blade7

Don't these 5 cylinder conversions cost a lot more than an offset ground stroker kit?

rmm177

Patrick,
They are forged rods with 22mm wrist pins made of 4340 crome moly.

Here is the link to the full description.

https://performancebyie.com/collecti...rods-audi-ttrs

Bob

333pg333

Ahh, thanks for that Bob. Look like a decent option. What are you goals for the motor?

rmm177

Patrick,
I’m hoping for a fast HPDE track car. 400-500HP is my power goal with a Rotrex supercharger, if a Rotrex solution for our swap becomes available. Otherwise a high revving NA engine.

Bob

alxdgr8

I don't know what an offset ground stroker engine costs...
But a few people have tallied up the costs to build the 07k for comparison. But still apples to oranges. You're comparing specialized machine work on top of a comparatively expensive and limited quantity engine to something you can find in literally any junkyard and buy off the shelf parts for in the event that something gets damaged.
In addition to all of the benefits detailed on the first page of this post (at least in comparison to a stock 2.5T I4, but many still apply to a stroker engine). Different strokes for different folks.

333pg333

Sounds like fun Bob! I've not heard of anyone S/C'ing one of these. Good luck.

jgeckoa92

I gotta say as somebody who has pulled 3 (three!) different broken S2 motors out of my car in the last 15 months the benefits of this swap are clearly much more than just plain cost, however...

I could buy exactly twelve running 07ks for what I paid for my last 3 liter donor, which is now in pieces in my garage after a stuck injector destroyed one of its lovely Alusil bores.
Just the headache of trying to find 944 main bearings in stock this year is enough for me to want to look for greener pastures. One day...

rmm177

Patrick,
There is a separate thread about Rotrex superchargers for this swap, here is the link.

https://rennlist.com/forums/924-931-...-projects.html

Bob

blade7

Easy Tiger, I don't know how much either option costs fitted and running in the car. Enlighten me and tell me how much a 07k costs.

ealoken

A decent 3.1 is in cost not far off a decent 07k engine build.
easy 8-10k$ if you want upper powerlevel.

blade7

Isn't the attraction of a 3.0 hybrid stroker, that it's 4 widely available (cheapish) pistons/liners/rods plus fitting liners and offset grinding a 2.5 crank. The extra capacity should go some way to making up for 1 less cylinder. And there's no mucking around with a modified sump or bellhousing.

ealoken

I have a 400hp 2.5 with all cool mods.
But I want the sound of a 5syl.

JC951

because our cars sound good at idle and low rpms driving around town, until you get on it and the screams of the 4 banger makes you want to puke...at least thats how I think about it...

blade7

Buy a TT-RS or RS3 then, and get a much quicker gearbox, better traction and better brakes as standard.

rmm177

Blade7,
AFAIK, the VW 5 cylinder 07k engines were only built and sold in North America, so they may be unavailable or expensive in other locations in the world. Your stroker may be a better option in the UK. Hope this helps.

Bob