dynod the 20

Post by **sil820** » Wed Mar 31, 2004 4:49 pm

dyno'd at 189 at the wheels

mods:hks fmichks bovapex n1 exhaust w/ 3" pippingJIC test pipefuel pumpand stock boost

i cant wait till i get all the rest of my stuff and put it on

Post by **Yellow4g63** » Wed Mar 31, 2004 4:49 pm

Did they check your Timming to see if it was right?

Post by **dekand** » Wed Mar 31, 2004 4:49 pm

seems awefully low to me... *confused*

Post by **NISMO_RB25** » Wed Mar 31, 2004 4:49 pm

that seems low for stock boost on an RB20? What would you expect it to be? I was thinking that was probably what would be expected for a close to stock RB20.

If that is low, I am wondering what my RB25 is going to dyno at. I have similar mods, and the FMIC will happen soon.

Post by **dekand** » Wed Mar 31, 2004 4:49 pm

rb20's put out 220 at the crank on stock boost, exaust, and smic, he has a fmic, 3" exhaust, and stock boost, and no cat, just seem low, i would expect that to the wheels on a "stock" rb20 ...

im also interested in what my rb25 will produce with fmic, 3" n1 duals, high flow cat, and stock boost...

Website · Post by **frosted flakes** » Wed Mar 31, 2004 4:49 pm

yeah the numbers seem a bit low....

i made 176RWHP on mine and i have stock intercooler, bov, stock 240sx exhaust, stock boost...

i expect atleast 20HP gain from aftermarket exhaust and intercooler..hmm

Post by **PROJECTRB240SX** » Wed Mar 31, 2004 4:49 pm

Its should be near 200hp stockish and with those mods it should be damn close to 200 or over it. Remmeber the skyline had a 38hp drivetrain loss with a longer driveshaft, You should see less of a loss with less travel path.

Post by **PROJECTRB240SX** » Wed Mar 31, 2004 4:49 pm

make sure timing is at 20btdc not 15. 15 is for the automatics.

Post by **Yellow4g63** » Wed Mar 31, 2004 4:49 pm

I would like to see the A/F too. You said it was running rich but how rich? off the charts? lower than 10? or just in the 11's?

I would think it would put down 200-210 maybe with those mods but if it's running too rich and the timming is off then it would read out those #'s.

Post by **sil820** » Wed Mar 31, 2004 4:49 pm

well the car is running rich right now..also the timming is off i think.. but i cant really check it cuz i dont have the gun..but i know its not at stock timing..

Post by **sil820** » Wed Mar 31, 2004 4:49 pm

whats stock boost by the way? 7? 10?

Post by **wga240** » Wed Mar 31, 2004 4:49 pm

Yeah stock is 10 lbs or so. For reference, I have stock downpipe, gutted stock 240 cat, 3" catback, fmic, and a pod filter and my boost gauge reads around 12.5 psi WOT until higher rpms then it drops down to around 10. That's with no boost control of any kind, so you should probably be seeing about the same.

Post by **goofynick6** » Wed Mar 31, 2004 4:49 pm

Might be some pressure loss across the IC, not sure where boost is measured. Probably once the timing is corrected it'll be just fine.

Nick

Post by **Yellow4g63** » Wed Mar 31, 2004 4:49 pm

Hey sil scan the dyno run and email me the jpg or host it on the forum I want to see whats going on.

Post by **dj_lennon_franz** » Wed Mar 31, 2004 4:49 pm

damn i ran 195.6 HP at the wheels with a FMIC 10 psi (stock boost on my current setup for some odd reason) and a straight piped cat (2.25 exhaust) with my SR20...i think u would be making a bit more power with those mods of yers =(

what gas are running on that setup??? what size turbo was on the RB20?? wasnt it a T04?? somethings wrong there mate

Post by **dareo** » Wed Mar 31, 2004 4:49 pm

glad to see some dyno numbers, thx for spending the time and $$ to test it out for us. But its a blow towards my RB vs KA-T decision. If your making 189 at 10-12 psi with 6 cylinders i just dont know what to say. Lots of KA24DET guys are at 300+hp with 10-12 psi.

There should be a lot more power in your RB20 thats still not coming out yet for some reason, timing or fuel probably.

I'd love to see the power curves, i bet they're sweet.

Post by **PROJECTRB240SX** » Wed Mar 31, 2004 4:49 pm

ITS NOT THE TRUE NUMBERS.... THERE IS QUITE ABIT MORE POWER LURKING IN THAT MOTOR THAT'LL COME OUT AFTER SOME FINE TUNING.

Post by **goofynick6** » Wed Mar 31, 2004 4:49 pm

What kind of dyno was it? That's important.

Nick

Post by **PROJECTRB240SX** » Wed Mar 31, 2004 4:49 pm

ONE THING I NOTICED IS THAT THE WALBORO FUEL PUMPS MAKE THE CARS RUN EXTREMELY RICH OFF THE STOCK INJECTORS. I GET FIREBALLS FROM THE TAILPIPE BETWEEN SHIFTS.

Post by **Yellow4g63** » Wed Mar 31, 2004 4:49 pm

dareo wrote:glad to see some dyno numbers, thx for spending the time and $$ to test it out for us. But its a blow towards my RB vs KA-T decision. If your making 189 at 10-12 psi with 6 cylinders i just dont know what to say. Lots of KA24DET guys are at 300+hp with 10-12 psi.

There should be a lot more power in your RB20 thats still not coming out yet for some reason, timing or fuel probably.

I'd love to see the power curves, i bet they're sweet.

You can never compare the 2 at the same boost levels. He has a stock turbo, while the Turbo KA's don't have stock turbo's. If you want more RB20 dyno check the Skyline down under forums. Most of them pull 170kw to 200kw to the wheels. When he changes the stock turbo out and gets it tuned right compare #'s then.

Website · Post by **frosted flakes** » Wed Mar 31, 2004 4:49 pm

yeah i am running rich around 10.5 a/f ratio. I heard that you can get around 25-30HP extra just for tuning a the rb20det into the 12.5 a/f range....yes my car is running extremley rich too.

ya i think you need to tune, get new plugs, time, get air/fuel controller and you should get around 225HP or more to the wheels up the boost to around 13psi then you will get around 250HP to the wheels for sure.

also i boost about 11psi at WOT with my side mount intercooler without a boost controller (stock boost)

Post by **goofynick6** » Wed Mar 31, 2004 4:49 pm

lol..10.5 ratio is borderline being able to even fire the plug!

Nick

Post by **sil820** » Wed Mar 31, 2004 4:49 pm

ill scan the dyno in 2night.. its running really rich.. right now and its idle is a lil off by like 200.. im not sure whats wrong with it

Post by **Yellow4g63** » Wed Mar 31, 2004 4:49 pm

If the car was dynoed at Dyno works chances are there was no fan blowing on the intercooler either.

Post by **Carl H** » Wed Mar 31, 2004 4:49 pm

damn, my rb put down 179whp.thats on a mustang dyno.so that equates to a 215 - 15% drive train loss is around 183.that running smic, 10psi, and stock timing, stock dump pipe.not to mention it was leaning out under boost.as we added fuel it keept making more power.

Post by **Wulfgang** » Wed Mar 31, 2004 4:49 pm

PROJECTRB240SX wrote:ONE THING I NOTICED IS THAT THE WALBORO FUEL PUMPS MAKE THE CARS RUN EXTREMELY RICH OFF THE STOCK INJECTORS. I GET FIREBALLS FROM THE TAILPIPE BETWEEN SHIFTS.

Fireballs are cooool, but why do you think it's the Walbro? Maybe your pressure regulator is stuck? Or do you think the regulator is too small?

Anyone running with an aftermarket regulator?

Post by **PROJECTRB240SX** » Wed Mar 31, 2004 4:49 pm

I'M BASING THIS OFF MY SR EXPERIENCES. IN MY CASES I'M GET ALOT OF MID-SHIFT BACKFIRES WHICH ARE A COOL LIGHT SHOW BUT IT GETS IRITATING WHEN YOU CAN FEEL THE FLAME TRAVELING DOWN THE EXHAUST PIPING. I THINK JUST A FUEL TUNER AND INJECTOR UPGRADE WILL TAKE CARE OF THIS PROBLEM.

Post by **goofynick6** » Wed Mar 31, 2004 4:49 pm

This always happens, a stock FPR is designed to work with a regular pump. The Walbro 255 will increase the flow and the stock fuel pressure will usually rise 3-5 psi.

Nick

Post by **PROJECTRB240SX** » Wed Mar 31, 2004 4:49 pm

YOU GUYS DO KNOW THAT YOU CAN INCREASE FUEL PUMP FLOW BY INCREASING VOLTAGE TO 18 RIGHT? ALMOST ALL FUEL PUMPS ARE DESIGNED TO WORK AT 18V BUT MOST CARS ARE ONLY 12 VOLTS..... BY UPPING THE VOLTAGE YOU WILL INCREASE THE FUEL FLOW. THIS IS A GOOD BIT OF INFORMATION FOR GUYS ON A BUDGET, I HAVE DONE THIS ON SENTRAS AND IT WORKS GREAT. YES, THE INCREASED FUEL FLOW INCREASES STATIC FUEL PRESSURES.

Post by **goofynick6** » Wed Mar 31, 2004 4:49 pm

The kenne bell boost-a-pump does teh same thing, but can be adjusted..etc.

Nick

dynod the 20

dynod the 20

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