Stupid Question

Post by **ride4lame** » Thu Mar 18, 2004 10:34 am

I am raising my boost from stock 7psi to 10 psi next week. I am confident that my front mount and walbro fuel pump will accomodate for 10psi.

Anyways, I was just wondering if it will make a huge difference.Will 3 psi be noticable? I haven't change my boost pressure before...

and yes, this is a dumb post.

Post by **nnkfws333** » Thu Mar 18, 2004 10:34 am

I can feel a difference. I took out my mbc and drove the car for a week. I couldn't take it anymore so I had to put it back in and now daily I have .7 bar but I barely stomp on it.

Post by **goldollar** » Thu Mar 18, 2004 10:34 am

if u got a front mount and an upgraded fule pump then turn it up to 14 pounds if u want it will hold.

Post by **ride4lame** » Thu Mar 18, 2004 10:34 am

t25's lose efficiency at about 13-13.5psi.I was thinkng about boosting at 10psi, seeing my my air/fuel gauge looks like then bumping it to 12. A five psi increase should give me quite noticeable differences.

Post by **MainEvent212** » Thu Mar 18, 2004 10:34 am

yeah, 12 psi is fun stuff lol

Post by **NY S13 SR** » Thu Mar 18, 2004 10:34 am

"t25's lose efficiency at about 13-13.5psi."

They may start to lose efficiency but you still make more power. 14 psi is faster than 13 psi, 15 psi is faster than 14 psi etc etc until you get to about 17 psi then you go no faster.

Want to go the fastest on a T25? Run the wastegate solenoid hose connected to nothing. You will boost to 20-21 psi then settle down to around 17psi. If you have the fuel, this will get you the fastest 1/4 mile times at the expense of turbo long life.

Really, there is no reason to stop at 12, go for 15 psi unless you hear detonation, trust me it is faster and will not kill your turbo.

______________Jeff HHeavy Throttle

Post by **sgpnismo** » Thu Mar 18, 2004 10:34 am

I ran 18psi on my stock t25 in my eclipse I never ran the stock t25 on my sr so Im not really worried about psi levels. My eclit ran a hell of a lot faster at 18psi than at 13psi though.

Post by **dj_lennon_franz** » Thu Mar 18, 2004 10:34 am

the stock ecu and MAFS will only allow the engine to read .9 bar of boost...anything past that is a waste...i run 10 psi stock (i have a FMIC and no cat so the car always boosts 10psi)...on 100 octane 10 psi is enough to take out corvettes and V8 stangs and its more than enough to get my *** end out and sliding even with 200 treadwear tires in the rear....i like drifting...its fun stuff =)

Post by **NY S13 SR** » Thu Mar 18, 2004 10:34 am

"the stock ecu and MAFS will only allow the engine to read .9 bar of boost...anything past that is a waste"

Totally incorrect. The ECU has no way to read or react to boost, and the MAF is good for 280-290 hp (not psi dependant) and that is more than the T25 will produce anyway so it is not a factor.

I have seen it with my eyes and felt it with my a$$ on multiple cars. There is more power to be had over 15 psi at expense of turbo life, but 15 is a good max to use without any trouble.

10 psi on a T25 taking out Vettes and Mustangs? Not unless they can't drive or their car is broken. Even at 15 psi a Vette can still get you.

_______________Jeff HHeavy Throttle

Post by **dj_lennon_franz** » Thu Mar 18, 2004 10:34 am

NYs13...ever run 100 octane on a cold night??? especially with a huge Hybrid FMIC and no cat...ive only been burned by ONE mustang and that was on the freeway one night...he was supercharged..im guessing it was at least a 12 second car...the SR on 10 psi with 100 octane, FMIC, no cat, no resonator, and an air filter is a lil more lethal than most people give it credit for...also what altitude r u at??? all the vettes and stangs ive raced have been from a roll so that does make a bit of a difference...especially since they have to put more effort forth to get the power out when rolling

Post by **NY S13 SR** » Thu Mar 18, 2004 10:34 am

Ha ha I didn't see the 100 octane, that must help! I'm at sea level pretty much. Also we have a large number of built Mustangs around here, rich kids.

____________________Jeff HHeavy Throttle

Post by **dj_lennon_franz** » Thu Mar 18, 2004 10:34 am

yah thats kinda how it is in vegas as well...most mustang drivers have egos bigger than their motors displacement...its really annoying...but yah 100 octane peps the SR20 up ALOT!!! its worth the 4 dollars a gallon =)...if u use it over 91 or 92 octane youll notice an INSTANT difference in the way the car performs..its like night and day...im still dying to try out C16

Post by **Cyberkreig** » Thu Mar 18, 2004 10:34 am

maybe i am wrong.. but i'm not

octane rating does not effect power in anyway ( unles you are talking about detonation and ignition retard which should not be happening at 10psi )

on 100 octane there is no reason why you cant boost up to 15psi & higher.

Post by **jspecnitemare** » Thu Mar 18, 2004 10:34 am

Cyberkreig wrote:maybe i am wrong.. but i'm not

octane rating does not effect power in anyway ( unles you are talking about detonation and ignition retard which should not be happening at 10psi )

on 100 octane there is no reason why you cant boost up to 15psi & higher.

Bingo. The octane rating is just how much pressure the fuel can take before spontaneous ignition (detination). Basic howstuffworks.com knowledge:thinker

Anyway, it is higher quality fuel overall, but I really have a hard time believing that it's a "night and day" difference like dj_lennon states...unless it's a high boost setup and detonation control is needed.

Post by **dj_lennon_franz** » Thu Mar 18, 2004 10:34 am

i boost 10psi cause i dont feel a need for a boost controller...drag racing is more a novelty to me than a sport (MY opinion not trying to insult ne one here)...i drift my car and 10psi is more than enough at the moment for me...but jspec you should know that turbo setups thrive (even stock ones) on higher octanes...what happens when you put 87 octane in a turbo motor??? especially one that is made for an octane rating of no less than 93 (japan and europe)??? you run the risk of blowing the engine up

jspec do you own a SR20det??? or even a CA18det??? if so then try running yer tank dry of yer normal octane (just leave enough so u can get to a gas station lol) and put in a full tank of 100 octane (just spend the money its worth it) youll notice the entire motor smooths out and when you accelerate...the car will actually pull harder than on your average 91 octane

(note: DO NOT DO THIS ON A NORMAL N/A KA24...you will be wasting your money...it is a truck motor made to run on **** octane...the DET series motors are made to run and benefit from higher octanes than that SH1T truck motor)

Post by **jspecnitemare** » Thu Mar 18, 2004 10:34 am

dj_lennon_franz wrote:i boost 10psi cause i dont feel a need for a boost controller...drag racing is more a novelty to me than a sport (MY opinion not trying to insult ne one here)...i drift my car and 10psi is more than enough at the moment for me...but jspec you should know that turbo setups thrive (even stock ones) on higher octanes...what happens when you put 87 octane in a turbo motor??? especially one that is made for an octane rating of no less than 93 (japan and europe)??? you run the risk of blowing the engine up

jspec do you own a SR20det??? or even a CA18det??? if so then try running yer tank dry of yer normal octane (just leave enough so u can get to a gas station lol) and put in a full tank of 100 octane (just spend the money its worth it) youll notice the entire motor smooths out and when you accelerate...the car will actually pull harder than on your average 91 octane

(note: DO NOT DO THIS ON A NORMAL N/A KA24...you will be wasting your money...it is a truck motor made to run on **** octane...the DET series motors are made to run and benefit from higher octanes than that SH1T truck motor)

I just run my trusty KA...but I can see what you're talking about though. BTW it comes in more cars than trucks, so I would call it a car motor. The KA is a wonderful powerplant, although a little bland until you turbo it. If at some point I decide to swap, it will be with an RB though.

Post by **dj_lennon_franz** » Thu Mar 18, 2004 10:34 am

sorry the KA24 is a POS motor...its not a car motor...its a truck motor...the reason nissan used it in cars (if you look at the cars it was used in) was because it had just enough torque and HP to move those cars around because we couldnt use the SR20det or the CA18det like they were meant to have...the KA requires WAAAAAY too much tuning and tinkering after 8-9psi...its not worth the money or the time and effort...once you get past 9psi it requires a stand alone fuel management system..better injectors..much stronger bottom end...basically money wasted that could go into building a CA or SR that would still out power that waste of a motor

Post by **sgpnismo** » Thu Mar 18, 2004 10:34 am

ok dj, drag racing is a sport, right now drifting is more of a novelty than a sport, and the doch ka is not a pos motor and just because it was in a truck doesnt make it a truck engine. I have a s13 w/redtop and a s14 w/dohc ka and im building the ka and turboing it because its not a pos motor. Don't get me wrong though I dont like drag racing very much just cause its boring but it is a sport.

Post by **Cyberkreig** » Thu Mar 18, 2004 10:34 am

Hi Dj. Uhm, i;m the one that said you were wrong about the octane thing.. you could try talking to me instead of attacking other people & their motors. You completely dodged the issue and then made a very stupid, and very inflamitory remark about the KA motor. The KA is far from a POS, it is a stout reliable motor that does everything it was designed to do and more.

Sqpnismo - While any motor can be used for any car-sport. It is my personal feeling that a turbo ka is actualy better suited to dragracing. most of the off the shelf turbo kits are later spooling turbos. The ka has the lo end tq to get you off the line. and with 2.4L of displacement and a stroker motor you could build a very strong bottom end, strap on a large hi-horsepower turbo and run 10's all day long. this shape of powercurve can be a handful on the twisties tho. again, just my opnion, i am sure the ka can be used for anything if tuned right and driven right.

Post by **Onizuka** » Thu Mar 18, 2004 10:34 am

The KA in the 240sx isnt a truck motor per say, especially the KA24DE seeing as how it didnt make an appearence in trucks until 1998. The KA also has a block and crank so rediculously overbuilt from the factory it looks as if turbocharging was planned.

Why hate a nissan motor, they all are incredibly awsome. Except for the GA16DE, that motor can die.

Post by **extheflow** » Thu Mar 18, 2004 10:34 am

while the KA has a lower rev limit i'de like to see dyno charts comparing the KA and SR with the same turbo. i'll bet the KA spools it up considerably faster given more displacement and higher compression.BTW at first i thought this whole thread was stupid and full of misinforamtion,then i realized if you just take out all the posts by dj_lennon_franz it's ok.

Post by **dj_lennon_franz** » Thu Mar 18, 2004 10:34 am

i wasnt trying to attack ne on the board...i have a difference of opinion just as everyone else does...dont take it to the butt already...i have had nothing but bad experiences with the KA and everyone i know who goes to an SR or CA or RB hates the KA and its understandable...i owned a single cam and it was a POS...sorry...i know that they are the better of the 2 KAs for turboing but its a truck engine...always has been...always will be...there is a reason why nissan never used it ne where else in the world for their sports cars...you have to do so much to them to make them fast that its really not worth it...the SR and CA put out much better numbers for what kinda money you can sink into them...if you like yer KA good for you im not gonna sit here and knock you down for it...but compared to the actual sport motors nissan produced they are quite crude...but hey if you wanna make your KA fast and turbo it etc etc then hey more power to yah...so calm down guys...wasnt trying to start ****...was voicing and opinon...so dont take it to the nipple

and sgpnismo...drifting is a sport...ever hear of D1GP??? drifting is a fully fledged motorsport that is already world renowned for having some of the best drivers competing in it...its just as popular as drag racing...even more so in japan and europe than here

Post by **ride4lame** » Thu Mar 18, 2004 10:34 am

*update*12 psi is WAYYY faster then 7psiI am going to track it in a few days...also...don't think you can drift 12psi the second you increase the boost...lets just say know i need body work

Post by **Cyberkreig** » Thu Mar 18, 2004 10:34 am

Body work? whats that?

here, one of these will fix it.

http://www.jspec.com/kstyles13.html

Post by **ride4lame** » Thu Mar 18, 2004 10:34 am

Cyberkreig wrote:Body work? whats that?

here, one of these will fix it.

http://www.jspec.com/kstyles13.html

ahha, 25 for stickers is too much.i am just gonna put tape over it that says "march 22, 2004 10:47pm Drifted into dirt embankment and almost flipped (first real drift no 12psi) "

Post by **Cyberkreig** » Thu Mar 18, 2004 10:34 am

you know whats funny is that i tagged a dirt embankment and scuffed my bumper, miffed my alighment only slightly, and got dirt all stuck in my rims.. also my first real drift, also at 12psi.

Post by **ride4lame** » Thu Mar 18, 2004 10:34 am

i dented my exhaust, broke off patr of my ...um, i guess stock side skirt? which i didn't know 240s have...but a peice of fiberglass came off...also scraped up my downpipe, and maybe did minimal damage to my frame...

i went into a turn way to fast, I usually go into it at 35. i went in at 50. speed is bad sometimes. I need suspension

oh, and if people wanna flame me for street drifting, go ahead...i can take it. just note that i do it on backroads at like 3 in the morning...

Post by **thes14project** » Thu Mar 18, 2004 10:34 am

I miss my KA

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