Re: snorkel performance effects
Fairly Standard over here (Safari Snorkels) I haven't got a TJ and have no probs on mine CJ7 360 V8, My Co runs a TJ with no probs and so does the other DSRT TJ no probs.
Like swadesbcglobal points out there's a lot more to it than just wacking it on.
I have a dizzy that has compressed air that runs to it, The breathers from the Diffs/Gearbox/Tcase run to the snorkel (in and up (up to create positive pressure). why PP well it to help stop water ingress when you enter cold water (PP can also be plumed to the Dizzy). Plug leads are all siliconed around all the Lead joints and onto the plugs and dizzy.
To test if a Snorkel is fitted properly place a plastic bag over the Snorkel intake, if the Jeep stops you've done it.
If it struggles on or you can hear air entering through a joint try again........
The only thing that is then over looked is the Exhaust mine is low but I keep the revs up, if I stall I don't try and start the engine till I have winched out of the river striped the plugs out and checked for water, pos change oils..
DarkSiderz Race Team