I contacted Alan at enginetuner in January to talk about my fear of my 08 Hatchback STI getting the dreaded piston ringland failure. He gave me many options from a more engine friendly remap by Martyn up to a fully rebuilt engine. After seeing continued failures even on custom mapped cars. I decided that something more drastic had to be done.
The initial spec consisted of just replacing the pistons but Alan eventually convinced me that once I started modifying in this way I would want more and more. After many emails backwards and forwards with the idea of me eventually wanting between 450-500bhp, he came up with the following engine spec: Wiseco pistons, K1 H beam rods, cosworth bearings/gaskets and baffle plate, rcm oil pump and arp head studs.
After a little more research into enginetuners work and a tour of the garage I was finally convinced to leave my car in their capable hands after hearing of their development in the cosworth subaru. I handed over my keys and in return was given a courtesy car.
Four weeks later i was running it in, also added was a h&s full decat exhaust and a aem induction kit. After oil changes at 50, 500 and 1000 miles, Martyn worked his magic and remapped the car producing around 355bhp/355ftlbs.
Whilst getting further oil changes at 2000 and 3000 miles, I watched the development of another hatchback of a member here. So it wasnt long before I was looking at my own options of a bigger turbo and supporting mods.
After talking to Martyn about my options he told me about the opportunity of trying out a billet turbo from scoobyclinic. I agreed and the following package was put together: SC50 billet turbo, 800cc injectors, cosworth front mount intercooler, RCM headers (ceramic coated), bosch fuel pump, swirl pot, catch tank.
Although the target was only around 450bhp the sc50 was chosen because it was unknown if it was as good as it said on the tin and 450bhp would be available at much lower boost.
So the car was handed over to the masters at enginetuner to work their magic again. After the problems encountered with the other hatch they were working on. I knew that they would come across similar problems on my car. Mainly custom pipework to get the cosworth intercooler to fit. And standard fit turbos aren't so standard fit in a 08 hatch. After a few weeks everything was squeezed in and I just had to wait for Martyn to return from a well deserved holiday to begin mapping.
On return he was quick to find a problem for some reason the turbo was struggling to build over 1.1bar of boost. But he did find out that the turbo was gonna be up to making its claimed power no trouble at all as it was producing 430/430 at only 1.1bar. With this in mind and to make sure it wasnt the turbo that was faulty an sc46 billet was ordered to try. A couple of days later this was fitted but it was still not making target boost. After lots of head scratching and testing it turned out that the cosworth intercooler had thrown up another problem and was causing the standard dump valve to leak boost due to its position. So dump valve removed and here comes the results:
This graph is my original base map which is the prodrive 330s map vs sc46 billet at 1.5bar on tesco 99 fuel.
No extra lag but loads more power, what more could I want? There is a fair bit more in this turbo but I want the car to be fairly reliable and very road friendly and thats exactly what it is.
I cant thank Alan and Martyn enough, its definately my best trip back from plymouth by far.
Anyone worried about their 08+ Hatchback engine should get down to enginetuner. And anyone looking for a new turbo the SC billet range is the way to go.
Thanks again enginetuner
The initial spec consisted of just replacing the pistons but Alan eventually convinced me that once I started modifying in this way I would want more and more. After many emails backwards and forwards with the idea of me eventually wanting between 450-500bhp, he came up with the following engine spec: Wiseco pistons, K1 H beam rods, cosworth bearings/gaskets and baffle plate, rcm oil pump and arp head studs.
After a little more research into enginetuners work and a tour of the garage I was finally convinced to leave my car in their capable hands after hearing of their development in the cosworth subaru. I handed over my keys and in return was given a courtesy car.
Four weeks later i was running it in, also added was a h&s full decat exhaust and a aem induction kit. After oil changes at 50, 500 and 1000 miles, Martyn worked his magic and remapped the car producing around 355bhp/355ftlbs.
Whilst getting further oil changes at 2000 and 3000 miles, I watched the development of another hatchback of a member here. So it wasnt long before I was looking at my own options of a bigger turbo and supporting mods.
After talking to Martyn about my options he told me about the opportunity of trying out a billet turbo from scoobyclinic. I agreed and the following package was put together: SC50 billet turbo, 800cc injectors, cosworth front mount intercooler, RCM headers (ceramic coated), bosch fuel pump, swirl pot, catch tank.
Although the target was only around 450bhp the sc50 was chosen because it was unknown if it was as good as it said on the tin and 450bhp would be available at much lower boost.
So the car was handed over to the masters at enginetuner to work their magic again. After the problems encountered with the other hatch they were working on. I knew that they would come across similar problems on my car. Mainly custom pipework to get the cosworth intercooler to fit. And standard fit turbos aren't so standard fit in a 08 hatch. After a few weeks everything was squeezed in and I just had to wait for Martyn to return from a well deserved holiday to begin mapping.
On return he was quick to find a problem for some reason the turbo was struggling to build over 1.1bar of boost. But he did find out that the turbo was gonna be up to making its claimed power no trouble at all as it was producing 430/430 at only 1.1bar. With this in mind and to make sure it wasnt the turbo that was faulty an sc46 billet was ordered to try. A couple of days later this was fitted but it was still not making target boost. After lots of head scratching and testing it turned out that the cosworth intercooler had thrown up another problem and was causing the standard dump valve to leak boost due to its position. So dump valve removed and here comes the results:
This graph is my original base map which is the prodrive 330s map vs sc46 billet at 1.5bar on tesco 99 fuel.
No extra lag but loads more power, what more could I want? There is a fair bit more in this turbo but I want the car to be fairly reliable and very road friendly and thats exactly what it is.
I cant thank Alan and Martyn enough, its definately my best trip back from plymouth by far.
Anyone worried about their 08+ Hatchback engine should get down to enginetuner. And anyone looking for a new turbo the SC billet range is the way to go.
Thanks again enginetuner
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