? thoughts on the NHRA adding injected nitro to alcohol funny car class. I believe it has potential to be great for the class and the learning experience could be explosive. I had wondered for years why the would just use this in the dragster class. Hopefully it's a success.

I hope it works very well for whoever tries it! I remember in the early days of Pro Comp Ken Veney was very successful with an injected combo, Dale Armstrong as well if I remember correctly.
I think it's super cool!

I believe an injected nitro motor has a longer life span. Lower RPM.

I believe it took longer to move to Nitro in the funny cars because initially NHRA was concerned about engines blowing and burning cars. That would cause more work for the Safety Safari. I remember reading something about it.

I think there has been enough historical data gathered now to show that they are pretty safe compared to their blown Nitro counterparts and I agree that they would be easier on, if nothing else valve train parts. I don't know the cost difference though between them and blown alcohol overall though.

quote:

Originally posted by 69427:
I believe an injected nitro motor has a longer life span. Lower RPM.

Dead on,well for most part. The a/fuel car I help with leaves around 5000 at the hit and might turn 7000 at finish line. Car runs high 5;20 and 5.30's. We have to roll upper rods in about every 2 or 3 depending. A new clutch every run.Run vlaves and thats about it. Half the work is blowdown after the run but it is most critical part of it. ZDon't do it and you die. Not a joke there.

As for A/fuel funny car. A buddy of mine Scott Wiesss ran one back in late 90;s. Took them a while to get it working but once it did he was .2 ahead on number 2 that weekend. Next week IHRA ended it. A/fuel is freaking amazing deal. We run 439 ci motor.all the compression you can get and a 40 gallon pump. We use about 5.5 gal. per run which adds just undder 300 bucks to cost. Thyen you have 4 disc and 3 floaters for every run,thye can be ground and reused to a point. Tuning wise they are finicky little *******s. Keeping all 8 lit for whole run is the trick.Once you get that done then the clutch needs tuning to not blow tires off. That in turn reduces load on motor which mean fuel need adjusting. So bacially top fuel with less moving parts to go wrong.
We figure its is around 2k per shot. PArts wse its cheaper than blower deal,but fuel and oil make up for it.
Botome line want to run 270 plus its not going to be cheap no matter how you get there.

Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blower deal.

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

quote:

Originally posted by wideopen231:


As for as safety wise A/fuel lot more dangerous after the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

Did he die?

quote:

Originally posted by CURTIS REED:

quote:

Originally posted by wideopen231:


As for as safety wise A/fuel lot more dangerous after the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

Did he die?

Not yet but to the amazement of everyone who knows me. I do the clutch and help with tuning on car.

I do watch the two guys doing the blowdown very closely. Being in a hole trapped in the line of fire so to speak.LOL

Going to be a steep learning curve but end results should be worth it. Randy Meyer was testing his early this year at the FC Chaos race at the Motorplex. He is as smart as the come with a A/F motor and car never got past 60 ft without smoking/shaking the tires

quote:

Originally posted by wideopen231:
Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blower deal.

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

How much timing they running on those Nitro deals?

quote:

Originally posted by Curly1:

quote:

Originally posted by wideopen231:
Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blower deal.

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

How much timing they running on those Nitro deals?

STFU clown

quote:

Originally posted by Curly1:

quote:

Originally posted by wideopen231:
Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blowl.er dea

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

How much timing they running on those Nitro deals?

Little difference based on tune up of coarse. Most have 60 to 67 base. Pulling 12 to 18 at hit and all or target max back in around 2 seconds. 2 degrees make pretty good diference and can mean good run or sob WTH did that come from.

One tip do not run 2 -5 clutch disc. Seems -5's ar equal to 40 grams on or off clutch and aggressive. Found this out from guy who got the disce and told me after the run were we had the dude .1 by 60 and was pulling at 330 and that sob were did that come from showed its face. When we watch race results and nobody really running as good as we did on the worst track of the weekend. Oh well got to love this, Oh yea still pissed about that run(in case can't tell) Bad info or not it's still the clutch guy's job to set it up to make it down the track. But it did get me new hardness tester to add to toolbox

Oh yea I have never been good at accepting screwup is my department of car

Whole deal is nothing but learning curve. Heck even Prock said its easy because limited piece compared to their deal but harder to get a gain out of these.

Like all things racing its just a balance of power and traction and how much when.

It is addictive as hell,Best drug ever nitro and even better when on someone else buck.LOL


Sry long winded on Top Alcohol racing and the nitro stuff just TDMF.Wife says it is girlfriend she will not try to compete with.LOL Already getting piece for a second combo for Nostalgia A/fuel,just what I needed.

so as not to overrun the thread, I will try to limit replies more. Apologies to OP

This message has been edited. Last edited by: wideopen231,

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Curly1:

quote:

Originally posted by wideopen231:
Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blower deal.

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

How much timing they running on those Nitro deals?

STFU clown

Really guy ask perfectly legit question just to learn and that is reply. Hum sounds like another member on site.

I wanna hear 8000 leave and a blower shriek!

quote:

Originally posted by wideopen231:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Curly1:

quote:

Originally posted by wideopen231:
Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blower deal.

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

How much timing they running on those Nitro deals?

STFU clown

Really guy ask perfectly legit question just to learn and that is reply. Hum sounds like another member on site.

I generally keep them both blocked

quote:

Originally posted by wideopen231:

quote:

Originally posted by Curly1:

quote:

Originally posted by wideopen231:
Parts wise Crank life about 4 times that of blower.Rods about 4 to 5 times. Valvetrain not issue unless somethiing just breaks. Like said in first reply 5000 to 7000 rpm easy on parts when compared to 6500 to 10,000 plus and most shif above 10k on blowl.er dea

As for as safety wise A/fuel lot more dangerousafter the run than it is on track ad 270 mph.Do not blow all nitro out of motor before turning and get compression on cylinder with nitro and pick the head up in next pit .No joke from guy standing behind #8 pulling clutch after run.

How much timing they running on those Nitro deals?

Little difference based on tune up of coarse. Most have 60 to 67 base. Pulling 12 to 18 at hit and all or target max back in around 2 seconds. 2 degrees make pretty good diference and can mean good run or sob WTH did that come from.

Chris - First one I saw years ago was David Baca Sarmento car. When he told us how much lead it had I bout passed out! Holy crap! Pretty amazing motors.

Have to get head start lighting off a fuel that does not want to burn but will blow up easy enough.LOL You would think with 2 x 44 amp mags and 14.76:1 you wouldn't need anywhere near that.

Chris, can you elaborate on the bore/stroke ratio for A/fuel?

I think they have a small bore and a long stroke for the slow flame travel.

Thanks