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Cielo

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Discussion starter · #1 · (Edited)
Im very stuck... i started this thread with a very long writeup of pros and cons about KAT, SR20, RB25, 2jz engines...i went on to explain everything i learned/read here and in every other 240/nissan forum imaginable... then i deleted it all and now im starting over...

This whole time i was thinking about doing a KA(T) after seeing how insane my friend's one is. i can honestly say it would blow any SR here out of the water (off the line)
Acceleration felt better than my other friend's 455 powered firebird. it felt like my face was gonna come off with a T28 x2 bearing turbo and forged internals.
and for all of you guys saying the KA can't rev high your all W-R-O-N-G. he showed me it reving past 8k in neutral. "don't believe the hype. KA(T) is FTW" he told me.

so i know for a fact that the KA(T) has the accelaration i want... but i never got to see its top speed and that is my biggest concern/wonder.
I want to know how fast i can expect a KAT to be flat out.

I want to know if both KA(T) and SR had stock internals but both had a T28 with 15psi of boost. which would be faster in a 1/2 mile highway race?

I was also looking into 2JZ. i was about to go RB25 until i heard its near impossible to maintain (like the SR) since every part has to be gotten online/hunted for.
but the 2JZ sounds like a vaccume cleaner compared to the RB. and i don't want to sacrifice the clean look of my interior / have a non-working guage cluster as i like to look at my mph and tach rise.
I also don't know how gas mileage is on 2JZ with 92 octane "super unleaded".

But i realize KA(T) is to SR20 as 2JZ is to RB25... a low end torque engine vs a high rpm/speed engine.

when people say they are running x psi of boost and want to change it to x psi of boost, is that done merely by pushing some buttons or turning some nobs on a boost controller? or do you have to go into the engine and do it? thanks. and my original question too please. KAT VS SR20det top speed + gas mileage. those are the only things i wanna compare atm.
 
I i can honestly say it would blow any SR here out of the water (off the line)
...
it felt like my face was gonna come off with a T28 x2 bearing turbo and forged internals.
That, my friend, is a very very big call. Especially since it only has a T28.

I want to know if both KA(T) and SR had stock internals but both had a T28 with 15psi of boost. which would be faster in a 1/2 mile highway race?
Probably the lighter one, or the one with more grip

but the 2JZ sounds like a vaccume cleaner compared to the RB.
Have you actually ever heard the intake sound of an RB25DET? Im guessing not.

when people say they are running x psi of boost and want to change it to x psi of boost, is that done merely by pushing some buttons or turning some nobs on a boost controller? or do you have to go into the engine and do it? thanks. and my original question too please. KAT VS SR20det top speed + gas mileage. those are the only things i wanna compare atm.
If you have an EBC then you can "push a button" depending on the type of ebc. An MBC is usually in the engine bay but you can rig up in cabin ones. You usually turn a knob or dial.

BTW I thought you had a 300hp 240sx?
 
I want to know if both KA(T) and SR had stock internals but both had a T28 with 15psi of boost. which would be faster in a 1/2 mile highway race?
The KA no question.
The SR is only a couple lbs lighter than the KA,
The KA has a lot more low end to get off the line.
The KA will spool up faster due to its added displacement
The KA will have WAY more power than the SR (stock SR boost is 11psi, 4psi is not going to add much to its 202 crank hp)
Gear and redline are the only disadvantage the KA has, but unless its going to travel at 140+ MPH I don't think it's that big of an issue.
 
Discussion starter · #4 ·
That, my friend, is a very very big call. Especially since it only has a T28.
i will humbalize this call then. ive ridden in several SR powered 240s with their owner tryna show me the power and they sort of just "serge" up to about 140 something and not go any faster. it takes a while to get there too. this KA looked 10x worse visually (not to mention the car), but accelaration felt like a muscle car and it easily hit 160 (i feared for my life as i wasn't the one driving, nor would i be doing that speed on our fake interstate hwy) as read by my gps system. and it could have kept going if he hadn't closed the taps from me telling him to slow the fuck down. lol it was exilarating none the less.


Probably the lighter one, or the one with more grip


Have you actually ever heard the intake sound of an RB25DET? Im guessing not.
i was saying the RB sounded better than the 2J imo.

If you have an EBC then you can "push a button" depending on the type of ebc. An MBC is usually in the engine bay but you can rig up in cabin ones. You usually turn a knob or dial.

BTW I thought you had a 300hp 240sx?
and about the 300 horse 240. i lizzeyed so the newb would stop laughing at me. :lamende: i know... i know... but 300+ but under 400 is definitely my goal and i did share that at one point on here.

Gear and redline are the only disadvantage the KA has, but unless its going to travel at 140+ MPH I don't think it's that big of an issue.
See this is the part that confuses me because that night, my friend just proved against alot of people who claim KAs cant rev. he was reving past the tach in neutral and hit 7.5k in gear without a shutter. like he told me, he said "don't believe the hype, all those guys who say KAs cant rev own SRs... and i'm infront of them at all times on the highway"
 
Chances are he disabled it in the ECU (tuned ecu) or unplugged his 5th gear sensor (and neutral sensor to rev past 6,400 in neutral)
We built a SOHC KA (everything bone stock with no machine work or balancing) that revved to 7,200rpm. It only lasted about 75k (#3 rod bushing failed, everything else was fine) but it was fast as fuck for a stock build costing only $180, lol. With proper machining, balancing and head work, I don't see any reason why a KA (SOHC or DOHC) couldn't rev to 8-8,500rpm.
 
Discussion starter · #8 ·
i just cant see it... im actually starting not to like SRs anymore. lol im always getting shown by my friends when i ride in their SRed 240s when they say "check this out". they punch it and... "vUURRRRRRRRRRR pssssch"..... it just seems so boring compared to that KAT... no pull at all when they punch it, just sorta gradually increases speed with alot of noise.. kinda like a hond... god forbid i say it.
 
Here we go again... +1 for the KA-T

I've had both an SR in FWD form and now my KA at 6.5psi in this KA. I'm not hatin on SR's at all, but I am glad I decided to go KA-T. The KA does feel great. The torque is just always there. I'm careful to keep my revs under 7K with stock springs under my BC2 cams. I plan on getting a BC2 valve spring set and an ATI damper and then I'll let my rev limiter out to about 7100 RPMS or so. I can't wait to increase to 11psi using a new wastegate. Not a big fan of boost controllers, just swap wastegates and be done with it.
 
Discussion starter · #12 ·
v8<jz<rb<sr<ca<ka
clearly not a ladder measured in terms of performance yes?

Stock SR Vs KA-T with SR turbo setup same as stock SR. same tires, same car in a drag race = KA-T 1st place from start to finish... but i do totally agree with what your saying... the sr IS prettier than the KAT :giggle:
 
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