Im not up on these - can someone explain if they have time, exactly what they do, can i fit them to an NA, are they worth whatever they cost if im running nitrous?

 

Thanks - and sorry bout all the questions

The standard injecters on an NA are smaller than the TT. If you are thinking of upgrading for Nitrous then i think that the triple fives are too big, you should go for the TT injecters :)

Im already running nitrous - through standard NA injecters (i assume they are anyway) but will changing to TT ones up any power ?

Not quite sure. The bigger injecters would make the setup safer because with Nitrous the last thing you want is to run lean as it can cut through your pistons like a blowtorch! So if your fueling is ok i dont think youd get much a "noticeable" change in power

yea - i must admit, for safety i didnt know whether to go for uprated fuel pump too - but the beast seems to cope well - iand i seriouslt never abuse it - as i love it too much

Running Nitrous on stock internals could be abusing it more than you think, ive just had all my valves replaced because of it! its cost me a fortune. wot size jets are you using?

50BHP per side - very rarely

Not too big then, mine was running 100's i think it was too much. If i was you id take it to someone who can check that the fueling is spot on just for peace of mind. Its a LOT cheaper than having the engine out.

Yea i think i will mate - nice one. Ill bung it on the rollers before xmas and get it checked out correctly - thanks

If you are running a wet kit (which I think I remember you are) then bigger injectors wont make any difference, the fuel you need to compensate for the nitrous is delivered by your Soleniods, not the injectors. And if you are not running a wet kit, it will only make a difference if you increase thefuel maps in your ecu. As putting bigger injectors in, by themselves (presuming you are changing the ecu to suit) wont actually change the amount of fuel you are putting in your system (if you dont change the ecu, you will be massively overfuelling).

 

The only difference the bigger injectors make is how hard they have to work to deliver a given amount of fuel and the maximum amount of fuel they can deliver. ie if 370cc injectors work at 80% to give you X amount of fuel then 555cc (in theory) will have to work around 50% and because they are bigger the maximum flow rate will be proportionatly greater. IIRC 370's are supposed to pan out around the 450 bhp mark, so if you are running "near as dammit 400", you should be fine. Particularly if the fuel for the nos is not going through the injectors (wet kit). My only concern would be , in the wet kit scenario, if you fuel pump is delivering fuel to the solenoids and the injectors, is it robbing the injectors of fuel pressure? This would cause the injectors to deliver less fuel that the ECU thinks they are, because the fuel pressure is lower than the ECU presumes. As always I stand to be corrected :)

Nice one Jock - thanks for taking the time to answer that so well mate

 

I should imagine that the TT runs a larger fuel pump than the N/A ?

If so i should try to get one to combat that problem.

Always just a rule of thumb on a reliability issue....always get just a tad more to ensure safety. No need in risking parts if you don't have to.

Nice one Jock - thanks for taking the time to answer that so well mate

 

I should imagine that the TT runs a larger fuel pump than the N/A ?

If so i should try to get one to combat that problem.

 

 

I would imagine so bud, but wouldnt swear to it. Maybe one of the other guys can say???

 

But I would get the pressure checked while you trigger the petrol solenoid for the nos (point the hose into a milk bottle or something rather than fire it into the cylinder) IIRC it should be 43 psi at idle

Will do it today mate - thanks for your information, very good of you

Not a problem buddy. I did make a mistake tho, I wrote 370 injectors whilst yours, as an NA, runs 270cc. But again on the wet kit , I dont see it running short.

Nice one