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Mezevenf
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4500rpm cutout!

Post by Mezevenf »

Hey guys,

Ran into a problem, when the tacho reaches 4500rpm it just drops right back down to nothing until it comes under 4500rpm again.

Any ideas whats causing this?
Bernard M (AKA Mef - Mezevenf)

1986 75QV 3.0L 24v V6 - Silver
1985 GTV6 2.5L 12v V6 - Red
1999 166 3.0L 24v V6 - Red

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Barry
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Post by Barry »

:D Rev limit
:) Trigger signal filtering
8) and my favorite-using an ign. module from a VW,OPEL,VAUXHALL that is intended originally for a 4 cyl.You now use it on a 6 and the 4 cyl rev limit (6000rpm) now comes in at 4500 on the 6 cyl.Fun.
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ar4me
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Post by ar4me »

Bernard,
Sounds like the engine is running fine, and that it is only a tach readout issue, right?
Do you have the GoTech Pro? I assume so. When Joe (from GoTech) was up in Seattle tuning the 3.7 he told us that the tach output of the GoTech Pro (on my 3.7), most likely would not drive the Milano tach, or drive it well. He said it would only take an inexpensive, readily available, "converter?" to put inbetween. However, we hooked it up straight and it seems to work on the 3.7. Anyway, a convoluted way of saying that you may need that "converter?". Either post on the GoTech forum or ask GoTech directly.

How is it running??????
Jes
87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
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Mezevenf
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Post by Mezevenf »

Its running well, but the tappets are *very* loud.

Booked in next week for a tune just to get everything sorted.
Bernard M (AKA Mef - Mezevenf)

1986 75QV 3.0L 24v V6 - Silver
1985 GTV6 2.5L 12v V6 - Red
1999 166 3.0L 24v V6 - Red

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ar4me
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Post by ar4me »

Pics, sound clips, video? We want to see, hear, touch, smell,... don't want to taste, though :roll:
Jes
87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
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Mezevenf
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Post by Mezevenf »

Ok since you asked ;)

I will be making a dedicated thread once everything is done.

Short video
Attachments
Need a cam belt cover.
Need a cam belt cover.
24v1.JPG (102.69 KiB) Viewed 14043 times
Large filter, I know.
Large filter, I know.
24v.JPG (105.99 KiB) Viewed 14043 times
Where the magic begins ;)
Where the magic begins ;)
alfaseat.JPG (59.28 KiB) Viewed 14043 times
Bernard M (AKA Mef - Mezevenf)

1986 75QV 3.0L 24v V6 - Silver
1985 GTV6 2.5L 12v V6 - Red
1999 166 3.0L 24v V6 - Red

NightSpec
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ar4me
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Post by ar4me »

Nice! Congrats! And, thanks for posting. Get that thread up!
Jes
87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
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fedezyl
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Post by fedezyl »

Hey Mezevenf, where did you get that intake manifold from? seems to be converted from the 164 24v one, i'm interested in that for my V6 conversion
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Mezevenf
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Post by Mezevenf »

The whole engine came from Glenwood Motors in SA, few things had to be modified to get everything sorted and fitting nicely.
Bernard M (AKA Mef - Mezevenf)

1986 75QV 3.0L 24v V6 - Silver
1985 GTV6 2.5L 12v V6 - Red
1999 166 3.0L 24v V6 - Red

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junglejustice
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Post by junglejustice »

Bernard, sounds like the rev-limiter is set to 4500 RPM... Is it jus the tack that drops or does the whole motor loose power and shut down until the revs drop below 4500...?
...to Alfa, or not to Alfa? That is the question...
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Mats
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Post by Mats »

Sounds like one tappet isn't filled properly, let it idle until it's all warm (oil viscosity drops) and see if that solves it. Usually you get this when building a new engine, should be fine.
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
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Mezevenf
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Post by Mezevenf »

JJ - It's just the tacho that cuts out, engine still goes past 4500rpm but I cant tell how far ;) Dawie responded telling me I just needed some adaptor for the GoTech, can you supply said adaptor?

Thanks for the tip Mats, will see.
Bernard M (AKA Mef - Mezevenf)

1986 75QV 3.0L 24v V6 - Silver
1985 GTV6 2.5L 12v V6 - Red
1999 166 3.0L 24v V6 - Red

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ar4me
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Post by ar4me »

Bernard,
That sounds exactly like what Joe (from GoTech) described to us re. the 3.7. It should then be readily available, and it is probably much faster for you to pick up locally.
engine still goes past 4500rpm but I cant tell how far
Hook up the GoTech ECU to a laptop and you can see the RPM there. Obviously you need to install the software on the laptop first.
Jes
87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
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4agedub
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Post by 4agedub »

Hi
You might need a Gotech tach adaptor for the specific tacho meter... or the tacho might be faulty.
Gotech fuel injection systems
South Africa
Tel: +2711 3978197
Email: louis@gotech.co.za
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