Liam's Z4C race car project

Liam22 said:
Wursle said:
Also look into the N54 Manifold swap for a cheap way to pick up extra horse power with the MILV's as it will rev all the way to 7400!
Any evidence for this? I had a quick look but seemed inconclusive. Also some question on throttle body sizes.

Wursle said:
How are the Megane calipers and M3 discs holding up now? are they still going strong and is there any desire for more braking?
Pretty well. They've been through 2 sets of pads now and starting to show signs of micro-cracks. They'll certainly do another season, probably two.

This is the link that got the N54 Intake discussion going
https://www.1addicts.com/forums/showthread.php?t=1451616

Good stuff regarding the megane brakes! so other than brake wear and tear nothing bad to report. just out of interest what are the wheel sizes / offsets for the wheels you run? I run a 17x9J ET30 and i am wondering if my wheels will fit over.

If you are looking for a good disc to run next PFC do some 2 piece rotors for the m3 that you can get in blanks without the holes.
 
Wursle said:
what are the wheel sizes / offsets for the wheels you run? I run a 17x9J ET30
Fronts are 17x8J ET34 (E90 fitment). I needed 5mm spacers to clear the calipers but that depends on the spoke style and dish.

Braking performance is excellent for the weight of the car. 1.7g deceleration on Nankang AR-1 tyres.
 
Wursle said:
This is the link that got the N54 Intake discussion going
https://www.1addicts.com/forums/showthread.php?t=1451616
That's a N54 intake manifold on an E82 128i (US market). That car has the low power (228bhp) N52B30 engine so will have the "lesser" stock intake manifold. So I'm not yet convinced that the N54 intake on the 261bhp engine will show a benefit.
 
a few years back before I bought my M I was looking into upgrades for the N52 - some dudes in the US had firstly got them revving to 9krpm with no issues, making think nearer 300bhp... The same guys also stuck a turbo on it and made iirc about 500whp on 'pump gas' on an otherwise completely unopened engine... I'm not suggesting that would necessarily stand up to race levels of bashing, but they certainly appear to be quite strong engines!!

I tried to hunt about for the 9krpm dyno videos but looks like they've all been made private now :(
 
Interesting. I've had advice not to increase the rev limit. Can't remember why - I think it was a Valvetronic or VANOS limitation. I know some people have deleted some of these parts, or locked the Valvetronic wide open. FWIW, 290bhp is as far as I want to go without pushing me up a class.
 
I had my old 3.0si remapped, with the rev-limiter raised to about 7500rpm. I had it dyno'd, and whilst the peak numbers were a bit iffy (247bhp IIRC), peak power was at 7,400rpm from memory, nice smooth line up to that point, which is the most important thing. Not sure if it was starting to tail off after 7400 due to the soft limiter these cars have but yeah mine did 15k and several trackdays with no issues, sold it on about 105k miles in the end, still going strong!
 
Thanks Ed, that's good to know.

Completed the MILVs fitting and ran the engine for a few minutes last night. Didn't throw any codes, and I didn't hear anything rattling about in the engine! It's booked back on the rolling road for a power run next Wednesday so we'll see what benefit this brings (without a tune).
 
Liam22 said:
see what benefit this brings (without a tune).

Good to hear no issues after fitting . Must have been a bit of a heart in mouth moment . Those results will be interesting to see as there seems to be some debate on whether you get any gain without the tune for the MILVs .
 
Rolling road says that the MILVs have cost about 5bhp across the board. Peak power is the same, but torque is down everywhere.

Racing at Snetterton on Saturday so will be interesting to see what it's done to vMax and if the ECU adapts during the day.

And still waiting for a refund from Superchips :thumbsdown:
 
Almost forgot you were going to be at Snetterton. I'll see if I can get there. That straight will certainly be a test of the engine power, though I think it's a little slower these days since they put all the new bit in. Not quite the same run at it.
 
Liam22 said:
And still waiting for a refund from Superchips

I cant seem to find your post about Superchips apart from this :" I also have a Superchips tune to try but wasn't able to apply it today." Would it not work ?
 
Well, I applied it and it was identical to the OEM map. I was then promised a new file which never arrived. I returned the PowerGate device last week.
 
[ref]Liam22[/ref], can't make it to see you on Saturday, sorry. Got one, possibly two viewings of the 2.5si I have for sale.
Good luck mate. Hope it goes well.
I'll be able to hear you from my house anyway.
 
Liam22 said:
Rolling road says that the MILVs have cost about 5bhp across the board. Peak power is the same, but torque is down everywhere.

Racing at Snetterton on Saturday so will be interesting to see what it's done to vMax and if the ECU adapts during the day.

And still waiting for a refund from Superchips :thumbsdown:

How much notice can you give regarding the races you'll be entering this season? Would love to come and watch but I'm in Scotland and have to really plan time off from work. Nice car by the way. :thumbsup:
 
This is my plan for the season but I don't commit to each race until 2-3 weeks before.

Code:
16-Apr	Clubsport Trophy	Snetterton 300
20-May	Clubsport Trophy	Silverstone GP
28-May	750MC Roadsports	Croft
25-Jun	Clubsport Trophy	Oulton Park
20-Aug	Clubsport Trophy	Brands Hatch Indy
25-Sep	Clubsport Trophy	Donington Park National
16-Oct	Clubsport Trophy	Silverstone International
 
Liam22 said:
16-Apr Clubsport Trophy Snetterton 300

That was so close . Kept up really well against the M3 engine . Great stuff :driving: :thumbsup:

For those that want to see the race view here from 5:47:00 . https://www.youtube.com/watch?v=6rjnABXAU3g
 
1536Z4 said:
For those that want to see the race view here from 5:47:00 . https://www.youtube.com/watch?v=6rjnABXAU3g
I must be doing something wrong?
Can't find Liam's race, just millions of minis and MX5s ?
 
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