1Y exhaust size

Post by **caveman** » 12 Sep 2008, 17:25

I was wondering what the outlet size on a stock 1Y is. I just want to know how much i will choking the motor if the exhuast from my KY has to go on when i switch them over.

Post by **HarryMann** » 13 Sep 2008, 09:36

Normal is about 2", 56mm ish from memory, TD pipe is about 2 1/4" and for performance a 1.9 turbo diesel optimum is 2 1/2" (63mm), but needs a bit of reworking of the flange entry (the small K14 and T2 turbos have a big expansion step within the housing immediately after the turbine)

I'd think if your KY exhaust is anything like 2" nominal it'll be fine... you could always make a new stainless pipe up later of slightly larger bore, if you can MIG.

FYI, the clamps 4th down on right on this page of Dynoflow's website are superb... make a strong joint between two pipes of same diameter butted together...

http://s229195592.e-shop.info/shop/cate ... id%3D12%26

Although the link that takes you to their firring accesories is currently broken...

Post by **caveman** » 13 Sep 2008, 13:34

Thanks for all the info, however i won't be turbocharging it. I'm just going the super pump way to get that much more power out of that 1.9. I just want enough extra torque so i can change the diff from a 5.5 to 4.86 so i can cruise at a reasonable rate of speed. But since i will be demanding more power than stock i want to make sure i can do whatever i can not
to restrict the exhaust. The manifold on there now has a 1 5/8 " outlet. I'm hopeing my 1.7 KY manifold is larger.

Post by **HarryMann** » 13 Sep 2008, 18:45

That's over 13% increase! I do hope your T25 is light with a streamliner body fairing and you don't have winds and gradients over there

Post by **HarryMann** » 13 Sep 2008, 22:22

Seriously, I'd like to have a 5% or 10% overdrive now again, when the going is good, in a 1.9TD running an effective 5.0 diff (5.43 with 15" tyres), but only an overdrive, not the whole gearset stepped up, as you'll be down in 3rd far too often for comfort when the going isn't so good... it's only 0.2 litres bigger. I really don't think it will pull a 4.86 very well....

I just want enough extra torque ...

Which means you'll be black-smoking everywhere, as you won't have the airflow... turbo is what you want, seriously!

Post by **caveman** » 30 Nov 2008, 16:48

HarryMann wrote:That's over 13% increase! I do hope your T25 is light with a streamliner body fairing and you don't have winds and gradients over there :)

Well, just road tested with the my new 2wd/ syncro 5 speed with LSD and locker. and the 4.86 . At first i was afraid that my trans builder got the R&P' s mixed up because i was expecting the truck to be dead slow in town and it seems to have the same torquey [but not fast ] acceleration as before. Then got up to the expressway and sure enough at 3600 rpm's i am now at 65 mph instaed of 55 and with lots of power left over to pass. I would guess my usable top speed is about 70-75. Not fast but quick enough not to be dangerous. If i want speed i'll just drive my 2.2 L 1302 beetle.

Post by **ringo** » 30 Nov 2008, 17:31

Thanks for the update Caveman,

What did you do to the pump in the end? Or what did you do to get such a good increase?

Ringo

Post by **HarryMann** » 30 Nov 2008, 17:42

Mmm... well, 65/55 is an 18% increase in gearing!

But a good outcome if you're happy... maybe air's thinner over there

Post by **caveman** » 30 Nov 2008, 19:51

The pump that came with the motor had a 8 mm head. I was led to believe a 1.9 1Y normally came with a 9mm . We installed a 10mm. I am still wondering is i will purchase a "super pump". This is in a transporter and except for the WVO tank and second seat it's pretty empty. It certainly doesn't weight anything like a Westy.

Post by **oldiguana** » 01 Dec 2008, 09:30

gew on then.....whats the super pump bit/arm intrigued now....always lookin for ways to extract a few more bhp from marladys 1y.......

Post by **caveman** » 01 Dec 2008, 15:29

I'm sure there are some on your side of the pond who can do it, but here there are 2 places that modify VW diesel pumps. Basically what they do is, install a larger head [the part where the injector lines actually attach to] , which has the effect of providing more fuel, and play with the timing adavnce so it comes on quicker and also modify the governor so it doesn't slow fuel flow as rpms increase.
The 2 pump shops are Giles in ontario and TinTIn here in quebec. check for info here: http://www.vwdiesel.net/phpBB/index.php
If you want to see some of what is possible with a 1.6 nonturbo VW diesel check this out : http://www.youtube.com/watch?v=hx9Ke-3L61M

Post by **caveman** » 01 Dec 2008, 15:35

As an other update, today we had some snow/freezing rain overnight so evevrything was pretty slippery this morning. I don't have my winter Nokians on yet but now with the limited slip , i find the truck more tail happy. I guess thats one of the disadvatages of LSD.

Post by **ringo** » 01 Dec 2008, 16:09

caveman wrote: i find the truck more tail happy. I guess thats one of the disadvatages of LSD.

Yep, your 1Y is definitely faster than mine was

Do you keep your van in a heated garage - or do anything else to cope with such cold weather?

Im just interested how you guys get on with a diesel in such cold weather - although my KY started without much trouble in the French alps after suffering -20....

Ringo

Post by **caveman** » 01 Dec 2008, 22:19

Winter starts aren't as bad as they used to be. First the petrol companies do modify their diesel fuel for the colder weather. The next thing is just making sure all 4 glow plugs work , use synthetic motor oil , press in the clutch, keep my hand on the cold start/timing advance which i only pull out as the motor wants to catch.

Post by **caveman** » 26 Dec 2008, 16:07

Okay more updates. I finally took a longer drive this past xmas and eve. Truck runs great on highway, keeping a good 62-67 mph cruise at 3400 rpms. No downshifts needed-but there are ony a couple of slow long grades, nothing too steep, but with my 1.7 those hills needed a downshift. No foot to the floor either.Haven't checked with any accurate economy rates but on veg it seems it was about 35 mpg. Haven't hooked up the vacuum lines for the diff lock yet, but the limited slip makes a big difference in deep snow. Have gotten stuck ,but once was on glare ice and another time the nose was shoved into a snowbank. Was having to give some throttle for 10-15 seconds at 0-10 o F to keep it idleing but i turned the fule up and now starts fine, it was 8 o F when i left this morning and no throttle or choke needed. Remember this is in a almost bare transporter without any camper gear, just seats and carpeting. The motor is basically a tougher 1Y with a larger injection pump.

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