EFI Conversion - 4 Cylinder GTV - GoTech Pro, Coil-Packs & ITBs;

[junglejustice]

Fired her up tonight - sounds like we are on the right track... I'll post more details and pics later - working hard to get this one sorted right now...

[Biba69]

Jungle, just letting my fingers do the walking I went to a MegaSquirt dealer's site. I gather that is 'product' you're referring to when you commented, "(The arguments for and against the build-it-yourself MS systems are legendary here, so we won't go there again...)." I could see where it 'might' be fun...if someone is an electronic genius.

I also tried to find the BattleBug system but the only reference to it was this thread. Expen$ive doesn't appeal to me, but this does - "This is a fully-programmable, professional, stand-alone engine management system - complete - turn-key!"

To repeat, I'm merely kicking tires at this time, but I do want to know what is available, along with costs, and ease/difficulty of installing.

Congratulations for getting the GoTech / nord engine running.

Biba

[BattleBug]

Biba,
I'm not a 'system'! Tho' I am interested in ditching my L-Jet for something I can build/use/modify on my own (& you don't need to be an electronic genious with MS)

JJ- For an otherwise stock motor-perhaps previous Ljet-what does this system offer over MSII? What features, tunability, flexibility, etc. justify $900?
Not flamin' just curious?

[junglejustice]

For****sakes dude! With all due respect - I clearly said that we were not going to go there again in this thread! (I'm sick of the arguments that build up over bull**** - just because somebody with an agenda comes along and hijacks a thread...!)

Quote:

Originally Posted by junglejustice BattleBug, if purely price is what you are after, this system is not for you. This is a fully-programmable, professional, stand-alone engine management system - complete - turn-key! (The arguments for and against the build-it-yourself MS systems are legendary here, so we won't go there again...)

[BattleBug]

...so how's it going? I'm still intrigued. Especially interested in before & after comparisons WRT engine output, emissions & economy.

[junglejustice]

Paul, sorry - late night last night!

Generally annoyed with GoTech threads that seem to somehow turn in to Megasquirt comparison cluster****s...! (A bit of both actually!)

Somebody should start a thread comparing the two if it is really that important (not hijack a step-by-step installation thread about one system in particular) - preferably somebody who cares, or somebody who really wants to know! People often want to compare price, rather than effort, quality, time invested, support, functionality, development history of the product, flexibility, installation and tuning time, or the many other factors that should play a role in the decision for such a system...

As far as I know you need to either source all of the components and build it yourself (solder parts together etc etc) or have somebody build it for you (many vendors offering to do this.) Seems a bit silly when a turn-key solution is right there in-front of you - today - available for peanuts (relatively speaking - the way these things go...)

I don't sell MS, I don't "play" with it, I don't use it and my only experience with it was a VERY bad one. The shop - G2 - was taken for a HUGE and expensive ride by just one of these people pushing these systems and who offer to build it for you (he posted here and even had the balls to claim victory sold one to another member here!) Hence the reason when you mention MS - I see RED! 1600 dollars to build the MS and install it and another 2,000 dollars to tune it for them! - This, a car that we had ALREADY converted to T-bodies (and the Redline-Webber software system) and drove to the crook's shop!!!! And it ran like CRAAP on MS (with this huge stupid bazooka box at the passenger's feet!)

WTF!? MS - forget it. It's not even a fair comparison (not the same thing really - ) If it were, why not compare it to Autronic, or SDS or whatever? I don't see folks ask the more relevant question: "...what do you get for the extra 3-4-5,000 dollars of a Motec?"... Why not? Seems like a larger disparity in price there to "justify" - no!?

Output tests were posted before; ' 74 GTV made 90 to 95 at the wheels before the GoTech and T-bodies and now makes 110 to 115 consistently after the conversion from SPICA (on the same dyno.) Throttle-response is up immensely and it sounds awesome! Torque is also way up!

A stock 20-year old 3.0 12 valve making 140, 145, 150 at the wheels now makes 180 at the wheels with headers and slightly larger intake plenum and runners as the only other modifications! (The key on Motronic and L-Jet cars is that the conversion allows you to drop the restrictive AFM - greatly contributing to further gains! )

Fuel economy? People hunting for power "should" not care!? (There HAS to be some compromise - the laws of physics demand it!) Once the system is tuned right and your mixtures are accurate, you CAN'T make more power on less fuel! (The assumption being that you are running higher compression pistons, more cam, bigger headers etc - all requiring more fuel to realize the full potential of your motor!)

If you want fuel economy, buy a Prius - not a GoTech/T-body conversion! In any case, few here will use their converted 65-69-74 GTV/Spiders as a daily driver! The ones that we have done aren't being used that way either, so it is hard to say what happened to the fuel economy!? (Can't really use data from sporadic, spirited weekend drives as a base!)

Emissions, in theory you now have a much better chance of passing smog-testing! The engine can be leaned out and provided that you run closed-loop and the O2 sensor(s) activated, with cats installed, it should be all good. I know of at least one V6 car with GoTech that passed in California.

[junglejustice]

We still have to do some wire-routing clean-up, but here are some updated shots of the coil-packs and plug-wires, one coolant port blocked of and the rebuilt radiator installed! (We'll come up with something better and more permanent for that one coolant port!)

Then, we also tried something different on this ' 72 GTV from what we did on the shop-owner's ' 74 2000. What we did on the previous installation is to run T-vacuum lines "in serie" originating at the last ITB (furthest from the ECU) and connecting via a "T" to the one next to it and to the next and so on - closer and closer to the fire-wall.

The last one Ts in to the back of the GoTech MAP sensor!

With this one we did a quick and dirty PVC balance-tube with 5 ports on it (one for each ITB in and one out-put to the GoTech ECU. Can't really say that we notice a difference one way or another since this car has not been dyno-tuned yet. That comes next! Once we ca conclusively say that it helps in some way, we will likely fab up a nice little welded aluminium box or something!

The brake booster is still connected via the check-valve port on the rear of the head!

[junglejustice]

As a side-note; you can either go with the less-expensive, base-model GoTech Standard (at 700 including the harness) and keep your stock distributor! You would convert it with a Hal-sender and just run coil-fire direct via the stock coil (or a single after-market coil - as pictured here...)

I run that way on my 12 valve 3.0 daily-driver for almost 3 years now! Trouble-free!

Also, this set of 4 individual coils with the GoTech Standard and a single-coil setup (as pictured here) is for sale or the ITBs with a GoTech Pro, harness and dual-coils with the 60 minus 2 (60-2) crank-trigger setup!

Give me a buzz at 425.941.4747 and we can talk some more about it, or email me at info@glenwoodalfa.com

[junglejustice]

Some more shots...

[BattleBug]

JJ-
Any updates?

[hughqv]

Cool write-up, interesting read, thanks!

[slyalfa]

^
|---Which coil is this? And what is the charge time. It looks better then the Accel ford type I used.
The ford typs is a pain only due to the ford connectors that cost half the price of the coil and the need for ford spark plug wires.

[Trav]

Very interesting, will this system work with plug mounted coils? What are the benefits/drawbacks between the COP and the coil you show?

Thanks

[slyalfa]

Trav do you know of a COP that would fit a nord 4cyl?
COPS fit the V6 nice but I do not see how you could ever put one on a nord.
CNP might work if you made some sort of brackit.


here is a VAG COP on a nord. see no way to mount it and you would need to drill holes in the hood..