1/8" airline for the little spaghetti lines. You can get 50' of that stuff for like $8.

[tryingbe]

never had a problem with the standard rubber line from autoparts

+1, at 15PSI

[Polygon]

I got a black silicone line kit from FWD Performance and a vac block. I bought the fittings from EVCO. Here's what I ended up with.







Here are the old lines.



I'm also just going to pull the large line going to the evap. I don't know why i left that in. Kind of pointless since I removed everything else related to it.

[turbovanman²]

I personally like having an Evap setup, avoids the gas tank building up fumes and also filling up the engine bay,