NITROUS OXIDE ( nos / n2o ) advice forum

RIGHT!!

Its time to start talking turkey about my nitrous assist for later this year.

I am so very pleased with the GMC 4/71 blower. Is only running 7 psi but is giving me great numbers on the dyno. I intend to take the blower to 10psi and get it running right with fuelling and ign timing. I'm hoping that this will get me back in the high 10's. Then I want some WON assist.

The first things I have seen with the blower is that it tends to make the car walk off the line with 60 foots as high as 1.8-1.9 seconds. I will need to see how this changes with a bit more boost. Once I have these answers I will need to know just how to add the gas. Should I add a 100 shot off the line as a fixed hit or should I add the gas a little more gently??

I dont think I'll need more than a 150 shot max if that. My existing 300hp system is still fully fitted but I think I'll need to move my pulsoids further back from the engine to make space for more fittings.
I have all my fuel stuff ready to fit a new tank with -10 connections + a 044 pump + reg etc. I've got all the lines in the car for the return as well.

I assume I'll be better off fitting Y connectors from the pulsoids?

My plan is to fit Y's at the pulsoid outlets each side (i have 1 pair of pulsoids each side of the V8) And then fit short stainless steel lines into 2 more Y's so I can get 4 feeds to each side of the V8?

I have got a selection of dis blocks but these will make the plumbing a bit messy in such a tight space.

I also have another 3 spare pairs of pulsoids if I should need to fit one pair to feed 2 cylinders each should the need arise.

Maybe I could fit 1 nitrous and 2 fuel pulsoids per bank for these low level hits? This would give me a good deal of tuneability with the fuel ?

Lots of questions eh??

Perry

No advice or comments ??

OK!! I guess I'll go it alone then

I'm hoping to beat my 10.6 PB with a lot less nitrous this year, or even no nitrous. And hopefully keep my head gaskets intact

i've already run 11.7 three times on 45% boost. I'll see if I can break the 10's on blower only and then add nitrous for my attempt at a 9 second pass.

I wont use the spider on this engine again for various reasons so I'm hoping my WoN DP system will do the job for me

I'll be fitting my 3 bar fuel system with 4 fuel pulsoids and 2 nos pulsoids + rail and return reg etc..

The spider plate will be modified and fitted to my other car for test runs at the end of this year if I can get it ready in time. Its only a 3.5 litre engine in the Escort but I reckon I can get it to perform ok.

See you guys on the other side of 10 seconds by this time next year if all goes well

Have fun you guys

Perry

all the best with it perry, dam need to work on my starts would love a 60 foot at 1.8 but mine is fwd, looking foward to seeing the escort to.

Do you mean individual jet holders in each crossfire for fuel and nitrous??


Would it not be advisable to fit a spider under the blower?? Or are you just talking about the faffing I'll need to do to make an adpator plate to go under the blower?

Time to get the shopping list together.
As I wont be using more than a 300 shot I'll stick with one pair of pulsoids per bank of the V8.

The fuel delivery will be via a 044 pump and fuel rail with return reg. Here is my thought on the setup:

1 pair of Y connectors from each pulsoid. Then the outlets from these Y's will connect to more Y's so i end up with 4 nitrous and 4 fuel from each pulsoid on each side of the V8.

I'm thinking that I should use solid nipples from pulsoids to the first pair of Y connectors. This will keep them secure and close to the pulsoid outlets. Maybe I should use more nipples to connect the next pair of Y's so its all solid ??

From the second set of Y's on the nitrous side it will be blue nylon to the crossfires. But where should I fit the fuel jet holders?

Should I fit them into each crossfire or should I fit them at the outlets of the second pair of Y connectors??

I guess if they are at the outlet of the Y's it will make it easier to change the fuel jets as the crossfires are tucked in below the blower flange. But if its best to fit the fuel jets in the crossfires I can do it. I'm thinking that jets in the Y outlets to the crossfires will be fine as this is the final point for metering from the pulsoids.

I've already got some stuff so i reckon my shopping list wil be:
8 Y connectors.
6 jet holders ( I assume these are the same as the ones I have for the spider so i have two of those already)
4 nipples.
8 jets for the fuel of assorted sizes. I'm thinking 8x20's 8x25's 8x30's 8x40's

I've got plenty of 4mm nuts, olives and pipe.

If this is right I just need to call Ant and get the stuff posted out.

The spider is now fitted to my Sons Escort V8 engine. I told him to leave it on the shelf as the car wont be out for shakedowns until next year. But he's nicked my spare manifold with the 600dp and he's getting ready to plumb it all in. I bet I open my box of won stuff next month to find most of it gone!! Bloody Kids!! The car sits outside so now I've got to get a tin of 3in1 spray and show him that he needs to give the whole lot a protective coating and then drape a cotton cloth over it?? I cant fault his enthusiasm though. But I'll have to slow him down next week when I tell him its time to build the last engine for my car if he wants to earn track time in it

DOH!!

Just re read and I now know its fuel jets at the Y outlets

I would use S/S pipe ,much easier to line everything up . See pic


Austin

Cool!
So 4mm s/s pipe instead of nipples.
I'll have a read up on the item.

Ta perry