Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > Forced Induction
Sign in using an external account
Register Forgot Password?
Search

Forced Induction
Superchargers | Turbochargers | Intercoolers
Sponsored by
RPM Motorsports

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 08-22-2010, 01:14 PM   #1
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default Procharger D1SC w/ 3.85 pulley, 3lbs?

Hey guys,

This is in a Florida climate...with a rough tune at the moment.

My setup is a 04' ls6 with a vindicator cam and supporting valve train, ls2 manifold and 90mm TB, 1 7/8 headers, 6 rib D1SC with 3.85 pulley and 6" crank pulley. I have a front mount ic, greddy type s bov with 3" ic piping.

I just installed the procharger and I am only seeing 3 lbs of boost.... I have disconnected the BOV to rule that out, didnt help still 3 lbs. I also pressurized my system to look for leaks up to 12 lbs and there were none. The belt is nice and tight with good alignment.

Do you think this is common with my setup? Should I run a smaller pulley to achieve 8-9 lbs of boost, if so what pulley? I will be upgrading to an 8 rib but i want to make sure this setup works before more money goes into it.

Any help would be appreciated!

Zak

Update
*************If you dont want to problem shoot and read through this post the issue was my font mount intercooler.************

Last edited by tictakman; 09-23-2010 at 05:03 PM.. Reason: Update
tictakman is offline   Reply With Quote
Old 08-22-2010, 02:22 PM   #2
Customizing Director
Garage is empty, add now
 
MadIceV8's Avatar
 
Trader Rating: 12
Join Date: Mar 2002
Location: SW Chicago, IL
Posts: 5,771
Send a message via AIM to MadIceV8
Default

Same issue myself and I'm running a 3.4" pulley. I still have to check for leaks though.
__________________

2000 Chevrolet Camaro Z28
Fender Roller for Rent - Click Here
MadIceV8 is offline   Reply With Quote
Old 08-22-2010, 03:09 PM   #3
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

haha, hopefully we can find out if its correct. I have searched through the forums to find a similar setup and the boost level achieved but havent had any luck. Im thinking/hoping its correct per altitude....

Ill call procharger tomorrow if i dont hear anything today.

Z
tictakman is offline   Reply With Quote
Old 08-22-2010, 07:56 PM   #4
TECH Addict
Garage is empty, add now
 
NoGo's Avatar
 
Trader Rating: 2
Join Date: Jan 2002
Location: Rhode Island
Posts: 2,622
Default

Quote:
Originally Posted by MadIceV8 View Post
Same issue myself and I'm running a 3.4" pulley. I still have to check for leaks though.
As a point of reference I made 14 lbs of boost at 5800 rpm on a 3.3 pulley w/ a 383 ci motor. I run 17 psi now on a 3.1 S/C pulley and 7.85" (I think) crank.

I ran a 3.85 6 rib for a short period and ended up changing it due to belt slip. Any belt dust?
__________________
-Kevin

383 Supercharged '00 TA
699 HP
676 Tq
NoGo is offline   Reply With Quote
Old 08-22-2010, 08:00 PM   #5
TECH Apprentice
Garage is empty, add now
 
01boydws6's Avatar
 
Trader Rating: 16
Join Date: Jan 2008
Location: Bethlehem, Pa
Posts: 336
Default

Is it possible your cam is causing boost to bleed off
__________________
19"evos, sfc, 4pt cage,prokit, lt's, 3" ovaled x-pipe, magnaflow true duals, under the axle tail pipes, 3.73 gears, liberty built 6-speed, fmic procharged,F1A,
80lb injectors,racetronix hotwire, twin 340's ,
630/534
Race Proven Motorsports Tune

GM HIGH TECH STREET HEAT APRIL '12
01boydws6 is offline   Reply With Quote
Old 08-22-2010, 08:47 PM   #6
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

not sure on the cam stuff but i dont have any dust on the mounts or anything. It seems to boost fine and quickly to that 3 lbs...just not more haha.
tictakman is offline   Reply With Quote
Old 08-23-2010, 05:48 AM   #7
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

I wanted to add that I was previously turbocharged and didnt seem to have problems building boost then. I was at 4lbs of boost hitting 455 rwhp.


Z
tictakman is offline   Reply With Quote
Old 08-23-2010, 05:54 AM   #8
LS1Tech Sponsor
Garage is empty, add now
 
Bob@BruteSpeed's Avatar
 
Trader Rating: 15
Join Date: Mar 2003
Location: Roanoke, In
Posts: 18,783
Default

On a stock '99 Z28 with headers and exhaust, I saw 7 lbs of boost with a D-1SC 6 rib. Same 6.0 crank pulley and it had a 4.0 pulley on the head unit. I would think your cam is bleeding off several pounds of boost, but I'd say you should be seeing more than 3 psi of boost. I'd first rule out a faulty boost gauge. Bob
__________________
ATI ProCharger and Moser Sales 260 672-2076

ProCharger price increase coming on 11/3/14!!!

https://www.brutespeed.com/index.htm Link to website


Bob@BruteSpeed is online now   Reply With Quote
Old 08-23-2010, 08:23 AM   #9
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

I dont think its the boost gauge, I had a rear mount turbo right before this and was at 8lbs of boost which read correctly on a dyno tune as well. The power that the procharger is putting down feels like only 3 lbs as well.

The cam didnt feel like it was robbing power with the turbo application that I had on previously...
tictakman is offline   Reply With Quote
Old 08-23-2010, 08:44 AM   #10
Contrarian™
Garage is empty, add now
 
'Trust''s Avatar
 
Trader Rating: 24
Join Date: Aug 2004
Location: Eternity
Posts: 7,993
Default

That cam looks to have a least +10* of overlap, you are probably bleeding a lot of it into the valvetrain. You need a different cam.

Also, while you're at it, ditch the 6 rib. I had trouble getting my 8 rib to not slip even at 14psi on a 3.7" pulley.

Quote:
Originally Posted by NoGo View Post
As a point of reference I made 14 lbs of boost at 5800 rpm on a 3.3 pulley w/ a 383 ci motor. I run 17 psi now on a 3.1 S/C pulley and 7.85" (I think) crank.

I ran a 3.85 6 rib for a short period and ended up changing it due to belt slip. Any belt dust?
You can't compare setups like that, CR, stroke, CI, heads, cam etc. all will change how much boost a car see's on a given setup. For example, I made 14.7psi on a 3.7" pulley, 20psi on a 3.4", and 21psi on a Riechard 3.1" on a 396 with the ATI dampener. Completely different to your results.
__________________
LP560-4 Gallardo UGR 2R / ADV05TS' / OEM SL Wing / 6 Speed
F10 M5 Space Grey / Downpipes / Tune / Lowered / Grilles
CTS-V Sedan Slammed / 20" M147's / V2V Lip / Daily
'Trust' is offline   Reply With Quote
Old 08-23-2010, 08:48 AM   #11
TECH Addict
Garage is empty, add now
 
NoGo's Avatar
 
Trader Rating: 2
Join Date: Jan 2002
Location: Rhode Island
Posts: 2,622
Default

That's why I said point of reference.....

Point being his boost looks low.
__________________
-Kevin

383 Supercharged '00 TA
699 HP
676 Tq
NoGo is offline   Reply With Quote
Old 08-23-2010, 09:06 AM   #12
Contrarian™
Garage is empty, add now
 
'Trust''s Avatar
 
Trader Rating: 24
Join Date: Aug 2004
Location: Eternity
Posts: 7,993
Default

Quote:
Originally Posted by NoGo View Post
That's why I said point of reference.....

Point being his boost looks low.

My point was you don't want the OP to put expectation on something based on what you made. His setup is completely different, and although it should technically make more boost on a smaller motor there are too many variables to provide a valid point of reference. Your 383 v. his 347 alone is enough to muddy the water. Just my .02.
__________________
LP560-4 Gallardo UGR 2R / ADV05TS' / OEM SL Wing / 6 Speed
F10 M5 Space Grey / Downpipes / Tune / Lowered / Grilles
CTS-V Sedan Slammed / 20" M147's / V2V Lip / Daily
'Trust' is offline   Reply With Quote
Old 08-23-2010, 09:41 AM   #13
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

Ill start searching for a good cam to go with on here and order one. I know there are a few people that make the 8 rib setup, do you suggest one over the other?
tictakman is offline   Reply With Quote
Old 08-23-2010, 09:46 AM   #14
TECH Addict
Garage is empty, add now
 
NoGo's Avatar
 
Trader Rating: 2
Join Date: Jan 2002
Location: Rhode Island
Posts: 2,622
Default

I prefer the SDCE. My advice would be to avoid a solid tensioner setup.

I went through a few different setups before finally settling on what I have now:
SDCE tensioner setup, ATI Balancer - crank pulley bolted to the front of it, Reichard Racing supercharger pulley. I run a napa belt, nothing fancy. This belt setup went 20k without any issues until the supercharger failed a few weeks ago and caused the belt to snap.

I sized a cam with -2 deg overlap. If I remember correctly the overlap numbers that they give you over the phone are at 50 thou lift, so a 0 deg overlap cap may **** through a little still....maybe someone else can clarify.
__________________
-Kevin

383 Supercharged '00 TA
699 HP
676 Tq
NoGo is offline   Reply With Quote
Old 08-23-2010, 10:08 AM   #15
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

I appreciate the guidance, ill start ordering the 8 rib stuff this week!
tictakman is offline   Reply With Quote
Old 08-23-2010, 11:35 AM   #16
Contrarian™
Garage is empty, add now
 
'Trust''s Avatar
 
Trader Rating: 24
Join Date: Aug 2004
Location: Eternity
Posts: 7,993
Default

If you get a chance, check out ChevyChad's belt wrap fix (basically machining one of the stand-off's on the blower bracket and putting a pulley on it). Much more cost effective than the outrageous SDCE setup.
__________________
LP560-4 Gallardo UGR 2R / ADV05TS' / OEM SL Wing / 6 Speed
F10 M5 Space Grey / Downpipes / Tune / Lowered / Grilles
CTS-V Sedan Slammed / 20" M147's / V2V Lip / Daily
'Trust' is offline   Reply With Quote
Old 08-23-2010, 01:05 PM   #17
Teching In
Garage is empty, add now
 
Trader Rating: 6
Join Date: Jul 2006
Posts: 44
Default

haha, i did stumble on that post! Ill check that out too since I wont have to spend much on that.

Can you explain why the cam could cause boost to "bleed" off? Is it leaving the valves open too long?
tictakman is offline   Reply With Quote
Old 08-23-2010, 01:13 PM   #18
TECH Addict
Garage is empty, add now
 
NoGo's Avatar
 
Trader Rating: 2
Join Date: Jan 2002
Location: Rhode Island
Posts: 2,622
Default

I would skip to the SDCE, but feel free to experment. Most of us have as well.

The overlap hangs the intake and the exhaust valves open simultaneously. In a N/A application this allows better scavenging of the combustion chamber of combustion gasses and helps to "jump" start the inlet tract velocity.

In a forced induction application the intake is at a much higher pressure then your exhaust so the scavenging overlap is either not needed or should be greatly reduced. Inlet air simply goes in the inlet valve and out the exhaust valve during the overlap. This bleeds your boost down, loads up your supercharger, and can result in a setup that has high parasitic loads on the supercharger, and low inlet pressures.

For the record though, I have never seen a setup bleed down to 3 psi of boost, but I haven't seen them all. I suspect other issues...probably in concert with your cam.... like belt slip.
__________________
-Kevin

383 Supercharged '00 TA
699 HP
676 Tq
NoGo is offline   Reply With Quote
Old 08-23-2010, 01:36 PM   #19
Contrarian™
Garage is empty, add now
 
'Trust''s Avatar
 
Trader Rating: 24
Join Date: Aug 2004
Location: Eternity
Posts: 7,993
Default

Quote:
Originally Posted by NoGo View Post
I would skip to the SDCE, but feel free to experment. Most of us have as well.
I never had a problem with slippage until I went to the 3.1, on the stock style manual tensioner. Which belts are you using? Gatorbacks were horrible for me, always had good luck with Gates.

Quote:
Originally Posted by NoGo View Post
The overlap hangs the intake and the exhaust valves open simultaneously. In a N/A application this allows better scavenging of the combustion chamber of combustion gasses and helps to "jump" start the inlet tract velocity.

In a forced induction application the intake is at a much higher pressure then your exhaust so the scavenging overlap is either not needed or should be greatly reduced. Inlet air simply goes in the inlet valve and out the exhaust valve during the overlap. This bleeds your boost down, loads up your supercharger, and can result in a setup that has high parasitic loads on the supercharger, and low inlet pressures.

For the record though, I have never seen a setup bleed down to 3 psi of boost, but I haven't seen them all. I suspect other issues...probably in concert with your cam.... like belt slip.
x2 on the above. Thorough description.
__________________
LP560-4 Gallardo UGR 2R / ADV05TS' / OEM SL Wing / 6 Speed
F10 M5 Space Grey / Downpipes / Tune / Lowered / Grilles
CTS-V Sedan Slammed / 20" M147's / V2V Lip / Daily
'Trust' is offline   Reply With Quote
Old 08-23-2010, 01:55 PM   #20
TECH Enthusiast
1997 Chevrolet Camaro
 
Trader Rating: 4
Join Date: Mar 2009
Posts: 509
Default

I have a lt1 with a vortech v1 kit. I was only getting about 2 psi and couldnt figure out why. there wasnt any dust around the pulley but I made a second tentioner to get better belt wrap. and just put a smaller pulley and now I see 6 psi. I have a 6 inch crank pulley and I went from a 3.33 to a 2.95
__________________
97 Camaro lt1, built t-56 by nick at newtech, spec stage 2 clutch, ritchmond 4.10s, BMR adj. torqe arm, best et. 13.57 at 103.2 mph 2.02 60' on street tires N/A.
New set up in the works: forged 383 and a V7 YSI
1toofastlt1 is offline   Reply With Quote
Old 08-23-2010, 01:55 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
04, 20, 33, 370, ati, belt, blower, boost, d1sc, gt, make, procharger, psi, pulley, referance, size


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
COMPLETE D1SC Procharger Setup 98-02 Fbody Ws6Dnero Parts Classifieds 8 Today 03:08 PM
Switching from D1SC to F1R, need pulley help! dirtyvette Forced Induction 19 05-04-2013 06:59 PM
Procharger pulley for 6-8 lbs of boost? sweet99ss Forced Induction 8 12-10-2012 05:24 AM
How much boost should I be making? P1SC-1, stock LS1 w/ blower cam. FlashLCD33 Forced Induction 11 09-01-2011 12:05 PM
Average Procharger boost with 4.5 pulley? RBCUDA Forced Induction 7 08-05-2007 07:00 PM



All times are GMT -5. The time now is 03:33 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details