EQ Tuning - Engine Build Packages!
Thread Starter
iClub Silver Vendor
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From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
This is a really nice 04 STI we've been working on. The owner completed the break-in and brought it in for the final tune. This car has:
EQ Stage 1 Shortblock
Tomei ARMS 20G Turbo
Tomei Headers
Tomei Cams
Catted TBE
APS 65mm CAI, Inlet
PE850cc Injectors
Walbro
MBC
EQ Custom Tune on 91 Octane
This car came out really nice. The turbo spools up very quickly and carries power well to redline. The transient response while driving feels very much like the stock turbo
.
Thanks
-- Ed
EQ Stage 1 Shortblock
Tomei ARMS 20G Turbo
Tomei Headers
Tomei Cams
Catted TBE
APS 65mm CAI, Inlet
PE850cc Injectors
Walbro
MBC
EQ Custom Tune on 91 Octane
This car came out really nice. The turbo spools up very quickly and carries power well to redline. The transient response while driving feels very much like the stock turbo
.Thanks
-- Ed
Have you guys done anything with oversized valves yet? A couple posts from Element Tuning seem kinda interesting:
http://forums.nasioc.com/forums/show...05&postcount=6
http://forums.nasioc.com/forums/show...0&postcount=11
http://forums.nasioc.com/forums/show...05&postcount=6
http://forums.nasioc.com/forums/show...0&postcount=11
Thread Starter
iClub Silver Vendor
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Posts: 8,228
From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
We have a couple builds in the shop right now with oversized valves. They're still a bit away from being completed, but when they are, I'll post some results.
-- Ed
-- Ed
Thread Starter
iClub Silver Vendor
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From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
Here's a new tune on one of the original builds. The customer changed some parts so we went to touch up the tune... this is on 91 Octane:
-- Ed
-- Ed
Thread Starter
iClub Silver Vendor
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From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
Finished up another WRX hybrid build with an EQ Stage 1 shortblock and our new CNC machined Hybrid Heads!
Now to finish up an 07 WRX swap into another bugeye
-- Ed
Now to finish up an 07 WRX swap into another bugeye
-- Ed
Thread Starter
iClub Silver Vendor
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From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
New CNC Service for Hybrid Builds!
We have an exciting new option for the 2.0/2.5 hybrid folks! As most people know, when you run a 2.5l shortblock with 2.0l heads, the compression ratio is too high to safely run on pump gas. The common approach to resolve this is to use a thicker head gasket to try to bring the compression ratio down. While this can bring the overall compression ratio down, it is by no means ideal. The resulting combustion chamber shape remains inefficient since you're leaving the 2.0l chamber in the heads untouched. You are in essence shrinking the quench area and introducing several sharp edges to the combustion chamber that can build up heat and cause knock. This makes the engine less efficient than a full EJ257 with EJ257 heads.
Instead of using a thicker head gasket, we decided to try something a bit different. We worked closely with our machine shop to actually map out the combustion chamber of the EJ257 STI head and create a CNC program to replicate the exact same chamber every time. Using this program, we then set up the 2.0l head castings in the CNC and machine out an exact copy of the 2.5l combustion chamber into each 2.0l head casting. We are then able to use a quality OEM head gasket and maintain the exact compression ratio of a complete STI engine. This greatly improves the quench area and overall efficiency of the engine because you now have the exact same combustion chamber as a full EJ257.
We have done several hybrid builds with this approach now and have seen great results not only in overall power output, but especially in terms of crisp, smooth off-boost drivability and torque. We've also seen a significant increase in fuel economy as compared to a standard hybrid build. From a tuning standpoint, the difference is so significant, that we had to spend quite a bit of time building new base maps for these builds. Under low load conditions, these setups can run as much as 15-20 degrees more timing advance than a hybrid build with a thicker head gasket. This was a great thing to see as we end up with a timing curve much more similar to an STI rather than a WRX.
This service is available for any EJ205 heads.
Thanks
-- Ed
We have an exciting new option for the 2.0/2.5 hybrid folks! As most people know, when you run a 2.5l shortblock with 2.0l heads, the compression ratio is too high to safely run on pump gas. The common approach to resolve this is to use a thicker head gasket to try to bring the compression ratio down. While this can bring the overall compression ratio down, it is by no means ideal. The resulting combustion chamber shape remains inefficient since you're leaving the 2.0l chamber in the heads untouched. You are in essence shrinking the quench area and introducing several sharp edges to the combustion chamber that can build up heat and cause knock. This makes the engine less efficient than a full EJ257 with EJ257 heads.
Instead of using a thicker head gasket, we decided to try something a bit different. We worked closely with our machine shop to actually map out the combustion chamber of the EJ257 STI head and create a CNC program to replicate the exact same chamber every time. Using this program, we then set up the 2.0l head castings in the CNC and machine out an exact copy of the 2.5l combustion chamber into each 2.0l head casting. We are then able to use a quality OEM head gasket and maintain the exact compression ratio of a complete STI engine. This greatly improves the quench area and overall efficiency of the engine because you now have the exact same combustion chamber as a full EJ257.
We have done several hybrid builds with this approach now and have seen great results not only in overall power output, but especially in terms of crisp, smooth off-boost drivability and torque. We've also seen a significant increase in fuel economy as compared to a standard hybrid build. From a tuning standpoint, the difference is so significant, that we had to spend quite a bit of time building new base maps for these builds. Under low load conditions, these setups can run as much as 15-20 degrees more timing advance than a hybrid build with a thicker head gasket. This was a great thing to see as we end up with a timing curve much more similar to an STI rather than a WRX.
This service is available for any EJ205 heads.
Thanks
-- Ed