35i Track Weapon Build Thread

[huseyin88]

If you can keep a double the bhp 35is out of the kitty litter on track you're a better man than me my friend...!

Reminds me of the RS 500 touring cars, too much shove at 560hp for the chassis even with a heavily modified rear beam and on slicks etc, they were all over the place.

Good luck if you go ahead, I'd def come and watch.

those rs500's had 205 tyres of something right.. so hardly any grip for what its running..

looking to try get 12j rears and 10.5j fronts like what the 911 gt2 rs runs.
the apex ar8 wheels i had initially hoped for only go up to 11j so may even have 11j rear and 10.5j front which should help a lot from the oem 8j front and 9 j rears. i think thats what they are.. plus with some good tyres and body panels adjusted for them and a half cage of sorts should be good.
flat floor with a functional tunnel, decent front splitter and rear diffuser + wing.. all adds up on track

Irony is the 11j apex ar8 wheel is lighter than my 9j wheel

I guess if i do get to even 600 and with all the aero and weight saving mods and find its way to savage can call it a day there.. at least the rest of the car will be built for 700 and i know i can run it all day long without worry

[huseyin88]

How old / how many miles has the base car done?

Car is an 09 plate with around 67k or something on the clock.

[huseyin88]

I generally use carley and BMW pro tools for codes on my phone with inpa/ispa on a laptop for when im at home.

Considering purchasing the MHD logging before Donnington on 9/12/2021 as that may help things..

I've seen codes come up for boost solenoid issues but then others saying that its normal on a stage 2+ map on MHD... so not sure.. have you heard anything previously from anyone of them failing and causing limp modes?

Regardless will need the cooling anyway so planning to tackle that first and then continue to digress more in to it.

Havent come across xhp before, seems like something similar to MHD form what i can see? does it have any benefits over MHD?

Regarding clutch packs haven't looked much in to them but noted for when the time comes
Otherwise looking at mtech flywheel or a 35is one as its lighter than the 35i one when addressing those areas in one go.

Just found some articles from "Asbjorn" on z post about the csf rads.. not being sufficient on their own.. i know hes done a lot of good work on his build so may consider looking in to that as well.

xHP is for the transmission, MHD is for the engine.

Without data logging it's hard to tell if the codes are related to bad boost solenoids or just the map controlling boost poorly.
The VANOS code would worry me though, those can be caused by the cam ledges wearing down. Mixture control can also be an indicator of fuel problems like bad injectors.

Noted, only done 67k so wouldn't of expected cam bearing edges to be leaving groves but i guess this is one of things down to how its previously been maintained.. but fair point.

Once I get cooling done, if the issues not resolved maybe looking at injectors then cam ledges together as i think you need to take injectors out so can do seals same time.

only worry is i dont have the tool for it so could just do it super slow and tighten little bit at a time.

[huseyin88]

I have 534 hp and drive a lot on the track and there are no problems with the dtc. An additional engine oil cooler has been added and as an oil I use a VR1 Racing 5W50.

O good stuff, what engine oil cooler do you use if you dont mind me asking?

[john-e89]

There was a guy on here called Twin Turbo used to track his white, ironically 28i single turbo if I remember correctly, could've been a 35i though..... Anyway he got some good sprint times and his car was only cooking. Maybe have a look using the search facility of you're interested.

[R.E92]

I generally use carley and BMW pro tools for codes on my phone with inpa/ispa on a laptop for when im at home.

Considering purchasing the MHD logging before Donnington on 9/12/2021 as that may help things..

I've seen codes come up for boost solenoid issues but then others saying that its normal on a stage 2+ map on MHD... so not sure.. have you heard anything previously from anyone of them failing and causing limp modes?

Regardless will need the cooling anyway so planning to tackle that first and then continue to digress more in to it.

Havent come across xhp before, seems like something similar to MHD form what i can see? does it have any benefits over MHD?

Regarding clutch packs haven't looked much in to them but noted for when the time comes
Otherwise looking at mtech flywheel or a 35is one as its lighter than the 35i one when addressing those areas in one go.

Just found some articles from "Asbjorn" on z post about the csf rads.. not being sufficient on their own.. i know hes done a lot of good work on his build so may consider looking in to that as well.

xHP is for the transmission, MHD is for the engine.

Without data logging it's hard to tell if the codes are related to bad boost solenoids or just the map controlling boost poorly.
The VANOS code would worry me though, those can be caused by the cam ledges wearing down. Mixture control can also be an indicator of fuel problems like bad injectors.

Noted, only done 67k so wouldn't of expected cam bearing edges to be leaving groves but i guess this is one of things down to how its previously been maintained.. but fair point.

Once I get cooling done, if the issues not resolved maybe looking at injectors then cam ledges together as i think you need to take injectors out so can do seals same time.

only worry is i dont have the tool for it so could just do it super slow and tighten little bit at a time.

At 67k it's very unlikely. You don't need to remove injectors to get valve cover off so best to leave that job until you run out of other diagnostic options.

I would focus on getting the car tuned well and having a good look at the logs. Fuelling issues can kill an engine quickly so making sure your AFR is on target and trims and in check is the most important step. MHD OTS tunes are OK for stock cars but you'll need a proper custom map once you add inlets and larger turbos.

[huseyin88]

yeah, I didnt think 67k would of caused it either, but im no mechanic so.....

Sorry for some reason in my head i had that injectors need to some out as well :/

Cool beans, yea leaving those bits till end would work out best for me as I could always check lifters as well at that point once a few more miles are on there.

Just purchased the MHD logging license so will get some data in December when I'm at Donnington and take it from there.

Btw really appreciate the input and help

[R.E92]

I'd get a log before going on a track. If you're injectors are leaking or the engine is running lean because the fuel pumps are stuffed then you really want to know about it before pushing an engine. You can do a lot of damage very quickly when running too lean.

[huseyin88]

I'd get a log before going on a track. If you're injectors are leaking or the engine is running lean because the fuel pumps are stuffed then you really want to know about it before pushing an engine. You can do a lot of damage very quickly when running too lean.

The limp mode only comes up after doing 3-4 heavy laps and temps have gone up.
Also when weather was colder on my last track day car seemed to of lasted that little bit longer.

I would of though if it was any of the above that would of kicked in from the first heavy lap if not first WOT or two as faulty pump or leaking injectors would show signs straight off the bat or at least after a warm up lap at a circuit like snetterton or donnington.

[Miyli]

I have 534 hp and drive a lot on the track and there are no problems with the dtc. An additional engine oil cooler has been added and as an oil I use a VR1 Racing 5W50.

O good stuff, what engine oil cooler do you use if you dont mind me asking?

Mishimoto https://fullcartuning.com/60716-mishimo ... K8EALw_wcB

[Miyli]

I'd get a log before going on a track. If you're injectors are leaking or the engine is running lean because the fuel pumps are stuffed then you really want to know about it before pushing an engine. You can do a lot of damage very quickly when running too lean.

The limp mode only comes up after doing 3-4 heavy laps and temps have gone up.
Also when weather was colder on my last track day car seemed to of lasted that little bit longer.

I would of though if it was any of the above that would of kicked in from the first heavy lap if not first WOT or two as faulty pump or leaking injectors would show signs straight off the bat or at least after a warm up lap at a circuit like snetterton or donnington.

The car is to go into limp mode as oil temperatures rise above 140 degrees Celsius.

[huseyin88]

There was a guy on here called Twin Turbo used to track his white, ironically 28i single turbo if I remember correctly, could've been a 35i though..... Anyway he got some good sprint times and his car was only cooking. Maybe have a look using the search facility of you're interested.

Pulled the plug last night and bought the SSP DCT kit with a CSF rad and Mosselman thermostat.

I'd get a log before going on a track. If you're injectors are leaking or the engine is running lean because the fuel pumps are stuffed then you really want to know about it before pushing an engine. You can do a lot of damage very quickly when running too lean.

The limp mode only comes up after doing 3-4 heavy laps and temps have gone up.
Also when weather was colder on my last track day car seemed to of lasted that little bit longer.

I would of though if it was any of the above that would of kicked in from the first heavy lap if not first WOT or two as faulty pump or leaking injectors would show signs straight off the bat or at least after a warm up lap at a circuit like snetterton or donnington.

The car is to go into limp mode as oil temperatures rise above 140 degrees Celsius.

Yeop, its just the other fault codes that come up in the logs which caused some worry.




Will try and get the VAC motorsport baffle for the engine sump along with an upgrade to the oem oil cooler on right side behind bumper. Can do that all in one go seeing as it would make it easier if i flush coolant and oil when doing the thermostat upgrade.

I'll measure up that oil cooler and find a nice CSF one or something that will fit down there + lines and everything else.

Seems a common mod on the N54's anyway.

I'll get some picks up when i get a min and figure out how to upload on here... i think form memory i need a photbucket account or something..

[B21]

Interesting article on Spoolstreet where the ultimate techies hang out , on cooling management..enjoy

https://www.spoolstreet.com/threads/n54 ... -use.4352/

[Miyli]

I added Mishimoto alongside the original and I ordered oil hoses of my own dimensions.

Mishimoto.jpg (49.6 KiB) Viewed 570 times

Here's a link to my log too. https://datazap.me/u/mikyli/log-1619594 ... 0-11-12-22

[Miyli]

Dragy measurement km/h

Dragy.png (51.48 KiB) Viewed 566 times