Nitro Tune Ups

[james hartley]

Quote (Nasty @ Sep. 24 2009,14:20)

Time to rethink the combination seriously

That's why I'm asking.  How much % overdrive with lets say 30% in the tank (until I can buy bigger pump) to get feet wet?

[Nitrohelper]

Quote (james hartley @ Sep. 24 2009,20:38)

... to get feet wet ?

I would go the other way , more to the NF/C tune-up. Get the same camshaft as we run.
Take the blower way down to be close to a 6.71 @18% maybe 26 #s boost ?...
... keep the mag timing low until you get your bigger nozzle sizes, (area & stagger) , balanced out.
I would use a 24 nozzle system ,with 16 idlers when you go over 85 %  ... sometime warm it up on 93% to feel where your headed.
Start with 70 % , but move up to 85% in steps , with adding more area if the pistons are hot..
You need the percentage to get "heat" power of Nitro , plus you won't sound like an alky pussy (sorry)  when staging ! ! !
Then... if all of your eight workers are happy , you can step up the Mag ,
then some more Pump , more Nitro,  more wallet , etc.  to just keep going faster ...  
                                                                                                                            ... ... ... ... ... ...  ... another one bites the dust ...  '>

[james hartley]

With that type tune up what rpm would you shoot for at the line?

[Nitrohelper]

Quote (james hartley @ Sep. 25 2009,20:09)

... what rpm would you shoot for at the line?

We run 82-8500-at the 1320 with a 3.89 gear & a 36" tire.

[Mark Leigh]

Is that with a 25 gal pump Jerry ?

[Nitrohelper]

Is that with a 25 gal pump Jerry ?

Yes a 25 gal would be safer when using a 14:71...anything up to 27 gal with a VRA deal , after that the main jets start getting too big for me.
Most of the NF/C match guys around the Midwest are using 24-26 gals it's a good insurance plan for the pistons as long as they keep the 18% on a 6:71.

[james hartley]

Will a 3 disk Crower glide 10 inch aluminum (ti stands) clutch hold up to the N/FC tune up you mentioned above?  Bought the Enderle 1270 pump, going to try 75% with 15% overdrive.

[Nitrohelper]

author is james hartley ...10 inch aluminum (ti stands) clutch ...going to try 75% with 15% overdrive...

I haven't run anything but titanium since the '80s... pump should work depending on the blower , around 24-28#s of boost should be safe.

[David Pace]

We use a 10" aluminum glide with aluminum flywheel in a direct drive NTF car on 92-96%, and it works great and holds up fine.  Can't imagine why it wouldn't work in a flopper, too.
Ya gotta maintain and take care of this stuff though and not leave it in the bell housing for days or weeks on end, LOL.

[james hartley]

Jerry based on what we have talked about I think I'm getting closer to getting out to the track.  I now have 4 extra sets of rods with pistons and rings hanging on them ready to go as well as a fifth set of rods in the box and 8 new extra sleeves.  My 30 gallon pump is being flowed this weekend.  At this point I need some extra plugs, oil, fuel, 16 port block and 8 additional lines.  We are swapping out the 4.30's for 3.90's and going to put on the M/T 36's.  So at this point are you ready to fly out to California for 4-5 days?  Free food and room (motel 6) still on a budget you know

[Nitrohelper]

Jerry based on what we have talked...  Free food and room...

The snow is gone in Cheeseland , low 70s today , only one more month to Nitro Dazes around here ,
we'll keep using the phone until your fuel tank has tasted that 80% ,then it's time for a wallet protector ...
maybe a fall trip around Bakersfield time when the other geezers go west...

[james hartley]

Seems we have a pretty good fall race at Bakersfield, hopefully I'll still have a few spare aluminum soldiers to deploy around that time

[james hartley]

What oil do you guys like?  I bought a couple cases of Brad Penn nitro 70 to get started. We are dry sumped with 22 quarts.  I understand a few folks warm the car on 10w-40 cheap no name oil, any truth to that?  For the warm up can we put 12-14 quarts in instead of the full 22? thanks

[wobble]

i know one nfc car that kept warping his aluminum donut and hat.

[GJacobsmeyer]

I use the same 70 wt for warm but I have also heard of others using standard wt oil to keep cost down.

How much oil for a warm up?  That will depend on your system, idle engine speed, and pump volume.  An easy way to check is, with the engine idling, look in the dry sump tank, and measure the amount of oil above the pickup.  That amount above the pickup is not being used.  I use 12 qts at warm up.  :::Warning:::  Wacking the throttle my increase your warm up engine oil volume requirements!

Same theory for the run oil.  Measure what you have in the dry sump tank at idle, this is what you will have when you are staging the car.  Calculate how much oil the pump will remove from the dry sump tank during the run (assume no oil makes it from the oil pan to the drysump tank during the run just to be conservative) and be sure you have that much or more.  Also don't for get to include the deceleration event when the chutes are deployed, depending on your tank design it may cause a problem.  Don't worry about staving the oil pan pick-up just the drysump pickup.  And of course more oil is always safer.  I use 16 qts for a run.

Jake