nitro question (2 Viewers)
- Thread starter cephus
- Start date
Just Paul
Nitro Member
True Story. Brian has mixed some nitro..What's the biggest dose you ever put together Bri? 93-95??
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Les
Nitro Member
Both NTF & NFC are allowed to run 100%, some run up to 98%...the fuel pumps are limited to 21 gal/min for the Funny Cars and 20 gal/min for Nostalgia Top Fuel. Nothing in this world sounds better than a Supercharged V8 on 98% Nitromethane.
Some Nostalgia Nitro Racers will run a higher static compression with a lower Nitro % with great results (in part to keep the engine alive at the finish line). In the Big Show, a lot of the top 1/4 mile MPHs in history were done during 85% era (though there may be other factors for that that I don't know about).
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I bet the cost per run from the 5.70 cars to the 6.0 cars is Huge!
.
Nitro Member
Brian has mixed some nitro..What's the biggest dose you ever put together Bri? 93-95??
I think the highest I've mixed was in the 90% range. (give or take
)We never got too crazy...
.
Nitro Member
I guess it would depend if there was any engine damage. Some guys claim to run 5.70's with no damage.
coyotedale
Nitro Member
philosophy is different from one tuner to the next. here are a few basics that have been the normal understanding as of late.
To go as fast as the nostalgia fuelers go with given the restrictions, especially in the gearing for the AA/FD's and small tire; you need to make the motors RPM. Big numbers will show well in excess of 10 grand through the lights. To get them to spin that fast, a lower percentage in the tank seems the way to go. Fuel can burn only so fast, with a high rpm, the piston can get ahead of the fuel burn. Lower percentage of nitro will burn faster, the given volume of fuel per stroke will burn more completely (equals cylinder pressure/power). More rpm also means more pump speed, equals more volume; that's critical when you are restricted in pump size.
when Brendan used the rat motor, that wasn't a big speed combo, and would make more power down low and in the mid range. since it would operate at a lower rpm range, it seemed to like it around 94-96% in the tank. But it would get grumpy on the big end. Now with the elephant combo, it makes power in a different area, and to run the numbers today, it needs to run at a higher rpm. So with that in mind, while it's still being sorted out, it seems to like it with 84-86% in the tank.
have some run 5.70's and not hurt parts? yup. Boggs/Bartone were pitted by us one weekend, the thing was a bracket car running low 70's, might have dipped in the 60's too, but the thing was running perfect, and they never took the heads off. when you would hear it run, especially when we were at the turn off and he is comming at us, that thing would sound like a TAD; it was screaming.
Paul Smith has a slightly different approach with the combo's used in the Jungle and BrandX cars. Last Oct at Smokerspatch, during elim they didn't take the heads off the BrandX,, I think he told me they used the same plugs too.
so there ya go. hope this helps.
cephus
Nitro Member
thnx all very good class info, actually hav been approved 2 run the nostalgia specs in a promod in the outlaw class here in bama but it wuld b 1/8 mile,,the nostalgia cars r so cool i wuld rather go c them run instead of the suits just not a close race 2 bama, gonna try and go to bakersfield in march to watch ronnie and cory's cars run
2 bama, gonna try and go to bakersfield in march to watch ronnie and cory's cars run
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NitroHunter
Nitro Member
I can think of one VERY stout FC running only 80%...
Les
Nitro Member
Good Stuff Dale...there are three AAFDs that I can distinguish the sound off in the distance when they warm up in the pits: Brendan with the Chevy or Hemi, Bartone, & Jim Murphy. Bartone's sounds like a monster even when they do the alcohol-only warm up. Brendan had the Hemi sounding pretty beastly at the Saturday Night Nitro last July. I love the sound of NTF engine combinations.
Les
Nitro Member
I can think of one VERY stout FC running only 80%...
Me too.
coyotedale
Nitro Member
Peter Gallen's car is one that runs a light load. This is why I like nostalgia nitro, so many different combos. CHRR funny car semis, it had two elephants and two flatheads (one was my customer)
There will be more nitro cars at the upcoming March Meet (March 7-10) than you will see and hear at the Winternationals... at 1/4 the price for a ticket to Pomona.
I think Darr is on to something....I heard NHRA will Broom the current Fuel classes and replace them with the Nostalgia classes in a couple of years!
Raconteur
Nitro Member
NFWay
