User Tag List

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 10-23-2009, 10:41 PM   #1
Grabber's Avatar
Oh Hai
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Oh Hai
 
Grabber's Avatar
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Casino cash: $31255100
0.85 per day
Default Question on Vacuum/Boost Gauge

Just installed my Boost gauge, and I am not sure how to accurately read it.

It's a mechanical Autometer Vacuum/Boost gauge reading up to 30 PSI and 30 In.HG.

When I start the car, it reads on about 15-20in.HG. I hit the gas, and it goes to 10 PSI, and no further. My stock boost gauge buries and goes about 3/4 of an inch past 10 PSI.

What is your opinion guys?

PS- Buying an Electrical Gauge is not an option at this point. Bad gauge, vacuum leak, etc?

Thanks!

-Chris
__________________
2016 Durango R/T AWD - Billet Silver
2014 Track Pack GT - - Gone
2005 Blown 3V (Gone)
2004 CO Mach 1 (Slow as balls) (Gone)

2003 TR 10th Anni. Cobra (Gone )

Grabber is online now   Reply With Quote
Old 10-23-2009, 10:42 PM   #2
Zack's Avatar
4 Doors 4 Life
 
Join Date: Mar 2004
Location: NW Indiana
Posts: 6,295
4 Doors 4 Life
 
Zack's Avatar
 
Join Date: Mar 2004
Location: NW Indiana
Posts: 6,295
Casino cash: $8049900
1.12 per day
Default

Could be a bad gauge, could be a bad bypass valve on the eaton (or mis-adjusted)


OR you could be making 10 psi!
__________________
03 Marauder Whipple 3.4 [email protected] 715rwhp/655rwtq
03 Blue Marauder TurboCharged 620rwhp/626rwtq
93 Town Car 4V/Whipple 2.9 700rhwp/606rwtq
03 Black Marauder DD
1959 Cadillac!
Zack is offline   Reply With Quote
Old 10-23-2009, 10:45 PM   #3
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

check and make sure that shitty line is not kinked anywhere
__________________
Quote:
Originally Posted by Bub View Post
It's threads like this that makes life between masturbating worth living.
Tuned and Treated better by Tim @ Modular Powerhouse
blck10th is offline   Reply With Quote
Old 10-23-2009, 10:48 PM   #4
Grabber's Avatar
Oh Hai
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Oh Hai
 
Grabber's Avatar
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Casino cash: $31255100
0.85 per day
Default

Quote:
Originally Posted by Zack View Post
Could be a bad gauge, could be a bad bypass valve on the eaton (or mis-adjusted)

With my power level and the 2.76 PSI, I am pretty sure I am making more than 10 PSI.

OR you could be making 10 psi!
Quote:
Originally Posted by blck10th View Post
check and make sure that shitty line is not kinked anywhere

The line was kinked, but I cut it and re-connected it. From what we can see, it is not kinked anywhere. I'll check the lines on the Eaton and the Bypass Valve.
Grabber is online now   Reply With Quote
Old 10-23-2009, 11:17 PM   #5
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

what should it be at boost wise? 2.76? lower?
blck10th is offline   Reply With Quote
Old 10-23-2009, 11:34 PM   #6
Grabber's Avatar
Oh Hai
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Oh Hai
 
Grabber's Avatar
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Casino cash: $31255100
0.85 per day
Default

Quote:
Originally Posted by blck10th View Post
what should it be at boost wise? 2.76? lower?

Stock Lower. With the 2.76, I should be over 14PSI.

I've never heard of a Eaton Cobra with a Pulley swap, Stock Headers, Stock Lower Pulley making 462 RWHP and 486 RWTQ.
Grabber is online now   Reply With Quote
Old 10-23-2009, 11:41 PM   #7
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

Quote:
Originally Posted by Grabber View Post
Stock Lower. With the 2.76, I should be over 14PSI.

I've never heard of a Eaton Cobra with a Pulley swap, Stock Headers, Stock Lower Pulley making 462 RWHP and 486 RWTQ.
i only made 457. that is with stage 4 port. i need a lower. I only made 13.28 psi on the dyno
blck10th is offline   Reply With Quote
Old 10-23-2009, 11:45 PM   #8
01Sleeper's Avatar  
Join Date: Dec 2004
Posts: 3,333
 
01Sleeper's Avatar
 
Join Date: Dec 2004
Posts: 3,333
Casino cash: $11168800
0.62 per day
Default

i made 465rwhp with just a 2.76
01Sleeper is offline   Reply With Quote
Old 10-23-2009, 11:46 PM   #9
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

Quote:
Originally Posted by 01Sleeper View Post
i made 465rwhp with just a 2.76
blck10th is offline   Reply With Quote
Old 10-23-2009, 11:50 PM   #10
sonicblue2003's Avatar
AKA 1SLOWFOX
 
Join Date: Nov 2004
Location: woodridge
Posts: 2,309
AKA 1SLOWFOX
 
sonicblue2003's Avatar
 
Join Date: Nov 2004
Location: woodridge
Posts: 2,309
Casino cash: $5158000
0.43 per day
Default

with a 2.76 i made 457/492
__________________


I QUICK CREW...
sonicblue2003 is offline   Reply With Quote
Old 10-23-2009, 11:50 PM   #11
Grabber's Avatar
Oh Hai
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Oh Hai
 
Grabber's Avatar
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Casino cash: $31255100
0.85 per day
Default

Quote:
Originally Posted by 01Sleeper View Post
i made 465rwhp with just a 2.76

How much TQ? What type of temp. was it when you dyno'd?

Just Curious.

Also, how much boost were you running?
Grabber is online now   Reply With Quote
Old 10-24-2009, 12:59 AM   #12
IZZy's Avatar
Powered by ES
 
Join Date: Dec 2007
Posts: 38,985
Powered by ES
 
IZZy's Avatar
 
Join Date: Dec 2007
Posts: 38,985
Casino cash: $23496600
9.13 per day
Default

2.76 only I mAde 13psi
__________________
Quote:
Originally Posted by GLADIATOR View Post
I talk shit and never race....dats how I roll
"I have no idols. I admire work, dedication, and competence." -Ayrton Senna
IZZy is offline   Reply With Quote
Old 10-24-2009, 10:34 AM   #13
BlaqSnake's Avatar
PC Pimp
 
Join Date: May 2006
Location: Aurora, IL
Posts: 5,324
PC Pimp
 
BlaqSnake's Avatar
 
Join Date: May 2006
Location: Aurora, IL
Posts: 5,324
Casino cash: $13111500
1.10 per day
Default

2.76, stock lower, CAI, High flow mid pipe, and catback

13.3 # boost (I think) and 467 HP / 476 TQ
__________________
Dave

Torch Red 10th Anni. Cobra Vert (#539 of 2003)
BlaqSnake is offline   Reply With Quote
Old 10-24-2009, 12:09 PM   #14
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

What size belt are you running. i think you can fit a 74" belt if you cut the tab on the tensioner. I was using the stock size belt. it slippy.
blck10th is offline   Reply With Quote
Old 10-24-2009, 12:52 PM   #15
Bob_Kurgan's Avatar
Flyin_Hawaiin
 
Join Date: Feb 2005
Posts: 3,013
Flyin_Hawaiin
 
Bob_Kurgan's Avatar
 
Join Date: Feb 2005
Posts: 3,013
Casino cash: $4611400
0.57 per day
Default

most 2.76 pulleys at 6000rpm will make 12-13psi
__________________
Built by Kurgan Motorsports
Tuned by Kurgan Motorsports
4.75 @ 152 on 275 D.R.

Living large in NE Georgia...
Bob_Kurgan is offline   Reply With Quote
Old 10-24-2009, 06:02 PM   #16
Grabber's Avatar
Oh Hai
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Oh Hai
 
Grabber's Avatar
 
Join Date: Dec 2007
Location: Wheeling, IL
Posts: 3,618
Casino cash: $31255100
0.85 per day
Default

Running a 74.5 inch Belt. The belt that Billetflow suggests on their site for the 2.76 and 4 idlers.

Does it matter that my car peaks at about 6250? So, I am probably running 12-13 PSI?
Grabber is online now   Reply With Quote
Old 10-24-2009, 09:43 PM   #17
10thSVT_03's Avatar
DRRRT PROSPECT
 
Join Date: Feb 2009
Posts: 2,088
DRRRT PROSPECT
 
10thSVT_03's Avatar
 
Join Date: Feb 2009
Posts: 2,088
Casino cash: $21975100
0.55 per day
Default

Quote:
Originally Posted by blck10th View Post
i only made 457. that is with stage 4 port. i need a lower. I only made 13.28 psi on the dyno
I have the stage 4 port 2.76 upper 4lb lower and I made 210rwhp and 235rwtq @ 3lbs on 1 pull but was maxing out my stock injectors.. Once I get the 60lbrs we can turn it up again.. I think I am just at 190-200 now with it on a safe tune... I dont remember the belt size but it was slightly smaller than the Cobra Bob website recommended..
__________________


**Tuned by Tim @ Modular Powerhouse/Mr. Norms Garage **
10thSVT_03 is offline   Reply With Quote
Old 10-24-2009, 10:41 PM   #18
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

Quote:
Originally Posted by 10thSVT_03 View Post
I have the stage 4 port 2.76 upper 4lb lower and I made 510rwhp and 535rwtq @ 18lbs on 1 pull but was maxing out my stock injectors.. Once I get the 60lbrs we can turn it up again.. I think I am just at 490-500 now with it on a safe tune... I dont remember the belt size but it was slightly smaller than the Cobra Bob website recommended..
yeah i did not know i should get a lower when i did it
blck10th is offline   Reply With Quote
Old 10-24-2009, 11:07 PM   #19
10thSVT_03's Avatar
DRRRT PROSPECT
 
Join Date: Feb 2009
Posts: 2,088
DRRRT PROSPECT
 
10thSVT_03's Avatar
 
Join Date: Feb 2009
Posts: 2,088
Casino cash: $21975100
0.55 per day
Default

Quote:
Originally Posted by blck10th View Post
yeah i did not know i should get a lower when i did it
Do the 4lb lower and 60lb injectors and I don't know what intake your using but I like the JLT Ram air intake..
10thSVT_03 is offline   Reply With Quote
Old 10-24-2009, 11:09 PM   #20
blck10th's Avatar  
Join Date: Jan 2007
Posts: 17,963
 
blck10th's Avatar
 
Join Date: Jan 2007
Posts: 17,963
Casino cash: $7575727
3.90 per day
Default

Quote:
Originally Posted by 10thSVT_03 View Post
Do the 4lb lower and 60lb injectors and I don't know what intake your using but I like the JLT Ram air intake..
have had the 60's and just got the carbon fiber cai from jlt
blck10th is offline   Reply With Quote
Old 10-24-2009, 11:11 PM   #21
10thSVT_03's Avatar
DRRRT PROSPECT
 
Join Date: Feb 2009
Posts: 2,088
DRRRT PROSPECT
 
10thSVT_03's Avatar
 
Join Date: Feb 2009
Posts: 2,088
Casino cash: $21975100
0.55 per day
Default

Quote:
Originally Posted by blck10th View Post
have had the 60's and just got the carbon fiber cai from jlt
Yeah I wish would have bought them before my tune.. The JLT I bought from Kurgan when I got the tune.... I'm curious as to how my car will do when I get a new clutch also.. High revving its hard to get in gear....
10thSVT_03 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 12:59 AM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
User Alert System provided by Advanced User Tagging v3.0.6 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
no new posts