What engine mods next
 

Hi everyone...I have a 2014 370 NISMO with a deleted cat, fast intentions cat back exhaust and stillen intake...are there any other simple horse power mods that I could do next...basically I mean without ripping half the engine out...or even if they aren’t super simple, suggestions would still be appreciated...not super charging or turbo yet...just looking for 10,20,50 horse something like that

Headers, possibly?

Dewla Design air guide; Race Intake upgrade from z1; Ported throttle bodies; Ported upper intake manifold; Ported lower intake manifold; Headers; Cams. Listed in order of difficulty.

Some general notes: You've already done the big stuff. Cut your losses now and go for the tune, and you'll have 90% of the gains for a reasonable price.

Remember that you'll lose most breather mods if you go for forced induction (especially with a turbo), so unless you buy them used, they won't be cost effective (race filters, dewla air guide, possibly headers.) Cams, ported upper, and ported lower will all synergize well with your eventual forced induction plans, so they may be a better choice - but you won't see a huge improvement through most of your power band.

Gears. It'll be a hell of a lot more noticeable than anything else.

Tune. The improvement in the throttle response alone will be more noticeable than anything else. Not to mention you'll maximize the power from your other mods.

Thanks everyone...I forgot to mention that I did have it dyno tuned after those 3 mods...and yes eventually the stillen supercharger will be the end game...so with that in mind what can I do in the mean time that I’m not just gonna have to scratch later?

With the SC, you could do upper manifold, lower manifold, cams and headers.

Did your tuner adjust the curve at which the throttle plates fully open? My throttle response feels the same before/after tune but the car is faster overall. We didn't touch the throttle position curve though. Tuner said the engine knocks easily at the lower RPMs at high load, which makes sense.

I'm not exactly sure which parameter it is that was adjusted. But the fact of the matter is that I get a lot more gas earlier in the pedal travel than the numb stock mapping before. And the throttle input curve is now much more linear over the total pedal travel distance.

2 things already mentioned. Gearing and a tune. I did 4.08. Tuning will also align srm to the gear change.

Thanks guys...one more thing I store my car over the winter and every single spring since I’ve gotten the car tuned when I start it up and bring it out of the garage for the first time I get engine codes for the mass air flow sensor...this happens whether or not I keep the battery in the car all winter or bring the battery in the house for the winter...then I have to erase the codes and the car “usually” runs ok...there are times tho it feels like it’s in a limp mode so then I shut it off and restart it and that “usually” takes care of it altho yesterday I had to restart it 5 times before the throttle would respond normally...maybe I need to start the car once every couple weeks during winter while it sits?