Modifying/Improving the 924 Turbo

Wes · Post by **Wes** » Tue Aug 18, 2015 6:46 pm

Head reassembled using standard cam and gear with solid followers:-

Head is fully ported with larger valves and heavier springs:-

Wes · Post by **Wes** » Tue Aug 18, 2015 6:48 pm

Copper gasket to go with the O ringed block:-

Wes · Post by **Wes** » Tue Aug 18, 2015 6:49 pm

Long block together at last:-

Wes · Post by **Wes** » Tue Aug 18, 2015 6:53 pm

Rear coolant entry and exit:-

Modified water pump and thermostat housing:-

Wes · Post by **Wes** » Tue Aug 18, 2015 6:55 pm

Crank sensor mounted. Flywheel has 60 - 2 triggerwheel mounted:-

Wes · Post by **Wes** » Tue Aug 18, 2015 7:01 pm

How to fit a truck turbo to a 'van' engine:-

Holset HX35 with twinscroll 12cm housing and 70/61 turbine.

Wes · Post by **Wes** » Tue Aug 18, 2015 7:06 pm

Engine in:-

Wes · Post by **Wes** » Tue Aug 18, 2015 7:08 pm

Old and new wastegates:-

2 x 40mm Turbosmart, each venting half the engine.

Wes · Post by **Wes** » Tue Aug 18, 2015 7:10 pm

One wastegate almost fitted:-

Wes · Post by **Wes** » Tue Aug 18, 2015 7:17 pm

That's me just about up to date with still loads to do.
Wastegates are almost done and I've just started with the 3" turbo-back exhaust.
Then there's the inlet to finish, massive charge cooler, 2 radiators, oil cooler etc etc... it's all good fun

nicksonmsport · Post by **nicksonmsport** » Tue Aug 18, 2015 7:41 pm

cant wait to see this up and running!! should be an animal with that turbo!

Wes · Post by **Wes** » Thu Aug 20, 2015 6:22 pm

nicksonmsport wrote:cant wait to see this up and running!! should be an animal with that turbo!

Glad to see at least someone approves of my antics on TIPEC.
The whole project seems to have become an exercise in over-engineering!

Waylander · Post by **Waylander** » Thu Aug 20, 2015 6:26 pm

thats going to sound like Concorde on a take off run, absolute magic

Althejazzman · Post by **Althejazzman** » Mon Sep 07, 2015 8:03 pm

Blimey! That turbo! Apart from being logistically limited on the location of that turbo, is the front a relatively cool place to put it?

Wes · Post by **Wes** » Tue Sep 15, 2015 1:10 am

Althejazzman wrote:Blimey! That turbo! Apart from being logistically limited on the location of that turbo, is the front a relatively cool place to put it?

I can't say for certain but it won't be too difficult ducting cool air to it.
The oil cooler I have is a 50 row Setrab unit and I only run synthetic oil so don't anticipate turbo bearing issues. Holsets are known to be tough units anyway.

The twin scroll twin gate exhaust manifold has been a pain in the proverbial from start to finish but it's almost complete now along with the 3" downpipe. I also fitted a couple of EGT probes in each wastegate pipe to monitor each half of the engine.
I think they'll also double up for measuring manifold back pressure

This first engine should be able to take a fair amount of boost. Pity the con rod bolts are stock otherwise I'd consider upping the revs.

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