engine re builder Herts

[arthur t]

Hi there,

Back to the original question, I have a STi spec V and it only goes to Datum Motor Sport. They are the only people I trust,

They have a lot of experience in Subaru's and all other sports / race cars.

Good luck with the engine rebuild.

Hope that is helpful.

[vxr2010]

an update the crank can apparently be polished so that's not an extra 550£ for a new one so it seems closer to getting it being finished soon

[Benjo42]

[vxr2010]

Hi Ben , is that your Fsti , yes mine on the right not seen that for a while , i assume you went there , did Len give any updates ? it's like waiting on the maternity ward lol

[buc427]

The 57reg fsti is mine,just in for a replacement sensor. Len was working on your engine when I was there on Saturday.
Your in good hands, Won't be long now hopefully.

[vxr2010]

what sensor stopped working on your's an 02 ? or something else ?

[buc427]

02 sensor.

[vxr2010]

i take it was the first 02 sensor in the exhaust system , not cheap , a cel or just running poor , what mileage was yours when it went ?

[buc427]

Your correct it was the 1st 02 sensor,price wasn't too bad. No CEL just rough running at light throttle. Currently on 84k I think.

[Benjo42]

I just posted the picture for Big Uncle Colin, as he is a total forum posting newb. Stick to lurking.

[vxr2010]

well two comments one good news one bad , finally got it back great , and second one i'm poor again lol , and it's time to run it in now

[macky17]

Dare I ask the bottom line?

[vxr2010]

5k by the time i'm done , doing a centre silencer delete more for noise but small cracks in the silencers as no flexi joint in the exhaust , arp bolts cosi gaskets oil pump forged pistons updated crank bearings standard oil cooler plus all the other standard bits , lucky i said a full rebuild or i would have been paying again for a bottom end rebuild not long after due to bearing wear and tear , so as i have always said on a 2.5 do bottom end rebuild too , slight score on crank but it was ok

[macky17]

Ouch. Well hope it's perfect now. How long is the running in?

[Ahbefive]

Wow, 5k is upsetting.

[vxr2010]

yes not cheap , the cost of subaru parts has gone up , the exchange rate being part of it , normally with a forged lump you get a bit of extra noise but there's none of that it sounds like a standard engine , compression is up , i'm hoping it does not need a remap and has no det , but they will check that on the oil change again , i don't what more power it has enough i just want reliability , it's a 1000 mile run in with an oil change at the end of that , under 4 k revs for first 500 miles then up to 5 k for next 500 miles from memory , the restrictor pill pipe is disconnected to keep boost down till it's run in but it feels punchier ? already

[Miner49er]

vxr2010 said:

yes not cheap , the cost of subaru parts has gone up , the exchange rate being part of it , normally with a forged lump you get a bit of extra noise but there's none of that it sounds like a standard engine , compression is up , i'm hoping it does not need a remap and has no det , but they will check that on the oil change again , i don't what more power it has enough i just want reliability , it's a 1000 mile run in with an oil change at the end of that , under 4 k revs for first 500 miles then up to 5 k for next 500 miles from memory , the restrictor pill pipe is disconnected to keep boost down till it's run in but it feels punchier ? already

I've just finished running in my Impreza with a similar build and mine felt stronger under the 4k rpm limit too.

I'd advise having the remap. My car's rebuild was like-for-like (was previously forged) but performs very differently. It produces similar power but 30lb/ft more, with both curves climbing 500rpm earlier in the rev-range than before. Doesn't sound much, but the car is way nicer to drive and has gone some way to justifying the cost of the build.

If Len mapped it previously, it should just be a 'tweak' rather than a 'full' remap? Either way, I'd still invest in a full remap for piece of mind if I was you.

[vxr2010]

Hi Miner49er , did yours have to be mapped for power , or was it running ok det fuel timing etc , if it has to be done as it's not right i would do it , the map was done by i don't know who as i bought it like that , i could do with out extra cost if i can , and i did not know that Len mapped cars , my previous fsti after a rebuild was much better and was never re mapped but not all maps will be the same , any thoughts ?

[vxr2010]

the benefit of the fsti is a smaller turbo so boost starts very early with little lag , the downside is the turbo tends to run out of puff at around 1.3 bar so probably less to gain by re mapping it ?

[Miner49er]

Hi, no, on stripping my engine down and subsequently inspecting components, it was evident that it had been running OK. Mine was a like-for-like build, so wasn't expecting any performance improvement.

I'd rather listen to your builder's opinion than someone off the internet, but I'm very surprised a remap isn't required as a result of all the new hardware. Regardless of that, it also surprises me that any builder would be happy giving you a warranty for his work without new mapping.

To reiterate though, I'm certainly no expert and that's what Len is... he has a decent reputation for good reason. Personally though, I'm much happier knowing my engine is now running at its optimum with the minimum risk of future damage.