NITROUS OXIDE ( nos / n2o ) advice forum

The Trans is fine just need to get the setup sorted now

Hello everyone,

Sorry it’s been a while since last updating everyone.

For those of you that follow me and the class may have heard/read that we've had somewhat of an up and down season. It all started at Easter when I destroyed 2 gearboxes, diff, and main bearings. Which was down to having the car baseline after the winter rebuild and the rear axle being move forward and the entire end float in the engine and trans being taken out. Then again at round 3 major gearbox failures. So I invested in a JW Promod Glide problem solved.

Round 4 and after talking with Trev at length I changed a couple of things on the nitrous.
Bingo 8 seconds backed up with an even quicker 8.8 @ 154mph with 1.46 sixty foot. But it was short lived joy we had melted a piston.

So due to a rebuild we couldn't make round 5. With this in mind I decided to go bigger and the Spider was sent back to Trev for a few mods to increase flow. New engine built and ready to go.

Round 6 We were all a little nervous but shouldn't have been we had far too much for the track so had to back everything off to get down in one piece. The track came round and we had a great race against Mats in his Opel and beat him. We had the car set up perfect for the track. Next up was Brian in his Twin Turbo Mustang. The car felt lazy in the burnout and by 1/4 track it became clear why, this time 8 melted pistons and a not happy team.

Back at the workshop we pulled the car apart to find this time I had taken the block as well. We sat down and went through everything. The fuel was drained through the nitrous fuel pump through extra fine filter from the paint shop next door. The nitrous system was stripped to every individual component, nothing.
I've been building a 57 Chevy for my sponsor, so I put my MSD unit on to that and did some test runs. What I found was amazing after 5 test runs the MSD put all the Timing back in. This happened 4 times so no fluke.

500bhp nitrous and no timing retard.


So what now?????????????

After talking at length with Dave Powell Performance unlimited an order was placed for a Ford Motorsport block and further talks with Dave and Jonny Barb I had some pistons made for my block and head combination. The new engine is almost finished I'm hoping to have done by the weekend.

The plan is to have it Dyno'd by the end of the month and back in to do some testing in Feb for the new season.

I'd like to thank my had working crew and backers

Trev (Wizard of Nos)
Southern Batteries and Tyres
Express Gearboxes

This season were hoping to be pushing for a higher finish in the championship. We already have conformation from Graham and Max from Southern Tyres and Batteries and Trev that they will all be carrying on their support.

1 change for this year is we are hopefully going to be supporting Help For Heroes via our local base at Thorney Island. But I will bring you all more on that as it happens.

Great report Ron but you missed out the bit about the REVO upgrade, so maybe you'd like to tell them what we're up to now on that front.

Hello Trev

I wasn't sure how much detail you wanted to share at the moment.

As Trev has now brought it up as part of the engine/power upgrades our Spider system will now feature a nice new shiny set of REVO's along with a new Max Extreme and new fuel system.

I've been in talks with Trev for a long time now about putting the REVO's on the Cortina. When we first talked about it Trev wanted to get some data back from Dave on his bike first. So we carried on developing the Spider. We both feel that the time is right to change to REVO's. I'd like to thank Trev for staying with us as there are people out there with massive bugets compared to us/me but he has been very patient

The new engine will be 598ci compaired to the old 545ci, we've also gone bigger on the cam, change the rods to Ali as well as changing the rod length. Basically the the only thing were using from 2010 is the inlet and carb.

I have the new engine booked in on the dyno for the end of Jan where after getting the engine set up we can spend time setting everthing up.

Sorry I missed your call earlier Ron - I'll call you tomorrow.

Ron!
What are you doing to upgrade the fuel system. You changing the fuel pump?
If you are then let me have first dibs on your old one if you decide to sell it please

He'll be using a couple of high flow fuel injection pumps.

BTW Perry I should get a bit of time to make that long awaited reply you PM soon.

No rush Trevor.

So what fuel pressure are you thinking will be best?

As high as possible but it will depend on what the REVO's achieve the best and closest matched fuel delivery at, which to some degree is reasonably flexible and hopefully will be even more flexible soon.

I suppose as long as you have a fuel system that will deliver say 3-4 bar at the correct volume for wot + a good chunk in reserve with a responsive fuel rail pressure regulator with a return line you would get good stable pressure and linear flow volume throughout the operating range of 0% to 100% ??

How would you size the pumps:
Max volume required + say 50% ??

How does the AFR link work?
As an example, will it back off the nitrous revo's if it starts to run lean. But keep fuel revo's flat out to maintain the mixture?

Assuming wot condition of course.

It has the user selectable option to either raise or lower the fuel or nitrous flow as required, to maintain the target ratio.

Cool!!!

So two decent EFI pumps will do?
I think the rule of thumb is roughly hp/12 to give a rough gph target.
So 500 / 12 = 41.66 gph for each Revo system??
That means that a couple of Bosch 044 pumps would be ok yes?? They will flow about 70gph @ 5 bar even when hot They have a big inlet and a smaller 1/2" outlet.
You can pick these up on bay for about £50.00
I know because I bought one to fit on my system for some flow testing

Wish I'd read your post sooner as we've just purchased a batch of Bosch 044 pumps (because as you say they will do the job perfectly), at a much higher price than £50 each.

My pump is an equivalent but seems to be ok. I'm surpised that they have gone up by a tenner since I bought mine??
They must be having a good sales run eh?

http://cgi.ebay.co.uk/BOSCH-044-DA-27-3 ... 255504c4b7

There's a lot of fake Bosch 044 pumps on eBay so I've been told I'm sure a google search will bring up a how to spot one!

Bill

Just checked out Ebay and I don't know where you saw them at £50, because most were nearer to £150 each and even the rip off copies were approx. £70 and even the brackets were almost £50, so I don't feel so bad about the price I paid now.

I've already flow tested my copy pump and its spot on !!
15 mins flat out and the flow was stable??

£50 for brackets???

Just for info?

Why would we need to use high pressure high flow fuel delivery system for the spider??

Or is this a Revo requirement??

The whole system can run at a range of pressures but because we're currently working on TWO TOP SECRET PRO MOD REVO systems (which do NEED to run at the highest possible pressure for a number of reasons), I'm intending to apply as much as possible of what we develop for those on to Ron's set up.

So should I keep to my 5-6 psi fuel supply for my 300 shot and still keep fuel jets in the pusloids on my spider setup ??

Unfortunately based on your previous reported issues it's not an easy one to call.
I've responded to your pre Christmas PM at last and I think you should read and respond to that, before we try to deal with your future plans.