How much boost for stock engine

Lauri · February 22nd, 2008, 12:45 PM

I have all stock 89, and i'm installing a Kenne Bell. It's got 8psi pulley, but i'm going to get underdrive crank pulley to reduce boost. But would it be safe to run 8psi, i'm guessing no, cause still got 19lbs injectors.

TurboLX · February 22nd, 2008, 12:53 PM

it all depends on the tune, fuel, fuel system, timing, etc...

Lauri · February 22nd, 2008, 01:25 PM

yea yea, but that all comes later when i have money for them. Now i'm putting just the s/c kit. For future i also have 10 and 12 psi pulleys.

87StangLX · February 22nd, 2008, 01:56 PM

i'm pretty sure that you're gonna need bigger than 19lb injectors. somewhere around 38-42 lb would be better. also a bigger fuel pump (possibly), unless you got the kb boost-a-pump system.

Goblin · February 22nd, 2008, 03:22 PM

Your stock 19lb'ers will be fine for 8psi.

TKOTLARZ · February 22nd, 2008, 03:31 PM

no, you are gonna need injectors..and a bigger pump..i dont even have a supercharger and i need bigger injectors...get around 38

ryans88gt · February 22nd, 2008, 03:41 PM

Vortech kits have been made for decades that are designed for 19 lb injectors.

You need a T-rex external pump and an FMU, both of which come in vortech's kit.

Goblin · February 22nd, 2008, 03:43 PM

Originally Posted by TKOTLARZ

no, you are gonna need injectors..and a bigger pump..i dont even have a supercharger and i need bigger injectors...get around 38

You dont need bigger injectors OR pump with 8psi. Ive spoke with reps at Kenne Bell, and Jim himself many times, because i really wanted one of their 2.2s for along time. With a 6-8psi pulley arrangment, you dont need bigger injectors or a bigger fuel pump.

JBIGBOOTSY · February 22nd, 2008, 08:23 PM

As much boost as possible with out breaking the engine.

rodthrower2.3T · February 22nd, 2008, 08:35 PM

i would atleast recommend a fuel pump

stock pumps cant keep up with much, only 88 lph

im just saying lol

HMUSN · February 22nd, 2008, 08:36 PM

get the injectors and the pump.. what's $500.00 in parts over $3000.00 for a new motor?

teal89 · February 23rd, 2008, 04:10 AM

Originally Posted by ryans88gt

Vortech kits have been made for decades that are designed for 19 lb injectors.

You need a T-rex external pump and an FMU, both of which come in vortech's kit.

+1, the ad on my jegs book does not have a star by the order number stating it needs bigger injectors. Also I've seen ever so slightly modifed stangs with just a cam, chip re-program, and bbk shorties make 415hp on stock injectors.

8psi is make for your car, you have the compression for it, plus your stock pump flows more than 45-55psi right? So run to autozone, snag a good timing light(Keep your receipt), come home and install the damn S/C, use your timing light and time your car perfect(Perferablly on 89 oct) or 87 with octane booster(SThe silver can from autozone) test it out, do your final timing, return your timing light and get your 80 bucks back, get a short throw shifter and let's starts fucking around with some Zo6's and maybe a C6. I aint no punk bitch LOL

Drick · February 23rd, 2008, 04:15 AM

You can buy that vortech kit from Summit

teal89 · February 23rd, 2008, 04:19 AM

I have an old summit book. All they have is Chevy's on it

Drick · February 23rd, 2008, 04:23 AM

Ill get it dont worry

Drick · February 23rd, 2008, 04:24 AM

http://store.summitracing.com/partdetail.asp?autofilter=1&part=VOR%2D4FA218%2D04 0SQ&N=700+0&autoview=sku

Lauri · February 23rd, 2008, 11:08 AM

Originally Posted by HMUSN

get the injectors and the pump.. what's $500.00 in parts over $3000.00 for a new motor?

Yes, i will buy them, and i think the same way as you about extra 500. Only problem is that i don't have $500 to spend now. Hell, i don't have even $100 now because i had to buy new computer and fix my daily driver.

I don't even know how much boost i'll get with underdrive crank pulley, but maybe it's safer to not try with stock crank pulley. Hopefully i got the willpower to stay lo boost...

My main goal is not to get max power right away, but to get it running and one dyno pull. Next winter is time to build some more.

teal89 · February 23rd, 2008, 05:07 PM

You want an accurate answer... wait on "JBIGBoosty" or "Darrell" both of them will tell you what you need and I would listen to them. My two cents? If anything bump up your injectors so you'll have something to play with. You don't need a pump just for 8psi, your injectors by stock will flow around 70'ish at idle and 75 at daily drive speed, and them 76-79 at full throttle. so you still have 9psi to work with so you'll be fine.

Then later on you can bump up your jectors and a BBK fuel pump or better yet... AEROMOTIVE Fuel pump

JBIGBOOTSY · February 23rd, 2008, 09:34 PM

Originally Posted by ryans88gt

Vortech kits have been made for decades that are designed for 19 lb injectors.

You need a T-rex external pump and an FMU, both of which come in vortech's kit.

+1. If you don't have a FMU, you'll need some injectors, and a custom chip, or programable engine management.

tension · February 23rd, 2008, 09:36 PM

Totally bone stock 10psi

February 22nd, 2008, 12:45 PM	#1
Lauri Newbie 1989 GT Join Date: Jan 2007 Location: Finland Posts: 29 iTrader: 0 reviews	How much boost for stock engine I have all stock 89, and i'm installing a Kenne Bell. It's got 8psi pulley, but i'm going to get underdrive crank pulley to reduce boost. But would it be safe to run 8psi, i'm guessing no, cause still got 19lbs injectors.

February 22nd, 2008, 12:53 PM	#2
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,792 Blog Entries: 1 iTrader: 0 reviews	it all depends on the tune, fuel, fuel system, timing, etc... __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

February 22nd, 2008, 03:22 PM	#5
Goblin Hardcore Enthusiast 88mm Join Date: Apr 2007 Location: Tucson, AZ Posts: 2,111 iTrader: 0 reviews	Your stock 19lb'ers will be fine for 8psi. __________________

February 22nd, 2008, 03:31 PM	#6
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	no, you are gonna need injectors..and a bigger pump..i dont even have a supercharger and i need bigger injectors...get around 38 __________________ Cohagan Engineering, Inc.

February 22nd, 2008, 03:41 PM	#7
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,627 iTrader: 0 reviews	Vortech kits have been made for decades that are designed for 19 lb injectors. You need a T-rex external pump and an FMU, both of which come in vortech's kit. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

February 22nd, 2008, 01:25 PM	#3
Lauri Newbie 1989 GT Join Date: Jan 2007 Location: Finland Posts: 29 iTrader: 0 reviews	yea yea, but that all comes later when i have money for them. Now i'm putting just the s/c kit. For future i also have 10 and 12 psi pulleys.

February 22nd, 2008, 01:56 PM	#4
87StangLX Regular Join Date: Jul 2007 Posts: 201 iTrader: 0 reviews	i'm pretty sure that you're gonna need bigger than 19lb injectors. somewhere around 38-42 lb would be better. also a bigger fuel pump (possibly), unless you got the kb boost-a-pump system.

February 22nd, 2008, 08:23 PM	#9
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,392 iTrader: 0 reviews	As much boost as possible with out breaking the engine. __________________ Bolt-on Abraham Lincoln Log motor. With extra wiring.

February 22nd, 2008, 08:35 PM	#10
rodthrower2.3T Regular 88 TurboChicken 8.40/83.4 Join Date: Sep 2007 Location: hobart, IN~W.Lafayette@Purdue Posts: 148 iTrader: 0 reviews	i would atleast recommend a fuel pump stock pumps cant keep up with much, only 88 lph im just saying lol

February 22nd, 2008, 08:36 PM	#11
HMUSN Doc 1986 SVO Join Date: Nov 2006 Posts: 36,836 iTrader: 9 reviews	get the injectors and the pump.. what's $500.00 in parts over $3000.00 for a new motor? __________________

February 23rd, 2008, 04:15 AM	#13
Drick Big timin' in a small town 2004 FX4 F150, 86 GT Join Date: Apr 2007 Location: Gods country. Nordern Michigan eh Posts: 14,365 iTrader: 1 reviews	You can buy that vortech kit from Summit __________________ FX4 Crew Crew member #1 Don't take anything I say to heart, I don't try to come off as an asshole. It just happens

February 23rd, 2008, 04:19 AM	#14
teal89 Enthusiast 89 Mustang Lx Join Date: Feb 2008 Location: Rockwall, Texas Posts: 527 iTrader: 0 reviews	I have an old summit book. All they have is Chevy's on it __________________ 94-95 306, B-Cam, Off-brand BBK Like Headers, H-Pipe, 3.73's, Nitrous Wet Shot 175 Shot

February 23rd, 2008, 04:23 AM	#15
Drick Big timin' in a small town 2004 FX4 F150, 86 GT Join Date: Apr 2007 Location: Gods country. Nordern Michigan eh Posts: 14,365 iTrader: 1 reviews	Ill get it dont worry __________________ FX4 Crew Crew member #1 Don't take anything I say to heart, I don't try to come off as an asshole. It just happens

February 23rd, 2008, 04:24 AM	#16
Drick Big timin' in a small town 2004 FX4 F150, 86 GT Join Date: Apr 2007 Location: Gods country. Nordern Michigan eh Posts: 14,365 iTrader: 1 reviews	http://store.summitracing.com/partdetail.asp?autofilter=1&part=VOR%2D4FA218%2D04 0SQ&N=700+0&autoview=sku __________________ FX4 Crew Crew member #1 Don't take anything I say to heart, I don't try to come off as an asshole. It just happens

February 23rd, 2008, 05:07 PM	#18
teal89 Enthusiast 89 Mustang Lx Join Date: Feb 2008 Location: Rockwall, Texas Posts: 527 iTrader: 0 reviews	You want an accurate answer... wait on "JBIGBoosty" or "Darrell" both of them will tell you what you need and I would listen to them. My two cents? If anything bump up your injectors so you'll have something to play with. You don't need a pump just for 8psi, your injectors by stock will flow around 70'ish at idle and 75 at daily drive speed, and them 76-79 at full throttle. so you still have 9psi to work with so you'll be fine. Then later on you can bump up your jectors and a BBK fuel pump or better yet... AEROMOTIVE Fuel pump __________________ 94-95 306, B-Cam, Off-brand BBK Like Headers, H-Pipe, 3.73's, Nitrous Wet Shot 175 Shot

February 23rd, 2008, 09:36 PM	#20
tension Newbie Join Date: Feb 2008 Posts: 12 iTrader: 0 reviews	Totally bone stock 10psi

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