Time For The Single/Stinger

[apexi287]

Thanks guys for all the responses. I have been waiting for the rest of the coils this week so I have just been painting parts. Once I get the coils in though I'm going to throw her back on the dyno and pull a lot of timing from my map. I have a headset to detect knock, I have also been pulling the plugs constantly after every pull to see how everything looks. I'm going to keep the bkr7es in and see if I can run with them before I try the iridiums. From the sounds of it there not the best plugs to use with a 1J. I will keep you guys posted hopefully I'll see these coils soon, I was supposed to have them earlier this week:nono:.

 

[hottscennessey]

I think that's the best thing you can do right now. Looks like coils could clear the problem right up.

I'm not trying to be a pessimist. Just more of a realist. In the meantime, look ahead. What if the coils don't clear it up. Start thinking about what else it might be. Have you installed cams? Have you checked timing and valve clearances. The only reason I say this, is because of your power down low. Usually a weak coil will be fine in the low end, but you've still got peaks and dips in your power down low.

Cross your fingers and hope it fixes it but always anticipate the next problem.

 

[apexi287]

I think that's the best thing you can do right now. Looks like coils could clear the problem right up.

I'm not trying to be a pessimist. Just more of a realist. In the meantime, look ahead. What if the coils don't clear it up. Start thinking about what else it might be. Have you installed cams? Have you checked timing and valve clearances. The only reason I say this, is because of your power down low. Usually a weak coil will be fine in the low end, but you've still got peaks and dips in your power down low.

Cross your fingers and hope it fixes it but always anticipate the next problem.

I hear ya, that's exactly how I look at everything too. I've been assuming they may not clear my problem and thinking ahead to be prepared for what could be next, I've learned over the years not to be over optimistic when it comes to cars:nono:, it can easily be a hit or miss sometimes even if you know the problem.

And yes I did install cams BC264's, timing was checked and rechecked and valve clearance was done when the cams were installed. I have the specs somewhere but every cylinder were about all the same from intake to exhaust were right where it should be.

 

[apexi287]

Well I believe I narrowed everything down to the problem today being the ignitor:sarcasm:. It was probably the majority of the problem combined with all the other little problems with the ignition system, not directly showing it to be the igniter:nono:.

I got all my brand new coils in and brand new plugs gapped at .022 bkr7e's. None of that made it better, shortly after I was tinkering around I lost my 1st and 6th cylinder. All coils had good power but they weren't being triggered ground side. I did a resistance check on the ground side from the coil pigtails to ground, 1 and 6 had 1.5xxM Ohms of resistance, all the others that were operating at least decently so the car could run and drive had about 70ohms of resistance.

It's all been so weird everything I did, did make a difference and helped it perform better but at the same time slowly made it worse. I think with all the brand new ignition components and the DLI it's been slowly dieing unlike what you normally see as a no start condition:3d_frown:.

Are there any other tests that can be performed on the JZ igniter to verify it as the problem? I believe those continuity checks pretty much hit the nail on the head, but I just want to make sure before I purchase another igniter:1zhelp:.

I think I'm going to stick with the OE igniter, but out of curiosity what CDI igniters are out there that work well with these cars?

 

[suprahero]

I need to check my ignitor also. It's the stock one that came with my front clip.

 

[suprahero]

Looks like Aaron has them brand new for one hundred and thirty dollars.
http://store.driftmotion.com/static/i-1jz2jzigniter.php

 

[10secdream]

Well I am glad you finally have it narrowed down now.

 

[apexi287]

Yeah my tach signal was also starting to get really giddy, jumping around at startup and whenever I changed dwell settings(same one that came with my clip as well). Like it needed to readjust but couldn't and went all crazy.

Yeah I saw that Aaron had them, I think I'll put in my order today hopefully they are stocked. I gotta wrap things up so I can get a little more dyno time.

 

[bigaaron]

Aaron, 1jz and 2jz spark plugs are interchangable... Go get some NGK Iridium IX plugs for a...... lets say 1996 MKIV.

NGK # - BKR6EIX-11
Most parts store retailers will probably use: 3764.

Just double check to make sure the NGK numbers match

We stock Irridium plugs.

 

[apexi287]

We stock Irridium plugs.

Yeah I picked up some from advance that you guys stock and mine just didn't like them at all, it barely even wanted to run at all. The igniter was probably a large contributor to that but at least I could drive it with the coppers.

 

[apexi287]

Well I have a good/bad update. The tune is working out very nice and the car is running great, cold starts, acceleration, deceleration and WOT. I've made multiple clean WOT 3rd gear pulls and made 380rwhp and 300trq.

The one problem is I believe my waste gate is shot, bought it on the forums used so it was almost expected it may be about to go. The turbo spools up to about 10psi by 4k rpm which seems a little laggy and then slowly creeps boost up to 15psi but not until 7.5k rpm does it build full boost of 15psi, this is just on the gate no boost controller. Which is probably a reason for the low power/torque numbers.

The bad news:3d_frown:. I bought 6 brand new NGK plugs and two of them the porcelain broke and cracked after they ran threw a couple heat cycles. Some got into the the cylinder but I got all the big pieces out, I used a camera snake to verify. This was all last Friday, today I put the car back on the dyno and after doing a good 8 pulls you could hear metal slightly being scrapped in the turbo:nono:. It's all out now but now I need a turbine wheel:cry:.

Luckily it was such a small piece it didn't do much damage, chewed each turbine blade slightly on the inducer side and spit it out. It'll still spool and hold it's boost. So does anyone know where I can find just a turbine wheel and a good place that balances turbos:1zhelp:?

 

[10secdream]

It might not be your wastegate that is causing creep. Normally it is due to a poor manifold design and not the wastegate itself. If you have a fair size wastegate (40+mm) then it should easily be able to support your turbo and power mods. Mine tends to creep about 3psi as I go to 7k so it is a little bit better than yours but not by much.

Sorry to hear about your scraping. Downtime sucks

 

[apexi287]

It might not be your wastegate that is causing creep. Normally it is due to a poor manifold design and not the wastegate itself. If you have a fair size wastegate (40+mm) then it should easily be able to support your turbo and power mods. Mine tends to creep about 3psi as I go to 7k so it is a little bit better than yours but not by much.

Sorry to hear about your scraping. Downtime sucks

That makes sense I didn't want to blame the gate being a F41 I figured it was well big enough. I can definitely see how the manifold especially the one I have can contribute to that slow spool. Pretty sure it's a ebay knockoff that I got from a member on here and it's a fairly small port design, although I'm surprised it isn't a little better seeing as it is a twin scroll type manifold:nono:.

I just need to find a place now where I can find a turbine wheel:3d_frown:.

 

[rwd]

That makes sense I didn't want to blame the gate being a F41 I figured it was well big enough. I can definitely see how the manifold especially the one I have can contribute to that slow spool. Pretty sure it's a ebay knockoff that I got from a member on here and it's a fairly small port design, although I'm surprised it isn't a little better seeing as it is a twin scroll type manifold:nono:.

I just need to find a place now where I can find a turbine wheel:3d_frown:.

your port look good (on the picture)

if you found that you have slow spool;that probably cause the gt40

creep is probably cause by port to the wastegate, cause you have just one(on the picture) and with gt4088r it can't afford

i currently look to buy gt4088r for 1jz , do you recomment it

 

[RacerXJ220]

Is it just me, or does it seem like a detonation issue with the plugs going bad like that??? I ran some champion plugs in my 7M that did that, but only with the tuner did something stupid.


Regarding the GT40R,

I'm on 1.5JZ with huge cams and fully ported head with a GT40R/1.06.

I get full boost (12PSI) at 5200rpms all the way to 6800rpms then it creeps to 14PSI from then on till 7600rpms. It might be laggy for some, but the power up top is exactly what I wanted. and this turbo has a lot left, but I am close to maxing out the single walbro.

DM manifold, 46mm wastegate.

I absolutely love it.

 

[apexi287]

Well to update I figured out the boost issue. All but two of the exhaust manifold bolts were loose. I was taking the wastegate off to check it and noticed two were backing out. I pulled the gate apart and the diaphragm looked good as well as the spring, put everything back together and tightened all the manifold bolts. It now fully spools to wastegate pressure at about 3.5k rpm or so(10psi) and holds steady all the way to redline, I still get a slight miss at about 6.5k-7krpms but I'm still on one not so good coil.

I was thinking of detonation as well from the plugs but I hadn't done any hard pulls after putting them in maybe just one to see if they cleared some things up. I don't think one pull would kill two plugs the way mine cracked, it was the part inside the coil boots that literally almost fell apart(the way plugs look if the boots are loose causing them to arch) boots are very tight by the way.

My new map I don't think the ignition is too aggressive at all, I could maybe pull a degree or two out, but the plugs haven't shown any signs of detonation after a hard dyno pull. It seems to be making decent power for 10psi, but I really don't know how to compare.

Here is the newer MAP...

 

[10secdream]

Well to update I figured out the boost issue. All but two of the exhaust manifold bolts were loose. I was taking the wastegate off to check it and noticed two were backing out. I pulled the gate apart and the diaphragm looked good as well as the spring, put everything back together and tightened all the manifold bolts. It now fully spools to wastegate pressure at about 3.5k rpm or so(10psi) and holds steady all the way to redline, I still get a slight miss at about 6.5k-7krpms but I'm still on one not so good coil.

I was thinking of detonation as well from the plugs but I hadn't done any hard pulls after putting them in maybe just one to see if they cleared some things up. I don't think one pull would kill two plugs the way mine cracked, it was the part inside the coil boots that literally almost fell apart(the way plugs look if the boots are loose causing them to arch) boots are very tight by the way.

My new map I don't think the ignition is too aggressive at all, I could maybe pull a degree or two out, but the plugs haven't shown any signs of detonation after a hard dyno pull. It seems to be making decent power for 10psi, but I really don't know how to compare.

Here is the newer MAP...

You should have no problem with detonation at 10 psi. I am running around 23-24 degrees of timing at 10 psi on 91 pump gas and have zero signs of detonation. I thought my tune was conservative but I guess not hahah.

 

[10secdream]

Maybe I should start looking into a ball bearing turbo. 10psi by 3500 rpm is a lot nicer than 4100.

 

[RacerXJ220]

No fair, OP is using magic. He gets spool faster than I do with .5 less displacement

 

[apexi287]

Haha it's magic, more like a .85 a/r and BB is amazing on the street:sarcasm:. Too bad it all came at a time after my turbine wheel get's chewed up. Balance is probably off I don't see it lasting for too long but who knows, I'm going to use it until it goes because this guy right here is broke:aigo:. I'm on sunoco 93, so I may try and advance it some but I'm going to change my plugs and oil today now that everything has kinda settled in. The tuning probably wore out those plugs a little, they are cheap anyway.