Dual stage plumbing (Harley)

[jackpg75]

I'm going to add a second stage to my install. I have a plenum intake manifold that feeds both cylinders (remember this is a v-twin motorcycle engine) and plan to use a single nozzle centered in the plenum for the first stage. For the second stage I plan to use two more nozzles. I've seen lots of wiring diagrams for dual stages and I think I have that covered, but what I need is some help with the nitrous plumbing.

Here's a diagram that shows what I'm thinking of doing. I would prefer not using 2 purge solenoids since I am extremely space limited. What do ya think?


http://www.trirycheracing.com/pichost/Dual_Stage_Config.jpg

--jack

[hammered54]

you'll never find a Y ( npt to AN ) - 3 or -4 fittng to go from the solenoid to the nozzel's I've looked.
but all in all there is no reason that that won't work. this is a dry system?

the manifold is simalar(sp) to the screaming eagle? you may want to use an anular nozzel at the center of the split.
then a reg. B nozzel at each port entry.
and I take it that the nitrous pressure regulator is a nano?
Matt.

[jackpg75]

you'll never find a Y ( npt to AN ) - 3 or -4 fittng to go from the solenoid to the nozzel's I've looked.

I have a NX p/n 16077P and 16078P 1/8 NPT to -3 Y fittings. It seems to work with the NX solenoids I have. BTW, I'm not sure I will use them due to vibration concerns - these types of fittings don't last long on the Harley.

but all in all there is no reason that that won't work. this is a dry system?

No, this is a wet system. I made the diagram only for the nos side. I expect the fuel side to be similar - I just didn't draw it.

the manifold is simalar(sp) to the screaming eagle? you may want to use an anular nozzel at the center of the split.
then a reg. B nozzel at each port entry.

No, the manifold is completely different. It is similar to the one in this pic:

http://www.trirycheracing.com/pichost/manifold.jpg

I currently have a single nozzle in the center of the manifold near the carbs. I am going to add 2 more nozzles one each side. The reason I put the nozzle on the carb side of the manifold rather than near the port was on the advice of a friend that has done nos on Harleys for many years. He has done a bunch of dyno work and told me that he has the best gains this way. He thinks that it helps cool the entire intake change resulting in more power.


and I take it that the nitrous pressure regulator is a nano?
Matt.


No, I am using a "Pressure Pro" from Tupelo Performance. Looks like their web site is down, but it looks very similar to this one by ZEX:

http://www.zex.com/Pages/34/Pressure%20Regulator.aspx

I have it set to 950 psi and I try to keep my bottle between 1000 and 1050 before each pass.

Is there a way to eliminate 1 of the purge solenoids? I'd really like to have just 1 if possible since I am space limited.

Thanks,

--jack

[hammered54]

yes as a matter of fact there is, you'll need 3 tee fittings, 1 on each of the solenoids including the purge.

just run a line from ea. of the noids inlets via. the tee's to the purge inlet also a tee and there you have it.
I do it on my fogger set up this way.


not sure if you'll be able to see it here clearly.

http://i27.tinypic.com/awc2lv.jpg

come's out from under the soleniod (red fire shield going in, s/s coming out to tee), go's to a tee under the regulator's then up to the purge. this draws it all the way through leaving it purged right at the sloenoid inlet.
hope this help's Matt

[Robert56]

Looks like your plumbing is fine. I have a similar set-up for 3-stages on my Z06. have you any pictures of your bike? Can you give details on your system? We are very interested in what your doing. I have a sprayed IronHead HardTail and a MagnaCharged EVO, both can be seen on my site under Harleys. By the way, we are in testing right now for NANO on the Harleys, a kit should be soon.
Robert

[jackpg75]

The bike is a Harley Pro Gas drag bike. Here's some details:

D&G Chassis, 70" wheelbase
160" Big Twin motor
Bradfoote 4-speed auto transmission
Mickey Thompson 10" rear slick
Buell S-2 style fiberglass body work

Nitrous stuff:
2.5 lb bottle
Nitrous Express solenoids (15100L/15101L)
NOS Fogger 2 nozzle (1 nozzle centered in plenum manifold)
Wilburn Motorsports Pressure Pro (nitrous pressure regulator)

I have plenty of pics of the bike. Try this link and look for pics of the red bike:

http://www.trirycheracing.com/2009_Sturgis/index.html

I am currently running a single stage that is activated when shifting into second gear. I haven't had much luck with progressive controllers due to the extreme vibration environment so I am going to re-do it and setup a multi-stage system using a couple of digi-set timers to activate the stages so I can start earlier and then apply a bigger shot a little further down track.

Please keep me informed on the nano setup - I'm interested in checking that out.

--jack

[srsnow]

My only advice would be to run the nitrous at a slightly lower pressure and to compensate by running a bigger jet. This way you have more room to work, the problem with small bottle set ups is massive pressure drop. By setting the pressure to 800-850 you will have more room to work if pressure starts to drop.

[jackpg75]

I think using a little less nitrous pressure would be a good idea. I have been asking the Pro Mod (import) guys what they do, but they don't provide many details - maybe their programs are top secret or something :eek:

Using less pressure may also help since I have a hard time keeping the bottle pressure where I want it while waiting in the staging lanes. I might configure a little cart with a battery for the bottle warmer.

Thanks,

--jack