No low end power

[Florida240sx]

Yes I have it wired right because the Distributor cap and plug wires are labeled 1,2,3,4.

mine is the same as what it pictured in that thread

Explain more please?

On your cap your wires go like this correct? If you were to go clockwise it goes 1243 not 1234. 2 1 4 3

[DammitBobby]

I will check it tonight but I would have a bad miss if it was wired incorrectly. I will take a picture of it so you can see it.

[Chezedik]

If you had it wired incorrectly you would have bad vacuum if it ran at all.

[WDRacing]

Aftermarket pulleys FTL...

Swap the stock unit on, get her running perfect then sell that POS crank pulley to some retard.

Damnit Bobby!!!!

[DammitBobby]

Yes 1 - 2 - 4 - 3

[DammitBobby]

LMAO ! Now I know why I can`t getr done Me to retarded!!

[Florida240sx]

Swap pulleys and then report... Check timing without changing anything to see what it shows...

[DammitBobby]

Yep that is what I am going to do next. It will probably be this weekend before I can get to it.

[Chezedik]

It shouldn't matter if it has been verified. There is nothing wrong with aftermarket pulleys, it is just that some of the people who make them don't take into account that they are going to be bigger, and so the timing marks have to be moved by proportion.

[DammitBobby]

Under drive pulley is smaller I would say by 2 inches.

[Chezedik]

Are you sure, because smaller would overdrive. Well, I guess you have them both so, you would know.

[Chezedik]

What ever happened here?

[DammitBobby]

Intalled the old stock pulley and checked TDC with coat hanger in the spark plug hole. Next Checked timing it was dead on. Whole lot easier to check timing with the stock pulley back on. I think tonight I will try to do a video.

The only thing I have left to do is pull valve cover off again and check the cam alignment with stock pulley. Also may try changing the BKR7E-11 to BKR7E. I am running out of ideas trying to figure out where all the power is going.

[DammitBobby]

Forgot to do a video but to I did get a data log on the Zeitronix wideband. I hit 14.5psi at 4760 rpms seems to me it is taking to long to reach full boost.

[Chezedik]

What turbo, and did we ever define what you meant exactly by no low end power?

[DammitBobby]

JWT ECU 72lbs programT3/T4 50 trim .63 AR turbine.

The first post has most of the info.

[Chezedik]

Fair enough, but how do you mean you have no low end power? I see that you have the stock cams. Do you mean that it won't move or doesn't behave as well as in boost? Do you mean that it will not spin tires out of boost? Also, what size turbine wheel do you have?

[PapaSmurf2k3]

...that does seem a little high up in RPMS to be hitting that boost...

[Chezedik]

Maybe a little, but it would also depend on the turbine wheel size. Timing can be properly verified with the vacuum readings, so unless there is a boost leak or a manifold leak I think it can be considered somewhat normal. My question is exactly what is meant by no low end power.

[WDRacing]

I had the exact same turbo with the largest wheels available and got boost faster then that. 4700 is where I saw boost with my TO4E with a .81 AR for fvcks sake...

[Chezedik]

Alright, then has a test been ran for boost leaks and manifold checked for leaks? I guess we are defining 'no low end power' as a higher than normal boost threshold, right?

[WDRacing]

Man I hate troubleshooting from the bench...

Bad timing will effect boost onset, but 4700 is ugly. No low end would have to be an ugly vac leak.

AFR's are solid right Bob?

[Chezedik]

See that is what I thought, but do you realize the amount of dizzy advance that would be required to give 20" Hg if cam timing were off? I am not even sure it is possible.

That is why I would like to know if we are talking about a true lack of low end power or just late onset of boost.

[WDRacing]

To much timing advance will also make for hard starting...

[Chezedik]

We know it is not starting difficultly?

[DammitBobby]

Sorry took so long to answer back but I have been outside all day long. I am freakin tired! Lot of questions have been ask so I will try to answer and report what I have been doing next.

AFR`s are around 11.5 to 12.0 in boost.

Turbo is suppose to be 50 trim t3/t4e .63 ar and compressor .60

Vacuum at idle is around `20.

Timing is confirmed at 20 degrees with stock pulley.

Problem is that I can not spin the tires in 2nd and 3rd gear which it used to on the stock motor with pretty much the same setup. As soon as it would hit boost it would start spinning. Now it wont turn the tires over unless I dump the clutch at 3.5k. The only difference is new Kumho tires and rebuilt engine 8.8 compression. I did swap the cams from 95 to my 91 cams.

I did some more checking today and notice that the voltage across the battery was reading low 13.7 to 14.0. It should be around 14.5 and that reading was with stock pulley. I have been having problems with the battery not holding charge. I replaced it with a Optima Red top and it still won`t hold a good charge. It read the battery today with everything shut off and it was showing around 12.4. So today I decided to replace the altenator with upgrade 110 amp. I did not have a lot of time to work on it today but did manage to get it installed without the belt on. I am thinking of throwing the UR pulley back on since the old pulley is not balanced. Hopefully I will get it done in a few days. I will do a video so everybody can see what it is doing and what your thoughts are.

[Chezedik]

Uhm, here is a list of possible problems (not really):

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

It seems likely that you only have less low end power because of the lower compression. That is pretty typical of low compression setups. The payoff is in the high end.

[WDRacing]

Agreed, but the boost threshold is a symptom of somthing...are you sure you didn't get a .83 AR? Although even that should spool faster. Try not being gay...

[boriquaS13]

Wouldn't lower compression increase turbo lag anyway? Just curious and it really does sound like he may have some sort of boost leak though.

/

[DammitBobby]

Hard to mess that up because Garret stamps the size on the housing .63.