Def's '93 Turbo - Turquoise Pearl Awesomeness! - Page 6 - MR2 Owners Club Message Board
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post #101 of 105 (permalink) Old May 8th, 2019, 10:15 Thread Starter
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I tried again to seal things up without the aluminum spacers and just the large 18 mm OD o-rings. It was a spectacular fail. I cranked it up and the engine raced up to ~5k RPM before I caught it and turned it off. Looks like some of the o-rings are just partially seated, and there's really no way to fully confirm they're seated when pushing them down.

Soooo.... ordered the RacerX rail, some injector adapters (I need to convert my 11 mm top 48 mm long ID1000's to 60 mm long, 14 mm top o-ring), and some -203 o-rings to refresh all the seals on the injector and adapt the upper portion to 14 mm (looks like it should work).


I really really hope this works, as I'm getting mighty sick of messing with the fuel rail in this car. I've had it out about 6-7 times so far...
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post #102 of 105 (permalink) Old May 16th, 2019, 18:49 Thread Starter
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Some good and bad news.

Good news is the RacerX fuel rail fits well, and is generally easy to install other than all the extra "bits" the lower adapters bring to the table (already lost an o-ring on removal, no idea where it went).

Bad news is that somewhere along the escapades of trying to home brew a lower injector seal setup, I must have run the injectors into the protrusion at the end of the injector bore in the head. So one of them just continually dumps fuel now when pressure is on... That really sucks...

I briefly thought about upgrading to a whole set of ID1050X's, but honestly I'm a little far into this injector upgrade $$$ wise compared to where I thought (home brew 5S-FE rail + buying my old set of ID1000's back from a buddy = ~$200ish buddy pricing, now I'm more like $400 into it and climbing). So I emailed ID and they were really helpful in selling me just 1 matched injector for my set. I'm going to cross my fingers (and replace the missing RacerX lower adapter o-ring) and fingers crossed everything should be fine.

This will also give me some time to make up a new fuel feed hose, as the old one was about 2-3" too short.


Oh well, can't all go smoothly!
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post #103 of 105 (permalink) Old June 19th, 2019, 22:46 Thread Starter
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Been a while since an update.

To sum it up, got a new ID1000 from ID, installed my RacerX fuel rail (kind of a PITA to seat injector adapter cups), made a new fuel feed hose (PTFE -6 AN hose), and then put new band clamps on my outer CV joint boots that were leaking a bit and squirted some Redline CV-2 grease to fill up the passenger one. Driver's side boot was full and only weeping a little grease, whereas the passenger side one took 60 cc to fill up.

I got everything buttoned up and took it for a drive. Surprisingly the VE map wasn't all that far off with some minor adjustments, but the transient fueling was very far off. Still, the EFR 6758 felt great. It responds very quickly to throttle, and generally makes positive boost as low as 1600-1800 RPM with load in a higher gear like 4th gear. Just on the IWG spring, it made ~10 psi, tapering to about 9.5 psi at redline. The power felt strong at just 10 psi, definitely equal to the TD06 I'd say, which makes sense given both can flow ~50-55 lb/min of air. The EFR snaps to power much quicker though, being a much smaller turbo.

Overall pleased with the upgrade. Just need to tune it, and install Stoptech 309 Sport pads on the front, and bleed brakes front and rear with good fluid. Then she should be ready for an exploratory track outing to see how she handles it. I'll probably head out on just wastegate pressure first time, which should be safe enough with soft timing on 92 octane pump gas.
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post #104 of 105 (permalink) Old June 19th, 2019, 23:56
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Awesome, congratulations getting it sorted, can't wait to see how the boost threshold is when tuned.
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post #105 of 105 (permalink) Old June 20th, 2019, 16:48 Thread Starter
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So far it looked like it was hitting 10 psi in the low 3k range (maybe 3.1-3.2k RPM) in 3rd gear just on the WG rolling into it, so a boost controller would likely drop that a hair.


That's about where I thought it'd be, and putting a bit more loading (uphill, 5th gear etc.) will drop that much more. It definitely felt like it pulled hard all the way to 7k RPM, so no worries on the powerband being narrow. It gave me a solid ~1200 RPM more powerband over the TD06, but obviously the EFR is a much newer and pricier turbo.
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