finchyboy

In the process of bolting an Andy Forest 20g on my new 2.5 build.

I have used the original VF series oil feed pipe and banjo bolt and it seem's to fit perfectly.

I've since3 spoke to a friend and he tell's me i need to use a different type of banjo bolt from the VF series turbo's and may possibly need a high flow oil feed pipe (that apparently comes with these turbo's when they are new)

Any idea's of what a may or may not need ? As i say it look's to be o.k at the moment. I just want to get it right before i drop the engine back in the car as it will be a real bitch to change it afterwards.


Thank's in advance

Liam

andy97

iTrader: (1)

The ball bearing turbos need less oil flow, so get the right oil pipe or you could run the risk of starving the 20G of oil.

WUZ

iTrader: (14)

The hole in the side of the Banjo bolt is larger for the TD series (Thrust bearing) than the VF22/24/28/29/30 series (Roller bearing) for the reason stated above.
Running the Banjo bolt as you are means the Thrust bearing is not getting enough oil (shaft floats on a film of oil between the bearing and the shaft, etc) so it'll die sooner rather than later.

Replacement TD04/05 Banjo bolt is about 10 pounds or so from Subaru...

Russell

finchyboy

So i need the banjo bolts with the bigger hole's in at both the the engine head and the turbo end and can retain the old oil feed pipe yes ?

Butty

iTrader: (2)

Liam, just check what bolt you have already.
I found my old 03 WRX was fitted from the factory with a 1.5mm feed banjo at the turbo
Previous TD04 cars had the larger size (5mm?).
I've just swapped my VF43 with a 20g while still using the OEM 1.5mm feed - Zen seemed to be OK with this.

nick

finchyboy

Cheers Butty i've been told to drill out my old one's if they are too small won't get a chance to look for a couple of days.

If they are in fact to small what size do i drill them out to ?

Butty

iTrader: (2)

I wish I knew
Perhaps a call to Andy F to clear it up?
I had a good search on 22b.com when I did the swap and even they didn't seem to have a definitive answer.

Nick

finchyboy

Yeah cheers mate i tried Andy Forest this morning but just got his answerphone. I've been told it's o.k to run them either way but it'll be nice to have it right.

old bob

wot power you hoping for with a 20g on your 2.5?

finchyboy

i'm hoping for somewhere around 400 bhp and 400 ft lbs of torque.

winker

iTrader: (1)

if not sure finchy get intouch with andy forest himself he will help you.

old bob

is more possible? still undecided which one to buy for my 2.5 im building, want betwen 400-450

sorry for hi-jac

Butty

iTrader: (2)

Forged pistons or a factory std 2.5?

I've just had 377/366 on a std engine/TMIC/20g from Zen.

nick

finchyboy

Running forged wiseco piston's so should be able to crank the boost up.

Butty

iTrader: (2)

And give it some timing as well.
Are Zen mapping it & can you post up a rolling road print out when done?

nick

finchyboy

No Simon at Jolly Green Monster is going to map it for me