DSM sidemounts+9B/13G+450cc inj+SAFC=What boost? - 3000GT/Stealth International Message Center

92RT-TT · 05-09-2008, 02:04 AM

Here is my question for all you experts out there, I just bought some DSM 450 blacktop injectors, an SAFC, and A hotwire kit and in a day I'll have a walbro 255 too. My plan is to buy a 13G and do a 13G/9B combo.

Correct me if I'm wrong but normally wont a 9b just blow hot air past I think I've read people say 15 psi? But the 13G should be good for a little over that, so my question is, if I put on some DSM sidemount intercoolers, could I run 15-17 lbs of boost and not have the 9b killing any of the 13g's gains at the high boost levels?
My reasoning (which may be flawed, I'm a noob at this stuff

) was that while the 9b probably would be pushing alot of hot air, the dsm smic would cool it down and then the 13g's boost would make for that and allow me to still post some good power gains over running this combo just at 14-15 psi.

Thanks for taking the time to look at this, I'm a noob when it comes to upgrading these cars really so I'm just going off of what I've read and what assumptions I've made (hopefully correctly lol).

And the reason I am running or will be running a 13g/9b combo is because I am trying to be semi-cost efficient. I've got a couple other projects in the works so I cant devote 100% of my car money to this, but I still want to modify it a little and have some fun

q2418130103p · 05-09-2008, 05:37 AM

take what i say with a grain of salt, I also dont really know.

I believe one of hte few benefits of running 9b/13g combo is that they deliver their power in different power bands, the 9b will have power in lower rpms, while the 13g will have power in higher rpm ranges.

as far as what pressure to run... try a low number and go up until you start excessivly knocking (or rather when you timing starts getting pulled hard)

Struggly · 05-09-2008, 06:45 AM

Every car is different. Start with reasonable boost, log, and increase slowly until you lean out or knock.

If you just want a very general idea, I run 1.1 kg/cm2 on virtually the same setup.

Clint

92RT-TT · 05-09-2008, 08:59 AM

Quote:

Originally Posted by Struggly

Every car is different. Start with reasonable boost, log, and increase slowly until you lean out or knock.

If you just want a very general idea, I run 1.1 kg/cm2 on virtually the same setup.

Clint

thanks you two... yeah thats sounds like the safest bet... just log and turn it up slowly.

92RT-TT · 05-09-2008, 09:01 AM

sorry if this is a really noob question... but how many psi in lbs is 1.1kg/cm^2? I tried looking it up via google and no luck lol???

92StealthTT · 05-09-2008, 10:31 AM

Online Conversion - Pressure Conversion

1.1 kilogram-force/square centimeter = 15.645 677 668 pound/square inch

92RT-TT · 05-09-2008, 09:46 PM

Quote:

Originally Posted by 92StealthTT

Online Conversion - Pressure Conversion

1.1 kilogram-force/square centimeter = 15.645 677 668 pound/square inch

thanks for the link and the info

05-09-2008, 02:04 AM	#1 (permalink)
92RT-TT Mr. Cheese Join Date: Oct 2007 Location: Hudson, WI Drives: 92 RT/TT & 92 RT/TT Trader Rating: (14)	DSM sidemounts+9B/13G+450cc inj+SAFC=What boost? Here is my question for all you experts out there, I just bought some DSM 450 blacktop injectors, an SAFC, and A hotwire kit and in a day I'll have a walbro 255 too. My plan is to buy a 13G and do a 13G/9B combo. Correct me if I'm wrong but normally wont a 9b just blow hot air past I think I've read people say 15 psi? But the 13G should be good for a little over that, so my question is, if I put on some DSM sidemount intercoolers, could I run 15-17 lbs of boost and not have the 9b killing any of the 13g's gains at the high boost levels? My reasoning (which may be flawed, I'm a noob at this stuff ) was that while the 9b probably would be pushing alot of hot air, the dsm smic would cool it down and then the 13g's boost would make for that and allow me to still post some good power gains over running this combo just at 14-15 psi. Thanks for taking the time to look at this, I'm a noob when it comes to upgrading these cars really so I'm just going off of what I've read and what assumptions I've made (hopefully correctly lol). And the reason I am running or will be running a 13g/9b combo is because I am trying to be semi-cost efficient. I've got a couple other projects in the works so I cant devote 100% of my car money to this, but I still want to modify it a little and have some fun __________________ 1992 Dodge Stealth RT-Twin Turbo 64,000 miles, Stored Winters, AEM Tru-Boost, Greddy Type S BOV, DNP Y-Pipe and Intake Pipes, Palm MMCD, Tein S-Tech Springs, Brembo Rotors, MSD Wires, K&N FIPK, EGR Delete, Vacuum Reduction, Cianci 3 Gauge A-Pillar, 5zigen FN01R-C 18x9.5's wrapped in BFG KDW 265-35-18's. 13% Tint, 12 Disc CD changer, Greddy Turbo Timer.

05-09-2008, 05:37 AM	#2 (permalink)
q2418130103p Forum Member Join Date: Sep 2004 Location: Johnston, RI Drives: 1993 Mits 3000gt VR4 Trader Rating: (3)	Re: DSM sidemounts+9B/13G+450cc inj+SAFC=What boost? take what i say with a grain of salt, I also dont really know. I believe one of hte few benefits of running 9b/13g combo is that they deliver their power in different power bands, the 9b will have power in lower rpms, while the 13g will have power in higher rpm ranges. as far as what pressure to run... try a low number and go up until you start excessivly knocking (or rather when you timing starts getting pulled hard) __________________ Want to Buy: Door Interior with no bubbles

05-09-2008, 06:45 AM	#3 (permalink)
Struggly 3SX FTL Join Date: Sep 2000 Location: Chelmsford, MA Drives: Viciously Trader Rating: (5)	Re: DSM sidemounts+9B/13G+450cc inj+SAFC=What boost? Every car is different. Start with reasonable boost, log, and increase slowly until you lean out or knock. If you just want a very general idea, I run 1.1 kg/cm2 on virtually the same setup. Clint __________________ The Pansy Patrol 1995 3000GT VR-4 but real niggaz don't give a fuck: V1, comprehensive denastificizzle, vishizzous accessory biznelt mod, K&N, Greddy Profec B S-P-to-tha-izzec II, S-AFC, Walbro 341, DSM 450s, n AEM UEGO; battery relocizzle K-R-to-tha-izzank Vents, EK2MFG fizzle rizzle loop n plenum spaca, lethal_vr4 manual gang bangin' rizzay, SKVR4 AWS delete, polyurethane motor mounts, adjustable control arms, SS brakes lines, n EGR blockoffs; Custom brakes lines wit cockpit-mounted adjustable proportion'n valve, 332mm Stoptechs, Carbotech Brotha Plus/Porterfield Rizzle ATE Pusha Blue, OZ Gang Bangin' F1 Plus 17x9.5 +36mm, Yokohama AVS ES100 275/40/17, Tein Fizzle w/EDFC n SCE Casta/Camba Plates, SCE oilpan, DSM sidemounts, DN Precat Eliminizzles 13G/9B combo (9psi springs), J-spec final drive, RPS flyhweel n Spec II clutch, IPO propane, ATR downpipe, tizzest pipe, n Single Shot 1994 Mazda Protege DX: 253K miles, DOHC 1.8L swap, rear disc brake conversion, poorly-designed header, some cheap-ass suspension upgrades, Carbotech Panther Plus, Miata wheels, other crap here and there, arguably the fastest piece of shit in New England and no one can do anything about it

05-09-2008, 09:01 AM	#5 (permalink)
92RT-TT Mr. Cheese Join Date: Oct 2007 Location: Hudson, WI Drives: 92 RT/TT & 92 RT/TT Trader Rating: (14)	Re: DSM sidemounts+9B/13G+450cc inj+SAFC=What boost? sorry if this is a really noob question... but how many psi in lbs is 1.1kg/cm^2? I tried looking it up via google and no luck lol???

05-09-2008, 10:31 AM	#6 (permalink)
92StealthTT Dare to be Stupid Join Date: Apr 2001 Location: Omaha Drives: 92 Stealth RT/TT Trader Rating: (23)	Re: DSM sidemounts+9B/13G+450cc inj+SAFC=What boost? Online Conversion - Pressure Conversion 1.1 kilogram-force/square centimeter = 15.645 677 668 pound/square inch __________________

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