NITROUS OXIDE ( nos / n2o ) advice forum

holy moly!

1600hp

You're probably going to be one of the first to investigate -10 AN feed lines!

He has twin bottles and relatively short hoses, so we shouldn't need to resort to 10.
Also by the time we get to the 5lb in under 4 secs mark, I hope he'll have his bottles inverted and even shorter pipes, so the flow will be even better.
For now we're going to see how much we can flow through his dual 6AN lines and then increase them as and when needed.
The aim is to be up in the 1,000 HP region within 2 meetings, which should be in under 2 months time I believe and then be pushing the engines limits by the end of the season, which in Sweden comes quite early, so we don't have a lot of time.

Extract from customers report with my responses in yellow;

The plugs look fine, it can take a lot more timing for sure.
EXCELLENT – how does the distribution look from the plugs?

I will send you the pictures of the plugs soon.

This is the EGT readings, left is the start line numbers at start 4.800 rpm. Run 4.5 seconds and pass the line at 6.200 rpm, the numbers to the right, (engine idle 4 seconds before shutoff)
Cyl *** Start 4.800 rpm *** Finish 6.200 rpm
1 ********** 908 ****************** 1270
2 ********** 886 ****************** 1249
3 ********** 967 ****************** 1245
4 ********** 919 ****************** 1274
5 ********** 984 ****************** 1314
6 ********** 959 ****************** 1341
7 ********** 992 ****************** 1275
8 ********** 811 ****************** 1293

Looks very good, spread is within 7% and in my opinion way to safe……both fuel and timing!
They look IMPRESSIVELY CLOSE to me, they're even closer than they were at the start of the run by a substantial amount!!!!!

Plus as you say they look very safe

Interesting comparrison of EGT's with and without nitrous - all comments welcome.

The temp. increase in the exhaust gasses across all 8 cylinders on N20 compared to NA looks pretty uniform. Does this indicate that the nitrous supplied is being evenly distributed??

Also.. temp increase on N20 to NA is small... Enough air is being drawn in along with the Nitrous to suppress detonation??

I take it that's quite an achivement considering the volume of N20 flowed over a short period of time
Reading into their reaction about the condition of the plugs is there room for advancing the timing also??

Just a brief note to say we're making good progress in getting work done to prepare the car for the next event, when the customer should be adding in the region of 500 to 700 HP, before cranking it up to the full shot at the race event after that.

Interesting project Trevor - I'm curious to see how it pans out.

...tfx datalogging ....

before you melt something. LOL

im curious to what the nitrous vs supercharged/turbo charged weights would be... i know that when i built turbo cars, we used GINORMOUS aluminum cells filled with ice, coils ran inside and antifreeze pumped through to keep the air temps down. it weighed ALOT by the time you added the entire turbo system, it was a big number. im sure this is lighter, but how much?

He doesn't have a TFX logging system but he does have the type the majority of the Pro Mod guys use (can't remember the name at the mo ), which is new and fully loaded as far as I'm aware.

I don't know the weight comparrisons between blowers & turbos to nitrous but I do know the following;

1) The REVO system in this thread weighs in the region of FORTY POUNDS LESS than a conventional US 2/3 stage set up.
2) It cost Chris Patrick approx $150,000 to save approx. 1/4 of that weight by replacing other parts of his car with Titanium and ultra light weight alloy alternatives.

With the above in mind, it's worth switching to a REVO system JUST for the weight savings and money savings alone!!!!!

I would imagine a huge turbo (or pair of) weighs quite a bit, not to mention all the pipe work, wastegates and intercoolers required to plumb such a setup..

Any news/data on how the car is running with more nitrous Trev?

The car is now running 500 HP max for this weekend.

Thankfully this customer is listening to my advice and as a consequence he made a 1/8 mile full power pass (on a 1/4 Drag strip) and coasted through to the 1/4, so he could check the plugs and data BEFORE doing a full 1/4 mile pass.
Unfortunately due to the usual new car bugs (NONE of which are nitrous related), he's only able to do THAT ONE run but thankfully, even though it was shut off at the 1/8 mile it was still quick enough to qualify him in 13th place out of 19 cars, so not a bad result under those circumstances.
EGT's & data logs all indicate PERFECT distribution still, so it's all systems go for the FIRST full power run over a 1/4 mile.

Unfortunately it rained all day today but there's hope that it will be dry tomorrow, so fingers crossed for that.

The weather improved slightly and the cars FIRST full 1/4 pass (using JUST a 500 HP limit and EXTREMELY SAFE settings) was PERFECT!!!

Unfortunately the time wasn't quick enough to win the round but at least we now have some data to work from and dial the car in more accurately for the next event.

I'm not going to disclose the exact numbers just yet but I can say this, the result is AS QUICK as the TOP UK Nitrous Pro Mod car has EVER run and this is JUST THE FIRST TIME the car and driver have run a 1/4 mile on nitrous!!!!!

Were both VERY PLEASED with that!!!!!

Are the turbo and supercharger boys taking note yet?? I bet the owner has got a grin as wide as the Thames barrier..

Yes the customer is EXTREMELY HAPPY and we're both looking forward to the next event but unfortunately that could be longer than we'd both like, due to the limited number of events at this time of year.

For the next event we'll either be running 700 or the full 1,000 HP and if that all goes to plan, I intend to upgrade the entire REVO system to flow in excess of 1,500 HP and with a bit of luck ramp it up to 2,000 HP.

For the record this nitrous system already has the capability to deliver the HIGHEST power figure, that ANY single stage nitrous kit has ever delivered.

When and where is the next run likely to be Trev? Would love to see the car run as I'm sure others who are following this thread would!

What nitrous power level do you think you'll have to run to start beating the traditional power adders? (turbo/supercharger boys)

I forgot to mention that the first run that he was only using nitrous and under power for JUST half the track (before shutting down), was MASSIVELY out of shape to such an extent that the car was close to flipping and to correct that problem he increased the nitrous delivery and lowered the wheelie bars. On the next run the car ran PERFECTLY STRAIGHT for the full 1/4 and it was mainly because he was racing a blown car, that he was knocked out.

I mainly mention this because I'd forgotten to include wheelie bars in the list of factors that needed tuning to achieve optimum results and I'm sure there'll be more adjustment needed in that department as well as the other items on the list, that he hasn't even started on yet.

Is this system only designed for a pro mod motor or could it applied to smalLer motors?

Yes it can be used on smaller motors (exactly as it is), as long as there is enough room under the manifold.
If there is a problem with fitting it as it is to another style of manifold, I'll almost certainly be able to re-design it to fit most other manifold designs.

What did it run Trevor? I didn't see any ET/MPH??