PA dyno day Sheets and Pics

ACELLR8

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Post pics from our PA dyno day and dyno sheets here. This is at Xotic Motor Sports in Gap PA, for anybody in the North East that wants an all wheel dyno this is an all wheel dyno.

Naturally Aspirated / Very Very Lean
2222DynoNA8-24-04-med.jpg


150 Shot (Used 150 shot N2O jet, and 200 shot fuel jet to fatten up)
2222Dyno150Shot8-24-04-med.jpg


95 Gen I on dyno
2222dynoday8-24-048-med.jpg

2222DynoDayAugust24_2004.JPG


93 Gen I on dyno (Redenuff93)
2222DynoLauri.JPG
 

DrumrBoy

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Red. Nice numbers!

Gotta question about your A/F as its somewhat the shape of my curve. Starts out real lean (16/1+)and then drops steadily to 12 over the next 2000 rpm.

Have you determined what causes yours to start out so lean?
:confused:
 

RedEnuf93

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"Red. Nice numbers!
Gotta question about your A/F as its somewhat the shape of my curve. Starts out real lean (16/1+)and then drops steadily to 12 over the next 2000 rpm. "

I am not sure, I need to go dyno more times to see what can be done. Mine was pig-rich in the beginning, see my earlier posts, expecially with the 200HP shot:
http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB14&Number=431358&Forum=All_Forums&Words=3114&Match=Username&Searchpage=2&Limit=25&Old=allposts&Main=431358&Search=true#Post431358

The 52NX and 33 Fuel added up to about 68% fuel, where as the 100 jet and 150jet mixtures are about 51-52%....? Go figure? Mine was so rich it dropped off the charts.

So I desided to make a 57 NX jet to compensate the 68 mixture. It seemed to work well, since the "bogging" I experienced dissapeared completely, motor run cleaner throughout the RPM range and it had a VERY smooth curve. It was still at 10.5 Air fuel ratio, so few ponies can be made there by leaning it out a bit more to 11-12 range.

All runs, with NX or without NX seem to start at 16 range and then taper to about 12.
 
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ACELLR8

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Red. Nice numbers!

Gotta question about your A/F as its somewhat the shape of my curve. Starts out real lean (16/1+)and then drops steadily to 12 over the next 2000 rpm.

Have you determined what causes yours to start out so lean?
:confused:

I am no expert, but it seems to me that all the vipers on the dyno were lean under idle and before a load was put on the engine. Being there is no load on the engine I don't really think it is a big deal.

Here is a dyno sheet for my wife's GTS, which also started out lean.

22222001GTSDyno9-24-04.jpg
 

DrumrBoy

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Red. Nice numbers!

Gotta question about your A/F as its somewhat the shape of my curve. Starts out real lean (16/1+)and then drops steadily to 12 over the next 2000 rpm.

Have you determined what causes yours to start out so lean?
:confused:

I am no expert, but it seems to me that all the vipers on the dyno were lean under idle and before a load was put on the engine. Being there is no load on the engine I don't really think it is a big deal.

Here is a dyno sheet for my wife's GTS, which also started out lean.



Red and Accel, thanks for the comments and leads. Most of the curves I see posted have a very flat A/F curve...mine is almost exactly like the sheet posted above. I'm playing with the VEC 1 to see if I can flatten it a bit; have to go back to the dyno to see if it has the desired effect, very tough to "feel" the difference.

22222001GTSDyno9-24-04.jpg
 

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