taurran : "Testing new waters" with the Turbonetics ST
#1361
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We just finished dynoing one of our Porsches and it had some choppiness up top also. We found out that the spark plug gap needed to be closed a bit and we were blowing out spark. This was noticable due to a dip in the air fuel towards rich at the same area as the choppiness. We also started to fall on our faces horsepower wise at this area in the power band.
Just a suggestion.
I would take your plugs out and see if you can visually see detonation and maybe check the gap on them.
Good luck.
Just a suggestion.
I would take your plugs out and see if you can visually see detonation and maybe check the gap on them.
Good luck.
#1363
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Originally Posted by Quamen
We just finished dynoing one of our Porsches and it had some choppiness up top also. We found out that the spark plug gap needed to be closed a bit and we were blowing out spark. This was noticable due to a dip in the air fuel towards rich at the same area as the choppiness. We also started to fall on our faces horsepower wise at this area in the power band.
Just a suggestion.
I would take your plugs out and see if you can visually see detonation and maybe check the gap on them.
Good luck.
Just a suggestion.
I would take your plugs out and see if you can visually see detonation and maybe check the gap on them.
Good luck.
I'm not even sure what they're gapped to right now. I'm just running the utec and no DLI so spark may be kind of weak. Jeremy had previously suggested before running a .022 or so which is almost half stock gap.
Thanks!
#1365
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Originally Posted by taurran
You know what? That's the first thing that the local tuner suggested last Saturday after it was dynod... I'll definitely add that to my list of things to do.
I'm not even sure what they're gapped to right now. I'm just running the utec and no DLI so spark may be kind of weak. Jeremy had previously suggested before running a .022 or so which is almost half stock gap.
Thanks!
I'm not even sure what they're gapped to right now. I'm just running the utec and no DLI so spark may be kind of weak. Jeremy had previously suggested before running a .022 or so which is almost half stock gap.
Thanks!
I would definitly look into it. It is about the cheapest and quickest thing that you can do with minimal time. When we did it to our Porsche we significant saw horsepower gains and this was only at four pounds of boost (keep in mind this is an 1985 lol).
Here is the intial dyno with stock gapped plugs. You can see power flatten as the A/F dips down which is when spark was blowing out. One thing I noticed is that this SC comes on way harder than the previous SC brands we have used due to the impeller design. That seemed to have a significant impact on our gapping technique compared to previous supercharger systems we have built for Ferrari and Porsche.
![](http://www.928motorsports.com/parts/images/32vstage1/beforeandafter.jpg)
#1368
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Originally Posted by taurran
Yep, I have been considering this. Any idea of the turnaround time on this?
This link claims 3 days. I would give them a call and let them know your builder thinks your brand new 750's are giving trouble - and ask them to test them for you at no charge. Either that or swap you out a new set (they are all flow tested individually).
#1369
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Originally Posted by IIQuickSilverII
hopefully its that.... btw nice to see an SAE 0 correction DJ sheet ![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
You can actually see pictures of the car in my Z33Art thread (sorry for the OT).
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suscribing...
I had this same issue ( sounds like BBs Pinging) after I had my TN setup Tuned with a UTEC. Could never really figure out what it was. I changed fuel setup and everything. Happened only under high boost. I then returned to my Tn fuel setup and ran the flash (no utec) and the noise went away :/ ??? GL with solving this Craig
I had this same issue ( sounds like BBs Pinging) after I had my TN setup Tuned with a UTEC. Could never really figure out what it was. I changed fuel setup and everything. Happened only under high boost. I then returned to my Tn fuel setup and ran the flash (no utec) and the noise went away :/ ??? GL with solving this Craig
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Originally Posted by 98MODMTR
I remember that noise....
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Originally Posted by carrera4s
What tire size are you running in the front 255/40/18s and back 295/35/18s? What wheel width and suspension are you running....I like its aggressive stance...
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Awesome work on a very custom T.N. setup! Hope this doesn't open a can of worms but....
I love the turbo blanket, looks real clean. Is there any issue with insulating in the heat? Where did you pick that up at?
Thanks man and again nice job!
Sean
I love the turbo blanket, looks real clean. Is there any issue with insulating in the heat? Where did you pick that up at?
Thanks man and again nice job!
Sean
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Originally Posted by hr2burn
Awesome work on a very custom T.N. setup! Hope this doesn't open a can of worms but....
I love the turbo blanket, looks real clean. Is there any issue with insulating in the heat? Where did you pick that up at?
Thanks man and again nice job!
Sean
I love the turbo blanket, looks real clean. Is there any issue with insulating in the heat? Where did you pick that up at?
Thanks man and again nice job!
Sean
Originally Posted by IIQuickSilverII
so that mean no driving for you even if weather report is "scattered showers"
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Originally Posted by IIQuickSilverII