Is closed deck better?
Since a closed deck engine has more support near the head where the high pressure of combustion is at it’s greatest, these engines are simply stronger where it counts. A closed deck engine is nice, but when modern materials and casting allow for cheaper open deck designs they’re few an far between.
What car has EJ207?
The Japanese WRX models use the EJ207 from 1999~2001, except the 5-door wagon which also uses the EJ205. After 2001, all WRXs used the EJ205, until 2006 when the USDM WRX model changed engines to the EJ255.
What Turbo does the EJ207 have?
Turbocharger: GD Impreza WRX STi For the GC Impreza WRX STi, the EJ207 engine had a single scroll turbocharger which provided naximum boost pressure of 848 mm Hg (1.13 bar, 16.4 psi) at 4000 rpm. It is understood that the GD Impreza WRX STi has an IHI VF35 RHF55 turbocharger.
What year STi has EJ207?
The Japanese WRX models use the EJ207 from 1999~2001, except the 5-door wagon which also uses the EJ205. After 2001, all WRXs used the EJ205, until 2006 when the USDM WRX model changed engines to the EJ255. The EJ205 has an 8:1-9:1 compression ratio.
Why are some engines open deck?
Open deck designs have the coolant channel cast into the top of the deck. This design improves cooling and reduces hot spots in the cylinder but provides much less strength and rigidity at the top of the cylinder.
Do you need to deck engine block?
A block should also be decked to ensure a good, flat surface so that you can achieve a good gasket seal. Finally, a block must often be decked to achieve the proper deck height. Manipulating the block’s deck height helps dial-in compression and also ensures the proper quench area.
Is EJ25 open deck?
Semi-Closed Deck These are found in most EJ20 and EJ25 Turbo vehicles. Semi-Closed deck blocks offer reasonable strength and an open coolant passage to the cylinder head for optimal cooling.
Which is better EJ207 or semi closed deck?
To be noted is that the latest EJ207 for Spec C models has a configuration of sleeve support that can be called better than semi-closed deck. Some versions have had forged pistons and some have had cast pistons. Some versions have had equal length headers, most of these with twinscroll. The differences will be reviewed below.
Is the JDM EJ207 available in the US?
Unfortunately, it was never made available for the US market. The latest EJ207 for Spec C models has a configuration of sleeve support that can be called better than semi-closed deck. Some versions have had forged pistons and some have had cast pistons. Some versions have had equal length headers, most of these with twinscroll.
Is the EJ205 open V5 or V7?
But EJ207 is open V5/6 and semi V7/8/9…so identical block numbers but different design. This^, ( also im pretty sure my 205 block is stamped “ej205”) edit scratch that! haha could have sworn it did somewhere though. More sharing options…
What kind of molybdenum is in JDM version 7?
JDM Version 7 STI EJ207, S20C – Forged Molybdenum Pistons. (Forged Moly) JDM Version 8/9 STI EJ207, T20C – Cast Hypereuthectic. (High Silicon Based Cast Alloy) Version 8/9 STI block T20C: Version 10 STI block W20C beside the Version 7/8/9 S20C/T20C: Phase 2 and Phase 3 Heads, can also be Identified by this same External Stamp Code: