Page: 1 2 3 4 5 6 7 8 9 10 11 12
|
|
Re: Xtrail Snorkel
I wouldn't put it this way and say that no one can dyno a CAI or a snorkel, but I would instead say that like it is the case with the dyno environment, dyno testing things like a CAI or a snorkel may not be 100% accurate in a dyno set-up because no one can replicate the standard driving conditions in a dyno set-up.
It is the same case as dynoing any other car where these figures are used as best estimates compared to the same car driving in real road conditions where wind resistance is a big factor (among other things).
|
|
22/Oct/2009, 7:23 am
|
|
|
|
Re: Xtrail Snorkel
quote:
No-one can dyno a CAI, or snorkel set up at all, because no one can "induce mass air at speed into an intake."
Sorry, that was pertaining to South East Queensland businesses only. And your right, anything can be dynoed if you want it to, however for IMO there would be absolutely no difference to statistics. (stationary with stock intake, stationary with snorkel, stationary with CAI...without airflow what change will there be?)
I have seen a set up, manufactured in Australia, that runs 2 MASSIVE 3 phase industrial fans (one through engine bay, one through air intake)...all hooked up to the dyno so accelerator position is replicated by wind speed. However the closest ones to me are Cairns and Melbourne 
Basically, to gain any real figures (this is just my opinion) I would need to simulate air flow. So it will have to be done as "real world" figures....specifically, fuel consuption and air intake temp over time (trying to maintain constant wheel pressures, drive at the speed limit, keep the aircon on, windows up....its harder than it sounds!)
Also keeping a close eye on my filter
---
Dave
02/T30 TI (C)
|
|
23/Oct/2009, 7:06 am
|
|
|
|
Re: Xtrail Snorkel
Dave, of all the "dyno days" I've been to over the last 10 years or so, I've always seen a large fan placed in front of the car, to keep the radiator/engine cool. Nowhere near as advanced as the setup you've described, and obviously not as accurate results, but I'd say it's more a safety precaution than anything else...
--- Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_BFG_TBS_home-made-bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory. |
|
23/Oct/2009, 12:05 pm
|
|
|
|
Re: Xtrail Snorkel
Rich,
New dyno places are now using a fully air-conditioned room to keep temperatures down (of the engine) and it is sound insulated and has huge extraction fans as well. When the T31 was dynoed at the new dyno place, we couldn't hear and/or smell a thing.
|
|
23/Oct/2009, 12:08 pm
|
|
|
|
Re: Xtrail Snorkel
Looks awesome mate. 
--- Jamie - X112(c)
Black 2005, Auto ST-X, (Series 2)
Black Thunda is the name, splashin' around is the game!
 |
|
26/Oct/2009, 10:19 pm
|
|
|
|
Re: Xtrail Snorkel
I have just completed some testing on the snorkel, via Scanguage 2, primarily fuel consumption, air intake temp, and coolant temp.
The car has completed 5 tanks of standard unleaded, around town urban driving, with aircon on and windows up. At the speed limit as well, which is pretty hard to do.
It also got 470 kms of hilly, road driving in one hit.
First off, the easy figures.
The engine coolant temp sits at a consistent 92 degrees C as indicated by Scanguage. Prior to the snorkel, with both OEM intake and CAI, it sat on 97 flat. Why this is the case, I am unsure.
The intake air temp is consistently cooler than the OEM and CAI figures. Better yet, at highway speeds the MAF temp is at ambient (I measured both external air temp with a digital meter, and compared it to the Scanguage reading via the MAF).
Being black, and external to the vehicle, it does get hot in the sun whilst parked. I had it up to 60 degrees C (laser thermometre), however it doesnt take long after starting, for the intake temp to reduce.
Fuel consumption..an average of 4 tanks (city driving, aircon, speed limit) Scanguage gave an indicated fuel consumption of 9.7 litres per 100km with the snorkel. The consuption with the CAI was averaging at 10.9 (right foot is definately a factor here, however I am not the primary driver of this car)
The best part is this...in one day the vehicle travelled 472 kms (a meandering drive from Brisbane, over the range to Fernvale, Ipswich and back to Brisbane). Fuel consuption for this trip was an indicated 8.7 litres per 100km, over a steep range, and returning via peak hour.
If I was allowed to, I would grab a jerry, start with a full tank and drive in a straight line until i ran out of juice to see how far the car got.
I am going to make some changes to the set up at a later date, namely increasing the flex pipe from 80mm to 100, so its a direct fit onto the filter housing, and see what effect that has.
Sorry for the long read, all in all, I am very happy with this set-up
Cheers,
---
Dave
02/T30 TI (C)
|
|
5/Nov/2009, 7:20 pm
|
|
|
|
Re: Xtrail Snorkel
Its all win win as far as everything scangauge tells you.
Got me buggered why coolant temp is cooler considering that the thermostat has absolutely nothing to do with the workings of a snorkel.
Did it pick up if there was an increase of power to the engine?
--- Tony X-891c
2008 T31 St
HERE is my X Trail
|
|
6/Nov/2009, 5:30 am
|
|
|
|
Re: Xtrail Snorkel
The coolant temp is a weird reading. I havent touched the coolant system for a while, however it is definately reading lower, compared to the other set ups prior to the snorkel.
A i said, I cant work it out either, it is a strange one.
The scanguage has a function for Horsepower and percentage engine load. I dont really trust these figures because it doesnt take anything into account such as vehicle weight or fuel type.
It "feels" slower off the mark than the CAI, it is definately quieter than the CAI, however there is no really apparent loss of torque through the rev range. It pulls ,at speed, very well.
It definately feels more responsive, at speeds between 50-100 kmph
There is a function called "long term fuel trim" on the Guage. Prior to the snorkel I never had it read above a figure of 1 (doing above 80km, foot off accelerator and cruising). Since the snorkel it has hit 3 quite consistently. meaning the fuel consuption has been greatly reduced at speed and low revs. I think this is the biggest, recordable gain so far.
---
Dave
02/T30 TI (C)
|
|
6/Nov/2009, 6:34 am
|
|
Page: 1 2 3 4 5 6 7 8 9 10 11 12
Link to us
- Blogs
- Hall of Honour
- Chat
|
