|
02-10-2010, 07:58 AM | #19 | |
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 576
|
Quote:
|
|
02-10-2010, 11:47 AM | #20 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
|
better springs = stronger or "high pressure" springs
I don't have a recommendation, I have stock springs and I'm happy with my results so far. I see no need right now for higher revs - the car doesn't make more power up there.
__________________
Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
02-10-2010, 05:27 PM | #21 |
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 576
|
In the microimage forums you mentioned in your thread (on last page 7) that art used stronger springs. Are you sure they are stock?
|
02-10-2010, 05:52 PM | #22 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
|
yep, they are stock. I was wrong. :(
__________________
Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
02-10-2010, 07:02 PM | #23 |
daily driver
|
even richard holdener's setup peaked around 6000rpm
__________________
|
02-10-2010, 09:12 PM | #24 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
|
I can almost guarantee that you're starting to float the valves past 6000 RPM. With 20 psi of boost pushing them open, plus the high revs and the fact that they are pretty soft to start with.
|
02-11-2010, 05:41 AM | #25 |
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 576
|
I can say that many owners who built a 1NZFE focused more on the bottom end (pistons and rods) which it's the right thing... but when planning beyond certain power and boost you can't leave a stock head pure and plain!
What about a Top End build? Is there a secret for the ultimate powerband of a 1NZFE? |
02-11-2010, 01:47 PM | #26 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
|
it's no secret. port and polish, then work on valves, then work on cams. Cams are tricky with VVT-I though, in my experience.
__________________
Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
02-11-2010, 07:21 PM | #27 | |
Don't drive it, RALLY it!
Drives: 1999 echo PRC rally car Join Date: Oct 2008
Location: Joyner, Brisbane
Posts: 321
|
Quote:
Ideally, you choose your camshaft based on the intended purpose of the vehicle and where abouts you want the power band to be in the rev range, then select valve springs (and sometimes valves) to suit, and then size your turbo, intake, exhaust and intercooling system accordingly. In theory, the design of the 1NZFE does not suit really high revs due to the bore to stroke ratio. If using stock cams, then the factory redline (or slightly higher if it helps with your gear change points) will suffice. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
1NZFE K1 by Carrillo Rod interest list | xBoosted | Forced Induction Forum | 20 | 01-20-2009 02:51 PM |
EVERYONE PLEASE STAY SAFE! | Shroomster | Off-topic / Other Cars / Everything else Discussions | 5 | 01-01-2009 05:47 AM |
CEL blinking during rev limit hit. | ddongbap | General Yaris / Vitz Discussion | 2 | 10-01-2007 02:10 AM |
Hyper Rev: Vol# 108 Vitz (No. 3) **IN STOCK & READY TO SHIP** | KamiSpeed | Sponsors Classifieds Area | 1 | 03-03-2007 01:50 PM |