Search found 3510 matches

by Kfred
Mon Nov 02, 2015 7:59 am
Forum: Dyno Results
Topic: 502whp/ 428ft/lb 22psi
Replies: 16
Views: 15569

Re: 502whp/ 428ft/lb 22psi

Nice results. You will love the E85. The mid range torque increase is instantly notable with E85.

What cams are you running?
by Kfred
Tue Apr 28, 2015 6:07 pm
Forum: KA-T Tech. Basic
Topic: Dies when clutch it pressed (not IACV)
Replies: 6
Views: 2470

Re: Dies when clutch it pressed (not IACV)

Is your BOV recirculated or atmospheric?
by Kfred
Fri Apr 24, 2015 6:05 pm
Forum: KA-T Tech. Advanced
Topic: wideband not matching ecu
Replies: 4
Views: 3513

Re: wideband not matching ecu

It is common for the AFR gauge and what is logged on your computer to be different, especially with innovate widebands. This is typically due to a grounding issue. Innovate recommends that your ecu, LC2, and gauge all share the same ground post to address this issue. Another issue could be the progr...
by Kfred
Thu Apr 09, 2015 7:11 pm
Forum: KA-T Chat
Topic: My KA build
Replies: 13
Views: 4855

Re: My KA build

You won't need A/C and PS in an 800whp ka-t powered 240sx, because it is not going to be a good street car (lag city). You have a decent parts list there, but that list is not even 1/8 of the cost it is going to take you to make a reliable 800whp ka-t street car. The good news is that it is easy to ...
by Kfred
Thu Apr 09, 2015 6:43 pm
Forum: ECU Tuning
Topic: E85 Timing
Replies: 7
Views: 3406

Re: E85 Timing

BigLouKaT and Matt are both spot on. The burn rate of the fuel is independent of RPM and VE drops off at higher RPMs. Both of these facts say you should have more spark advance at higher RPMs. You should be careful with adjusting for the VE drop depending on what type of fuel management you have. A ...
by Kfred
Thu Apr 09, 2015 6:09 pm
Forum: KA-T Tech. Advanced
Topic: E85 timing at 20 psi
Replies: 9
Views: 3424

Re: E85 timing at 20 psi

Maybe a little late...

I used to run ~20* at 16psi with e85, but I was running a smaller turbo (50 trim). 16* at 20psi certainly seems like it is in the ballpark, but be careful. All setups are different.
by Kfred
Sun Jun 15, 2014 9:32 pm
Forum: ECU Tuning
Topic: Nismotronicsa
Replies: 30
Views: 11311

Re: Nismotronicsa

I'm a CHE here, and I'm just getting into "computer science" stuff. I've been tinkering around with an Arduino, and it really helps accelerate learning.

I understand all of the above and still think that programming the output to 0-2.5v is the best option.
by Kfred
Fri Jun 13, 2014 9:04 pm
Forum: ECU Tuning
Topic: Nismotronicsa
Replies: 30
Views: 11311

Re: Nismotronicsa

I don't know the impedance of the A/D circuit in the factory ECU, but I'd guess it is on the order of 10M. 2.5 volts / 10Mohms = 0.25uA For the most accuracy you want the ratio of AD current to total circuit current to be small (low resistance in voltage divider). The trade off is power consumption....
by Kfred
Fri Jun 13, 2014 1:06 pm
Forum: ECU Tuning
Topic: Nismotronicsa
Replies: 30
Views: 11311

Re: Nismotronicsa

I don't know about the EGR stuff.

Your voltage divider looks right though. What ohm resistors do you plan on using?
by Kfred
Wed Jun 11, 2014 3:20 pm
Forum: KA-T Picture Threads
Topic: Torquefreaks ka-t build
Replies: 85
Views: 21106

Re: Torquefreaks ka-t build

Who engineered that #1 cylinder coil/wire setup? Looks awesome.
by Kfred
Sun Jun 08, 2014 5:54 am
Forum: KA-T Tech. Basic
Topic: Properly set timing
Replies: 13
Views: 3482

Re: Properly set timing

When did you check the compression/leakdown? Before the car died in your driveway or after? It could have very well jumped a tooth. If I were diagnosing this vehicle I would make sure my mechanical timing is correct before moving on to checking EFI components. Checking the mechanical timing is as ea...
by Kfred
Sat Jun 07, 2014 7:30 pm
Forum: DIYAutoTune
Topic: No cranking RPM
Replies: 5
Views: 3439

Re: No cranking RPM

For some odd reason nissan refers to it as the ECCS relay in the FSM and in the parts catalog, but they label it EGI on the fuse box. On S13s I think it is in the fuse box by the battery.
by Kfred
Fri Jun 06, 2014 7:31 pm
Forum: KA-T Tech. Basic
Topic: Properly set timing
Replies: 13
Views: 3482

Re: Properly set timing

125psi across sounds like your cams/crank are likely out of time. The block is probably fine.
by Kfred
Thu Jun 05, 2014 6:42 pm
Forum: DIYAutoTune
Topic: MS2 E-Fan Wiring
Replies: 20
Views: 6301

Re: MS2 E-Fan Wiring

I wouldn't be surprised if the fan pulls more than 20amps. It's not uncommon to have a 40amp fuse/relay for each fan on newer vehicles.

Have you ever had the truck running with the megasquirt ecu? What year is the truck?
by Kfred
Thu Jun 05, 2014 2:58 pm
Forum: KA-T Tech. Basic
Topic: xcessive manifold help!
Replies: 6
Views: 2076

Re: xcessive manifold help!

if your not going to use it dont be afraid to fubar it. sounds like you need more leverage.... id try a large pipe wrench, maybe even with a jack handle over it. theres alwas torches too. Aluminum has a rather large coefficient of thermal expansion.I'd try heating up the manifold with a torch while...
by Kfred
Mon Jun 02, 2014 6:22 pm
Forum: KA-T Tech. Basic
Topic: exhaust help
Replies: 11
Views: 2793

Re: exhaust help

Do you have these boots installed (and un-ripped) around the shifter? I tried to go without these and suffered similar gas fume issues.

Image
by Kfred
Mon Jun 02, 2014 9:03 am
Forum: ECU Tuning
Topic: Electric Fan through Calum RT
Replies: 16
Views: 5988

Re: Electric Fan through Calum RT

After some research I have found that the manual transmission FWD ecus have two, single speed fans and a single relay. Because they don't have a manual clutch fan, I figured they would have had factory two speed fan control, but I was wrong. Basically, the fan system is exactly the same as an S13 (s...
by Kfred
Mon Jun 02, 2014 7:12 am
Forum: ECU Tuning
Topic: Electric Fan through Calum RT
Replies: 16
Views: 5988

Re: Electric Fan through Calum RT

What ECU are you running? Bluebird 91-94?

If this is a sentra ecu you should have satisfactory fan control built in from the factory.
by Kfred
Sun Jun 01, 2014 7:34 am
Forum: Dyno Results
Topic: Advice/Critique wanted 399whp/342tq
Replies: 12
Views: 6673

Re: Advice/Critique wanted 399whp/342tq

Looks beautiful to me. I'd be extremely happy with that power band and power.

My only critique/advice would be to upgrade your rods. At these power levels the stock rods are a little sketchy. I definitely wouldn't rev it any further with the stock rods.
by Kfred
Sat May 31, 2014 11:34 am
Forum: ECU Tuning
Topic: Odd problem with TP and Temperature
Replies: 2
Views: 1859

Re: Odd problem with TP and Temperature

At lower ambient temperatures the TP should be higher for a given manifold pressure. Changing TP with ambient temperatures should be expected. Pressure * Volume = Moles * Gas Constant * Temperature PV = nRT Rearranged: n = P*V/(R*T) For a given pressure and volume, the moles of air increases as temp...
by Kfred
Wed May 28, 2014 7:55 pm
Forum: KA-T Chat
Topic: boosting in 1st and 2nd gear
Replies: 12
Views: 2359

Re: boosting in 1st and 2nd gear

Could be spark blowout. Have you tried changing your plugs? How old are they and what is the gap?

One time my car had spark blowout that only seemed to happen in 1st gear. My plugs were old and a new set solved the problem. It's kind of a stab in the dark, but plugs are cheap.
by Kfred
Tue May 27, 2014 8:12 pm
Forum: KA-T Tech. Basic
Topic: New KA-T Idle Issues
Replies: 29
Views: 6970

Re: New KA-T Idle Issues

I'll do a boost leak test tomorrow as well. I have a feeling its a combination of a small vacuum leak and the exhaust leaks I found tonight that are causing a lean signal at the O2 sensor causing way too much fuel to be dumped. You should definitely fix the exhaust leak and do a boost leak test, bu...
by Kfred
Sat May 24, 2014 7:50 pm
Forum: KA-T Tech. Basic
Topic: New KA-T Idle Issues
Replies: 29
Views: 6970

Re: New KA-T Idle Issues

I'm curious if my MAF is too close to the throttle body. I left the mesh on both sides of the MAF to hopefully make the incoming air more laminar but am afraid there is too much of a bend/too close to the TB. Thoughts from blow-thru users? It's possible that the MAF position may cause idle issues, ...
by Kfred
Fri May 23, 2014 8:58 pm
Forum: KA-T Tech. Basic
Topic: New KA-T Idle Issues
Replies: 29
Views: 6970

Re: New KA-T Idle Issues

It makes more of a difference than you would think. I'm not saying that it is your only problem or that it will fix all your idling issues.

Trying to diagnose idling problems without fixing a known vacuum leak is nonsensical. First step: fix the vacuum leak.
by Kfred
Fri May 23, 2014 8:25 pm
Forum: KA-T Tech. Basic
Topic: New KA-T Idle Issues
Replies: 29
Views: 6970

Re: New KA-T Idle Issues

The way you have your crankcase vent and MAFS setup is definitely an issue right now. You are drawing unmetered air into the crankcase (via valve cover vent), through the pcv valve, and into the intake manifold.
by Kfred
Thu May 22, 2014 3:10 pm
Forum: KA-T Tech. Advanced
Topic: Crank Clearance, need advice!
Replies: 21
Views: 6645

Re: Crank Clearance, need advice!

Thank you for the image, but I'm referring to the bearing surface to crank journal surface clearance. The problem with the clevites is the thrust clearance, not the bearing to journal clearance. If you machinist says to use STD bearings then the journal to bearing clearance is probably ok (never hu...
by Kfred
Thu May 22, 2014 9:50 am
Forum: KA-T Tech. Advanced
Topic: Crank Clearance, need advice!
Replies: 21
Views: 6645

Re: Crank Clearance, need advice!

Here is a good image of thrust clearance (not a KA, but you get the idea): http://www.miata.net/solo/thrustbearingclearance.jpg
by Kfred
Wed May 21, 2014 6:11 pm
Forum: KA-T Tech. Advanced
Topic: Crank Clearance, need advice!
Replies: 21
Views: 6645

Re: Crank Clearance, need advice!

I think the clevites (STD journal size) come oversized on the thrust surface. I would recommend going with a different brand of main bearings. Clevite is a good brand, but for some reason they have oversize thrust surfaces for our motors. Search the site for "clevite thrust" and I'm sure y...
by Kfred
Wed May 21, 2014 4:29 pm
Forum: ECU Tuning
Topic: Nismotronicsa
Replies: 30
Views: 11311

Re: Nismotronicsa

Can your run individual coils with an S13 ka nismotronic ecu?

If I were considering the two, the COP capability would be high on my must have list.
by Kfred
Sun May 18, 2014 6:35 pm
Forum: KA-T Tech. Advanced
Topic: 5000RPM Limiter
Replies: 12
Views: 3469

Re: 5000RPM Limiter

Where would this ground be located and what do you mean serious problem? i am getting a AEM ems series 2 for it would that fix that problem? By serious problem I mean a problem that I probably won't be able to diagnose over the internet. By sending 12v to the ECM on a ground terminal and now having...