horsepower upgrade question - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-01-2004, 02:47 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Apr 2004
Location: Nebraska
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Nebssei is on a distinguished road
Default horsepower upgrade question

The late model GTP is rated at 260 hp...what is the difference between that engine and my 240 hp in 2000 Bonneville?

Thinking of doing 180 themostat, homemade CAI, 3.5 or 3.4 pulley. What would be the hp after those mods? Also what if I added 1.8 or 1.9 rockers to that combo?

I am looking for mild upgrade, do not want to have to mess with engine computer... Will I get any codes with these changes?
Nebssei is offline   Reply With Quote
Old 05-01-2004, 02:50 PM   #2
Sol
Senior Member
True Car Nut
 
Join Date: Sep 2002
Posts: 8,909
Thanks: 0
Thanked 0 Times in 0 Posts
Sol is on a distinguished road
Default

The difference is that you have a Series II engine, and the new GTP has a Series III. It has an upgraded blower.

With those first mods, you will get around 30-35HP or so. With rockers, add about 20-25 more.


EDIT: And I'm being modest with those numbers.
Sol is offline   Reply With Quote
Old 05-01-2004, 03:08 PM   #3
Senior Member
True Car Nut
 
Join Date: Jun 2003
Location: Purgatory
Posts: 6,313
Thanks: 0
Thanked 0 Times in 0 Posts
PontiacDad is on a distinguished road
Default

The hp gains will need some exhaust work to complete. Headers, high flow cat/o2 spoof to flow the added air from the cai and smaller pulley.
You wont throw any codes with these upgrades, the only exception being the rear O2 sensor (cat) that can throw a ses light but does not effect performance. The o2 spoof takes care of the ses light and only costs $40.

By the time you do all these mods you will want to upgrade the pcm, thats where I'm at now. Removing the limiters and raising shift points is enough of an incentive for me but with the advanced timming and kr control this is like free horsepower
PontiacDad is offline   Reply With Quote
Old 05-02-2004, 04:18 PM   #4
Senior Member
True Car Nut
 
Join Date: Feb 2003
Location: Bloomington-Normal, IL 1997 SE
Posts: 3,734
Thanks: 0
Thanked 0 Times in 0 Posts
macho_mike21 is on a distinguished road
Default

the stock computer will only let you go so far until it starts to be more of a hinderance than a help.
macho_mike21 is offline   Reply With Quote
Old 05-02-2004, 07:01 PM   #5
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Rogue is offline   Reply With Quote
Old 05-02-2004, 08:33 PM   #6
Senior Member
Expert Gearhead
 
Join Date: Dec 2002
Location: Mississauga, Ontario
Posts: 20,892
Thanks: 0
Thanked 1 Time in 1 Post
Jim W is on a distinguished road
Default



The man has his own webpage at INTENSE....

Hands down...that is so damn cool
Jim W is offline   Reply With Quote
Old 05-02-2004, 09:26 PM   #7
Senior Member
Certified GM nut
 
Join Date: Jul 2003
Location: Chicagoland
Posts: 1,712
Thanks: 0
Thanked 0 Times in 0 Posts
TaylorD is on a distinguished road
Default

NOt a bad plan at all, That'* where I'm at.
3.4, CAI, 1.9 rockers 180 stat and a few others, The computer has never thrown a code. The car drives WAY different than stock, not sure on the #'* but it'* considerable more fun to drive.

But Pdad is right, Exhaust is next for me and can't wait for a PCM to make all the parts mingle together for few extra ponies, but to answer your question you will be fine, you'll be looking for a LSD though, car will light up them tires at scary speeds.
TaylorD is offline   Reply With Quote
Old 05-03-2004, 02:18 PM   #8
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Apr 2004
Location: Nebraska
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Nebssei is on a distinguished road
Default hp upgrade

Taylor D, I decided to start out with the 3.4 pullley.....Will my stock belt work or do I need a different belt? If so...what part number..

thanks.......let the mods begin
Nebssei is offline   Reply With Quote
Old 05-03-2004, 02:21 PM   #9
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

you need a smaller belt....

Gatorback GB6-715
Rogue is offline   Reply With Quote
Old 05-03-2004, 10:37 PM   #10
Senior Member
Posts like a 4 Banger
 
Join Date: Nov 2003
Location: Morris, Illinois
Posts: 100
Thanks: 0
Thanked 0 Times in 0 Posts
MarkFahey is on a distinguished road
Default

Quote:
Originally Posted by Rogue
you need a smaller belt....

Gatorback GB6-715
It'* probably best to change the belt but when I went to a 3.4 40,000 miles ago, I didn't change it and have never had any trouble.
MarkFahey is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
(1) Brake upgrade (2) Sway bar upgrade wrair 2000-2005 3 04-04-2012 01:12 PM
FE2 swaybars upgrade: springs upgrade optional or no? Bugsi Performance, Brainstorming & Tuning 7 11-20-2005 09:16 PM
Strongly considering an upgrade...Upgrade complete! randman1 1992-1999 21 06-28-2004 01:14 AM
The big Horsepower question!! DrJay Performance, Brainstorming & Tuning 17 01-21-2004 12:35 AM
Nice "little" upgrade (turbo upgrade that is) Burgundy_Boat Lounge 6 09-07-2003 04:36 AM


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 Off
Refbacks are Off



All times are GMT -4. The time now is 05:30 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.