sTOCK hp - Page 2

dfoster154 · 03-17-2009, 09:35 AM

Quote:

Originally Posted by sk8world

I find these numbers close. I made 323 at 13-14psi (creep) on a old stock motor with basic bolt ons. And these numbers were on a dynodynamics unit but converted to dynojet numbers.

hmmm I just reread your post, based on the DynoDynamic to DynoJet conversion I would be looking at 320ish as well...

Maybe I do need to spend the $$ on AI and start running a water meth mix to get more.

afterburn27 · 03-17-2009, 10:48 AM

I think those numbers are reasonable as well. With 10 psi on bolt-ons, stock ports, stock fuel, RP mapped ECU, & stock seq. turbos I dyno'd 300whp uncorrected on a humid 95 degree day with NO FAN, lol heatsoak. The corrected number was 321whp, but the SAE correction isn't really accurate for turbocharged engines. (Dynojet numbers)

I ran at 14 psi occasionally and that car pulled like a raped ape up top. AFR's were solid, although I'm sure I was close to maxing out the injectors.

I never took the car to the track, but on the street I was able to easily run down a few low 12 second cars.

sk8world · 03-17-2009, 02:20 PM

Thats the ticket... Go to the track and get a trap speed, that tells all..

I am trying to go back and find my stock twin dyno. It was 323 at around 13-14psi. Bottom line is stock twins are a blast to drive. I had mine going 7.8's in the 1/8th back 10yrs ago with just intake, exhaust, pettit IC and PFC computer.

hades · 03-17-2009, 05:24 PM

i assume everyone with full exhaust also port their wastegates and installed boost controllers?

dfoster154 · 03-17-2009, 09:42 PM

My wastegate is stock, and I have boost controlled by the PFC through Injector Duty Cycle. In the cold temps boost will push 13.5 psi, but in 60degree + I typicall top out at 12.5psi

albertomg · 03-18-2009, 11:57 AM

Pretty cool. Would you happen to have a better view of the dyno plot? I'd like to see the low end of it as well.

Signal 2 · 03-18-2009, 01:09 PM

Quote:

Originally Posted by Doc-1

Okay had the old girl Dyno=ed last night
The car is stock except for the 3 inch exhaust but it has a high flow cat, air pump with a stock air box, has 99 spec twins running in stock configuration

Probably missed it, but I'm still confused. ^From this I assumed Doc was still on a stock ECU, but subsequent posts refer to his "tune" and the fact he has "99spec twins". So it is modified with a programable or reflashed ECU? And wouldn't 10 psi on 99 twins be the same as 10 psi on stock twins?

I'm not certain you'd get all that much of a challenge from the "other forum". I seem to remember some of the established guys there already mentioning serious gains to be made just with a DP, hi-flow cat and cat-back. Can't remember for sure, but the figure of 20 whp as being tossed around.

dfoster154 · 03-18-2009, 01:22 PM

Here is my car's dyno sheet from last may.

the spyder · 03-24-2009, 02:45 PM

Interesting.

Im making 336whp on a 99 motor, twins, 93 PFC, full 3" exhaust, intakes, and stock intercooler. However I am maxing out my injectors, need to upgrade to a SMIC, and properly duct it. Looking for 360whp ish.

Cp1 · 04-08-2009, 03:34 PM

Quote:

Originally Posted by Chadwick

I would get 15 B.S. posts if I put this on the other forum; the reason for the good numbers are the 99 turbo's and a good tune. The abraded seals make them 10-15% more efficient at the same boost level. I can only guess that at some point some respected person on the other forum posted that the seals didn’t do anything and everyone jumped on the bandwagon, but I can tell you from experience that they do make a difference. I put down 315 rwhp at 10 psi, but my engine also has 9.7:1 compression rotors.

Dan

reduced clearances do indeed make a huge flow difference on turbos like rad fans. those 99 turbos flow a lot more air than stock because of those abraded seals. if anyone disagrees tell them to remove their radiator fan shroud and see how little air they move then!

Signal 2 · 04-08-2009, 06:59 PM

Quote:

Originally Posted by Cp1

reduced clearances do indeed make a huge flow difference on turbos like rad fans. those 99 turbos flow a lot more air than stock because of those abraded seals. if anyone disagrees tell them to remove their radiator fan shroud and see how little air they move then!

They're more efficient.....yes. Quicker spool...OK. But at a given pressure and at given intake temp...say stock boost levels.....10 psi is still 10 psi isn't it? No difference in max hp at the dyno. Or am I missing something?

SPICcnmFD · 04-09-2009, 08:20 AM

Not necessarily. If they flow better, then 10psi is more hp than the one that doesn't flow as good, which is why most singles make more hp at the same boost level as twins. Boost is just backed up flow that can't get through the engine.

Chadwick · 04-09-2009, 10:09 AM

Also a more efficient turbo puts out less heat at the same pressure which will add to the HP gains.

Doc-1 · 04-12-2009, 09:41 AM

The car has a y-pipe, exhaust with high flow cat, RB dual tip, down pipe, commander stand alone ecu, 99 spec turbo's, a careful rebuild on the engine, K&N air filter and Mazdaspeed inter-cooler. I expected about 300 HP to the rear wheels with this setup at 10 PSI and got 294, 12 PSI got me 314, about right. Intake is stock

03-17-2009, 10:48 AM	#17
afterburn27 Rotary Fan in Training Join Date: Feb 2008 Posts: 58 Rep Power: 18	I think those numbers are reasonable as well. With 10 psi on bolt-ons, stock ports, stock fuel, RP mapped ECU, & stock seq. turbos I dyno'd 300whp uncorrected on a humid 95 degree day with NO FAN, lol heatsoak. The corrected number was 321whp, but the SAE correction isn't really accurate for turbocharged engines. (Dynojet numbers) I ran at 14 psi occasionally and that car pulled like a raped ape up top. AFR's were solid, although I'm sure I was close to maxing out the injectors. I never took the car to the track, but on the street I was able to easily run down a few low 12 second cars. __________________ '93 RX-7 (GT3574 track toy) '74 Triumph TR6 (weekend cruiser)

03-17-2009, 02:20 PM	#18
sk8world 600rwhp club member. Join Date: Mar 2008 Posts: 551 Rep Power: 18	Thats the ticket... Go to the track and get a trap speed, that tells all.. I am trying to go back and find my stock twin dyno. It was 323 at around 13-14psi. Bottom line is stock twins are a blast to drive. I had mine going 7.8's in the 1/8th back 10yrs ago with just intake, exhaust, pettit IC and PFC computer. __________________ 6.? @ 11? drag pass http://www.youtube.com/watch?v=9wfxT2RMr7c

03-17-2009, 05:24 PM	#19
hades Rotary Fanatic Join Date: Mar 2008 Location: Freedom Land Posts: 316 Rep Power: 17	i assume everyone with full exhaust also port their wastegates and installed boost controllers? __________________ This is going to tear

03-18-2009, 11:57 AM	#21
albertomg Rotary Fan in Training Join Date: Feb 2008 Location: Bay Area CA Posts: 91 Rep Power: 18	Pretty cool. Would you happen to have a better view of the dyno plot? I'd like to see the low end of it as well. __________________ 93 Vintage Red R1 Power: Street Ported Motor, 99 Twins, V-mount, DP>SMB cat/MP> RB cat back, PFC, 1300cc secondaries, Fuel Pump, ACT clutch, RB lwfw, etc Steve Kan tuned - 310rwhp at 10PSI Suspension: Tripoint custom valved Koni + Ground Control coilovers, Eibach sway bars, SuperPro bushings, Corner Balanced and accurately aligned Brakes: RacingBrake 4 corner BBK SSR Integrale 17"x9" +45, Dunlop Star Specs 255/40

04-09-2009, 08:20 AM	#27
SPICcnmFD Rotary Fanatic Join Date: Feb 2008 Location: B'ham, AL Posts: 329 Rep Power: 18	Not necessarily. If they flow better, then 10psi is more hp than the one that doesn't flow as good, which is why most singles make more hp at the same boost level as twins. Boost is just backed up flow that can't get through the engine. __________________ 1993 Rx-7 SM2 #11 At the local AutoX: http://www.youtube.com/watch?v=9VOSQkkSLQs Speed for Sale shootout 2007: http://www.youtube.com/watch?v=JiqlyAkGmpg A few laps at Barbers: http://www.youtube.com/watch?v=6_h5q...x=0&playnext=1

03-17-2009, 09:42 PM	#20
dfoster154 Boost Addict Join Date: Aug 2008 Location: Elgin IL Posts: 13 Rep Power: 0	My wastegate is stock, and I have boost controlled by the PFC through Injector Duty Cycle. In the cold temps boost will push 13.5 psi, but in 60degree + I typicall top out at 12.5psi

03-24-2009, 02:45 PM	#24
the spyder Rotary Fan in Training Join Date: Jun 2008 Posts: 38 Rep Power: 0	Interesting. Im making 336whp on a 99 motor, twins, 93 PFC, full 3" exhaust, intakes, and stock intercooler. However I am maxing out my injectors, need to upgrade to a SMIC, and properly duct it. Looking for 360whp ish.

04-09-2009, 10:09 AM	#28
Chadwick Rotary Fanatic Join Date: Feb 2008 Location: Smyrna, TN, USA Posts: 239 Rep Power: 18	Also a more efficient turbo puts out less heat at the same pressure which will add to the HP gains. __________________ 93 RX7 BB (Race Car) 93 RX7 SSM (Soon to be IBM and a daily driver) 05 Silverado Z71 08 Mini Cooper 80 LS RX7 (for sale)

04-12-2009, 09:41 AM	#29
Doc-1 Rotary Fanatic Join Date: Feb 2008 Location: Madison Alabama Posts: 115 Rep Power: 18	The car has a y-pipe, exhaust with high flow cat, RB dual tip, down pipe, commander stand alone ecu, 99 spec turbo's, a careful rebuild on the engine, K&N air filter and Mazdaspeed inter-cooler. I expected about 300 HP to the rear wheels with this setup at 10 PSI and got 294, 12 PSI got me 314, about right. Intake is stock