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Old 12-06-2019, 04:49 PM   #1
Jrae2424
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Default (unimpressed with power gains) Now with engine knock.

Went with the 875 cc injectors today with a tune, but the unfortunate happened. Motor didn't blow up in the literal sense but on the last pull at 18.5 psi, hitting 241hp 236tq, an engine knock developed. They said it was rod knock and that the motor would need to be rebuilt.

They said it could cost around 7-8 thousand to rebuild. They said the timing belt will be replaced although it only has abount 20000 mile on it as well as the block, pistons and rods. They said that this is a problem with these rods and that there was actually a lawsuit with the 08 to 14 wrxs because of similar issues. They mentioned the rods and pistons will be much stronger than the previous ones and that they will check the water pump and pulleys and won't replace if isn't necessary.

Does this sound right and am I missing anything as far as whats going to be replaced. And are there other options? Bummmmmer!
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Old 12-06-2019, 07:20 PM   #2
Jrae2424
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Old 12-06-2019, 07:23 PM   #3
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Tell me it's ok!
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Old 12-06-2019, 07:57 PM   #4
NighthawkSTI
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you can get a complete built long block with head work from IAG now for that price range.
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Old 12-06-2019, 09:05 PM   #5
southmichigansubie
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Quote:
Originally Posted by Jrae2424 View Post
Went with the 875 cc injectors today with a tune, but the unfortunate happened. Motor didn't blow up in the literal sense but on the last pull at 18.5 psi, hitting 241hp 236tq, an engine knock developed. They said it was rod knock and that the motor would need to be rebuilt.

They said it could cost around 7-8 thousand to rebuild. They said the timing belt will be replaced although it only has abount 20000 mile on it as well as the block, pistons and rods. They said that this is a problem with these rods and that there was actually a lawsuit with the 08 to 14 wrxs because of similar issues. They mentioned the rods and pistons will be much stronger than the previous ones and that they will check the water pump and pulleys and won't replace if isn't necessary.

Does this sound right and am I missing anything as far as whats going to be replaced. And are there other options? Bummmmmer!

Hey just hold on dont buy an oem short block contact an iag shop so u can get a 2 year warrenty for tht 8k
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Old 12-06-2019, 09:07 PM   #6
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Were are you from theres p&l in chicago and bcp in Detroit if your around michigan
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Old 12-06-2019, 09:38 PM   #7
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IAG has a good track record, but do some reading. There are better options out there in a similar ball park. As for that invoice, just let them know you'll pass on that specific build and thank them for their time.
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Old 12-06-2019, 10:11 PM   #8
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yeah but they are charging him only 2100 for the shortblock, Iag starts at like 3000 so its going to be more. wow your tax is low.. we are going on 10% here i california
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Old 12-07-2019, 09:50 AM   #9
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Were are you from theres p&l in chicago and bcp in Detroit if your around michigan
I'm in western massachusetts, near springfield.
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Old 12-07-2019, 10:18 AM   #10
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I do see the iag stage 1 for $2999 with a 12 month warranty. States it's good for 475 hp. The sti ra short block says 305 hp. If I go with the sti short block will I have to worry about the same thing happening? No warranty on the oem sti block.

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Old 12-07-2019, 09:48 PM   #11
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I'm wondering if there was something the previous tuners weren't telling me. All the work that had been done during the 3 years that the previous owner had the car had been done at one shop. The previous owner did take great care of the car. He spent around 13000, I have all the receipts, on engine, exhaust, suspension, brakes, hoses and tubes. Wheel bearings, hubs and dust shields, all sorts of new engine tubes, hoses, and lines. I know that doesn't mean an engine is 100 percent, but I wonder if there was something the shop knew about but didn't want to tell me.

I brought the car to a different tuner for the injectors and the last tune. Nothing wrong with the previous shop just this one was closer to me.

With what's been done to the car and the shape it is in, I think it's worth it regardless to spend the money on a rebuild. But it does seem strange that the numbers were so low and that the engine went during the recent tune.
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Old 12-07-2019, 10:01 PM   #12
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Are there any transmission upgrades for the 5eat. I figure if the engines apart down to the tranny why not.
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Old 12-07-2019, 10:14 PM   #13
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rods tend to develop "knocks" from detonation. Did you drop the oil to see if there is actual bearing material in it? Did you have to sign some kind of waiver for them to "tune" it??? Id want to see what the A/F and other parameters done during the session.
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Old 12-07-2019, 10:44 PM   #14
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What shop did you or the previous owner go too?
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Old 12-07-2019, 11:13 PM   #15
southmichigansubie
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Quote:
Originally Posted by Jrae2424 View Post
I do see the iag stage 1 for $2999 with a 12 month warranty. States it's good for 475 hp. The sti ra short block says 305 hp. If I go with the sti short block will I have to worry about the same thing happening? No warranty on the oem sti block.
yes you will I actuly got the lawsuit paperwork mailed to me but my car had 103xxxwen I spun a bearing so I was 3k outta the warrenty the is an issue with the factory rods and pistons

and you only get a warranty if you buy the block from an Iag approved installer and have them install it looks like your by quantum raceworks and brentuning to name a few

Last edited by southmichigansubie; 12-07-2019 at 11:25 PM.
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Old 12-08-2019, 06:43 AM   #16
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Originally Posted by turboblew View Post
rods tend to develop "knocks" from detonation. Did you drop the oil to see if there is actual bearing material in it? Did you have to sign some kind of waiver for them to "tune" it??? Id want to see what the A/F and other parameters done during the session.
We did see some small shiny flecks on the end of the dip stick. But we didn't drop the oil pan to see if there was any bearing material.

Yeah, I did sign a waiver to have them tune it. I don't think I signed one at Kinetic Motor Works though, I could be wrong.

Last edited by Jrae2424; 12-08-2019 at 06:54 AM.
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Old 12-08-2019, 06:52 AM   #17
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What shop did you or the previous owner go too?
Kinetic Motor Work in New Hampshire.

They did all the previous work expect the injectors.

I had a base map put on after I had them install the intake then went back a month later for the turbo, fuel pump, and boost controller and a full tune.

I went to EfI Logics in CT for the injectors and most recent tune.

I only held off on the injector initially because I was lead to believe I could get around 260 to the wheels without doing the injectors, but only managed to get 225hp and 196 tq with the vf52, boost controller, and fuel pump.
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Old 12-08-2019, 06:59 AM   #18
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Quote:
Originally Posted by southmichigansubie View Post
yes you will I actuly got the lawsuit paperwork mailed to me but my car had 103xxxwen I spun a bearing so I was 3k outta the warrenty the is an issue with the factory rods and pistons

and you only get a warranty if you buy the block from an Iag approved installer and have them install it looks like your by quantum raceworks and brentuning to name a few
I do that I am close to BrenTuning, Around an hour drive.
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Old 12-10-2019, 06:31 PM   #19
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STI RA shortblock purchased, and away we go.
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Old 12-10-2019, 06:42 PM   #20
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There's not a damn thing wrong with that invoice/estimate for what is listed on there. In fact, I see a number of prices on there that are low.
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Old 12-10-2019, 07:35 PM   #21
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Problem with 08-14 rods? Rods are not the weakest link in the EJ25 motors.
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Old 12-27-2019, 12:59 PM   #22
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Quote:
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STI RA shortblock purchased, and away we go.
Very good choice at your power level!!

Crawford Engineering

Last edited by Quirt; 12-27-2019 at 01:14 PM.
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