jacobs controller

mgbv8 · Post by **mgbv8** » Mon May 11, 2009 5:20 pm

Only way to really tell is to stick an oscilloscope on the controller Rich.
This way you can see if its pulsing or not.
I suppose you could use an analogue voltmeter which may react to show a slowly building voltage. But without sticking mine on it I couldnt be sure.

What solenoids are you using again??

Perry

bones · Post by **bones** » Mon May 11, 2009 5:30 pm

Nos cheater items, we tried toget them working by adjusting the rpms that the nos would cut in ,took the nos fitting of the plate ,reved the engine over the trigger mount and nothing,

bones · Post by **bones** » Thu May 14, 2009 10:53 am

am going to try the wiring at the weekend,as im not sure the wiring to the hyfire is correct, If it is then i dont have a clue, What jet sizes is it for a 75 shot, and how much can i do straight of the button by not using the controller?? ,And Perry ive never heard of that ostrichie scope thing,so i would have no idea how to use it, the only pulse i can check is the one in my wrist,

rich

topcatcustom · Post by **topcatcustom** » Thu May 14, 2009 12:07 pm

bones wrote:And Perry ive never heard of that ostrichie scope thing,so i would have no idea how to use it, the only pulse i can check is the one in my wrist, rich

do you really need a controller for a 50 or 75 shot? If you already have the controller Rich why not go to 100 or 150?

TC

mgbv8 · Post by **mgbv8** » Thu May 14, 2009 9:46 pm

Rich!
I can run a 200 fixed hit with no problems. But I cant do it off the line. I have to be around 100 feet out before I hit the button. Otherwise I'll break something or the tyres will just let go big style.

Why would the hyfire wiring be an issue for the gas system??

Post by **Coops** » Thu May 14, 2009 9:54 pm

are you refering to the retard wiring on the hyfire rich?

bones · Post by **bones** » Fri May 15, 2009 8:31 am

TC i plan on going upto a 150 shot

, the diagram ive got for the jacobs controller has got the green wire from the dizzy going to the green from the controller and the green from the hyfire going to the yellow on the controller.

rich

bones · Post by **bones** » Sat May 16, 2009 4:44 pm

well weve gone through the wiring and stuff today, With the jacobs it said that if the solenoids are over a 1" in diameter to use the wiring for a port injected system, so we tried it today and fitted a relay aswell like it said and we have working solenoids

. so will test it out sometime, What jet sizes is it for a 75 shot, ive lost my list again

rich

mgbv8 · Post by **mgbv8** » Sat May 16, 2009 7:30 pm

"What jet sizes is it for a 75 shot, ive lost my list again"

What injectors are you using Rich? Or is it a plate system from NOS?

bones · Post by **bones** » Sat May 16, 2009 7:44 pm

nos Plate system, flare jets, Well took the car out for a test and the fuel pressure drops down to much to use, so back on the fuel problem again sunday

rich

topcatcustom · Post by **topcatcustom** » Sat May 16, 2009 8:06 pm

Rich, why not just stick a facet pump in there for the nos?

mgbv8 · Post by **mgbv8** » Sat May 16, 2009 9:09 pm

As Tom says Rich. Stick a separate fuel pump on for the nitrous mate. And do use a good quality fuel pressure switch to shut the nitrous down if you lose pressure. A £30 switch can save a whole engine! PS. Dont use a real steel switch. Both of mine have failed shut. I use the wizards switch now.

bones · Post by **bones** » Sat May 16, 2009 9:27 pm

i will use the carter pump ive got spare, the strange thing is ive got 2 regulaters ,1 for nos fuel and 1 for carb fuel, but i cant change the pressure on the nos fuel line ,screw it right in or out pressure stays the same,??. Perry does the wizard fuel pressure switch fit the nos system ok, i never fitted the nos system on my car but the fuel pressure is right next to the fuel solenoid and according to some paperwork it should be atleast 12"away??. If i cant get the controller working then i will just 75 straight of the button,cant afford to replace it

rich edit time, re-checked the wiring and other stuff and tested again but no joy with the nos solenoid, fuel solenoid works ok , even tried heating the bottle up but still no joy, im wondering if the controller is naff as all solenoids work ok straight of the button

rich

mgbv8 · Post by **mgbv8** » Mon May 18, 2009 4:21 pm

It certainly sounds like the nitrous output is dead from the controller Rich.
The wizards pressure switch just screws into the same hole in the fitting that the nos one did I think.

Why dont you wire the solenoids via a relay straight off a micro-switch on the throttle.
I've got an old controller lying in the garage somewhere. I think it might even work too. When I get a minute I'll find it and test it. If its ok. You can have it mate. I'm sure I've got the wiring diagram too.
In fact...I'll go and look now.

Laters...

bones · Post by **bones** » Mon May 18, 2009 5:01 pm

Cheers Perry,

.well weve been tinkering again today ,and got the nos solenoid to work, then it didnt then it worked for about 4 times then it didnt, so it seems to be pot luck if it works

. The fuel solenoid always works. I still cant work out why the fuel pressure regulator cant be adjusted,everything seems ok inside, there is not much to go wrong with them??

rich