Quote:
Originally Posted by FastPlastic
Ok, so it's starting to warm up and I've been planning on making one of these. One question I have is would ABS plastic be safe to use? The melting point is much lower then nylon 221F as opposed to the nylons 420F. I ask because I have a bunch of left over 3/8" sheets that would work great for this if it won't melt.
I know engine temp in the Jeep sits around 209F. What kind of temps does the throttle body see?
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Sorry to dig up an old thread, but the spacer on my 96 old 4.0 ZJ made a slightly noticeable increase in horsepower (mostly getting on the highway or up hills). I also gained 1.2mpg lifetime (roughly 140k) after the installation over the baseline of the previous 65k. Mine was made out of aluminum, I took the gasket to a local machine shop and told them to make me one a little over 1" thick (no hood clearance beyond that). I needed longer bolts for the TB and the throttle cables, but I got those from a fellow jeeper.
After my success, a buddy with a 92 XJ made one out of wood, he saw very limited gains (and drove like an ass). He hasn't had any problems with burning in the last five years.
And I believe the intake manifold gets much hotter than 209*, simply because the exhaust header is directly underneath it.