Need some help for Next MOD? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 06-14-2004, 08:53 AM   #21
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

Quote:
Originally Posted by blackssei
High End power as in High End RPM'* ?? or Higher speeds
Well both, but the rockers give more power in the higher RPMs.

Here'* Todd'* dyno for just adding rockers look at 5400 rpms and up. big difference.
http://www.intense-racing.com/8ball.html

Get the rockers, recommended though to get Oil-restricted pushrods and 105 springs so there'* no valve float in the higher RPM'*.
TaylorD is offline   Reply With Quote
Old 06-14-2004, 09:58 AM   #22
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

Both, you will rev higher faster, thus getting you to higher mph faster.
Rogue is offline   Reply With Quote
Old 06-15-2004, 04:04 PM   #23
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2004
Posts: 75
Thanks: 0
Thanked 0 Times in 0 Posts
blackssei is on a distinguished road
Default

how much boost did you lose when you added the Rockers?
blackssei is offline   Reply With Quote
Old 06-16-2004, 09:11 AM   #24
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

Just by looking off the stock gauge I'm at 8.5-9.5 used to just peg 10 before off 3.4
My TOG'* are going in in 8 days and a 3.2 will be coming with it. Should be back up to 10-11ish hopefully with no KR.
TaylorD is offline   Reply With Quote
Old 06-16-2004, 11:56 AM   #25
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2004
Posts: 75
Thanks: 0
Thanked 0 Times in 0 Posts
blackssei is on a distinguished road
Default

I am wondering if the boost loss ( 2 lbs ) and the Rockers HP gain will cancel each other out?
blackssei is offline   Reply With Quote
Old 06-16-2004, 01:00 PM   #26
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Don't be concerned with indicated boost pressure. The flow is still the same. That'* really what'* important. You won't LOSE power at all.
willwren is offline   Reply With Quote
Old 06-16-2004, 01:59 PM   #27
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2004
Posts: 75
Thanks: 0
Thanked 0 Times in 0 Posts
blackssei is on a distinguished road
Default

I was not concerned with losing POWER AT ALL. I know that I will lose boost ( power ) when adding the rockers...and that the Rockers will give me 25+ HP gain. I am wondering if the Boost Loss from adding the Rockers and the Rockers HP gain will cancel each other out. I hope that I am making sense here....
blackssei is offline   Reply With Quote
Old 06-16-2004, 03:28 PM   #28
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Quote:
Originally Posted by blackssei
I was not concerned with losing POWER AT ALL. I know that I will lose boost ( power ) when adding the rockers...and that the Rockers will give me 25+ HP gain. I am wondering if the Boost Loss from adding the Rockers and the Rockers HP gain will cancel each other out. I hope that I am making sense here....
The key issue here is that you'll lose INDICATED boost because of the lower backpressure, and ease of flow. The volume of air through the engine remains unchanged. Think of it as poking a little hole in an airline right before the pressure gauge.

You're thinking (if I understand correctly) that you'll gain from rockers, and lose a little from boost? That'* not the case. You'll gain from rockers and lose indicated boost, but still have the same flow.
willwren is offline   Reply With Quote
Old 06-16-2004, 03:58 PM   #29
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2004
Posts: 75
Thanks: 0
Thanked 0 Times in 0 Posts
blackssei is on a distinguished road
Default

all I know is when I add a 3.4 from the stock 3.8 I get about 25hp gain...boost rises about 3psi....and if Rockers decrease the boost PSI...Logic would assume that the HP is lost as well.
blackssei is offline   Reply With Quote
Old 06-17-2004, 10:05 AM   #30
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

Quote:
Originally Posted by blackssei
all I know is when I add a 3.4 from the stock 3.8 I get about 25hp gain...boost rises about 3psi....and if Rockers decrease the boost PSI...Logic would assume that the HP is lost as well.
I understand your thinking, but you gained that extra boost buy turning the superchager faster and that added boost, now the rockers help the engine flow better so there'* less back pressure, meaning less boost, but the supercharger is still turning the same amount as before so flow is the same, so this loss of boost is GAINING POWER by effiency. Now you can add a smaller pulley to bring that boost back up and gain even more power, assuming it'* not making more KR.

Adding headers will also lower boost because of increased flow, than smaller pulley to bring boost back up again. Me I have 3.4 now with rockers, headers going on next weekend, will see how much more PSI is lost. Take it to my buddy with Atap, go for a run and than slap on a 3.2 and atap again, I'm confident all should be good.
TaylorD is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Help with next mod... ddalder General GM Chat 4 09-19-2007 01:38 PM
just starting need some ideas on next mod for 97 se 1001miles Performance, Brainstorming & Tuning 15 05-11-2006 01:58 PM
Next Mod.... MOS95B Lounge 1 03-21-2004 04:16 AM
Next under hood mod. SSEi Performance, Brainstorming & Tuning 7 02-06-2004 12:46 PM


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 05:28 AM.


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.