Quote:
Originally Posted by wjjkoevoets
Hi Sean,
Excellent and informative thread. Would you say the same holds true for the M235i N55?
Like you, I would be more interested in OEM-like consistency, power delivery and spool. I don't want to use methanol, ethanol or PI. I also do not want to upgrade my HPFP (except for the B58 pump maybe).
The PS2 seems to have the most turbolag and I would really want to avoid that.
The TTE460 and GP500 both seem like an excellent choice, but I am a bit confused about the price comparison between the two.
A local TTE dealer lists the TTE460 for €1,650.-. I would need a local mechanic to pull out the stock turbo (€1,200.-?), ship it, wait for TTE to modify it (estimate on their website is 30 days) and then ask the local mechanic to put the new turbo back in (€1,200.-?). Just upwards of €4,000.- total and I'd be stuck without a car for over a month. They also don't offer a core charge option so you either have to ship in your own turbo or buy a new one (€4k alone).
GP lists their GP500 turbo for the F22 for €3,991.93 including installation at their site. Their website does not mention any further details. It makes no mention of stock turbo removal, having to send it in up front or what installation actually entails. I dropped them an e-mail to get this clarified.
Any thoughts?
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Everything I said applies to M235 EWG, except:
1) M2 turbofold is bit more free flow. So expect better ignition timing and lower EGT (exhaust gas temperature, a critical reliability/consistency indicator) with M2.
2) G Power doesn't seem to offer 500hp version turbo to M235. Though M2 version probably will physically fit M235. Don't quote me on this, double check with them.
With TTE and Pure, you can pay core deposit (refundable) so they ship you the entire turbo (inc. turbofold). And you ship back your old core when you finish the swap, and take your deposit back if your old core pass their quality inspection. There is no down time with your car.
G-Power does not accept core exchange, or so they told me in May of 2018. You either ship them a core for modification, or buy a new core from G Power (they source from BMW), or drop your car at their facility so they build the turbo and install it for you.
I chose to buy new core because:
1) I'm Asia based, I can't afford to have quality issue.
2) I can get VAT refund as a none European Resident.
3) I can have my old core upgraded to PS2/GP500/TTE460 and sell it, which I did.
4) G Power is special. A new turbo adds to its specialness
Quote:
Originally Posted by cecaa850
The Dinan turbo seems like the best bang for the buck and most convenient to me. There's no core and it's the cheapest. It may not be the ultimate best performer but it's on the proper end of the law of diminishing returns and ease of exchange.
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I would argue TTE460 is a strong contender for the best bang for the buck, whatever gas you use. I still remember how my Dinan turbo got destroyed by a local TTE460.
At this day, that particular TTE460 (maxed out on pump gas by Halim) isn't much slower than my GP500 though I have power headroom. My 100-200 time is 8.0-8.2s, TTE460 being middle 8.5s. For benchmark, FBO stock turbo is low to middle 9s. FBO Dinan turbo is high 8s to flat 9.
Quote:
Originally Posted by ZM2
And, no lag....
Seems like SeanWRT setup is the only larger than Dinan turbo with only a tiny more lag. +40hp and a few grand more may be worth it if I ever get bored with the Dinan, but I don't think I will.
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Should I know there was the M2C coming at so cheap price (I expected at least 20% more over OG, with the new engine, seat, wheel and brake), my whole plan could've changed. I'd skip the M2 entirely and went straight for a 991.2s/gts in late 2016.
I mean the performance of the GP500 M2 OG is great, but the fact M2C guy can get it effortlessly and more, at a much lower cost, bugs me. You know, I put so much effort into this extremely detailed tuning to get where I am.
Quote:
Originally Posted by wjjkoevoets
The Dinan would be a viable option if I didn't live in Europe (no Dinan dealer anywhere close). With shipping, taxes and tariffs it would be closer to €2,000.-. At that price point, the TTE460 sounds like a better deal.
TTE460 - €1,650.-
PS2 - €2,900.-
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TTE460, I really can't recommend it enough. Tremendous value for the money.