Supakat's Thread

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s14fiend
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Re: Supakat's Thread

Post by s14fiend »

At one part it looked like the guy could have been spraying yes you should brake boost.... @1:23 I was saying to myself you better win! lol

You have a hatch for crying out loud s13 is the lightest of the 240sx cars and with your almost ~500whp? Are you sure your maxing out in this race at your max boost pressure?
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Re: Supakat's Thread

Post by supakat »

street_240sx wrote:
supakat wrote:Yes, you can disable soft rev limit. As for power, who knows. Since I am on 3.9 gears compared to 4.10, this is the only thing on my side that is hindering me but I do not want high ratio for the street.

Yea I wouldn't want to go anything taller than 3.9 on stock trans for the streets. I run a 3.69 and its not horrible but I can cruise in 3rd everywhere
I know what you mean. I thought about it but then I just disregarded it. 3.9 is my fave.
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Re: Supakat's Thread

Post by supakat »

s14fiend wrote:At one part it looked like the guy could have been spraying yes you should brake boost.... @1:23 I was saying to myself you better win! lol

You have a hatch for crying out loud s13 is the lightest of the 240sx cars and with your almost ~500whp? Are you sure your maxing out in this race at your max boost pressure?
All these runs are at 20psi. I still have another 10lbs to go. I need to hit a dyno but I really don't care for power as of right now. I am not a dyno queen or want to brag I make 500whp. If you make the power and cannot drive or use the power, then there is no point. Another issue was my rev limiter settings. I am not making any excuses. It is just a learning curve for me as of right now to find the best way to go about things.

I haven't been able to play with the car until last night. Started brake boosting and flat shift rolling start. I am going to e-brake boost. Too scared of the flat shift because I don't want to break something.

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https://www.youtube.com/watch?v=P8Pb9JJ ... EnZcrlmaMA

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https://www.youtube.com/watch?v=h_H7jxM ... EnZcrlmaMA

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https://www.youtube.com/watch?v=GmuiqGY ... EnZcrlmaMA
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Re: Supakat's Thread

Post by ka240de »

Vids look good !
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Re: Supakat's Thread

Post by ka240de »

Hey supa please tell me how your cx racing radiator has treated you i like the price tag
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Re: Supakat's Thread

Post by supakat »

Does the job. No complaints.
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Re: Supakat's Thread

Post by sdaigle240 »

spool diff between hx35 and he351!?!?!?!??!?!?!?!??!?!?!??! thanks.
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Re: Supakat's Thread

Post by supakat »

I am spooling faster with he351 but I also switched to an equal length mani vs log.

Side note: I was helping a friend work on another ka-t with AEM EMS. I basically just needed to do some minor wiring and install the series 1 ems. After getting the car started, the motor breathes good. You can feel the car come alive. The same applies for my friend who I was helping and his s14 ka. Difference between their setups and my setup is q45 throttle body. Same cams, im, and other mods. I am going to order a flange, cut the intake manifold, and weld on flange. This is the next upgrade for the car. Can't wait to see the results.
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Re: Supakat's Thread

Post by aaronlee97 »

street_240sx wrote:
supakat wrote:Yes, you can disable soft rev limit. As for power, who knows. Since I am on 3.9 gears compared to 4.10, this is the only thing on my side that is hindering me but I do not want high ratio for the street.
Yea I wouldn't want to go anything taller than 3.9 on stock trans for the streets. I run a 3.69 and its not horrible but I can cruise in 3rd everywhere
Not horrible? I'm running the 3.54 on mine with stock trans and I love it! Right now I'm running a SOHC transmission so I'm not getting the full effect since the gears are slightly taller than the DOHC trans, but I do have a DOHC one coming soon. Cruising around in 3rd gear is pretty nice to me... Love the extra load to spool the turbo also. Even with my current gearing I don't hit boost until 4000rpm. Curious to see how much quicker it will spool with the DOHC trans.
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Re: Supakat's Thread

Post by supakat »

Near future upgrade. I installed an AEM EMS Series 1 on another ka-t last week. Has similar setup to mine and as soon as your blip the throttle, it revs up. Same applies for my boys s14 ka-t. Only difference is q45 tb. Hopefully can be installed soon.
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Re: Supakat's Thread

Post by supakat »

Better pic for you guys...
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Re: Supakat's Thread

Post by arob987 »

I have a godspeed intake I was thinking about cutting the flange for a q45 tb to match the 3" piping I'm making better.looking forward to seeing your results on it.
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Re: Supakat's Thread

Post by shift_down »

That comparison pic really brought things into perspective. I didn't realize the size difference. Can't wait to see this in action.
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Re: Supakat's Thread

Post by supakat »

arob987 wrote:I have a godspeed intake I was thinking about cutting the flange for a q45 tb to match the 3" piping I'm making better.looking forward to seeing your results on it.
Here is how my bro in law cut it for me. I was busy rubbing down a ski.
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My work, then my boy painted it.
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Had this blue but ran out of paint.
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Base coat.
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Clear
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Re: Supakat's Thread

Post by supakat »

shift_down wrote:That comparison pic really brought things into perspective. I didn't realize the size difference. Can't wait to see this in action.
Me too. I just want to be able to get more area under the curve downlow. My tq really died when I swapped intake mani's but works well on top. (shorter runner length)
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Re: Supakat's Thread

Post by supakat »

Got my manifold back. Just waiting on coupler to arrive.
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Re: Supakat's Thread

Post by BoBaCk1 »

I'm curious to see the difference it makes on your car. My car made right at about 700hp with a stock Intake and stock throttle body on 30 psi. I just installed an xcessive intake and a rx8 drive by wire throttle body, it's 75mm. I didn't want to go to big. I'm not convinced that our motors need that big of a throttle body to make power. But that's why I can't wait to see your results. I'm about to dyno mine soon with the new setup so we'll see . I have my old graph and I'll compare it to the new one. I love reading about the progress on your car,good job.
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Re: Supakat's Thread

Post by supakat »

Thank you sir. Your setup makes nasty power. Keep it up.

I am curious as well. I opted for the tb not for high horsepower but for quicker response/spool. I feel that the car chokes until boost kicks in/force fed. With smaller turbo's, it is not that prevalent since boost is around 3k on t25. Like I stated on two other ka's with q45 tb and similar specs, their motor's woke up as soon as you blipped the throttle.
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Re: Supakat's Thread

Post by TrackStarGT »

that fast response from blipping the throttle on those other KAs, sounds more to do with tuning and injector size maybe, I know the TB will help your setup, but larger throttle bodies tend to respond to higher RPMs, that's where their difference is made.
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Re: Supakat's Thread

Post by supakat »

The last ka-t I messed with just had a base tune loaded with aem series 1. It was running rich as hell and still ran up to 3k with a blip of the throttle. I have quoted this before and will always do. Vinny Ten said "You must $--h!--!!t out what you eat..." Meaning if you have a 3 inch intake, make sure you have a 3 inch exhaust or else choking the motor. Now vice versa, it may not seem that prevalent but what drives turbo's? Airflow. So if you have a bottle neck, it will not let air flow like it should. I have cams, port and polish, etc. and I know how my engine feels. I am doing this for throttle response and spool. You can force air into any motor to make power, but optimizing air flow/fluid dynamics is another thing.

Once you have good air flow and fuel, the motor will become a beast. I lost tq when I switched intake manifolds due to the runner length. So why is this. Is this due to volume or velocity? I think it is both but more less volume. Longer runners hold more volume naturally than shorty runners. Now, with the same manifold and bigger tb, the volume will be the same but the bigger tb will allow more new volume to enter the manifold in order to keep up with the draw of the cams in non boost scenarios. Of course it will help in boost situations but I am not concerned about this right now cause it is a beast on top. I know from 40 mph in second, I have a 2 second lag until boost comes on. If I brake boost, no issues and it gets squirrelly.

As you can see, this upgrade is for response and to get more area under the curve although I never dyno tested it. When I do a virtual dyno log and it shows more area under the curve as well as butt dyno, I will be happy. Today, I should get my coupler and get to bolt everything on. Hopefully, I can go for a cruise to do some light tuning and get the vac/cruise map squared away.
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Re: Supakat's Thread

Post by supakat »

Got everything installed last night except for a clamp. Will go to home depot racing store to get that later today. But the line up and hood clearance is great. I was gonna turn her on last night but the battery was dead. I charged it while the wife and I went to the gym but by the time we got back, it was too late to start. Did not want the neighbors to get mad. I also turned the TB to have the linkage on the inside of the im. I just used an l bracket to make it. I will clean it up and bedline once I make it pretty.

Here is how she sits right now.
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Re: Supakat's Thread

Post by tchida14 »

I like the look of that intake manifold!

I noticed you have a catch can.. Where did you get yours and how is yours routed? Valve cover and pcv to those top ports then clean air before turbo or just vented? I've researched it quite a bit but I'm not sure where to get one and what is the best way to route these things, since it seems like everyone has different opinions on that.
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Re: Supakat's Thread

Post by supakat »

Ebay catch can and I use to have it routed like this:

From crank/breather separator to can. From can to pre turbo intake. Valve cover open. When boost would kick it, it would pull air from can and can would pull air from crank. Fresh air would be coming in from vc.

I noticed I was losing butt dyno power with intake tube connected to turbo so I scratched that setup. I have it vented now. I would like to do this.
https://www.youtube.com/watch?v=wGrx2rvIxJ0
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Re: Supakat's Thread

Post by supakat »

Results: Hear turbo spooling sooner; as soon as throttle opened, turbo starts to suck drastically; low speed drivability is better, much more response; like a beast on top. Great upgrade for a junkyard part.

Did a little tuning today with good results.

https://www.youtube.com/watch?v=ln8feE7Se9U

https://scontent-a-mia.xx.fbcdn.net/hph ... 4878_n.jpg

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Re: Supakat's Thread

Post by supakat »

Here is a quick video and little app I used to get some numbers.

http://youtu.be/4Vi-rIi4P2U?t=59s

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Re: Supakat's Thread

Post by supakat »

Was messing around the other night. I kept blowing couplers off and did not know why. Until Friday morning when I could investigate, I was hitting 33 psi which is my boost cut which then pointed me towards my wastegate. My wastegate line touched the downpipe and melted hence not opening under boost. Fixed that Friday afternoon.

https://www.youtube.com/watch?v=Jr-jnt0 ... EnZcrlmaMA
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Re: Supakat's Thread

Post by airman »

Hmm. You're making me consider working some sort of hard lines for my wastegate/boost lines...

Car sounds great :D
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Re: Supakat's Thread

Post by SIL8D »

If your gate has 10mm x1.0 machine threads you can get an 10mmx1.0 to -4 an adapter....
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Re: Supakat's Thread

Post by TrackStarGT »

airman wrote:Hmm. You're making me consider working some sort of hard lines for my wastegate/boost lines...

Car sounds great :D
I am considering the same thing!
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Re: Supakat's Thread

Post by hpipro4 »

why not use silicone vacuum hoses instead of the regular vacuum hose that will melt. i get my silicone hoses frm this guys. 4mm is the common size for wastegates. http://www.boostcontroller.com/index.php?category=8
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