Figure on updating my progress. Have a 2010 Honda Fit Sport Manual (USA spec).


1) Intake (HPS short ram) (already done), -1.4 secs 5-60 MPH.
2) Plugs (Denso IK22, indexed) <<< was not able to detect a gain of HP.
3) Exhaust (quiet), estimate <<< tried Tanabe Medallion Axle back and was not able to detect a gain of HP.
4) Put 17 lb tires on vs 20ish lb tires << was not able to detect a faster 5-60 MPH time.


5) Fill the gas tank with high octane pump gas.
6) Looking at VitViperTuning and Ktuner ($200 + $499) for an estimated + 10 WHP. By gosh if it makes +10 more WHP I WILL be able to detect a gain (5-60MPH runs)


Other opportunities not pursing at this time:


A) remove Spare, Back Seats, 1/4 gas [lighten car] estimate -.2 sec (more time take off, harder it gets)


B) Lightweight rims and tires, -.3 sec


C) Supercharger.
..




Perhaps sometime in the future:


Strut brace front
new shocks which could possibly include coil-overs (big $)
15x7 lightweight rims and tires (big $)


The car is 4 years old to me. Need to weigh the cost of the mods on an old car versus putting money into a new car that could better serve my purpose. Generally newer cars are better than older ones.

 

It has been 2 months.

Any updates?

 

No more work done. Next thing considering is K-Tuner.

 

You're so wrong.

 

Well, geeez!


Is my Public Education (in the South) coming back to haunt me!?

 

base fit 2012 best car of all time. but i might be jaded.

gonna move my giant commuter ties onto my steelies and get some lightweight tires to go on my15" rota slipstreams. then try my first autocross

thans for the thread I'm loving it

 

Sweet.


Cheapest and easiest HP increase is HPS Short Ram. Expect more than 1 sec off the 5-60 MPH time. Results will vary.

 

Clubs and their races and venues:


NC region:

http://www.ncrscca.com/Solo




Eastern NC:
http://www.thscc.com/autocross/index.html


Triad NC:

http://www.auto-x.com/


Central NC region:
http://www.ccrscca.com/category/events-calendar/


SC region:
http://www.scsportscar.com/solo/schedule/2013_results/

VA region (VA Beach):
http://www.odr-scca.org/content/view/12/31/
http://www.odr-scca.org/component/option,com_wrapper/Itemid,32/


SCCA events:
http://www.scca.com/events/?sid=76

Washington, DC region:
http://www.wdcr-scca.org/SoloAutocross/EventsAX/tabid/84/Default.aspx

 

It's been over two months. Still considering? Anything new? Was looking to you for more news.

 

No more news. Need to see more info. before willing to pursue the KTune option (like a dyno post before and after of a Fit tuned similar to mine). Also there is the $700 expense and where this $ will come from.

Loving the HPS Intake. Spun the filter a little to get the clean side front. Vtec isn't kicking anymore. Thinking its because its in the 90Fs in NC and just can't make decent HP being that hot.


Still zinging this engine every chance I get. What a blast! Cheap thrills. Only thing a faster car would get me is more trouble, faster.


Enjoy your Fit. Look forward to your news.


Yo

 

There are many things aftermarket that make your GE8 faster, lightweight pullies, intake manifold, bigger throttle, high comp pistons (13:1:1), forged pushrods, port heads, high cams, bigger valves, heavier springs with titanium retainers, exhaust manifold, hondata, turbo application, etc you name it...

 

The best bang for the buck to increase HP is a turbo kit. If I had to do it all over again, I would have saved all the money doing bolt-ons & spend it on a turbo-kit.

Pullies, Lighten fly, bigger throttle-body, louder exhaust... you end up losing drive-ability (and MPG). A turbo-kit you won't lose drivability. Add Low-Compression Pistons & Forged rods, crank up the boost and the FIT would be a fun car.

The FIT is a tough platform to modify. But I enjoyed it, because it's different.

 

Indeed turbo app is the best choice to increase heavy amount of HP... But all depends what are the needs, if you forge the crank, put forged pushrods, low comp pistons, put heavy inserts to the bolts, change the intake manifold plus increase amount of fuel injected, easy can get 250hp. But all depend of what are the needs.

 

Old thread and I was asking questions in the beginning for my GK5 (Sold) but I never stated what my thoughts were.
In a straight line:
1) Short Ram Intake (As big, short and Wide as possible....with no bends). Large Air Filter, bored out throttle body, larger maf (Tune modified to support it.....modified maf table).
2) 2" Exhaust (Straight through muffler, piping with little to no bends), lighter weight if possible.
3) Lightweight pulley (Undersized to free up even more hp).
4) And most importantly (LIGHTWEIGHT WHEELS & TIRES). To take it a step further, tires lighter than stock tire weight and reduced diameter. The smaller the diameter of the tire vs stock, the faster your acceleration.

Doing these above is what helped my GK5 reach my Si goals while being N/A. See 1/4 mile time in sig.

 

i wouldn’t say “easily”. My kit came with a T25 turbo. At 8psi it made 187wtq before it the wrist pin gave out. Built the new block with forged pistons and rods.

Ktuner maxes out at 10 psi so I put in an AEM FIC and now shooting for 14 psi. That will yield about 220 whp I think. The turbo is maxed at 18 psi.

Most Any bigger turbo will require oil and water cooling. But fabricating a turbo manifold and exhaust was taking me too long and I wanted to get driving again.

I’ve got $5k into the build so far and I’d be happy with 220 whp

 

i wouldn’t say “easily”. My kit came with a T25 turbo. At 8psi it made 187wtq before it the wrist pin gave out. Built the new block with forged pistons and rods.

Ktuner maxes out at 10 psi so I put in an AEM FIC and now shooting for 14 psi. That will yield about 220 whp I think. The turbo is maxed at 18 psi.

Most Any bigger turbo will require oil and water cooling. But fabricating a turbo manifold and exhaust was taking me too long and I wanted to get driving again.

I’ve got $5k into the build so far and I’d be happy with 220 whp

 

Jason,

What fuel mods did you do when you added your turbo? RSX injectors and an Evo fuel pump are what I am looking at for my kit.

 

Hi!
I'm running some 550cc injectors and a stock fuel pump. Right now my duty cycles aren't running above 30% and that's at 13 psi.

 

Awesome! That is much appreciated information. I am only planning about a 7psi setup so I should be golden with just an injector upgrade!

 

A few things with the injectors.
RDX injectors are popular because they're cheap and conversion harnesses are easily available. I actually ran those in my

Turbo TSX until I went with a bigger turbo.

For the Fit, the conversion harness didn't fit. I ended up making a jumper between the engine harness and the injectors themselves. Made myself go crazy trying to figure out why the didn't work.

If you buy injectors that aren't RDX, make sure they come with latency details for more than just 12 volts. I went through three ebay sellers before I got one to give me that info. Reason being, our cars run on a 12 volt system, but the ECU will feed between 12 and 14 volts to the injectors. You can see this in the second to last column on the logs from KTuner. If you just input the 12 volt only then it won't run right. You'll get jerking during acceleration and stalling when you come to a stop.

At 7psi you'll get around 130 whp and wtq on a stock ignition map. If you advance the ignition pretty dramatically you'll get around 150 wtq and 140 whp.

You can preload the turbo actuator (asuming you're using an internal wastegate) and get an extra psi or two... but be careful otherwise you'll get too much added pressure and blow the engine.

This is a thread on how to tune with Ktuner. It's basic but has some context on how to read a log file.
https://www.fitfreak.net/forums/2nd-...ng-ktuner.html

This is a thread on how much power a stock engine can take. Spoiler alert... less than 187wtq.
https://www.fitfreak.net/forums/2nd-...ds-clutch.html