Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: jeep94 on November 30, 2006, 10:17:18 PM

Title: Snorkel Info (again!)
Post by: jeep94 on November 30, 2006, 10:17:18 PM: Does anybody out there have any info on the raised-air-intake as seen on Surrey Off-Road’s ‘Rubicon 1 Cherokee’?

As Christmas is fast approaching, who sells rock sliders out there?

Many thanks, Simon .
Title: Re: Snorkel Info (again!)
Post by: tim_aka_tim on November 30, 2006, 10:23:49 PM: Quote from: "jeep94"
Does anybody out there have any info on the raised-air-intake as seen on Surrey Off-Road’s ‘Rubicon 1 Cherokee’?

That bloody horrible contraption is their own in-house Rokraider snorkel. I'm sure they'd be more than happy to tell you about it and sell you one.
Looks like a bit of vacuum cleaner pipe to me, made in the Blue Peter style. Get the Safari (the Airflow snorkel is better, but Airflow's aren't compatible with ABS cherokees).
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Post by: dtooth on December 02, 2006, 12:33:48 PM: theres a safari one on the bay noww!!

http://cgi.ebay.co.uk/Jeep-Cherokee-Sno ... dZViewItem (http://cgi.ebay.co.uk/Jeep-Cherokee-Snorkel-Safari-4x4-Engineering_W0QQitemZ320054385796QQihZ011QQcategoryZ116508QQssPageNameZWDVWQQrdZ1QQcmdZViewItem)
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Post by: jeep94 on December 02, 2006, 02:49:13 PM: Looks good! Trouble is mine is a 94.

Simon.
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Post by: dtooth on December 02, 2006, 03:19:41 PM: whats the difference is it workable for a good price a little modding would be worth it .
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Post by: tim_aka_tim on December 03, 2006, 06:18:28 PM: The only difference if that 95 -> 01 snorkels come with a washer bottle. From 95 onwards its under the wing, where you need to put the snorkel intake pipe, so in that kit, they provide a replacement.
Personally, I bought an 84-94 snorkel, and made my own washer bottle.
If you bought a 95-01 kit, you'd have a left over bottle, that's all. It's the same apart from that.
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Post by: jeep94 on December 04, 2006, 10:26:02 PM: Many thanks for the info.

Simon
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Post by: jeep94 on December 06, 2006, 06:09:34 PM: Only gone and got myself a Safari Snorkel!

Any hit's and tips on fitting it! The vehicle is 94, but the kit is for a 95> so I should have a bottle left over.

Simon.
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Post by: MOCAJ on December 06, 2006, 06:21:17 PM: hints and tips- yep, be confident when you cut the big hole in the wing
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Post by: tim_aka_tim on December 06, 2006, 06:31:16 PM: Thats about the size of it......... tape the template in the wing and think of England while you drill several holes in your truck. The one in front of and beneath the air box is a pig to get to. You're gonna remove the front nearside wheel too, so make sure its on stands. The inner wing can be a pig, so use brute force with it. You might need someone with small hands to stick them inside the wing and tighten the rear nuts on the external air-pipe - ratchet spanners are good for that job. Use plenty of silicone where the airbox joins the new down-pipe and remember to seal the holes at the bottom of the airbox.
Et voila - you just murdered your performance, but maybe saved your engine!
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Post by: AdrianW on December 07, 2006, 01:02:05 PM: Tim

Interested in your "murdered your performance" comment, just wondering if it's based on personal experience. Haven't done much to ours engine-wise, but have panel K&N, Safari Snorkel, PowerAid TBS and am running 30s with no regear, but it was pulling an easy GPS verified 110mph on the Autobahn on the way back from Cornwall. I thought that a snorkel gave an improvement as the air is colder (than that taken under the bonnet) therefore more dense allowing more fuel to be pumped in, plus if sealed correctly you also get the ram-air effect increasing density further.

Must admit that had to back off from the 110 after a few minutes as crankcase pressures got too high and it started to blow oil past the rings - that scared the bejasus out of me, but it's been fine for the 4 months since

Cheers

Adrian
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Post by: Dave69 on December 07, 2006, 01:18:30 PM: ram air effect with an air filter not quite. an increase in air box pressure maybe.

ram air is normally associated with an open air box and a fine mesh screen or open intakes. Normally associated with race bike and race cars more relevant to the bikes TBH.
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Post by: tim_aka_tim on December 07, 2006, 02:09:32 PM: Quote from: "AdrianW"
Tim

Interested in your "murdered your performance" comment, just wondering if it's based on personal experience.

At first the performance was good - it was fitted on just about the hottest day ever. Been froadin' during the day (without snorkel) and the engine was bloody awful due to the heat. After fitting the snorkel that night, the following day was just as hot, yet the engine had a new lease of life.
However, once the weather cooled down, I noticed that performance was significantly reduced when the outside air was bearable.
I put in a K&N panel filter, but it made no difference. The Safari just has too many bends and a length of corrugated tube which restrict the airflow.
MPG has also decreased.
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Post by: jeep94 on December 09, 2006, 04:47:03 PM: Great, I now have my Safari Snorkel! But before I start cutting holes everywhere, is there anything I might need before I start?
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Post by: dtooth on December 09, 2006, 05:06:10 PM: I hole saw 8) and balls of brass
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Post by: AdrianW on December 15, 2006, 08:55:13 AM: Quote from: "Dave69"
ram air effect with an air filter not quite. an increase in air box pressure maybe.

ram air is normally associated with an open air box and a fine mesh screen or open intakes. Normally associated with race bike and race cars more relevant to the bikes TBH.

Dave, as you say the panel filter has fa to do with any ram air effect - hopefully increases air flow but will do nothing for air box pressure other than reduce negative pressure (on a stationery vehicle), for ram air to work the airbox is actually a fully sealed unit other than the venturi allowing air into it, and various bleed-offs for pressurising carbs (on my GSXR) and balancing crank case pressures.

On the Jeep, ram air comes from having a much larger (than standard) intake sitting up by the top of the windscreen - how much of this pressure build up is going to be lost due to the bends in the piping to the airbox I don't know, but ram air it most certainly is otherwise I wouldn't have blown a pint of oil out of the exhaust.
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Post by: jeep94 on December 19, 2006, 09:41:09 PM: Well that’s my Snorkel finally fitted! Haven’t noticed a loss in performance yet, but hopefully a K&N air filter will compensate if there is any. Should I also raise my axle breathers? Anything else to raise?

It’s a pretty simple thing to install and fit, the only part left over being the extra water bottle and attachments (kit was for a 95, but fitted on my 94).

Simon.
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Post by: tim_aka_tim on December 19, 2006, 09:58:45 PM: I personally haven't bothered, but others have plumbed them into the airbox. If the water's high enough to reach the breathers, then your distributor/leads/plugs are under about a foot of water also!