331 W/ S-TRIM HAS NO POWER?

kreymis

Member

May 27, 2009

93

0

7

peekskill, ny

Jul 21, 2009

#1

• Jul 21, 2009

• #1

BASICALLY WHAT THE TITLE SAYS. ITS NOW ONLY RUNNING AT ABOUT 2-3 LBS OF BOOST SINCE I REPLACED THE LONGBLOCK. I HAVE AN APPT TO GET IT TUNED NEXT WEEK. IM HOPING THAT WILL CURE MY PROBLEM. WHAT SIZE PULLEY WILL I NEED TO GET THE BOOST UP TO ABOUT 9-10 LBS?

 

HankyGT

Member

Jan 15, 2006

81

3

6

Warren, OH

Jul 21, 2009

#2

• Jul 21, 2009

• #2

I dont think its possible to run 2-3 psi unless your have a massive boost leak or some seriously weird pulley choices on there. I'd go over it and then call vortech.

 

HankyGT

Member

Jan 15, 2006

81

3

6

Warren, OH

Jul 21, 2009

#3

• Jul 21, 2009

• #3

also check for belt slip

 

kreymis

Member

May 27, 2009

93

0

7

peekskill, ny

Jul 21, 2009

#4

• Jul 21, 2009

• #4

I DONT THINK I HAVE A LEAK BUT I SHOULD CHECK THE BELT. WILL A TUNE CURE MY POWER PROBLEM BECAUSE RIGHT NOW MY 4 CYLINDER ACCORD IS QUICKER AND THATS MY GAS MILEAGE CAR. ANYWAYS THE SHOP THATS TUNING THE CAR SAID THEY HAVE A 2.93 OR 2.95?? PULLEY IN STOCK. WHAT BOOST WOULD I SEE WITH THAT?

 

rock4451

20+ Year Stangneter

Nov 30, 2004

12

2

29

New Baden, IL

Jul 21, 2009

#5

• Jul 21, 2009

• #5

the first step to getting help with your car is buying a new keyboard without the caps lock button superglued. this will lead to more people being less annoyed with reading all caps posts being more likely to assist you

 

ProKiller

Founding Member

Apr 26, 2002

3,064

15

78

PA

Jul 21, 2009

#6

• Jul 21, 2009

• #6

boost is a measure of rescriction. you could run a 3.33 pulley and make 15lbs if your engine doesn't breath worth a crap. so the pulley size should be the least of your concern at the moment. what do you have on the car now? how is the timing? what did you set the baseline at?

 

kreymis

Member

May 27, 2009

93

0

7

peekskill, ny

Jul 21, 2009

#7

• Jul 21, 2009

• #7

timing is at 10 degrees. has stock pulley. the engine is a 331 ci longblock with trick flow 190 fast as cast heads and afm b31 cam.

 

Black95GTS

Active Member

Jan 8, 2004

1,644

3

38

Marlborough, MA

Jul 21, 2009

#8

• Jul 21, 2009

• #8

Possible you have a leaking intake manifold / blown head gasket. I would verify all mechanical work then proceed with tune. You don't want the tuner to band-aid a mechanical problem with software.

Adam

 

revhead347

Apparently my ex-husband made that mistake.

20+ Year Stangneter

Jun 14, 2004

9,297

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Acworth, GA

Jul 21, 2009

#9

• Jul 21, 2009

• #9

rock4451 said:

the first step to getting help with your car is buying a new keyboard without the caps lock button superglued. this will lead to more people being less annoyed with reading all caps posts being more likely to assist you

Click to expand...

Come on, you know the drill. Caps lock is the cruise control for e-thugs.

I'd start by trying to figure out why your only making 2lbs of boost. You probably have a huge boost leak. I saw a Cobra with a Procharger do the same thing, because it had an enormous boost leak.

Kurt

 

T

turbogt

Member

May 1, 2003

723

16

19

Montana

Jul 22, 2009

#10

• Jul 22, 2009

• #10

with those heads, you should need a 3.00 inch pulley to get 9-10#...

A 3.125 pulley will get you 10# on a stock engine, but yours will be flowing more air therefore loss boost with the same size pulley...

 

kreymis

Member

May 27, 2009

93

0

7

peekskill, ny

Jul 23, 2009

#11

• Jul 23, 2009

• #11

it goes in for the tune next week. i may purchase the 3.00 pulley so he can tune it w/ at least 9psi

 

GT_green_GT

New Member

Dec 31, 2005

118

0

0

Jul 26, 2009

#12

• Jul 26, 2009

• #12

Dude. the pulley or boost is not the problem. you didnt lose 8psi to better airflow. there is something physicaly wrong with ur car. whether its piping, intake leak, or blown hg. getting it tuned now would be stupid.

 

kreymis

Member

May 27, 2009

93

0

7

peekskill, ny

Aug 5, 2009

#13

• Aug 5, 2009

• #13

well i figure i lost about 3-4 psi since the swap. now i also have not really tried getting into throttle so far. i spoke to the guy who built the engine and he told me that without a tune im going to fell like im down 300 hp. the car runs horribly right now. the pulley will be here on friday then it goes in for the tune.

 

nmcgrawj

Advanced Member

Sep 28, 2003

3,651

4

68

Indianapolis, IN

Aug 5, 2009

#14

• Aug 5, 2009

• #14

Dont you have to pretty much go WOT to get boost?


LOL seems silly to me to talk about 2-3 lbs without even getting into the throttle. Never drove a vortech'd car so i dunno...

 

kreymis

Member

May 27, 2009

93

0

7

peekskill, ny

Aug 7, 2009

#15

• Aug 7, 2009

• #15

i just dont want to mash the throttle yet without the tune. i dont want to chance harming the engine.