The V8 Owners Forum -

Hi all could do with some help in deciding what noss kit to fit.
I am running a 5.2 Rover with forged pistons with a CR 7:1 i am loking at an 8 injector fogger system with out purge no controler and button switching running through a 600 double pummper.
Its important for me keep it old school so no nos controlers.
Will be ready for the Retro show

Rich!!

How much gas do you want to use??

My 4.6 will take a 250hp shot all day long on stock internals. But trying to control that on a fixed hit is difficult.

If you want to stay old skool then you should look at fitting a twin plate NOS system. This way you can launch with a fixed hit off the line, and then hit a button to bring the next stage on when you need it.

If you deffo want a direct port fogger system you will need to mount two sets of solenoids as stage 1 and 2. I can explain this later.
But you will need to make up some wiring with latching relays and a throttle switch. You should not have the gas flowing during a gear shift. That will cause problems. So the whole nitrous system should run via a micro switch on the carb so the gas injection shuts off for the gear changes.

If you run an old skool setup without a purge you will suffer nitrous lag off the line. So if this is the route you want to follow I suggest you fit a bottle heater to keep the pressure up around the 850-900 psi mark.

Why do you not want to fit a system that will be state of the art for your engine??

Fixed hit systems just cause problems with traction on small engines like ours.

If you want to go multi stage with foggers you should talk to Real Steel or NOS themselves.

I just use a simple plate under my carb with 4 nozzles. And I have a bottle heater and a simple controller that gives me a fixed hit off the line and then brings on the rest of the gas over 2-10 seconds.

I ran a NOS twin plate system on my old engine with a 150 of nitrous.
I ditched this lot and fitted my present system which makes me quicker with just a 100 shot.

Hi Perry
see your point about plate system, my inlet manifold is single plane which has bosses for nos injectors hence the thought of fogger system plus a mate has a system for sale, i want to run a low tech system not into coil packs etc shes a true retro car and i want to keep her that way (some may say that's mad) I am looking to run 300hp nos shot and thought that not running a purge would help her of the line putting less strain on drive train.(Next bit to modify after exhaust)
I have sold my Audi S4 to fund the next stage of mods so looking to spent money wisely. At my workshop now looking at her and trying to decide time running out booked on rollers 24 th

Hi Rich, Perry is the man for nitrous advice , if youve got a single plane inlet, i thought a spider plate would be ok,?. I looked at getting one but ive got a dual plane inlet so no good for mine. rich

Tricky,

If you haven't thought about it, the TR7 shell needs quite a bit of work to handle a large increase of power, especially around the pick up points for the trailing arms.

Once you go over 300 BHP the floor area can start cracking and also needs reinforcement.

Also if you are running a standard rear axle the tubes are only held into the diff casing by puddle welds and need seam welding all the way round.

Have a look at Lanocha Racing's site and also the Wedge Shop for good advice, the Group 44 wide body kit being reproduced by Tim Lanocha is a very nice piece of kit.

http://www.lanocharacing.com/

http://www.thewedgeshop.com/triumphhomepage.htm


Kevin.

Good advice Kev!
But I think Tricky is running a Salisbury 2.8:1 TR8 axle. Which is the same as my 3.07:1 MGB axle. Apart from his being better than mine for ratio that is!!
So I reckon his axle will hold up for the time being as he is putting down less than 300hp. And I reckon the Salisbury will take up to 500hp for short bursts.

Tricky!
I see your point about running without a purge so you can use nitrous lag to give you a softer launch. But this will only work in cool weather. Or whatever the ambient temperature was when you first set the system up.

This way of setting up your gas system is a big gamble mate. And no matter how you set this type of system up. You will never be able to repeat the results. Even on the same day or within the same hour at the track.

To get the best from your nitrous you need to control 3 things. Fuel pressure, nitrous pressure and IGN timing.

I wont advise you on an old skool setup that COULD cause you problems or engine damage. I've been down that route with my old NOS system. And I dont want to go there again. Luckily my old NOS system didnt damage my engine. It just made it slower than it should have been as I was testing between Jan and May.

If you insist on going old skool / fixed hit, then at least fit a quad crossfire plate or a spider plate under your carb. This will give you the best atomisation at least. Then you can feed the plate with whatever generic solenoids etc that you want to use.

If you want a nitrous system that will be the dogs wotsits for your car you need to forget "old skool" mate.

Old Skool is great if you have a bulletproof 706 engine. But we only have tweaked up Buick 215's at the end of the day huh?

Safe is good!!!

So do you think a two stage fogger system would be best then Perry???? with a controller
I know my gearbox and axle are the weak links am running modified TR7
axle 3:9 with a lsd need to do work there to but one thing at a time,
Do you know were i can get some slicks from????
Thanks for all the help and ideas everyone

Rich!!
If you want Slicks then talk to Geoff Hauser on 01933 682500 and tell him what your wheel size is!!

A 2 stage fogger setup on a small engine will just clutter the inlet manifold Tricky. And it makes for a load of pipework that you dont need.

If you decide to fit the most basic of controllers, you will not need multi stages. You will need just one set of injectors either direct port or on a plate.

This is my latest upgraded set up. Its as simple as I can get it and it will flow from 25hp to 400hp of gas with no adjustments or alterations apart from fitting some small jets.

Tricky!
Did you get my email??

Regards
Perry

Yes Perry have been talking to Antony about spider plates
Got a holley that mite give you some ideas come and have a look

Well done matey

I've never used a Holley, but i did see a 4 barrel carb based EFI a while back. That looked interesting.