DYNO #'s IMPRESSED!!!!
Multi-Tasking Moderator!
Joined: Nov 2006
Posts: 15,618
From: Detroit Rock City!
Yea, my thing about the headers is 1. they're illegal in NJ regardless of emmsions and how much hp could I really expect to gain on top of the O/R H. I know it's 15hp on average, but that's not on top of the O/R pipe.
BTW everyone overlooked my question lol, what do you guys think of the AFR? too lean or what?
Thanks!
BTW everyone overlooked my question lol, what do you guys think of the AFR? too lean or what?
Thanks!
Yes, too lean. 13.5 at WOT... holy moly too lean. That's probably one of the reasons you got those numbers. That leaner a/f will give a better dyno number, however will be more likely to ping under heavy load on the road.
For N/A cars I like to have WOT at 12.6/1 Supercharged at 11.8/1.
Were any of those numbers stock?
Hi-Jack: Does anyone have stock vs tuned dyno graphs?
For N/A cars I like to have WOT at 12.6/1 Supercharged at 11.8/1.
Were any of those numbers stock?
Hi-Jack: Does anyone have stock vs tuned dyno graphs?
I would have the tune fine tuned for more safety IMO.....
Last edited by mygt500; Jan 24, 2009 at 05:32 AM.
Thread Starter
4th Gear Member
Joined: Feb 2008
Posts: 1,496
From: NJ
Damn, I didn't even know anyone else commented since December. I emailed Brenspeed about this and this was their reply
Scott, the A/F on your naturally aspirated combo looks absolutely perfect
tome. The tailpipe sniffer shows just about 1-1.5 point lean by nature. That
would put you at approx 13.2-13.3. I would not make a single change. That
a/f is exactly what we would shoot for. I mean exactly what we would target.
The A/F will not change in winter, or summer climate has little to no effect
on A/F.
Dave Bachota
What do you guys think? The car seems to run well. I have no pinging at all and throw no codes. If the car was too lean wouldn't it ping or maybe throw a code?
Sorry to re-open the thread but I'm interested...Thanks!
Scott, the A/F on your naturally aspirated combo looks absolutely perfect
tome. The tailpipe sniffer shows just about 1-1.5 point lean by nature. That
would put you at approx 13.2-13.3. I would not make a single change. That
a/f is exactly what we would shoot for. I mean exactly what we would target.
The A/F will not change in winter, or summer climate has little to no effect
on A/F.
Dave Bachota
What do you guys think? The car seems to run well. I have no pinging at all and throw no codes. If the car was too lean wouldn't it ping or maybe throw a code?
Sorry to re-open the thread but I'm interested...Thanks!
Mish-ogynist
Joined: Nov 2007
Posts: 3,784
From: Helena, MT
You could try datalogging with your sct if you have a laptop.. I've been meaning to give it a try myself sometime. If they say it's good I'd trust them but if you want to be sure your safe I think the datalog would let you know if you had any knock correction or anything else going on. +1 on nice numbers.. I probably dont have that much (ofcourse I have auto drivetrain loss)
2nd Gear Member
Joined: Jan 2007
Posts: 350
From:
Thread Starter
4th Gear Member
Joined: Feb 2008
Posts: 1,496
From: NJ
Im actually going to post a thread on my track #s. I just went on wed for the second time but only got 1 run. THis would be my fourth run ever on a drag strip--not so good.
On street tires which spun badly gave me my only run of 13.5@104.5 I had a 2.0x '60
I know what you guys are thinking too.....too low of a trap for 311hp. I'm no drag racer, I need some practice and some real tires and then I'll have some REAL #s. Look out for an unpcoming thread where I'll post all the info on all my 4 runs. Then you guys can give me some pointers!
On street tires which spun badly gave me my only run of 13.5@104.5 I had a 2.0x '60
I know what you guys are thinking too.....too low of a trap for 311hp. I'm no drag racer, I need some practice and some real tires and then I'll have some REAL #s. Look out for an unpcoming thread where I'll post all the info on all my 4 runs. Then you guys can give me some pointers!
Thread Starter
4th Gear Member
Joined: Feb 2008
Posts: 1,496
From: NJ
You could try datalogging with your sct if you have a laptop.. I've been meaning to give it a try myself sometime. If they say it's good I'd trust them but if you want to be sure your safe I think the datalog would let you know if you had any knock correction or anything else going on. +1 on nice numbers.. I probably dont have that much (ofcourse I have auto drivetrain loss)
THanks
Thread
Thread Starter
Forum
Replies
Last Post
