www.ka-t.org

The speed of sound ~1125 fps @ 70*F, is a limiting factor for air speed (super sonic nozzle). I've observed from online research on intake and exhaust port velocities, people have "rules of thumb" stating target mean air speed velocities, and percentages of the speed of sound. Usually this...

I took some rough measurements of the intake ports and calculated air velocity at different cfm of air flow. Based off of my initial measurements it's no wonder why the ka responds so well to boost... I'd feel better if someone else independently posted some numbers based off their measurements of t...

Thank you very much for your contribution! I spent the entire day yesterday reading through all the articles that you've linked to this thread... I'm feel like I have a much better understanding on cylinder head ports, "porting and polishing", and flow bench design and interpretation of fl...

^^^ They are not RB26 studs, they are from a 2.0 liter pinto. I'm sure the pn# was listed earlier in the thread. Finally dyno tested this engine configuration. The best run was 442rwhp, 396tq. In the end we were averaging 425ho & 370 tq. I sprayed Ethanol pre throttle body using a water meth, AE...

15x10 Spinwerkes

I recommend verifying your ignition timing with a timing light. It should be solid @ idle with no jitter (I noticed +/- 3* jitter with the incorrect dwell settings). If you are overdwelling your coils, they will fire on there own when they over charge. Timing will advance with rpm. Set your ign timi...

These are nothing to be proud of, but here they are anyways. I was battling a misfire, cold engine temps, and boost control issues causing late spool. ignition timing was super conservative, and a/f ratios were never dialed in. I'm optimistic that 10 psi will net me 300 rwhp, and much more torque do...

I verified ignition timing was solid up to 6ms with this dwell correction curve. http://i1217.photobucket.com/albums/dd398/conedodgers/untitled_zps949cc635.jpg http://i1217.photobucket.com/albums/dd398/conedodgers/LS2truckcoilOEMdwell_zpscd155dc4.jpg I've now got my dwell set to 4.5ms, and the engin...

Supa, I was just digging around through your MSQ, to see what your dwell settings were at. Are you running LS2 truck coils? 5.5ms is very high for LS2 coils. Do you have the oem dwell vs battery correction curves entered into your MS? I've had lots of issues with the LS2 truck coils because of their...

Anybody want to guess what I made at 10psi? -DynoDynamics Dyno -11.5:1 comp -GTX3071 .63 a/r ex housing, JGS log Mani. -E85 -Conservative ign timing -no intercooler -175F IAT's I ended up with a multitude of problems, so I cut the tuning session short. I made more power @ 10psi then I did @ 15psi, m...

My current favorite mod is Front knuckles/drop spindles. A shortened steering arm increases the steering ratio, & The response and feedback is amazing, it's one of those things you have to experience to understand. Shorter steering arms is right up there with shocks/springs/coilovers.

Hhhhmmm.... For the PnP' ECU's, you'd think they would use a bias resistor to suit the oem clt temp senser, rather then use the same standard GM clt bias resistor.

The GM bias resistor works ok for the Nissan clt temp sensor, but it's not optimal.

Nismoautoxr & the op, I'd like to see some pics of how you mounted your tablet's. I'm al;most ready to mount mine soon. Right now I'm going to just run my GalxyS2 mounted onto the steering wheel. There are lots of crappy mounts on the market, i'd like something solid that does not vibrate around...

I have not updated this thread in awhile. I wore myself down a little trying to get my car ready for the racing season. I'm very optimistic about the direction my car is headed. The car set the 4th fastest time of the event, which was a huge surprise, considering that I had to hack together a tune &...

I just found this video of what knock sounds like through a professional knock mic. http://www.youtube.com/watch?v=GGJZ6kKzLus[url][/url]

i'm totally sold on having a knock aux output with an amplifier, built into my center console. I have too many cords running to my laptop, & things get tangled up. It would be nice to just plug my headphones into the console, & if I wanted to listen to knock through my laptop, I could just p...

Thanks for the help on the car & for building me a knock mic! If only my laptop would stop having issues (it finally kicked the bucket last night) I'd probably have got my car tuned by now. I did finally go for my first test drive, but no laptop=no knock mic, so still not sure how well it works....

With oem rear gears, and my 275/35/15's I'm at 66mph @7500rpm. I have a 3.539 final drive that let me touch 76mph @ 7500, & 73mph @ 7200. That final drive is why I'm trying to dial in bottom end & midrange torque. I will swap in a 3.69 gear set if the 3.54 is too tall. I may have two differe...

Excerpt from http://www.rbracing-rsr.com/camshaft Doh... Fixed this link for our available cams. https://docs.google.com/spreadsheet/ccc?key=0AsCG_qyIUE9ndExkUkt1TV9hR3JWcGdVdERqczl3ekE#gid=0 Just wanted to back up your spread sheet with my findings. All of my own personal measurements match up wit...

I tested/degreed multiple oem camshafts today. I came to the conclusion that all of my cam sets are the 232/240 combo's. The 232's about .335 lift @ .010" valve lash. 240's have about .350" lift at .010" valve lash 232's have 198-199 deg's duration @ .0.50" 240's have 206-207 deg...

I hope you put a radius on the lip of the combustion chamber. Sharp edges cause hot spots and detonation. I chamfered all of the combustion chambers by hand. I also smoothed out the threads around the sprak plug area. I'm more worried about pre-ignition then detonation. I'm going to start tuning wi...

I see your problem now that you have posted a picture of your bay and I can see how your turbo is mounted (in my head I was still picturing a T2 style setup like mine) Either way where is this line going? This is the one I have my coolant returning into after the turbo. It runs pretty level with a ...

Here are the results of my latest test. Camshaft Calculations - Lobe Center / Duration Your 240/248 has an Overlap of -40.00 degrees and has in Intake Duration of 198.00 degrees. The Exhaust Duration is 205.00 degrees. Your Lobe Separation Angle is 120.75 degrees. The Inlet Cam has an Installed Cent...

I just tested some OEM cams that I've had lying around & I'm questioning the results. I could not get the proper angle (dial indicator should be perpendicular to the lifter) on the bucket/shim with the new dial indicator setup. I need to make an extender tip tomorrow... I don't think I have the ...

Are worried about shim/cam wear or is it that you want less duration out of the 272's? I've got a few extra cams lying around... I'm worried about running them tighter then oem spec, and burning an ex valve. also worried about the extra duration a little. I'm going to swap in my 240/248 oem cam com...

Got the engine started last night.... I ran it without coolant for 2-3 min's to get some heat into. It was pretty uneventful. Compression was 150psi before starting & 175-180psi after running it. I excpeted a little more cranking pressure then that but all the cylinders are even. & i'm sure ...

^^^ Are you talking about my oil feed line that runs next to my coolant return? I have a thread going on NRR about my -4 coolant hoses. http://www.nissanroadracing.com/showthread.php?t=4393 http://i1217.photobucket.com/albums/dd398/conedodgers/20130303_152209_zpsbccc152f.jpg http://i1217.photobucket...

I'm using the block drain on the exhuast side for a feed using a 1/4" BSPT to -4 adapter, and the bleeder port as a return. I drilled & tapped the bleeder port to 1/8" NPT. I'm a little concerend with the -4 coolant lines, but more concerned with the placement of the return hose since ...

I love the DIY aspect of this build. Very nice job with the plating. I've always wanted to buy the Caswell coating setup...

Plumbing in coolant lines for the turbo using -4an ptfe braided stainless hose. Probably one of my favorite hoses to make. They always turn out so clean! (ignore the tape on the hose, still mocking things up, the hose is not even connected to the hose end yet) http://i1217.photobucket.com/albums/dd3...