Supercharged E36 318is project with added Gto content.

Supercharged E36 318is project with added Gto content.

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Discussion

Richyvrlimited

1,826 posts

164 months

Monday 22nd August 2016
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jmflare said:
It'll be a push but it has been done before on an Mx5
An MX5 with an M45 blower will max out at around 210 - 220bhp, you can't get close to 300 with an M45. You'd you'd struggle to hit 300 on an MX5 with an MP62 too.

Percent

140 posts

98 months

Monday 22nd August 2016
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Nice stuff. Where did you get your fenders from? Is there any reason for not starting with a 328i as the base?

jmflare

Original Poster:

413 posts

142 months

Tuesday 23rd August 2016
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Richyvrlimited said:
An MX5 with an M45 blower will max out at around 210 - 220bhp, you can't get close to 300 with an M45. You'd you'd struggle to hit 300 on an MX5 with an MP62 too.
It can and has been done before, ported m45 tuned correctly with the right supporting mods. Like i said before i'd be happy with anything over 250 at the fly which i think is possible.

jmflare

Original Poster:

413 posts

142 months

Tuesday 23rd August 2016
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Percent said:
Nice stuff. Where did you get your fenders from? Is there any reason for not starting with a 328i as the base?
Thanks mate. I prefer the 4 pots, and some guy in wales makes them, Unique Customs i think smile

geeks

9,204 posts

140 months

Tuesday 23rd August 2016
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jmflare said:
yes quite a fair bit, i'm hoping for under 1150kg. Even when supercharged my 4 pot should weigh quite a bit less than if it had a 6 pot but put out quite a bit more power. I worked out the weights differences at one point but don't have the figures to hand. The main thing is I'm much more interested in building this 4 pot up than just slinging a 6 pot in, i have a e36 328 lump sat on my driveway at the moment if anyone wants one? biggrin
You'll be pushing it to get it down to 1150 I reckon! Also if I read correctly earlier you are having the head skimmed? If so be careful the M44 engine CR raises significantly with even a small skim of the head, on your build this will be a problem. Also I would be worried about your bottom end and pistons/rods at 250BHP!

I have been looking at a GKD kit for mine with an Eaton blower from a Mini but with a more modest aim of 200BHP on standard internals.

Richyvrlimited

1,826 posts

164 months

Tuesday 23rd August 2016
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jmflare said:
It can and has been done before, ported m45 tuned correctly with the right supporting mods. Like i said before i'd be happy with anything over 250 at the fly which i think is possible.
Not on an MX5 it hasn't, not even close!

jmflare

Original Poster:

413 posts

142 months

Wednesday 28th December 2016
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Well the BMW hasn't really evolved since my last post really, shes been sat there while i've been doing my GTO. I really need to get started again but struggling with funds to do them both :/ So on to the GTO...

This is her before i really started, having been sat on my drive for 7 months while i've been doing the bmw, figuring i really needed a daily for when i got my licence back i decided to get her sorted.



I took the entire interior out, the car has clearly been in a flood at somepoint a long time ago, dried silt everywhere but no typical flood car symptons, condensation, damp smell etc.. I cleaned her up getting rid of all the silt and also checked all the wiring for corrosion but it all seemed good luckily. Got a new carpet for her and she started to look quite smart. Replaced any damaged trim pieces and fitted a nice Pioneer headunit too...



Next up were some buckets because I'm young and my back is in good shape atm so why not... Sparco' finest entry level Sprints, insanely comfortable and supportive for the price. Welded myself up some frames and got them in, perfect fit for me at 6ft2 but my 5ftnothing gf cant see over the dash biggrin



Next up i removed the struts to fit some Tein S-tech springs and well this is where it all started with this car... While i had it apart i though about how much i wanted a manual so thought why not and proceeded to remove the engine to get the gearbox replaced. This is when i also decided that the AWD had to go and that RWD was the way forward. So i needed lots of parts cue this thing being dumped on my mums drive, she was estatic...



A 1992 Twin turbo that had seen better days, got down to stripping it of its limbs, engine out gearbox and any other twin turbo bits off then the engine lobbed in the boot. All very 3.14Key... I would also learn later on that due to rear outer hub splines being smaller on the N/A that i would also need the entire rear subframe assembly that weighs approx. 3 million tons. Sadly once i had canniblised it i had no room to store it so it was scrapped :/

I took the box apart and welded the central diff, also removing the front shafts too. This locks the torque split to 50/50 and theres no resistance at the front so 100% of the power goes through the t-case to the rear smile

At this point i was slight over just fitting new springs which was the original job so thought that it'd be rude not to twin turbo her too...

So i started fitting the turbos i sourced ff a club member(the doners were a bit buggerred, more shaft play than a bangkok brothel), quite a few mods are need to get stuff to fit, engine mounts are all different, turbo oil feeds need take off adapters, i planned to use the TT oil pan but that didnt fit the TT block so i had to weld some tabs to the N/a pan for the turbo drains. I also replaned the Stem seals, hydralic lifters, timing belt and some other stuff while it was all out...



Once that was all done i threw the engine back in and started connecting everything back up, i also replaced the engine wiring harness too as the TT is slightly different to the N/a, another thing salvaged from the doner...



I also ordered a flash ecu from America at this point, allowing me to directly edit the fuel/timing tables rather than faf around with fuel controllers and maf translators, the flash ecus are TT ones so would technically run the car straight out the box. It also has other features such as Launch control, Flat shifting etc..



Skipping aheadabout 3 months, im current waiting on parts to arrive. I've upgraded the fuel pump and hotwired it. New oil cooler and custom lines. Lots of interior work. Made myself a custom intercooler fogger. Straight 3 inch turboback exhaust ready to be welded up and fitted. Methanol injection on order and lots more that i cant remember. Lots of gauges in the post too. The only downside to this are i have my uni exams next week and will be itching to get down to the garage when i should be revising... :/






I'm aiming for 380hp+ out of the stock 9b turbos which is quite a challenge considering stock they were 'supposed' to be 276hp but i do have the 10:1 n/a block on my side.

I've missed quite a bit out but starting to write this at 5am was bad idea. I'll fill in the blanks tomorrow if anyone is interested smile

Thanks Jonni


ThrottleBod

258 posts

150 months

Wednesday 28th December 2016
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Well that got a bit out of hand!

Fair play that's a lot of work, looks like it will be a lot of fun.

jmflare

Original Poster:

413 posts

142 months

Wednesday 28th December 2016
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Thanks, yes it should be quite a handful biggrin

A few modifications i forgot to mention:

- Welded up rear differential, heard the original viscous LSDs were a bit limp.
- 560cc Evo injectors on order, cleaned and flow matched.
- A set of Nankang NS2Rs semi slicks, have heard nothing but good things about these, gone for the 180 tread smile
- I removed the rear steer system while i was swapping subframes as i'm not a fan, lost quite a bit of weight, new custom rear toe arms.
- Braided fuel line inbetween fuel rail with pressure take off for fuel pressure gauge also one on the oil cooler to gauge oil pressure.
- AEM wideband kit with output hooked up to the ecu so i can log AFRs. Also seprate Map sensor hooked up to ecu to log boost even if the ecu isn't currently able to tune directly from it.
- My favorite modification a KITT light at the front that turns me into Micheal Knight... Looks awesome (if a little cheesy). Weird i got more excited seeing that working than seeing the engine back in... biggrin

Any other GTO people on here? People seem to have this idea that they are really hard to work on and unreliable but that couldn't be further from the truth. In all honesty i'd say its an easier car to work on than the E36 and that is already a well laid out and logical car to work on.

The next real issue once it's tuned and running is the transfer case and rear output shaft in the gearbox... Standard torque split is 50/50 and standard torque is around 310ish so in a crude way that means the TC and output shaft is normally used to 150ft/lbs. So i've doubled the torque on the TC and output, no biggy it's been done before so hopefully should be okay. Now throw into the mix the increase to 500ish ft/lbs i plan, The welded rear diff effectively doubling the grip at the rear and the sticky 255 track tyres and i have the perfect storm in terms of exploding the tranfer case :/

I plan to remedy this with a hardened output shaft and also welding up an outer cage for the TC to give it more resistance to forcing itself apart... The rear diff and subframe etc. should hopefully be okay, it's a seriously beefy setup back there as standard...

One day i hope to rotate the engine 90* and use a gearbox from a shogun or something but for now this has to do.

Jonni



Edited by jmflare on Wednesday 28th December 17:47


Edited by jmflare on Wednesday 28th December 18:05

anonymous-user

55 months

Wednesday 28th December 2016
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Surely its a waste having good tyres on the back? The welded diff chirping will chew them up before long?

jmflare

Original Poster:

413 posts

142 months

Thursday 29th December 2016
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I'm assuming the constant scrubbing would have an effect. I ran a welded differential on the E36 for a year driving it every day though and tyre wear wasn't too bad.

That being said i have decided i will actually be running cheaper NS2s 255/40 on the rear and the NS2Rs track tyres on the front in 235/45.