Boost vs timing : Forced Induction

View unanswered posts | View active topics

Portal » Board index » Mechanical and Maintenance (no chat or performance) » Forced Induction

All times are UTC - 5 hours [ DST ]

Boost vs timing

Page 1 of 1

[ 9 posts ]

Print view

Previous topic | Next topic

Author

Message

olblueeyesbonne

Post subject: Boost vs timing

Posted: Fri Sep 19, 2008 12:54 am

Retired Moderator

Joined: Wed May 21, 2008 9:44 pm
Posts: 6146
Location: Sauk Centre, MN
Year and Trim: 99 SSEi
01 SLE
02 GTP40th
02 SSEi
06 GP GT

Something I've been wondering about for a while is, should I go with more timing as modding permits or leave the timing where it is and go with more boost.
Well, I'm to that point now and want input from the pro's.
I'd like to drop to a 3.4" on the stock GEN III with the rockers and then with future modding just add timing until that becomes inefficient, then start adding the boost.

Opinions?

_________________
DHP Powrtuner & Tech 2
1998 GTP Coupe
1999 SSEi 70k miles
2000 Silverado 2500 Ext Cab 4x4/6.0L/4L80E
2000 Trans Am WS6 LQ3 (LQ4 w/LS3 top end) 4L60E
2001 SLE
2002 Monte Carlo SS Top-swapped FSIC Gen V TOG's, Mezeire.....
2002 GTP 40th Anniv Ed Coupe
2004 GTP Comp G 'Bottom-swapped'

Top

willwren

Post subject: Re: Boost vs timing

Posted: Fri Sep 19, 2008 11:51 am

Retired Admin

Joined: Sun May 18, 2008 11:07 pm
Posts: 65489
Location: Oregon WCBF'04, '05, '06, '07, '08, '09, '10, '11 Survivor
Year and Trim: .
93 SSEi
95 SLE (SC)
97 Buick LeSabre

In general, you are better off getting as much timing as you can first, and that should come before boost.

Most people go for boost first simply because they don't have the ability to tune, but in the long run, most here would probably benefit from more timing and a larger pulley.

The most I can adjust on the fly is 6 degrees on the Zilla, so I tune that in first, then see how far I can drop in pulley size.

_________________

Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

Top

agrazela

Post subject: Re: Boost vs timing

Posted: Fri Sep 19, 2008 2:04 pm

Retired Gearhead

Joined: Thu May 22, 2008 11:28 am
Posts: 1808
Location: San Diego, CA
Year and Trim: 04 Lesabre, Stock
98 Lesabre, Retired

The mantra I hear, at least re: boosted Series 2, is: get to 18-20 degrees advance WOT KR-free--only then start thinking about adding more boost.

Supposedly, any more than 20 degrees advance is unnecessary, possibly even counter-productive.

_________________
2004 Buick Lesabre Limited, Gran Touring
Bone Stock

1998 Buick Lesabre Limited, Gran Touring
Retired

Top

bonnevillain

Post subject: Re: Boost vs timing

Posted: Fri Sep 19, 2008 4:10 pm

Retired Site Developer

Joined: Wed May 21, 2008 11:07 pm
Posts: 3046
Location: Minnesota
Year and Trim: 2002 SLE

does that number apply to N/A cars too? i get about 18 @ WOT

Top

willwren

Post subject: Re: Boost vs timing

Posted: Fri Sep 19, 2008 4:12 pm

Retired Admin

Joined: Sun May 18, 2008 11:07 pm
Posts: 65489
Location: Oregon WCBF'04, '05, '06, '07, '08, '09, '10, '11 Survivor
Year and Trim: .
93 SSEi
95 SLE (SC)
97 Buick LeSabre

Not by default. You run different fuel, have higher natural compression, and can't pulley down. Alot of differences that would probably point to a different ideal number for you.

_________________

Top

Dirthead Racing

Post subject: Re: Boost vs timing

Posted: Fri Sep 19, 2008 4:23 pm

SSE Member

Joined: Fri Jun 13, 2008 4:45 pm
Posts: 107
Year and Trim: 97 ssei
12.67@103

agrazela wrote:

Supposedly, any more than 20 degrees advance is unnecessary, possibly even counter-productive.

At 24 deg you get to change head gaskets......FWIW

Top

BillBoost37

Post subject: Re: Boost vs timing

Posted: Wed Sep 24, 2008 10:06 am

Certified Bonneville Nut

Joined: Thu Jun 05, 2008 2:29 pm
Posts: 29203
Year and Trim: 00 Regal

bonnevillain wrote:

does that number apply to N/A cars too? i get about 18 @ WOT

No, the NA tables are much higher stock due to the lower cylinder air mass.

_________________
97 Ei
97 GS
98 GS

Top

bonnevillain

Post subject: Re: Boost vs timing

Posted: Wed Sep 24, 2008 10:17 am

Retired Site Developer

Joined: Wed May 21, 2008 11:07 pm
Posts: 3046
Location: Minnesota
Year and Trim: 2002 SLE

so the numbers should be higher.

Top

BillBoost37

Post subject: Re: Boost vs timing

Posted: Wed Sep 24, 2008 10:22 am

Certified Bonneville Nut

Joined: Thu Jun 05, 2008 2:29 pm
Posts: 29203
Year and Trim: 00 Regal

In an NA, yes.

_________________
97 Ei
97 GS
98 GS

Top

Page 1 of 1

[ 9 posts ]

Portal » Board index » Mechanical and Maintenance (no chat or performance) » Forced Induction

All times are UTC - 5 hours [ DST ]

Topics		Author	Replies	Views	Last post
Related topics
	Too much boost?	BonnieBoy08	12	2831	Fri Jun 07, 2013 9:04 am BonnieBoy08
	No boost	dave1003	7	4062	Tue Apr 19, 2011 1:17 pm myfirstbonnie
	Low Boost	danseaview	6	2830	Thu Oct 25, 2012 9:15 pm danseaview
	low boost	irish91983	12	3369	Wed Aug 08, 2012 1:33 pm 01bonneSC
	Boost?	irish91983	12	2630	Thu Jun 17, 2010 1:11 pm irish91983

Who is online

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to: