Notices
Series I Aftermarket Performance Modifications Discussion of power adding modifications

Max NA HP/Torque

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 09-01-2011, 01:45 PM
  #1  
US Navy Rotary Enthusiast
Thread Starter
iTrader: (3)
 
Hesselrode's Avatar
 
Join Date: Aug 2007
Location: New Orleans, LA
Posts: 1,062
Likes: 0
Received 3 Likes on 3 Posts
Max NA HP/Torque

If u took an 8 and ported it and did everything like ecu, cobb ap, exhaust, intake, coils, etc, what kind of power would you get from it?
Old 09-01-2011, 01:51 PM
  #2  
Registered RX8 Nut
iTrader: (11)
 
Highway8's Avatar
 
Join Date: Jul 2007
Location: Fairfield, CA
Posts: 1,366
Likes: 0
Received 7 Likes on 7 Posts
Originally Posted by Hesselrode
If u took an 8 and ported it and did everything like ecu, cobb ap, exhaust, intake, coils, etc, what kind of power would you get from it?
Somewhere in the 220-230 HP and 180-190 TQ range at the rear wheels with a street port

Here is a tread that should address your question. https://www.rx8club.com/series-i-major-horsepower-upgrades-93/bdc-street-port-vs-stock-port-dyno-comparison-216762/

And another thread with a bridgeport which shoudl make a few more.

https://www.rx8club.com/showthread.p...ric+meyer+port
Old 09-01-2011, 02:26 PM
  #3  
Time for boost...
iTrader: (24)
 
RX8Soldier's Avatar
 
Join Date: Jun 2010
Location: Canada
Posts: 5,414
Likes: 0
Received 15 Likes on 14 Posts
depends on the quality of upgrades.
If you install ebay junk, then you probably won't get those numbers. Nor will it last long...
Old 09-01-2011, 04:13 PM
  #4  
US Navy Rotary Enthusiast
Thread Starter
iTrader: (3)
 
Hesselrode's Avatar
 
Join Date: Aug 2007
Location: New Orleans, LA
Posts: 1,062
Likes: 0
Received 3 Likes on 3 Posts
I meant with the best stuff you could buy.
Old 09-01-2011, 08:11 PM
  #5  
Gold Wheels FTW
iTrader: (1)
 
reddozen's Avatar
 
Join Date: Nov 2007
Posts: 1,116
Received 49 Likes on 35 Posts
Originally Posted by Hesselrode
I meant with the best stuff you could buy.
Expect to spend around $3000~$5000 for 230 HP.
For the same price you can build a FI setup for considerably more power.
Old 09-02-2011, 06:53 AM
  #6  
Registered
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 26,855
Likes: 0
Received 2,072 Likes on 1,689 Posts
Searching is free, but then so is reposting the same old thread one more time ...
Old 09-02-2011, 07:10 AM
  #7  
Registered
iTrader: (2)
 
RIWWP's Avatar
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 253 Likes on 110 Posts
https://www.rx8club.com/new-member-forum-197/new-potential-owners-start-here-202454/

Originally Posted by RIWWP
Power Modifications:
From the factory, the 8 is VERY well tuned (mechanically). There are only 2 things you can do for easy power:
- AccessPORT custom tune to remove some of the "safe" parts of the tune
- Removing the naturally restrictive catalytic converter.

Doing the rest of the common upgrades piston cars get (intake, exhaust, pulleys, etc...) nets you MAYBE 5hp. MAYBE. Depending on the brand, alot of them are inferior to the OEM stock system, and plenty cause you to lose power.

If you want power, you have to go forced induction, turbo or supercharger. And you need a starting amount of about $8,000 to $10,000 for a complete set up. If you find what you think is a "deal", please don't get fooled. If you spent $1,500 on your turbo system, you will still spend $8,000 to $10,000 in modifications, errors, swapping parts, getting stuff to finally work right, and probably an engine replacement along the way. If you dont have an AccessPORT, you have very little chance in making it work.

If you don't go that route, then the most you can expect is about 200 whp without a custom engine rebuild, which can run you $5,000+ once you factor in the labor of pulling and reinstalling the engine and the shipping. The advancements in porting work have been slow coming, but they are still moving the needle upwards.
BDC has taken the new top N/A dyno (non-race team funded) posted on 5/16/2011 here: https://www.rx8club.com/showthread.php?t=216762 223whp:

Please note that "heavy" has not been defined as of this edit. The gains are from more than 1 source. Likely full 3 inch headers to tips on the exhaust, entirely unknown what the intake is. The porting work above was mostly on the intake ports rather than the exhaust ports. There was also likely significant improvement in the seal tolerances over factory specs.

Eric Meyer posted his 233hp dyno sheet here: https://www.rx8club.com/series-i-major-horsepower-upgrades-93/233-rwhp-dyno-sheet-218322/
But keep in mind that it's likely his team invested $100,000+ (just a guess) into the R+D of the engine and drivetrain to get it there (including special treatments of the transmission and diff to reduce drivetrain loss)
Note, Eric Meyer reported being able to get 2-4 more PEAK hp than he posted, however he loses power nearly everywhere else in the curve, making the car overall slower.

A single power number is a terrible thing to evaluate.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
JimmyBlack
Series I Major Horsepower Upgrades
273
02-10-2020 10:23 PM
projectr13b
RX-8 Racing
20
05-14-2016 06:25 PM
Steve Dallas
RX-8 Racing
10
10-07-2015 10:30 AM
Learners_Permit
Series I Interior, Audio, and Electronics
8
09-27-2015 07:38 PM
mattymack
New Member Forum
2
09-06-2015 10:33 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Max NA HP/Torque



All times are GMT -5. The time now is 11:53 PM.