Hawkeye STI internals - what are they good for?
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Hi
I've recently took ownership of a Hawkeye STI which has an RCM induction kit, BC coils, uprated pads/discs etc.
At the moment it has a prodrive downpipe/sports cat and a haywood and scott 2.5" system to the rear.
I've having a Miltek 3" decat installed next week and trying to get JGM to come do me a map. What other mods are people running in terms of power? I assume the standard turbo is good for 360bhp, I guess the next thing is something like an SC42/SC46? What are the internals good for on this car?![Smile](https://www.scoobynet.com/images/smilies/smile.gif)
Lee
I've recently took ownership of a Hawkeye STI which has an RCM induction kit, BC coils, uprated pads/discs etc.
At the moment it has a prodrive downpipe/sports cat and a haywood and scott 2.5" system to the rear.
I've having a Miltek 3" decat installed next week and trying to get JGM to come do me a map. What other mods are people running in terms of power? I assume the standard turbo is good for 360bhp, I guess the next thing is something like an SC42/SC46? What are the internals good for on this car?
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Lee
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Lee, 370-400 ish , just get Simon to check the map and you have no det, any higher and you are getting into forging territory.
Last edited by stevep360; 20 September 2012 at 12:46 PM.
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AT 360-370 i would be more concerened at HG failure than ringland as the standard 11m head studs are not up to loading under boost / any higher then you run the risk of both, 350 at no higher than 1.3 boost with a well looked after engine & its 60/40 in your favour .Any higher its a time bomb
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Headgaskets and arp kit, pistons a must, the rods are fine and have been run well over 400bhp with no issues, as an engine builder I would say safe at 400bhp but go fully forged over that. the 2.5's are reaching the limits of the block at 450bhp, many are running closer to 500bhp but they are marginal at that.
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So there are some Cosworth 11mm head bolts (260,000) high tensile for sale which i'm going to be buying. Should I be looking at 1mm or 1.3mm cometic head gaskets?
Going to be researching the pistons next
Just starting to collect parts to make the engine rock solid.
Going to be researching the pistons next
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Headgasket Cosworth will be better choice,not sure about the Cometic
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Less consistency to the 2.5 block in terms of what it can take and can’t take, I have seen a fair amount with head gasket and ring land failures in the last year, head gasket being more common. If you’re planning on upgrading the stock turbo then engine upgrades are best put in place imo.
Head gaskets and ARP studs a must followed by pistons which “can” be drop in, saving costs. If you’re planning much over 400 then rods should be added.
Head gaskets and ARP studs a must followed by pistons which “can” be drop in, saving costs. If you’re planning much over 400 then rods should be added.