Snorkel for 80 series.

Submitted: Friday, Jun 18, 2010 at 20:13
ThreadID: 79452 Views:6277 Replies:5 FollowUps:12
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I know this is obvious to all of you with a snorkel on an 80 series diesel but I just had an airflow snorkel fitted today and I cant believe the difference in performance in the car. Whilst getting above 100kph was fine previously the car seemed quieter and far more willing to crack the century and beyond. $500 all up and a bloody great investment if you are considering doing so.
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Reply By: Member - Crazy Dog (QLD) - Friday, Jun 18, 2010 at 20:46

Friday, Jun 18, 2010 at 20:46
Good 2 hear...Was it a 1HZ without a turbo?

Grrr!!!
AnswerID: 421353

Reply By: Whittsatwoopi (NSW) - Friday, Jun 18, 2010 at 21:14

Friday, Jun 18, 2010 at 21:14
Yep, sure was - I am just totally blown away. I am no mechanic so the only way I can express it effectively is to say it goes faster quicker, easier and quieter. Are you contemplating adding a snorkel on?
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Follow Up By: Member - Crazy Dog (QLD) - Friday, Jun 18, 2010 at 21:20

Friday, Jun 18, 2010 at 21:20
Yup so that is really good to hear.

Grrr!!!
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Reply By: 3GoBush - Friday, Jun 18, 2010 at 21:19

Friday, Jun 18, 2010 at 21:19
Hey Whittsatwoopi

I don't mean to rain on your parade, but putting a snorkel on a 1 hzj vehicle and claiming it has enhanced your performance is purely a placebo affect.

I have owned several 1hzj vehicles then added a snorkel with no performance added.

However adding a snorkel to your truck is definitely an advantage, cleaner air for 1 and for water crossings.
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Follow Up By: Whittsatwoopi (NSW) - Friday, Jun 18, 2010 at 21:28

Friday, Jun 18, 2010 at 21:28
I am surprised by that, I would have thought that cooler air that is pushed through rather than warm air sucked through might have made a difference.
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Follow Up By: 3GoBush - Friday, Jun 18, 2010 at 21:40

Friday, Jun 18, 2010 at 21:40
The cool air that goes into the snorkel, then through the air cleaner, across the top of the hot engine, enters the intake at the same temp as the air that goes into the air box then via the air cleaner and then across the same hot engine.

However if you ask Mainey, he will tell you that Hiclones work and improve the performance of you truck, I have unfortunately proved this not to be true as well.
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Follow Up By: Member - Amy G (QLD) - Saturday, Jun 19, 2010 at 20:41

Saturday, Jun 19, 2010 at 20:41
Agreed, my snorkel gave me more noise and peace of mind. The peace of mind makes it worth it :)
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Follow Up By: Whittsatwoopi (NSW) - Saturday, Jun 19, 2010 at 21:31

Saturday, Jun 19, 2010 at 21:31
Thanks Amy, I agree - the other benefit is looking less like you're driving a Turramurra tractor :-)
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Reply By: Spana - Saturday, Jun 19, 2010 at 09:35

Saturday, Jun 19, 2010 at 09:35
I put the same snorkel on my 80 a few weeks ago, not hard to fit either.
I can't really say I had any real noticable change to performance, it's deffinately no worse though. I do have the 1H-DT motor, so not sure how efective the cooling air is then.
4WD Action mag did a fuel effeciency article for a few weeks, and there tests did show a drop in fuel consumption, and noticed better running.
I was just hoping it would kick me in the face the first drive! It didn't, and I fear any extra performance felt is my wishfull thinking :(

Cheers
Troy
AnswerID: 421393

Follow Up By: Whittsatwoopi (NSW) - Saturday, Jun 19, 2010 at 11:21

Saturday, Jun 19, 2010 at 11:21
I am a bit surprised by what the other guy said as the 80 does seem to be running better and I have noticed it is easier getting up to the 100kph mark. Also, despite that the air passes through the engine bay the speed the air is moving through the inlet would have limited too much of a temp increase. I didn't expect the 8o to go any faster or accelerate any quicker just get there easier and the engine isn't as loud getting to the century. If I am correct the turbo heats inducted air up and intercoolers are used to get the air temp down before combustion so cool air taken through the snorkel (if that is the case) is going to be heated up by the turbo anyway. Do you have an intercooler or know of any benefits?
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Follow Up By: Member - Shane D (QLD) - Saturday, Jun 19, 2010 at 20:43

Saturday, Jun 19, 2010 at 20:43
I also had an 1HDT and put a snorkel on it, I think it was a safari type that had the forward facing ram type head.
Whilst I didn't really notice any gain in power or fuel economy overall, there was a noticeable gain in power when it was a cool humid night, living on the South coast of New south wales and constant commutes to Canberra, I got a very good "feel" on how it performed in undulating country and there was tangible difference between doing a day run or early morning run.

again, I have no scientific data to back this up,

I wanted a snorkel mainly for river crossings and cleaner air.
I now have a 1HZ with the factory snorkel that has a large pre-cleaner that seems to work well.

A lot of primemovers have there air intakes extented to above windsreen height with the theory that the air is cooler and denser (not to mention cleaner on dusty roads) thus gaining more power, not so much during the day but when the sun goes down the road retains a lot of heat, getting air from 4 meters above will be cooler, well, thats the theory anyway.

Shane
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Follow Up By: Whittsatwoopi (NSW) - Saturday, Jun 19, 2010 at 21:30

Saturday, Jun 19, 2010 at 21:30
I used to live at Narooma and I have to say that it would be a pretty busy trip over the range to Canberra, did you go through Braidwood or Brown mountain? I would be wanting an automatic gearbox if I had to do that trip to often!

We really need a set of temps taken at end of the air induction system with both systems to see if it works or not. It is very difficult to quantify how the car feels so I can only say that the 80 to 100 kph range seems to work more easily (please step in anyone who can contribute here!)
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Follow Up By: Member - Shane D (QLD) - Saturday, Jun 19, 2010 at 22:05

Saturday, Jun 19, 2010 at 22:05
I sort of lived at Moruya and travelled the Clyde, not so busy 10-15 years ago,
Leaving Moruya at 4 am, usually only had to dip my high beam a coupla times, bit different now I bet.
Mine was Manaul, The Td could do just about any hill in 5 th anyway, except corners of course
Shane
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Reply By: pdm3006 - Saturday, Jun 19, 2010 at 22:52

Saturday, Jun 19, 2010 at 22:52
Hi Whittsawoopi.
When they fitted the snorkel, they didn't by any chance screw in the maximum fuel adjustment screw a little did they ?
If so that would explain the extra power.
I fitted an airflow snorkel to a 75 series 1HZ diesel a while back. Slightly better fuel consumption, more torque way down low (below 1000rpm), a tad more power but not super noticeable.
I intend taking mine to Rankin Diesel to have the injector pump tuned given that air supply is now not an issue. I expect they will tweak that maximum fuel screw but I don't know how much is safe.
Was going to screw it in 1/8 of a turn myself but chickened out.
Rankin will no doubt know how to fiddle all the screws which I have no clue about.
Cheers.
Peter.
AnswerID: 421482

Follow Up By: Whittsatwoopi (NSW) - Saturday, Jun 19, 2010 at 23:11

Saturday, Jun 19, 2010 at 23:11
Thanks Pete, I'll have to ask them that on Monday - I am really keen to know. I know what you mean about adjusting things like that, I am a bit reluctant having just got my first diesel. As far as fuel consumption is concerned I dont mind using a bit more fuel if the 80 rolls a bit better - if I was going touring I'd want to get some advice coz I dont want a conked donk!
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Follow Up By: pdm3006 - Sunday, Jun 20, 2010 at 11:39

Sunday, Jun 20, 2010 at 11:39
I honestly think that is what has happened if you are truly seeing a big performance improvement.
Easy way to tell is take it for a drive with someone following you. Preferably with both of you carrying two-way UHF radios for ease of providing feedback.
Take a road that has some longish hill climbs that would cause you to floor it in 5th gear. Does it blow any black smoke ? If so it is running at least a little rich and the fuel screws have likely been adjusted. A little smoke is not bad though.
My 1HZ never blows any smoke which leads me to believe it has been previously tuned lean. Good for longevity and fuel economy, not so good for performance. It uses 12lt per 100km with mixed town, open road and off road use. 10lt per 100km with only open road driving.
For example when people add a turbo to a 1HZ. More air and same fuel equals same performance. You are simply running leaner which is not bad for a diesel. To make more power you need more fuel.
A popular tweak when adding a turbo is to screw in that max fuel screw a 1/4 turn but often people get carried away and screw it in further with resultant problems from running too rich like high EGT leading to holed pistons, etc.
Maybe there should be a thread started regarding tuning a 1HZ injector pump on a normally aspirated engine on here ?
Cheers.
Peter.
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Follow Up By: Whittsatwoopi (NSW) - Sunday, Jun 20, 2010 at 18:17

Sunday, Jun 20, 2010 at 18:17
Thanks for the great tips there - good ideas all. There isnt a massive improvement in performance , I'd call it more noticeable than anything.
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