2.5L GTi engineering KV

Posted: Sun Mar 09, 2008 9:25 pm

anyone know anything about this engine?

any info you can give me will be greatly appreciated, thanks.. Rolling Eyes

cheers!

UltraUser Joined: Jan 21, 2003 Posts: 4230

I believe it was based on the 2.5 Diesel lumps block, there I've started someone else can finish Evil or Very Mad

UltraUser Joined: Jan 21, 2003 Posts: 4230

Oettinger is the name you're after there is a guy on here who has one mail him for info http://forums.audiworld.com/4000/msgs/153167.phtml

Then there was a guy on these boards who had a 90 do a search for Oettinger Evil or Very Mad

Posted: Mon Mar 10, 2008 9:58 am

the GTI Engineering one was similar; try www.autometrix.com to see if they have any back issues of Volkswagen Audi Driver magazine (Not Audi Driver or VW Driver- you need to go back much further than that)- they will have done road tests of cars with this in, details, etc.

UltraUser Joined: Mar 18, 2005 Posts: 1570 Location: Gwent

There is an obscure crank from an 'industrial' engine with the 92.8mm stroke, you could use this with 3A or 6A pistons to get your 10v/20v up to 2.5L. If you used the tdi 2.5 crank which is 95.5mm stroke you end up with approx 2.6L but need custom pistons. Either crank could could be used in the shortdeck block, but the crankcase area needs opening out to clear the longer 'throw' of the crank.
Either could be used in the talldeck tdi block (which presents its own obstacles) You would use VW ABF/2E conrods, again pistons would need to be modified/custom with the 95.5mm crank
034 105 101 J = 92.8mm stroke
074 105 101 = 95.5mm stroke

Site Moderator Joined: Jan 31, 2003 Posts: 9144

The VW Vanagon engine is a 5 cyl 2.5 litre petrol.

Just needs tuned a bit as it's only 160hp in standard form

Posted: Tue Mar 18, 2008 8:18 pm

well i'm fitting a 2.5L gti engineering lump (RE2500) to the CQ in a couple of weeks.

apparently it develops 170bhp & 180 lb/ft.

Anybody know how good the big valve head is on them? Just wondering if the head design is as good a the TSR C pack one. Question

apparently they used the standard CAM in the engine, so it has a nice spread of torque. Cool

but with a different CAM i've heard you can get 190bhp out of it? Very Happy

any idea how negative an affect that will have low down in the rev range?

also these engines don't use 'hydraulic lifters' either.. so would i be able to rev higher do u think? Rolling Eyes

cheers.

Posted: Tue Mar 18, 2008 8:44 pm

it may be worth trying to fit an oil pressure gauge so you can see how it runs...

as for changing the cam, you'll need (ideally) a vernier pulley. I've got a brand new one in it's box for a 5 cylinder (its for sale- I'll need to see your existing one to know if it fits or not- there are 2 types) ....... idle will be a bit lumpy, I guess, but nothing major. (I've got a fast road cam in mine without the pulley- doesn't fit- with TSR pack C- reckon its at about 170bhp or so, maybe more)

The vernier pulley is so you can set the timing bang on for a modified camshaft.

If the head is separate, measure the valves. There's probably not much between a pack C head and the one you've bought....

What's the mileage on the engine, do you know?

I bet you're keen as mustard to fit it, but I'd suggest the following:

if you don't know the mileage- new timing belt, water pump, tensioner (if fitted), oil and filter change. Belts typically need to be done about every 60,000 miles; solid lifters means no hydraulic Tappets to go tits up... (rattle)- if it is rattley, you may need to check the tolerances of the shims and get new ones if necessary (proper old school stuff this!)

Is the air filter & exhaust standard? If so, looking at changing these will improve air flow in and out.... if modifying the air box, note that you CAN remove too much from them- you need to be able to have some pressure in there- do a search for this- also an article (minus pictures) on the homepage- search for that as well.

Enjoy. Very Happy

UltraUser Joined: Mar 18, 2005 Posts: 1570 Location: Gwent

I didn't know we had the petrol 2.5 here, but it is common in the US (they did not get the tdi). South Africa had a 2.6L version!
The bore and stroke are the same as the tdi at 81 x 95.5mm. The gudgeon pins are 24mm diameter.
I read that the conrods are 154mm between centres. The 2.3 uses 144mm and the tallblock 2 litre rods are 159mm.
From what has been written on motorgeek, this engine block is either very similar to if not the same as the tdi.

Posted: Tue Mar 18, 2008 10:51 pm

Being a longer stroke means the revs wont be able to go as high before the average piston speed exceeds safe limits.
Thats why a short stroker can rev higher.
I wouldnt worry too much about being able to rev it higher, just enjoy the extra torque and power youll have by shortshifting and riding the wave... Smile

Posted: Wed Mar 19, 2008 10:32 am

vernier pulley now sold, in case you ask - was picked up about 20 minutes after I made the post...