Thanks,

we're running all gauges including EGT and my friend (whose car it is) is tempted with an AF Knock amp. It'll be running most likely a Link G4 ecu, we'd like to see near 390-400bhp, is 1.4bar feasible on the stock HG, possibly 1.5bar?

Don't want to upgrade the HG at this point, my friend isn't overly bothered about failure as its an excuse to go internal, personally I'd rather not destroy it, so we'll up it sensibly and see how we go.

Cheers
Nito

Unless your running EGT's on each exhaust runner I don't see how you can really judge whats going on in terms of increasing things slowly until it fails.

Also I know a lot of people think in terms of well I'll just drive it until it fails then stick forged pistons in you may well end up having a weaker engine as the bores may require more work than if you rebuilt the engine before it failed.

What sort of cooling package does the car have? Intake, water and oil?

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GT4DC Events Co-ordinator
1996 ST205 UK

IMO you can get away with around 400bhp but it is the torque/boost that you need to be concerened about. Running 1.2-1.3 bar seems to be possible for extended periods but above that it seems to be more a case of when not if. With a big turbo & cams you can get 400bhp at these boost levels on std engine internals although you will need to stirr the box a bit.

Even with individual EGT per runner and the HKS AF Knock amp (luvverly bit of kit BTW - I have one and very clever knock analysis algorithm linked to engine location so it can filter out general noise) The EGT/knock will only detect an event happening, quite often some damage has already been done at that point.

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JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Hi guys,

The EGT is tapped into the turbo, I have an HKS Knockamp on my own Skyline and they are great bits of kit. We'll run EGT's around 870 with warnings set to 900 degrees peak. Certainly absolute flat out max at sustained top speed of no more tha 930 degrees ever. We'll try to connect this up to the Link G4 for active knock control if possible although we're not intending to run it up to knock anyway, probably 2 degrees of knock when it's mapped. The plan is to map it so there is no knock, the knock amp is just a second line of defence against a bad batch of fuel and the like which will flag up any issues and he can reduce the boost accordingly.

I was intending to run it to between 1.3 and 1.4 bar of boost.

The car has FMIC, Koyo large capacity aluminium radiator, various oil coolers (its a WRC spec) and oil temp, water temp, oil press, boost and EGT gauges. A/C and chargecooler gubbins removed and all pipework rerouted!

Turbo is the GT3071 with a 0.63 ex housing and massive 4" intake. Externally gated (Tial).