Supercharged 306bhp GW197 T333DOB

MikeLYR27 said:
Nope. Way to high.
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You say that, the GT86 is 12.5:1, and there are a variety of setups (turbo and supercharged) on the market, namely Fensport (using the Avo turbo kit) and Lichfield (supercharged). However, the GT86 is direct injection so you can get away with a bit more. I think it'd take a good quality standalone first mind, also the 'few' psi that you could maybe run might not outweigh the parasitic losses.

MikeLYR27 said:
Forging isn't cheap mate, it's not just Pistons and rods. When supercharging you 100% want to uprated the valves, I found out the hard way, with Fernandez as a passenger, a **** map didn't help but you don't wanna pay 2k like I did when it could be done for less than half with a forge build.
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Def agree there with that, for £450 or whatever it costs for the valves are worth doing. I did a bit of research and found a number failures with the crappy 2-piece valves. No point risking mangling everything for the relative small extra outlay.
 
That Is a completely different engine mate, and a much better engineered one at that. You can turbo a type R to 400bhp on a standard lump. But in the naff f4r no way, and further increasing the compression, there's no way. Mine was running 10.5.1 and was to high for a turbo. Lost power.

I can see your logic, because I thought the same, but it doesn't work on these. Which is unfortunate. Which will be why again, no one runs high compression FI.

The valves are better then the 182's, no where near as many failures. Anything cammed, or supercharged that revs to 7.8k, the the valve springs become the weak point and are far more susceptible to valve bounce. To be fair you could get away with just doing springs, more so with just cams, that's what I would do. But running FI and forging the block anyway then you would be daft not to.
 
TB Rich said:
You say that, the GT86 is 12.5:1, and there are a variety of setups (turbo and supercharged) on the market, namely Fensport (using the Avo turbo kit) and Lichfield (supercharged). However, the GT86 is direct injection so you can get away with a bit more. I think it'd take a good quality standalone first mind, also the 'few' psi that you could maybe run might not outweigh the parasitic losses.



Def agree there with that, for £450 or whatever it costs for the valves are worth doing. I did a bit of research and found a number failures with the crappy 2-piece valves. No point risking mangling everything for the relative small extra outlay.
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it wouldnt just be valves I would be worried over the rods... aint the best engineered bits in the f4r...

just as a mtter of interest the fiesta st runs 10:1 c/r and is turbocharged..but uses the direct injection to help with temperatures/detonation
 
Raptor6767 said:
Nope, sticking with the 5504402 that are in the car at the moment.

Hoping to do the head this year...but first is the custom made intake. :smiley:
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What's to be gained with raising the compression then? Sounds like a lot of money for not much gain?
 
MikeLYR27 said:
What's to be gained with raising the compression then? Sounds like a lot of money for not much gain?
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With the cams compression has dropped a bit now so just to get it back and hopefully some hp too. :wink:

I'm now in the 1hp=100€ turf. IMHO.
 
I might be wrong here but aren't valves prone to failing only when you raise the limiters on our engines? As far as I know and correct me if I'm wrong the valve train is not a problem when revs stay the same so why upgrading?
 
Yiannis197 said:
I might be wrong here but aren't valves prone to failing only when you raise the limiters on our engines? As far as I know and correct me if I'm wrong the valve train is not a problem when revs stay the same so why upgrading?
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It's because of the springs really, valve bounce.
 
mine had the limit raised to 7850rpm and still head butted the limiter on all standard parts...would say standard springs good for 8k revs...don't see any in work with broken springs (yet)
 
Catcam valve springs are ment to reduce "Bounce" in the higher rpms, I think they have slightly higher spring rate. Only £120 for a set, so no brainer really.
 
Stephenvenning said:
The catcam ones I fitted weren't double springs, the supertech ones are but they are crazy money.
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Correct, catcams are stiffer but not wildly so apparently, still a single spring. Those Supertech's are properly expensive aren't they, titanium retainers though (very fast and furious!):smile: Not really needed unless you're going to solid lifter profile cams though.
 
When the ST goes back I wanted to get a 197/200 and SC it... Would sleeve's not save you getting a forged block or is the block itself to thin for this? then just get forged rods and pistons? Unless I've missed something and thats what you mean by a forged block sorry if that sounds stupid just looking in to it at the minute.

Awsome project btw will be watching with a keen eye.
 
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adam1942 said:
When the ST goes back I wanted to get a 197/200 and SC it... Would sleeve's not save you getting a forged block or is the block itself to thin for this? then just get forged rods and pistons? Unless I've missed something and thats what you mean by a forged block sorry if that sounds stupid just looking in to it at the minute.

Awsome project btw will be watching with a keen eye.
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yes when i say forged i meAn pistons, rods etc into a standard block mate
 
quick update as the bumper was off yesterday just to replace 1 f**cking bulb.
so going to try and get a restrictor sorted soon as possible as a possible new job means im going to have to invest in a cheap runabout to get me there seen as a 17mpg clio is not ideal so the forging is going to have to wait.

looking to sort some tyres and get a wheel refurb done when they are changed and after that its going to be new gearbox with diff and clutch as well as a new manifold around may time.
few piks behind the bumper coming up soon, also changed back to my originial front bumper support as the weld i had done on the other to support the nuts had cracked so going to redo it when i have time.
 
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