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Old 10-20-2004, 02:22 AM   #1
Rob K
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Default dcoty up and running again

After 3 months down time since my brother spun another rod bearing on his built 2.5 block the car is up and running. In a 8 hour marathon, I swapped the crazy heads from his built motor onto a totally stock block and installed it in his car. We got a used stock 2000rs motor for 750$ cad including a oversized throttle body and a unexpected surprise a BRAND NEW exedy clutch. Engine is perfect, consistent compression and brand new cross hatching marks in the cylinders. Put a few 100kms on the car and it runs well, idle is insane, without an interior the car is so loud I'm going to start wearing a helmet on the street so I don't go deaf and I'm used to really loud cars. Now that its up and running going to try to get some new dyno times and 1/4 mile times in the next month. Hit up some ice racing and rally events once the snow falls, and I finally can get the nitrous express direct port 100shot installed and finish the intake manifold. Hopefully the destroyed block will be repaired under the good conscience of the shop that built it as it failed with 400km on it during the break in period, otherwise I doubt Dan will spend more money on a N/A block. Its gonna be stock block and N20 or maybe a turbo but there comes to a point when there are diminishing returns and the current path stops making sense.
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Last edited by Rob K; 10-20-2004 at 02:33 AM.
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Old 10-20-2004, 03:14 AM   #2
impr25rs
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Its good to hear that the progress is made. What luck on the motor and clutch Hopefully things will get fixed at the shop so he can get back to the real NA speed.
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Old 10-20-2004, 04:20 AM   #3
RS_to_WRX_swap
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dont give up!
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Old 10-20-2004, 09:59 AM   #4
Warp3
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Yeah, don't give up...I wanna see some RSs out there revving to 8k consistently and preferably without dry sump oil systems necessary to do it. I completely halted my plans for an 8000rpm EJ25 after hearing of his apparent oiling issues after going above 7k.

Good luck, dcoty!

Shane
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Old 10-20-2004, 10:05 AM   #5
Soon2Bgreat
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Direct port 100shot...nice. Good luck with everything.
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Old 10-20-2004, 06:06 PM   #6
Matt Monson
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Great News! I had been wondering of late how Dan's car was doing. I didn't want myself and Section8 to become the last of the NA lunatics! And you deserved a free clutch after all those problems...

We'll have to compare notes in the coming months. I am picking up a fubar'd EJ257 block, including the factory oil cooler and putting in high CR pistons. I am a firm believer that with the EJ257 as an option, no-one will need to pay big $$$ for an NA bottom end anymore. We'll see once I have it assembled...
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Old 10-20-2004, 06:11 PM   #7
JewPac42
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Excellent, I hope everything works out for him. I wanna see that block get rebuilt.
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Old 10-20-2004, 11:51 PM   #8
Storm
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That's a great idea! It's only a matter of time before the wounded blocks become readily available.
Quote:
Originally Posted by Matt Monson
I am picking up a fubar'd EJ257 block, including the factory oil cooler and putting in high CR pistons. I am a firm believer that with the EJ257 as an option, no-one will need to pay big $$$ for an NA bottom end anymore. We'll see once I have it assembled...
Jay Storm
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Old 10-21-2004, 10:48 AM   #9
jamesfacts
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Congrats! I'm hoping you stay NA too... keep us posted!
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Old 10-21-2004, 04:43 PM   #10
Matt Monson
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Quote:
Originally Posted by Storm
That's a great idea! It's only a matter of time before the wounded blocks become readily available.

Jay Storm
Yep, mine has a bad #4 piston from detonation. Otherwise it should be fine for a rebuild. I just hope I can come up with the rebuild fundage quickly enough to have the world's first RSTi-NA...
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Old 10-21-2004, 05:50 PM   #11
Kevin Thomas
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Quote:
Originally Posted by Matt Monson
the world's first RSTi-NA...
Hey Matt,

I'm a fool! What exactly is this?


And congrats to Dcoty for getting the monster back up and running. Can't wait for 1/4 mile times. Dyno results would be nice if there is a before modifications dyno plot to show.
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Old 10-21-2004, 11:32 PM   #12
Storm
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I think I saw that block FS somewhere not too long ago for a good price!
Quote:
Originally Posted by Matt Monson
Yep, mine has a bad #4 piston from detonation. Otherwise it should be fine for a rebuild. I just hope I can come up with the rebuild fundage quickly enough to have the world's first RSTi-NA...
Make it an L-RSTi-NA and I'll bow to you!!!!!

Jay Storm
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Old 10-21-2004, 11:50 PM   #13
G.Subramaniam
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A question to Matt Monson
You are basically using an STI engine, non-turboed, with High CR pistons
Are you doing any cam work and header work as is done in Cobb stage 3 too ?
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Old 10-22-2004, 12:02 AM   #14
RS_to_WRX_swap
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I think to be a true RSTI-NA it would need to have the STI heads aswell; equiped with more suitable cams for N/A. AVCS POWA
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Old 10-22-2004, 12:14 AM   #15
G.Subramaniam
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I think 2.5 L STI fully built engines are available for about $5k
could they be dropped in
( without turbo section )
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Old 10-22-2004, 12:36 AM   #16
Rob K
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I think "IF" we have another N/A engine built after this one is fixed we will do a few thins differently. Custom ground cams, degreed with adjustable cam gears, destroked EJ257 12:1, IRTB,and a different shop to build the engine. Thanks for the support!
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Old 10-22-2004, 03:35 PM   #17
Matt Monson
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Quote:
Originally Posted by G.Subramaniam
A question to Matt Monson
You are basically using an STI engine, non-turboed, with High CR pistons
Are you doing any cam work and header work as is done in Cobb stage 3 too ?
your search button will yield a thread with all my mods and my dyno sheet. short answer is that I have Cobb stage III minus the headwork, for now...

As for the RSTi-NA designation? That is my own creation, and as such I get to determine what goes on it. It will not have STi heads. It will continue to use the SOHC heads that are on the car. If I change the heads, it would be an STi-NA, not an RSTi-NA...
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Old 10-22-2004, 09:30 PM   #18
G.Subramaniam
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So you take the STI block
Add the RS SOHC heads,
Use Cobb cams ??
( would the RS designed cams work with an STI block ? )
and Cobb stage 1 and Stage 2
and high compression pistons ?
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Old 10-23-2004, 02:37 PM   #19
Matt Monson
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That's pretty much the formula. The only thing to add is headwork to increase flow. I am going to be playing with this on my build. I had to back out on my PnP heads from Cobb this summer because I lost my job and couldn't afford the extra couple of K. So, I only have the cams in there right now. I also have an STi v6 intake manifold that flows better than the stock unit that I will be bolting up to this thing. Stock, my heads flow 240cfm intake and the manifold flows 236cfm. There is some power to be found there.

In the spring, I will pick up a set of SOHC heads and plan on only having a valve job done initially. I want to see how much power I can get without fully porting them. I really want to try and maintain my fat torque curve and the crispness of the engine. My thoughts are the porting will drop my flow velocity and kill off some of my bottom end torque. I have gone from wanting to hit 250Chp to trying to maximize the power across the band and under the curve. I know it is a kind of a shot in the dark, but figure the only way to find out is to do it. And I can always go back and get the heads fully ported if I decide there are gains to be had there.

I got to drive a very peaky EJ25 powered L last night, and it is a night and day difference from my car. This other car is worthless below 4000-4500 rpms. And then it is like having a V-tec cam and the power kicks in and shoots to 7500 rpm like a bullet. That car may have more HP than mine (not sure since my headers aren't on right now and it was hard to make head to head comparisons). This other car has DOHC heads with HKS cams in them. There are a lot of differences between the two cars so it is hard to isolate what causes what. On his car the cams are a lot of the difference. He should have his ported heads installed in the next few months and we'll see how his car changes with that addition.

But my car definitely has more torque and a wider powerband. I start making power around 3000rpm and am still making it all the way to 6400 where my fuel cut kicks in. I don't want to lose that low end and am hoping that just the valve work will increase the flow without costing me anything on the bottom. Only time will tell...
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Old 10-23-2004, 09:40 PM   #20
G.Subramaniam
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Does the broad torque band of your car have much to do with your transmission mods
from level ten ?
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Old 10-24-2004, 01:44 PM   #21
Matt Monson
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stock tranny...
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Old 10-25-2004, 02:11 PM   #22
Matt Monson
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Well,
This may not be happening as soon as expected. Started tear down of the Ej257 last. The thrust bearing is shot and the crank has worn grooves in the girdle +/-mm deep. I nearly cut my finger on them! I can't wait to see what the bearing journals look like once it is all the way apart. Anyone want to buy this block?
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Old 10-25-2004, 04:03 PM   #23
G.Subramaniam
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Kevin Thomas on the transmission forum got dyno results showing big improvements by modifying the torque convertor and Valve body on automatic NA
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Old 10-26-2004, 12:33 AM   #24
Storm
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That sucks Matt. I hope you find something suitable soon. Not sure what you could salvage from the block.......

Jay Storm

Quote:
Originally Posted by Matt Monson
Well,
This may not be happening as soon as expected. Started tear down of the Ej257 last. The thrust bearing is shot and the crank has worn grooves in the girdle +/-mm deep. I nearly cut my finger on them! I can't wait to see what the bearing journals look like once it is all the way apart. Anyone want to buy this block?
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Old 10-26-2004, 12:16 PM   #25
Matt Monson
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We'll see. Fortunately I did not pay for it prior to inspection and get to back out. I am going to ask the owner to comp me the oil cooler for my time on the tear down, so it is not for naught...
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