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Everything posted by tylink720
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R33 RB25DET oem turbo replacement options
tylink720 replied to KyoyaR33's topic in General Automotive Discussion
If you are fine with China turbos, Maxpeedingrods makes a bolt on turbo. Ive had mine for two summers now and it seems to be holding up ok. -
Any chance the zero demand ignition table is messed up? Or possibly the minimum tps for it to engage zero demand?
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Possibly my oem fuel reg was already shot when I put the 255 pump in, but yeah it wouldn't come down lower than 50psi I think. Drilled out, then bypassed the venturi, didn't help either. edit: its also hardwired, no variable voltage thing anymore
- 31 replies
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I had to get an aftermarket pressure regulator when I switched to a walbro 255 in my R34. I couldn't get the idle pressure to come down without it, and it was causing a rougher idle as well, although not to the point of stalling.
- 31 replies
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1998 R34 head unit/infotainment
tylink720 replied to Kapr's topic in R Series (R30, R31, R32, R33, R34)
Yep, poor man’s IC7 -
1998 R34 head unit/infotainment
tylink720 replied to Kapr's topic in R Series (R30, R31, R32, R33, R34)
I just ordered a double din android head unit that can display engine parameters with a obd2 scanner. I have a Haltech though, so I don't know if the stock ecu can do this? -
98 er34 gtt replace fuel pump
tylink720 replied to JC71's topic in R Series (R30, R31, R32, R33, R34)
I only put in a 255. Yeah I thought it was strange too. I had seen lots of posts on here saying the stock reg was good for mild pump upgrades. Possibly the oem fpr was clapped the entire time and I only checked fuel pressure after installing a new pump -
98 er34 gtt replace fuel pump
tylink720 replied to JC71's topic in R Series (R30, R31, R32, R33, R34)
When I did my walbro swap, my base fuel pressure increased by about 10psi, which could affect fueling a bit. I had to get an aftermarket fpr bring it back to normal pressures -
Lol I hope to take it out this weekend and rip it around. I’m curious to see how far off my fuel map is now that I’m running 10psi less base pressure. I do need to get a pressure sensor next season to keep an eye on it.
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FIXED I installed the new fpr and turned it down to 43 psi. Idles nicely at 38ish psi now with the vacuum line attached. thanks for the help!
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Stock rail but 1000cc Bosch injectors. Is there a reason for Tomei being junk? Seems like the easiest option since it has fittings and a mount already included
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Any current recs for a good budget reg? I don’t want to buy some cheap eBay stuff, but also don’t want to drop $500 on just a regulator. I’ve seen some for about $140-$170 like Tomei, P2M, NRG, AEM, ect
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Yep lol, half the fun is working on these piles. My brother has a newer BMW and it’s super quick and reliable
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Alright, I've started looking for an aftermarket reg. This cars been a bottomless pit so far, and I haven't even started the proper power mods yet lol. thanks
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Yep stock reg. Ill look into a new reg, just seems strange that it drops the pressure fine when I remove the return line. Also seen posts on here saying the stock reg is good for mild pump upgrades. It is 25 years old I guess
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I don’t think it’s the FPR as I’ve run a short hose into a bottle straight off the reg, and the pressure drops down. Maybe a new reg is a good idea anyway though. I will try doing what you said and test down the line. Although the only spot I can measure is between the hard line and tank, but it’s cramped as in there. I’ll have to lower the tank to get in there. Yep I bypassed the dampener on the fuel return line too but didn’t help. I still have the dampener on the feed. Maybe I’ll test bypassing that one too as I put the gauge before it.
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I've drilled out the siphon pump to a little larger than stock, I think I used a 5/16 bit. Put it back together and still had the 50psi fuel pressure. Took it apart again and ended up breaking one of the fittings on my fuel hat which sucked, but luckily I was able to get a new one within a week. Fit the new hat, and tested the pressure with the siphon pump removed so it just pumps straight back into the tank, still 50psi. I have to assume now it's my return line that's the restriction. I was hoping it would be easy to replace the rear fuel lines that connect to the tank, but it looks like I'd have to lower or drop the tank which looks like a crap job. I will try using an air compressor first to blast out the return line and see if it does anything
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Sounds good, I’ll give this a try. Thanks for the help
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Makes sense, I was thinking it had to be that thing. I will try modifying it first and see if I can get it to work. Is it drilling out the fittings on the hat, or drilling out the actual siphon pump?
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Hey, is there a known restriction in the R34 GTT fuel return? I tested my fuel pressure with a Walbro 255, and have 52 psi at idle, with the regulator vacuum line on and off. The only time I get 43 psi is if I fully disconnect the return line off the regulator and let it flow out into a bottle, so it seems to be something after the reg causing it. I've disconnected both ends of the return line and I can blow through it. I went under the car and don't see any dents or kinks in the hard lines. I blew air into the return port of the fuel hat and it's harder to blow through, but I'm guessing that's because of that tank transfer valve attached to it. I’ve replaced the return lines from the reg to the hard lines as well Any ideas? Thanks
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r34 gtt bosch knock sensors
tylink720 replied to flyingsquirel's topic in R Series (R30, R31, R32, R33, R34)
Just finished doing this on with my GTT with a Haltech, I ran a new shielded wire to Signal Ground, and used the oem wire for the other side of the plug -
IACV / AAC Failing RB25DE Neo, R34
tylink720 replied to _scott's topic in R Series (R30, R31, R32, R33, R34)
Mine started doing that buzzing and then started idling terribly shortly after, it seems to be shot. Maybe try cleaning it? I did clean mine but it didn’t help. Currently just running a block off plate until I figure out an alternative to the oem valve -
R32/33 Downpipe on a R34 GTT?
tylink720 replied to tylink720's topic in R Series (R30, R31, R32, R33, R34)
Update: I put the ISR R33 bellmouth downpipe in on the weekend and it does fit. Obviously it doesn't bolt right up to the catback due to the different length, but it squeezes in onto the turbo side -
RB25 Starting Issues, Possible The CAS
tylink720 replied to tylink720's topic in R Series (R30, R31, R32, R33, R34)
The starting issue seems to be fixed due to replacing that fuse. I also emailed NZ Wiring and he gave me some tips and I have the car working very well now. Had to lower my trigger arming voltages a lot compared to the numbers in the install instructions. Thanks for the help! I do get a trigger error once every couple of drives. It seems to happen when I press in the clutch during a lower rpm decel, or when letting out the clutch at a low rpms. It will happen once, then wont come up again for the rest of the drive or even multiple drives after. Strange -
RB25 Starting Issues, Possible The CAS
tylink720 replied to tylink720's topic in R Series (R30, R31, R32, R33, R34)
Another update for this. I put the NZ Wiring trigger kit on and it was doing the same thing. Scoped the signals and was getting perfect readings off of it. Ended up going through all of my fuses again and found one had blown, one of these ENG CONT fuses. Replaced it and the last 3 starts have been flawless. I'm hoping that this is finally the fix for it! Side note, what do these 2 fuses actually do? I'm wondering how the car was even able to run if it was blown?