SAI mod semi-delete

[kcabpilot]

I'm in the middle of an engine swap going from a 4 liter to a 4.6 on my D2 and I'm looking at this stainless SAI manifold thing that is crammed along the back of the engine against the firewall and causes all sorts of challenges and then it just winds up with this cheesy plastic hose that plugs into the pump. I'm just wondering why the fuck I need that stainless steel piping? Why can't I just run some hoses to the valves?

Has no one thought of this yet? Seems like it would simplify things an awful lot.

 

[jymmiejamz]

Has no one thought of this yet? Seems like it would simplify things an awful lot.

What is the problem you are trying to fix? No one has thought of it because there is nothing wrong with the factory setup. The pipe can be removed with the plenum in place.

 

[ezzzzzzz]

Heat. If the piping were anything but SS it would probably melt (plastic/rubber) or corrode to the point of failure (any other ferrous metal). In the old days a used copper tubing to feed exhaust from Doug Thorley headers through the intake manifold on my Datsun pickup truck before coolant was used. That could take the heat and not corrode.

 

[kcabpilot]

I don't think heat is an issue. At one end there is a plastic tube from the SAI pump to the piping, at the other two ends are short rubber hoses to the valves. I'm not talking about the manifolds that go to the heads, just the splitter pipe that runs along the back over the coil packs.

Maybe there isn't a problem and there's just a trick to it. I've only done this twice, first time when I did the heads about five years ago. Seems like I'm always having a tough time wrestling that thing in and out over all the wire harnesses and what not but yea, now that I think about it, it's not something you have to deal with normally or very often. I guess I'll just shelve that idea

 

[pdxrovermech]

i see no reason why you couldnt use regular hose other than the fact that it would look ridiculous.

 

[KyleT]

I would use hi temp rubber or silicon hose.

 

[ezzzzzzz]

misunderstanding...

 

[kcabpilot]

No problem, I've dismissed the idea anyway. By the time I got hoses and a splitter and clamps and figured out the routing and supports I could already have the original pipes mounted back in there and be done with it. Jimmy is right - solution looking for a problem.

 

[jymmiejamz]

I can see your frustration in removing it, but let's be honest, how often are you removing it?