Exhausting Nitrous on a 1991 Q

[DR.Q]

I have seen very little talk about nitrous on a Q. I ran a 105hp ZEX dry shot on my SVX(3.3L H-6/230 hp stock) with excellent results. It cut 1.9 seconds off the 0-60 and 1/4 mile. What would it take to run something similar on the Q? Exhaust played a huge role on the SVX. I tried a dozen different systems on it to find the best NA/N2O performance. Would the stock Q exhaust be capable of flowing another 100hp or so? Or would some mods be in order? Also, is the JWT ECU a must have when running nitrous? Thanks.

Stephen

[elwesso]

Stephen..... The B.A.D. Q45 is the only Q that I konw of that has nitrous...

With 175 shot, it was running mid 12s.....

Im pretty sure the stillen nos kit comes with an ECU upgrade, wether it be a piggy back deal or what.....

I would recommend doing some exaust mods...

[DR.Q]

Stephen..... The B.A.D. Q45 is the only Q that I konw of that has nitrous...

With 175 shot, it was running mid 12s.....

Im pretty sure the stillen nos kit comes with an ECU upgrade, wether it be a piggy back deal or what.....

I would recommend doing some exaust mods...

OMG Wes, only one? I'll have to be the next guinea pig then. The best thing about nitrous is that the car doesn't lose any of its stock mannerisms as with other mods. I wonder how the traction will be. With the AWD SVX, I was never able, not one time, to break the tires under any road condition. I imagine it will a bit different with the Q.

Stephen

[Jeff Williams]

I would start out with a 75 shot, then see what it does.

[DR.Q]

So, no exhaust mods NECESSARY for an extra 100hp?

[DAEDALUS]

The exhaust is a restriction. It would be easier to add 100 hp with a larger exhaust, but maybe not required. Cram enough fuel and oxygen in there, and it will overcome the restriction. The dry NOS system relies on increased fuel pressure to deliver the extra fuel required. Are fuel pressure and volume directly proportional? If you double the fuel pressure, do you get double the fuel, assuming the same injector duty cycle? If so, then you might get 100hp, roughly 1/3 more than stock, by increasing the fuel pressure to about 60psi. However, the system I'm aware of relies on altering the vacuum to the regulator to get the extra fuel, so a stock regulator won't cut it. You will have to find some way to get the extra pressure, while still delivering stock pressures at anything but WOT, and you will probably spend some time tuning the system for the right ratios. The other option is with an ECU upgrade to increase duty cycle of the injectors and leaving the fuel pressure alone. Probably not worth the expense unless you go all out with a wet system.

[1qckser]

Actually we have 2 brothers here in CT that own Qs, one has juice the other does not, the car that does have juice is not running the JWT setup but still has had great results, he is running a 75 jet and is using a stock exhaust with the rear muffler removed and replaced with 2 1/2 pipe into a free flow muffler, These guys have looked on the board but have no interest in posting, you will sometimes run into someone with a Q that has done some mods yet never see these people on line, Wes your the only one with fuel cell in a Q but not the only Q with juice, AZTEC up in MA had a 100 shot on his also car, I think Sophan helped him install it.