ALEX P

Very nice Rob. Well done for taking the plunge.

There a few of the IB guys doing a quick dyno run tomorrow morning reasonably close to you:

http://www.evolveautomotive.com/rolling-road-dyno.php

There's only about 8 of them so happy to hook you up if you have a spare couple of hours to get your baseline / before and after numbers.

http://www.impactbumpers.com/forum/i...yno-day/page-5

Mikke_Possu

Very interesting Rob. Thanks for sharing this. Looking forward end results.

robt964

I'll have to pass but thanks for the heads-up. It's my wife's birthday weekend and I'm already spending Sunday at 'Classics at the Castle'. It wouldn't be fair to start her day in a loud tin shed engulfed in exhaust fumes

ALEX P

No worries, just a thought.

Sounds like a great way to spend a birthday to me - Chicks huh!!!

neffets

dumb question maybe but if i google the injectors you got they turn out to be dual spray wide cone(split cone) which are meant for 4valve heads that have a bridge inbetween the two intake valves.
Shouldn't our 2v head use singel cone spray in order not to wetten the intake walls?
http://www.nsxprime.com/photopost/da...pray_types.jpg
http://www.usrallyteam.com/index.php...ex&cPath=10_44

robt964

What's the p/n of the injectors you have?

No such thing as a dumb questions. It's an interesting point, and one I'll certainly look into further.

I'll try and find a datasheet for them. We'll need to know the spray angles and distance between tip of injector and back of the valve to decide if there is the potential for an issue.

robt964

Awesome - found the patten data in the xls here

Just need the p/n from hi-wind now to assist with the comparison

neffets

If it's the green giants then they are also split cone
http://www.ctsturbo.com/cart/product...or-256-20.html

I'm looking for injectors for a similar project, looking through the tables I can use VW golf G60 injectors and Audi S4 (AAN)&S2

robt964

Yeah it could be them 'big green' or 'green giants'.
As you say, from the data I've found the pattens and angles are identical to the injectors I have. Do the injectors you've identified have a bosch part no? Attempting to identifying parts by vehicle is a non-starter.

neffets

you can use the excel sheet and sort the injectors by angle etc

These are some injectors i have lying around

Type
C=singel spray
E= dual spray
A=disc/ pintle (OEM old school)

So if stock spray 21degrees, I have 19,25 and 27 to choose from

HiWind

Apologies Rob .. missed that over a busy weekend .... Bosch p/n 0 280 155 968 ... Looks like 4 holes vs the single hole stock injector

recent thread on other 964 injectors

HiWind

Nicely done Steffen ... Those are they ... Might the split (different to stock) pattern be a problem?
I've based my choice on a very similar 3.8 964 hot cam itb race engine which has achieved great results with my Dicktator fuel mgmt system (not motec,I know)
... So while I'll likely lose fuel efficiency, I think seat o pants results shd be good

robt964

So on Tuesday evening I dropped the ECU into the car and got things plumbed in. Cranked the engine and the darn thing started first turn of the key The idle was high at around 1200 rpm but I thought I'd just watch the wideband until things got warm before going off and adjusting anything.

3-4 mins later, I gently opened the throttle but the engine would stall out immediately if you opened it with any kind of pace. A quick conversation with Specialist Components the next day revealed I'd plumbed the MAP vac line down stream of the one-way-valve that sits on the plenum. So lastnight I moved it to the correct position (up stream) and tried again. Sorted - We now have throttle control again.

The idle was still high and on checking the idle control map vs temp it was clear why. The usual 900rpm idle speed wouldn't be achieved until after 70degrees. Before then, the target was much higher.
The engine had always happily idled at 900rpm regardless of temp so I pulled the targets down much lower. Starts and idles just like it did with the motronic now.

I then took it for a gently drive around the block. Nothing conclusive can be drawn from that yet since I was pootling along in 2nd on light throttle. It was then I noticed that the rev counter wasn't working. I'd been ignoring the dash and staring at the laptop screen until now. Connectivity checked out fine but I recon this is a config issue as some of the settings relating to the tacho looked suspect. I'm sure the guys will ping me back with the answer this morning.

The softwares' a little quirky (isn't all software thats designed by engineers?) but its ok. Just like all the other varieties you have to learn/remember where everything is. There are a few things I spotted right away that I'll pass on to them. I bet they designed and ran this software on regular dimensioned monitors. Laptop screens have a different aspect ratio and as a result some screens don't render cleanly. Nothing a few extra scrollbars can't sort out.

So there we are - At first base with very little drama
I'll toy with it for 2-3 weeks and then get it onto a RR for a mapping session. I'll probably take the car upto Specialist Components and use theirs.

jevvy964

Good work Rob, sounds promising! Many happy hours tinkering ahead

dave964diver

Nice Rob, I'm seriously considering pulling the trigger on this kit. Waiting for your rnd mind