My 2.7t sedan build, final questions (MS/electronic inqueries)

[Kozworth]

Here is the jist of my build.

'87 eta bottom end, 885 head and pistons. Refreshened, o ringed, stock hg with arp.

Turbo is a h1c replica, its an 8 blade (do not know the ar and forget the trim but its like 60 something on compressor side if i remember correctly), custom manifold adaptor with tial 38mm wg and the plain colored spring in a 50mm tial bov.

I am shooting for 350 whp adventually, but building to start on 7-8lbs at first. According to some sites, a 43lb injector is needed, such as the one on the ford 5.0l, any recommendations on injectors that are pretty PNP to install?

I am also looking to do the DIY autotune PNP ($800) because I do not have experience with soldering and wiring so I would rather have it simplified for me. I will be using a GM Map sensor, e36 TPS. I honestly have NO clue on how tuning works, so would this car be driving to get to a tuner or is there preloaded maps on MS, how would I get the car running on 7-8psi?

Since the car was an eta and the website says the PNP will not work with standard etas, would I have to swap out all the internal harness, or would can I use the harness that plugged into the standard oem PCM for the MS PNP? I assume already that I need to swap the IS engine harness already but just wondering about whats behind the dash.

I was also looking into ignition components and how necessary is wasted spark? I know its benifits, but budget is coming close. I figured would standard ignition be ok for low boost (<10psi) until I can offord wasted spark?

[sayed ali]

#42 Green top injectors are direct fit, Siemens injectors too..

As for the wasted spark you'll be fine with the stock ignition up to 1 bar or a bit more..

You can make 350whp on around 1 bar with a good tune, so no need for the wasted spark

[Kozworth]

looking for more input on the wiring harness and the tune, thanks for your info thus far

[Cyrix2k]

It will probably be easier to build your own harness vs swap to the late model harness and run PNP. For an eta, you need to run the 325i trigger wheel, VR sensor, and VR sensor bracket.

For wasted spark, you'll need more wiring - period. I recommend going with wasted spark since it's more reliable and provides a better spark. Total cost should be no more than $50 + the MS mods if you use junkyard coils which are more than fine.

[FLG]

Wasted spark wont cost much more and will be better down the line. Basically just a bit more wiring. I used an Accel "magnavox" coil pack from a turbo buick (imo should be more reliable than the regular GM coils) and works very well. Also just bought a make it yourself wire set from the local autozone (comes with wires, ends, and even the crimping tool) was about 40-50$

"TheShop" out in CT tuned my e30, good people and the tuner really takes his time with things. We were shooting for 20psi but my OE fuel pump just wasnt up for the task so we settled at 13psi or so and made 330whp if i remember correctly. Will be changing the fuel pump and heading back there soon.

Theres also maximum psi in jersey but after numerous phone calls and not a single call back i simply gave up.

With the PNP MS you should be able to drive to the tuner, just dont boost it until you get things sorted.

[Kozworth]

Looks like I am going to have to read up a lot on my crank sensor and such..

I keep reading a lot about running different chips and <30lb injectors w/ stock motronic, and to me that just seems to sketchy. But since I will only be going <10psi, and money is getting tight would this be a safe enough alternative? This car needs to be daily driveable by march, since my coupe will need to be inspected and there is no way in hell it will pass haha.

[sayed ali]

you can run more than 10 psi with a chip.. even 30lb injectors... and it's should be more than fine for DD

[Kozworth]

That's good to hear.

The original plan was to oring the block, but since I will only be going 10psi, would this seem to be overkill?

[sayed ali]

O-ring your block even with 10 psi .. and why not go above that? 0.8 - 1 bar are lots of fun

[Kozworth]

well since the car is going to be a daily and needs to be reliable, and probably going to stay on motronic for a while, I figured I wouldnt need to oring the block. However, if i popped the gasket and needed to oring in the future, I figured I could just pull the head and oring the head, that way I do not need to pull the whole engine apart since the head will be off already for the gasket.

[Exodus_2pt0]

Ostrich 2.0 is your friend.

I just got mine setup today and running, it is a chip emulator that allows real time tuning. Cost around $200 and gives you full control over the stock Motronic.

http://www.moates.net/

[FLG]

Imo go with a standalone. Your leaving so much on the table with motronic not to mention if you want to finally upgrade to a stand alone you've already wasted money and will just spend more in the end.

Sent from my Galaxy Nexus using Tapatalk 2

[sayed ali]

well since the car is going to be a daily and needs to be reliable, and probably going to stay on motronic for a while, I figured I wouldnt need to oring the block. However, if i popped the gasket and needed to oring in the future, I figured I could just pull the head and oring the head, that way I do not need to pull the whole engine apart since the head will be off already for the gasket.

Don't o-ring the head ;)

[Kozworth]

the cost of the war chip/miller maf is almost at the price of the mspnp... I think I am just gonna delay my project, I would rather have full control.

I am gonna look up tuning ms on an e30 but if anyone has any good read thrus lemme know thanks

[Exodus_2pt0]

http://www.e30tech.com/forum/showthread.php?t=98922 Ton's of info.