Forced Induction Supercharger/Turbocharger

Blower and the spray...

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Old Feb 1, 2008 | 07:23 AM
  #31  
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^^ I ran et drags on the street for a while.....

I think you will be fine, just start slow and work your way up. Its not like we are talking about another 300 shot or something.
Old Feb 1, 2008 | 07:52 AM
  #32  
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Originally Posted by CALL911
Thanks Ken. As stated previously though I am already on the "edge" of traction in 1st and 2nd gear, so any more power down low, and it would be wasted in spinning. Really just thinking about in 3rd and 4th to kick up the MPH.

Any more info anyone?
Ben-

Like others have said, you will get the biggest gains from the nitrous in the lower RPM range, where you don't have full boost yet. I don't think you will get as good of gains in the upper RPM. Most guys use the nitrous like this to get the car out of the hole faster, not to go faster on the top end. The area under the curve gets a huge gain when adding nitrous on top of boost.
Old Feb 1, 2008 | 08:23 AM
  #33  
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Originally Posted by rskrause
I don't think you will get a lot out of the wideband. I do not believe there is a way to calibrate it for nitrous. Just use the correct jets. You will need to pull timing, if your ignition box can do it then you don't need a separate PCM tune for spray. The N2O can be setup to activate when you hit second. A switch can be adapted to the shifter or you can set it up with a manually operated button. I have never set up one exactly like that, but I think it wouldn't be too dificult.

Rich
This would probably be how I would do it, only I was thinking 3rd gear instead of 2nd. Thanks for the info Rich, as always you have a plethera of knowledge I feel lucky enough to tap into from now and then.

Originally Posted by 1982z28with18s
Button on the shifter would probably work great for you, along with an arming switch. You can set it up to pull timing with the ignition box when the button is pushed if you wish.

Are you going to spray meth/nitrous together? Not something I would recommend doing.

I don't think I'd want to spray it on pump gas thats for sure!

Lastly, just to give ya sh*t, if you had a turbo, you could add the extra 100rwhp in 3rd that ya need on the fly, without nitrous lol.
Button on the shifter would work, but its not really what I would like ideally. I'd rather have it setup to come on in a certain gear. As for spraying with the meth, I believe someone told me I would be okay in doing this. Why do you say you "wouldn't reccomend doing" it?

As for your Turbo comment, I can't argue with the awesome power of a Turbo, but for my setup I am just looking for a simple way to get me some gains up top

Originally Posted by Boosted_Z28
Typically, you would want to wire the timing retard to the nitrous system so that anytime the system is "active", timing is being pulled.

Ben, have you ever trird a different set of tires? Not saying that the Nittos you run aren't good tires, but you may find something even better without going to an actual racing slick...ET Street tires have worked well for me. If you can maintain enough traction to spray your car off the line, you'll obviously see the greatest gains, as the nitrous will "wake up" the blower in the lower rpms where it needs it.
I am aware there are other DR's out there that hook better than the Nitto's. However the I prefer the Nitto's because they actually have some tread on them (this is why they don't hook as well as others). The tread makes them last at least a little while for me compared to going through street tires like I go through socks (lol). Not to mention I've seen and heard of too many guys picking up nails in their extra sticky tires on the street when they run something similar to the MT ET streets, or the BFG DR's. This car is driven 95% of the time on the street, so I'd rather keep a good medium between something that hooks, vs something that will last and not have to constantly worry about picking up a nail. For me Nitto's fit the bill perfectly, and I am not going to change.

Originally Posted by Ponyhntr
Ben-

Like others have said, you will get the biggest gains from the nitrous in the lower RPM range, where you don't have full boost yet. I don't think you will get as good of gains in the upper RPM. Most guys use the nitrous like this to get the car out of the hole faster, not to go faster on the top end. The area under the curve gets a huge gain when adding nitrous on top of boost.
Well, the thing is that it doesn't really have a "dead spot" down low. It floats up so quickly in 1st, I don't know really how much could be gained unless I drasticly increased my traction (which may happen with slicks for the track). I was more thinking about just increasing the speed of the 1/4 mile capability of the car by spraying in 3rd and 4th, but maybe as you say it won't benefit me all that much. You make an excellent point and it will definatly be something else to consider.

Here's a vid of the car 1st through 4th in its current setup. (it starts at 50 seconds into the vid)

Click here to see Video
Old Feb 1, 2008 | 09:54 AM
  #34  
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I use it with water/methanol injection and have no issues. It will still pull harder up top, but not as much gain as in the midrange. Still, I am sure you will see and feel improvements with a 100hp shot activated in 2nd or 3rd at WOT.

Rich
Old Feb 1, 2008 | 11:26 AM
  #35  
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Originally Posted by roguedriver
You might even lose it in 3rd spraying, even with drag radials. You would really see huge benifits at the track though. I dropped right around 1.3 seconds spraying a 150 shot on 10psi with my old s-trim setup given around the same 60ft times on the same day. Never got a chance to get out after my t-trim upgrade cause i cracked 2 SRP's running too much timing on the street. By the time i got it back together, the track was about closed and it was too cold. So i added a FMIC also in the meantime, got my timing figured out and now just waiting for the track to reopen in a month.

Ken R.
How much was too much??
Old Feb 1, 2008 | 01:24 PM
  #36  
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Originally Posted by rskrause
I use it with water/methanol injection and have no issues. It will still pull harder up top, but not as much gain as in the midrange. Still, I am sure you will see and feel improvements with a 100hp shot activated in 2nd or 3rd at WOT.

Rich
Thanks Rich. Do you think I would be alright with staying with my Autolite 3922's?

Originally Posted by Purple Poncho
How much was too much??
Well, once you get detonation, I would say its too much The ideal way to find out I imagine would be to start with a timing level that you know will be safe, then slowly advance it little by little until you see yourself getting close to running too lean. At that point you could back it off a degree and probably be set. This is all my guess, as I have never done it before, but it seems like the logical way to go about it.

Last edited by CALL911; Feb 1, 2008 at 01:30 PM.
Old Feb 1, 2008 | 01:25 PM
  #37  
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Old Feb 1, 2008 | 01:53 PM
  #38  
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I know my FJO controller would do a gear based setup by reading the rpms and after it hit a certain point it would engage....

Example - first gear lockout
-set rpm enable for 6000
-run it to 6500
-shift - tach drops below 6000
-nitrous is now armed when you get back in the throttle on the next gear - Althought I dont' know how a big stall would react or do.
Old Feb 1, 2008 | 06:29 PM
  #39  
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Originally Posted by Purple Poncho
How much was too much??
Right around 28 to 31 deg on premium pump gas with water/meth alone. I'm suspecting it was timing related, but couldn't rule out too tight of ring gap's either. It was wierd cause both cracked the 2nd lands. Tops of pistons looked ok though. As fragile as the material is that the SRP's are made of, i figure it could have been either cause, but since i was running that much, i leaned towards timing. Now running JE's with around 18 to 21 deg total with the addition of a FMIC and wider ring gaps and it runs harder then it ever did. Would like to take it to the dyno now and compare before and after numbers. Although i don't think it would show the full effects of the FMIC on a dyno, would be curious to see how it compares to my previous dyno run. Basically the same setup as before with the addition of the FMIC, less timing, wider ring gaps, and the loss of 1psi due to the IC.

Ken R
Old Feb 2, 2008 | 04:03 PM
  #40  
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running my F1 little above max impeller speed, 26 degrees timing from 4000-> pulling 2 degrees for a 100shot N20, The MA685 cuts it off at 6800rpm.
Have done this for aprox 25-30 runs 2007 widhout problems.
(50/50 E85/pumpgas and M25 nozzels water/meth (25/75) at aprox 90psi)
Running NGK8s
Old Feb 2, 2008 | 06:16 PM
  #41  
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Thanks for the info fella's. Anyone else have anything else to add? What about my plugs (Autolite 3922's)? Will they be cold enough?
Old Feb 2, 2008 | 07:40 PM
  #42  
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Originally Posted by CALL911
Thanks for the info fella's. Anyone else have anything else to add? What about my plugs (Autolite 3922's)? Will they be cold enough?
I don't know Autolites too well. Which number representts the heat range and how close to full cold is it?

Rich
Old Feb 4, 2008 | 02:20 PM
  #43  
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Originally Posted by CALL911
Timing is currently at 26 degrees, and "NO" I am defintly not using the stock rev limiter setting. The rev limiter is set at 7200 RPM. I usually don't rev it past 6500 RPM though since thats what the blower maxes out at. The top end will take 7200 RPM, but we brought it up to 7,000 RPM on the dyno once and it started dropping off pretty good after 6500 or so anyways (I think my AFR 180 heads were the limiting factor on that one).

Alright, so educate me; how do I yank a few degrees of timing out with my digital 6?
Sorry, I've not been online for a few days. Like someone already mentioned adding 12V to the Pink wire will activate the timing retard. It is adjustable up to 9.9 degrees. Here is a link to the Digital 6 instruction sheet.

http://www.msdignition.com/pdf/frm23775_6520.pdf
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