Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 04-24-2010, 04:29 PM   #1
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 37
Posts: 5,616
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
What you're saying is theoretically all good and true, but in the real world both on and off track you have to deal with different speeds and loadings. You can't always come in and go out of a corner while redlining in a certain gear.

This is where the broad powerband comes into play. This way, when you can't come into a corner in an optimal gear and/or rpm, the broad torque curve will get you out faster than if you've sacrificed that for peak power.

That is the reason I'm sticking with a .63 2871R until I can upgrade to a twin-scroll setup.
__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Sponsored Links
Old 04-24-2010, 05:32 PM   #2
jspaeth
Nissanaholic!
 
jspaeth's Avatar
 
Join Date: Mar 2006
Location: Philadelphia suburbs
Age: 40
Posts: 2,347
Trader Rating: (7)
jspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfectionjspaeth is close to perfection
Feedback Score: 7 reviews
Quote:
Originally Posted by PoorMans180SX View Post
What you're saying is theoretically all good and true, but in the real world both on and off track you have to deal with different speeds and loadings. You can't always come in and go out of a corner while redlining in a certain gear.

This is where the broad powerband comes into play. This way, when you can't come into a corner in an optimal gear and/or rpm, the broad torque curve will get you out faster than if you've sacrificed that for peak power.

That is the reason I'm sticking with a .63 2871R until I can upgrade to a twin-scroll setup.
I agree with you on the whole practicality thing, but I really feel like in this guy's case (4x4le or whatever), he can drastically extend his powerband WITHOUT sacrificing very much at all down low, simply by adding cams and springs/retainers.

If he is so concerned with "midrange", he should NOT have the Greddy IM....just ask SteveShadows his opinion on that.

If you are going to go with the Greddy IM, which already slows your spoolup, you might as well add cams, which aren't really going to further hurt spoolup but WILL dramatically help topend and allow you to safely rev out much higher than OEM cams.
__________________

Daily driven
jspaeth is offline   Reply With Quote
Old 04-24-2010, 05:35 PM   #3
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 37
Posts: 5,616
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
Quote:
Originally Posted by jspaeth View Post
I agree with you on the whole practicality thing, but I really feel like in this guy's case (4x4le or whatever), he can drastically extend his powerband WITHOUT sacrificing very much at all down low, simply by adding cams and springs/retainers.

If he is so concerned with "midrange", he should NOT have the Greddy IM....just ask SteveShadows his opinion on that.

If you are going to go with the Greddy IM, which already slows your spoolup, you might as well add cams, which aren't really going to further hurt spoolup but WILL dramatically help topend and allow you to safely rev out much higher than OEM cams.
You make a good point.
__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Old 04-24-2010, 06:58 PM   #4
HemiCharger
Zilvia Member
 
HemiCharger's Avatar
 
Join Date: Jan 2008
Location: midwest
Age: 49
Posts: 216
Trader Rating: (1)
HemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymoreHemiCharger is not welcome here anymore
Feedback Score: 1 reviews
The point is that you have blown up motors and had to redo things to get to where you are. I elected to not go that route since I make enough power to kill Mustang GTs, Maros and Challengers. Where I live, a Mustang is like a Civic, everyone has one and loves to modify them. The new coyote 5.0 could be a different story. They are bringing the big power back to the Mustang.

Also you all have said that a board usable power band is better so you are in agreement. However, why not extrude hone the intake manifold like codyace and I have done to the exhaust manifold? The exhaust manifold came out supreme and will last a lot longer than the Tomei, I use to run. It would be interesting to see the gains. Cody was I thought suppose to have a dyno sheet comparing the two but I do not know if that ever got done?

I am older than most of the scene and drive a modified S14 -- also I do not subscribe to ImportTuner but the Nissan Sport Quarter Mag.
HemiCharger is offline   Reply With Quote
Old 04-24-2010, 07:13 PM   #5
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 37
Posts: 5,616
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
Quote:
Originally Posted by HemiCharger View Post
The point is that you have blown up motors and had to redo things to get to where you are.
Wrong again. JWT and Enthalpy tunes will not blow engines. This is not "guess-and-hope-your-engine-doesn't-blow". It's tuning, there is a right and safe way to go about things.

Quote:
Originally Posted by HemiCharger View Post
I elected to not go that route since I make enough power to kill Mustang GTs, Maros and Challengers. Where I live, a Mustang is like a Civic, everyone has one and loves to modify them. The new coyote 5.0 could be a different story. They are bringing the big power back to the Mustang.
No one cares.

Quote:
Originally Posted by HemiCharger View Post
Also you all have said that a board usable power band is better so you are in agreement. However, why not extrude hone the intake manifold like codyace and I have done to the exhaust manifold?
Why don't you try it and find out?

Quote:
Originally Posted by HemiCharger View Post
I am older than most of the scene and drive a modified S14 -- also I do not subscribe to ImportTuner but the Nissan Sport Quarter Mag.
Nissan Sport sucks.
__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Reply

Bookmarks

Tags
400 hp, enthalpy, gt2871r, gt2871r .64, jwt


Thread Tools
Display Modes

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

Forum Jump


All times are GMT -6. The time now is 01:20 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
vB.Sponsors
Copyright ? 1998 - 2022, Zilvia.net