300RWHP- Mission Accomplished, Much Learned
05-27-2009, 09:37 PM
#51
1st Gear Member
Join Date: Feb 2009
Location: Illinois
Posts: 72
great thread, I'm waiting to see what my bonus looks like to see if I go with gears next or with Kooks LT's. I know that the gears are a lot less money but if I've got the money I may take advantage of it and get the LT's installed. I would like to keep mine NA so my wish list is short - CAI (got it), tune, 4.10 gears, Kooks LT's & X pipe with high flow cats, and either the Thumper Cams or the FRPP cams.
05-27-2009, 10:49 PM
#52
1st Gear Member
Thread Starter
Join Date: Apr 2009
Location: MD
Posts: 66
Something to keep in mind is that if you put the 3:73's in at the same time as the headers and pullies this would have skewed your results some. If I understand it correctly anytime you go to a higher numerical gear the output on a dyno will actually read less than the same setup with a lower numerical gear.
You're right, the shop owner said that usually the jump from 3.31 to 3.73 will result in a lower dyno reading by around 4-5hp across the board.
Steve
06-01-2009, 08:31 AM
#58
5th Gear Member
Join Date: Mar 2006
Location: ATL
Posts: 2,955
Ok, 60-65mph makes complete sense. I notice that once I dip into the 70's, my mpg starts to drop hard. 75 to 80 is lucky to see 19mpg by the end of a tank and over 80mph is down around 17mpg. This includes very little city driving, roughly 10%.
06-03-2009, 02:16 PM
#60
Mish-ogynist
Join Date: Nov 2007
Location: Helena, MT
Posts: 3,780
I'm sure he would say no. he got shorty headers(5rwhp), UDP's(4rwhp), and a catted Bassani x-pipe(4rwhp) peak output only went up 13rwhp/6rwtq... if he did do gears at the same time he might have gotten a little more from each mod..
It is rare for people to get much over 5 rwhp out of shorty headers, the stock manifolds flow really well as it is.. usually you'll see better gains from them after you've done atleast cams if not heads or F/I.. only people ive seen with 15rwhp gains were in the 400-500rwhp range.
Your delete plates might get you 5rwhp if you are lucky.
Get the Long Tubes! woot! Macs are fairly cheap and work well.. I still want Kooks
It is rare for people to get much over 5 rwhp out of shorty headers, the stock manifolds flow really well as it is.. usually you'll see better gains from them after you've done atleast cams if not heads or F/I.. only people ive seen with 15rwhp gains were in the 400-500rwhp range.
Your delete plates might get you 5rwhp if you are lucky.
Get the Long Tubes! woot! Macs are fairly cheap and work well.. I still want Kooks
Last edited by Mishri; 06-03-2009 at 02:19 PM.