How Much Boost?

BLOWN89 · January 14th, 2008, 06:06 PM

I have a 89 hatchback that has a vortech T trim on it. right now im only running 7LBS of boost for now but I would like to up it. It is a 302 punched out to 306 it has forged internals with windsor jr. heads, 520 cam, ported and polished cobra intake, a 1 to 1 fuel pressure regulator. it has a SCT chip that has a custom tune on it. How much boost can I run. Also how much more boost can I run without messing up the tune to much.

importdestroyer · January 23rd, 2008, 12:44 PM

If you have all the good internals, you can boost up 13-15 lbs with no problem. I had both a t-trim and a 17 lb ic procharger with my 331 combo. You will def. have to retune with extra boost.

TurboLX · January 23rd, 2008, 04:03 PM

all depends what your running for fuel, injector size and pump size

BLOWN89 · January 23rd, 2008, 05:10 PM

42 pound fuel injectors. and 255lph fuel pump. If i raised it 3 pounds would i need to retune

TurboLX · January 23rd, 2008, 05:18 PM

should be fine

jam77 · January 23rd, 2008, 08:54 PM

you running an inline pump to??

itschristorres8 · January 24th, 2008, 12:41 AM

Originally Posted by BLOWN89

42 pound fuel injectors. and 255lph fuel pump. If i raised it 3 pounds would i need to retune

depending on how much timing was pulled on the first tune
usually no

Goblin · January 24th, 2008, 12:16 PM

Didnt you ask this question in the 5.0 section?

BLOWN89 · January 25th, 2008, 05:48 PM

yea i posted this one first but didnt get a response for a few days so i posted it in the 5.0 section

Blown96Mystic · January 30th, 2008, 08:59 PM

I think 42's will be alright with around 13psi, just make sure your Fuel Pres. doesnt drop off. I would highly recommend a new tune before you get on it at all after a pulley swap.

January 14th, 2008, 06:06 PM	#1
BLOWN89 Regular 1989 mustang LX 11.42 @120 Join Date: Nov 2007 Location: Tulsa, Oklahoma Posts: 139 iTrader: 0 reviews	How Much Boost? I have a 89 hatchback that has a vortech T trim on it. right now im only running 7LBS of boost for now but I would like to up it. It is a 302 punched out to 306 it has forged internals with windsor jr. heads, 520 cam, ported and polished cobra intake, a 1 to 1 fuel pressure regulator. it has a SCT chip that has a custom tune on it. How much boost can I run. Also how much more boost can I run without messing up the tune to much. __________________ 89 hatch.....4,000 dollars..vortech supercharger kit.....3,800 dollars...built 306 windsor motor.....3,000 dollars beating a 75,000 dollar z06 corvette....PRICELESS UNTIL I SOLD THE CAR

January 23rd, 2008, 04:03 PM	#3
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	all depends what your running for fuel, injector size and pump size __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

January 23rd, 2008, 05:10 PM	#4
BLOWN89 Regular 1989 mustang LX 11.42 @120 Join Date: Nov 2007 Location: Tulsa, Oklahoma Posts: 139 iTrader: 0 reviews	42 pound fuel injectors. and 255lph fuel pump. If i raised it 3 pounds would i need to retune __________________ 89 hatch.....4,000 dollars..vortech supercharger kit.....3,800 dollars...built 306 windsor motor.....3,000 dollars beating a 75,000 dollar z06 corvette....PRICELESS UNTIL I SOLD THE CAR

January 23rd, 2008, 05:18 PM	#5
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	should be fine __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

January 23rd, 2008, 08:54 PM	#6
jam77 Enthusiast 1987 Mustang GT Join Date: Apr 2007 Location: IL Posts: 685 iTrader: 0 reviews	you running an inline pump to?? __________________ 87 GT, typhoon upper and lower,70mm tb, 90mm maf, bbk shorties, bbk x-pipe, flowmaster cat back, 3:73 gear, pro 5.0 shifter, novi blower,afm power pipe, load IO, Trick Flow heads, Anderson B-31 cam, Anderson PMS, 42 lb injectors, t-rex fuel pump.

January 23rd, 2008, 12:44 PM	#2
importdestroyer Regular 2004 Cobra Join Date: Jan 2008 Location: NC Posts: 110 iTrader: 0 reviews	If you have all the good internals, you can boost up 13-15 lbs with no problem. I had both a t-trim and a 17 lb ic procharger with my 331 combo. You will def. have to retune with extra boost.

January 24th, 2008, 12:16 PM	#8
Goblin Hardcore Enthusiast 88mm Join Date: Apr 2007 Location: Tucson, AZ Posts: 2,111 iTrader: 0 reviews	Didnt you ask this question in the 5.0 section? __________________

January 25th, 2008, 05:48 PM	#9
BLOWN89 Regular 1989 mustang LX 11.42 @120 Join Date: Nov 2007 Location: Tulsa, Oklahoma Posts: 139 iTrader: 0 reviews	yea i posted this one first but didnt get a response for a few days so i posted it in the 5.0 section __________________ 89 hatch.....4,000 dollars..vortech supercharger kit.....3,800 dollars...built 306 windsor motor.....3,000 dollars beating a 75,000 dollar z06 corvette....PRICELESS UNTIL I SOLD THE CAR

January 30th, 2008, 08:59 PM	#10
Blown96Mystic Newbie Join Date: Oct 2007 Posts: 25 iTrader: 0 reviews	I think 42's will be alright with around 13psi, just make sure your Fuel Pres. doesnt drop off. I would highly recommend a new tune before you get on it at all after a pulley swap.

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