No low end power

[DammitBobby]

8.8:1 compression instead of 9.5:1Wider duration 91 camsNewer tires

I would agree with you on that one but I could not pull away from my friends miata that ran a low 14 sec quarter mile. Also with the 91 cams on stock engine I could not use 1st gear it was spinning that much.

One other thing I forgot to mention I have J30 rearend but that shouldn`t effect it that much. I swapped it out after first turbo because the car would get very hard to control in 1st and 2nd gear.

[WDRacing]

Ahhhh...whats the gearing though. They aren't 410's I bet. Gearing is huge bro...

Again, the LAG is what bothers me the most. Bobby, try adding a few degree's of timing. Basically keep going until you hear some mild knock or notice an improvement. When I swapped out a RB20 on my buddies Skyline it was a difference of 3 degree's advance between running like a slow dog or raped ape. Just somthing to try at this point...

[DammitBobby]

Yea I have the SAFCII to monitor knock and with the new knock sensor I am able to get more acurate knock readings. So after the Upgrade on the altenator (Mercury 95 110amp), I will do some more testing and try to bump the timing a few degrees. I will mark the dizzy so that I know what stock timing is. Yea that upgrade is a PITA because now I have it mounted it only haves an inch of movement in either direction going to be a PITA to get the belt on and tighten it.

[PapaSmurf2k3]

time to bust out the 'ol pry bar and hope for the best.Seriously though, I am watching this thread like a Hawk..

.

.

Like a HAWK!!!

[nissanfanatic]

The J30 is 3.96:1 IIRC. That is not much of a difference over stock.

More than likely, it is just a difference in CR and your cams.

BTW, your cam lobes look slightly off in comparison to JWT's install article. In your picture, it looks like the lobes point slightly down whereas in the article, it shows them as pointing slightly up..

http://jimwolftechnology.com/w...E.PDF

I'd check for exhaust leaks. My 50trim makes full boost by 3700-ish for 14psi.

[WDRacing]

I'd check for exhaust leaks. My 50trim makes full boost by 3700-ish for 14psi.

So did mine...

[DammitBobby]

I added another picture to the first thread that I took the same day. I guess before I swap the pulleys again I will take another picture with cam alignment and show the rotor button location.

[DammitBobby]

New pictures I took today showing TDC on the crank with old pulley. Notice in the picture the rotor button location and the cam alignment. I took pictures of both cams to show cam alignment. Let me know what you think.

[DammitBobby]

I think my timing is correct. I notice while looking at the picture the mark on the front timing cover looked like it was pointing at the cam gear mark. I don`t know if anybody else has noticed it but I bet it is a reference point to help check your timing.



I was able to get my new upgraded altenator (110 amp) installed tonight and went to get some dinner when a 2002 gt mustang came up on me and wanted to play. I was able to pull away from him. He heard the open dump pipe and wanted to see what I had under the hood. Pretty fun he was nice about it. So it does feel like it has better low end response. I am going to replace the bkr7e-11 tomorrow morning with bkr7e. I will try to open the gap from .26 to .35 and see what it will do.
Modified by DammitBobby at 9:23 AM 5/28/2007

[DammitBobby]

I was able to install the new BKR7 NGK yesterday. Plug gap is now .35 instead of .25. I was able to WOT in 1st and 2nd gear with no spark blow out. I hope later today I have time to take it on the highway and see if it will go WOT in 3rd gear.

[Chezedik]

So you think it was spark blow out?

[DammitBobby]

No I didn`t have spark blow out because I gapped the spark plug bkr7e-11 at .26. Hard to describe but it took a long time before it would start pulling good. I didn`t have time to data log again to see if it spooled up quicker. I guess that would be good indication if it is really is improving.

Actually what I am hoping on was low voltage to the coil causing low performance.

So far problems found to date: 1. Bad knock sensor 2. Weak altenator ?. Replaced Spark plug BKR7E-11 to BKR7E ?. Open Spark gap from .26 to .35 ? marks because I am not 100 percent positive.


Modified by DammitBobby at 9:38 PM 5/28/2007

[Chezedik]

So why not try running the boost cut switch like Cory had, then hardwiring hot to the battery. Also, check the ground side to the ECU. See if maybe that helps.

[DammitBobby]

I have actually thought about doing that. I wanted to fix the problems first then modify. It would be interesting to see what voltage you have at the positive coil side. Right now it appears to read about 1 voltage less then at the battery terminal. I think I will right down exact voltage reading at the positive coil side tonight and battery. That way we can do a comparison of voltage readings.

[Chezedik]

More importantly check voltage drop. If you have more than .1v of drop you have a problem.

[deviousKA]

Yes 1 - 2 - 4 - 3

The firing order of your engine is 1 3 4 2.

[DammitBobby]

Are you saying that your Positive coil connection at the coil reads exactly the same voltage across the battery terminals?

[DammitBobby]

We were referring to the numbers on the Distributor cap not firing order but thanks for the input.

[DammitBobby]

Voltage readings car at 900rpms with UR pulleys and upgraded altenator 110amp.

Across the battery 14.29VPositive side coil 13.23V

Nissan Data Scan before new Altenator upgrade 13.4v after Altenator replaced 13.9v

I need someone to check and compare it to mine.

Thanks
Modified by DammitBobby at 6:32 PM 5/30/2007

[Chezedik]

Check voltage drop. But 13v at the coil should be good. Your coil could be bad, but it would probably show itself at higher RPM rather than lower.

[DammitBobby]

Here is a couple of screen shots of the data log right after I replaced the knock sensor. JWT ECU 72lbs program. What does everybody think of the timing?

[Chezedik]

What gear? First I assume? Seems kind of low. What method does it use to read timing?

[DammitBobby]

2nd gear pull. Look at the rpms and the TPS lets you know it is a WOT. This is a Nissan Data port log.

[Florida240sx]

My enthalpy ecu takes me down to 12degrees and then back up to solid 14 and the about 17 at redline...

[DammitBobby]

Now that is interesting I thought enthalpy had a more aggresive timing map. Did you use a data port scan? I was thinking of bumping the timing a couple of degrees advance and see what happens. Installed a new knock sensor and can monitor the knocks with the SAFCII.

Had to replace the clutch slave cylinder this weekend. That is the 2nd time had to replace in 3 years.

[Florida240sx]

I got a mdm techtom

[DammitBobby]

Do you have anyway of data logging with the MDM Techtom? I would really like to compare the JWT to the Enthalpy and see if there is any significant differences.

[DammitBobby]

Today I was able to do a 3rd gear pull to 6500 rpms spark plugs gapped at 35 and no miss fire. It appears the 110amp altenator is doing its job. I forgot to check air flow percentage.

[NateDogg]

Timing looks pretty 'advanced' to me. Gauging by the duty cycle you must be at about 17 psi?

I wouldnt have more than 15* at peak torque at 15psi on anything less than 94 octane.

[DammitBobby]

Your close it was around 14psi to 15psi and I am running 93 octane added some octane booster as well. I actually turned it down to 12.5 psi yesterday. The weather is so hot and humid I didn`t want to blow anything. Disproves the theory of JWT timing being to retarded. Also I only have a few changes in the High RPM with I think -5. My AFR`s are around 12. I plan on doing another Data Scan this week to see the difference with the new altenator(110amp). That datalog was done before the new altenator and plug gape changed from .25 to .35.