ITB NSX retune (big gains)

[gsrboy]

Finally got it on the dyno for retune. Tired of the 10.0a/f at idle. And 10.5-11.0 at full throttle. Got on the mustang dyno on 3rd gear at 309 whp in 3rd and ended up gaining another 14whp making it 323whp and 4th gear made 440whp initially and ended with 349whp. All done on a mustang dyno. The car is in much better shape now.



http://www.youtube.com/watch?v=C99oij1DKWc&feature=youtube_gdata_player

 

[doc_tai]

Damn 349 whp on mustang. Impressive

 

[RYU]

Tuan... all I can say is....

DAMN!

When can I experience this beast??

 

[ScienceofSpeed]

Congrats, grat improvement. Your results mirror what we've seen with our individual throttle bodies - the engines are particularly sensitive (more so than a single throttle car) to rich mixtures. I presume this is from atomization quality.

-- Chris

 

[L_RAO]

Sorry if I missed it, but why were you running around at 10:1 this whole time?

BTW, nice numbers. I'm sure the car is that much more fun now.

 

[racer9x]

Nice numbers.:smile:

 

[gsrboy]

Sorry if I missed it, but why were you running around at 10:1 this whole time?

BTW, nice numbers. I'm sure the car is that much more fun now.

At idle it was. The last tuner had a hard time getting it to idle any leaner. Driving around it was around 12:1 and in full throttle it will dip from high 10s to mid 11s mostly in the low 11s.

Thanks man, the car feels so much faster. The 275 falken rt615 is breaking lose in 2nd.

 

[L_RAO]

I went back to your build thread, and sorry if I'm asking stuff that's already been posted, but I couldn't find specifics...

My questions:

1. What pistons are you running? What compression ratio?
2. You ended up with "Bisi" spec camshafts, right? Do you have the specs?
3. Which fuel injectors are you running, and at what psi?

Thanks.

 

[gsrboy]

I went back to your build thread, and sorry if I'm asking stuff that's already been posted, but I couldn't find specifics...

My questions:

1. What pistons are you running? What compression ratio?
2. You ended up with "Bisi" spec camshafts, right? Do you have the specs?
3. Which fuel injectors are you running, and at what psi?

Thanks.

I went with CP piston 12:1. Yeah I ended up with bisi spec cams which are just webcams identical specs to SOS NA cams. I am running injector dynamics 725cc @about 55psi.

 

[gsrboy]

I am driving it down to SoCal this weekend.

 

[L_RAO]

I am driving it down to SoCal this weekend.

Whereabouts? Are you going to visit RYU?

 

[RYU]

I am driving it down to SoCal this weekend.

Whereabouts? Are you going to visit RYU?

Sorry, this is a little OT. Perhaps you guys would be interested in this. I'd love to see both of your cars see daylight. Lord knows mine has been in hibernation
http://www.nsxprime.com/forum/showpost.php?p=1649757&postcount=23

 

[gsrboy]

I'm going to be near Santa Ana and garden grove. I'll probably visit ryu and track addict.

 

[gabedm]

Your car sounds SEXY!

 

[TURBO2GO]

Nice flames

 

[A.S. Motorsport]

Very nice indeed, noting beats the sound of ITB's.
Quite a nice backfire, i head a few similar ones two weeks ago whilst driving, scorched a bumper...

 

[chussey]

Finally got it on the dyno for retune. Tired of the 10.0a/f at idle. And 10.5-11.0 at full throttle. Got on the mustang dyno on 3rd gear at 309 whp in 3rd and ended up gaining another 14whp making it 323whp and 4th gear made 440whp initially and ended with 349whp. All done on a mustang dyno. The car is in much better shape now.



http://www.youtube.com/watch?v=C99oij1DKWc&feature=youtube_gdata_player

Why did you make more power in 4th gear than in 3rd gear?

 

[gsrboy]

Why did you make more power in 4th gear than in 3rd gear?

That I am not too sure about. My tuner said something about overcoming the dyno roller weight or something like that. Maybe someone else that knows about this can chime in. We did several 3rd and 4th gear pulls and it was consistent with the power. I feel a big difference at WOT.

 

[sparky]

... the mustang dyno on 3rd gear at 309 whp in 3rd and ended up gaining another 14whp making it 323whp and 4th gear made 440whp initially and ended with 349whp.

is that really 440 or did you mean to type 340 ?

 

[TURBO2GO]

is that really 440 or did you mean to type 340 ?

It's 440 RWDP. Rear wheel donkey power. :biggrin:

 

[kookoo4nsx]

Dyno sheet? I'd like to see what kind of torque this puts out compared to a low boost sc.

 

[gsrboy]

oops sorry I mean 349. I will get the dyno sheet tomorrow. Its in my car ill snap a picture of it.

 

[gsrboy]

 

[moderu]

Wow!

 

[Nero Tenebre]

Nicely shaped curves there, flat TQ and linear HP.