|
|
|
|
Thread Tools | Display Modes |
07-30-2009, 03:58 AM | #1 |
Scooby Newbie
Member#: 120579
Join Date: Jul 2006
Chapter/Region:
International
Vehicle:1995 STi V2 Wagon Silver |
Port Heads or Not - Built Motor
Hi People,
Need some expert proven advise on the build of my motor. This is what is being built - EJ25 703 Block Nitride 2.5L Crank ACL Bearings Manley H Rods 100mm Manley Pistons GT3076r Turbo rotated external wastegate 850cc Deutchwerks Injectors Link ECU Aquamist 1s - 50% Methanol Injection Custom FMIC Now the question I have is with my STi V4 heads... should I port them or not? Who has seen proven power from porting? Many thanks, San-
* Registered users of the site do not see these ads.
|
07-30-2009, 05:48 AM | #2 |
Scooby Specialist
Member#: 120339
Join Date: Jul 2006
Chapter/Region:
RMIC
Location: Utah
Vehicle:02 WRX Alliance Motor Sports |
Power is in the head work.
|
07-30-2009, 07:23 AM | #3 |
Scooby Newbie
Member#: 120579
Join Date: Jul 2006
Chapter/Region:
International
Vehicle:1995 STi V2 Wagon Silver |
Ok.. So where can you show me improved flow rates..exhaust or intake or both, how much should you take off? What about matching the head cylinder section with the actual block cylinders and round that?.
Where spring valves lifter combos... A little bit more info please chaps? |
07-30-2009, 10:28 AM | #4 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
not much work needed to be done with those Ver. IV heads.
Blend the valve seats with the port runners on all the ports. do a 3angle valve job and you're all good to go. |
07-30-2009, 10:50 AM | #5 |
Scooby Newbie
Member#: 120579
Join Date: Jul 2006
Chapter/Region:
International
Vehicle:1995 STi V2 Wagon Silver |
thanks for the reply... how are the ver4 head diff?
|
07-31-2009, 01:31 AM | #6 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
Here's an EJ20K
http://psituned.com/gallery/photos/5.jpg they are plenty big. USDM heads don't compare especially 04-06 EJ257 heads. |
07-31-2009, 05:00 AM | #7 |
Scooby Newbie
Member#: 120579
Join Date: Jul 2006
Chapter/Region:
International
Vehicle:1995 STi V2 Wagon Silver |
Thanks for the info... will google and ask more questions if stuck
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Wtb: Wrx engine or Wtt: Built motor for your stocker, plus cash | BoostedSti | Private 'Wanted' Classifieds | 0 | 07-12-2008 10:09 PM |
2.5 Block w/ V8 heads or JDM FXT Motor? | ejh25 | Built Motor Discussion | 24 | 01-25-2007 10:22 AM |
Port TGVs or not? | 2OHOH2WRX | Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) | 21 | 03-15-2005 06:08 AM |
can nitrous deformate the heads or not? | ILwrx | Water/Methanol Injection, Nitrous & Intercooler Cooling | 10 | 08-22-2004 10:18 AM |
Dual port head or Single port head ? | G.Subramaniam | Normally Aspirated Powertrain | 5 | 06-25-2004 12:09 PM |