can i get 200 or so rwhp on a ka24de on 95 auto

[jwillican]

i just got my 240sx and im interested if i can get 190 to 200 rwhp out of my ka24de i want to kee it all motor but if i cant get it to 200 that way i will get a supercharger or turbo please help out so i know what i need to start saving money for

[C-Kwik]

Get the turbo or supercharger. To get 200 HP NA out of a KA, will be expensive. Especially at the wheels. 200 HP would be pretty expensive just at the crank.

[keepingthe240]

Supercharger??? You must be new to the 240's 200 at the crank is$3000+ with a 5 speed. An all motor(auto) 200whp would cost you $5000,if not more and not be drivable The ka24e would would cost less to get you there

[jwillican]

why wouldnt it be driveable and how much would i have to spend to be driveable. parts and cost thanks

[C-Kwik]

Ok then, who has a 200HP crank HP NA 240?

[bruinbear714]

Ok then, who has a 200HP crank HP NA 240?

All the bolt ons, plus higher compression pistons will net you about 200hp to the crank. A lot of people are at 150-160 to the wheels with just the bolt-ons.

[C-Kwik]

Assuming with a 15% aborbtion into the drivetrain, 175 WHP would be 200 Crank HP. To get from 160 to 175, you'ld be looking at having to run about 11.84:1 Compression Pistons. Good luck getting that to work on street gas, especially in CA where we have 91 octane as the highest regularly available gas.

So in a sense, 200 HP at the crank is possible on race gas. But to do it on pump fuel would be very difficult and expensive. Or you could just run race gas all the time, but that would be expensive in the long term as well.

[Drift Machine]

I plan on running a 11.6:1 compression ratio, colt reground cams, port and polish, 5 angle valve job, all the bolt ons, and more. I'm pretty sure I'll be netting about 200 HP if not more. Yes it won't be off of straight pump gas, since the highest we have around here is like 91 or 92, I will also be using octane booster. But yes it will be pretty expsensive to have to run octane booster all the time.

So basically I'm just saying I'm pretty sure 200 hp at the crank is pretty possible.

[keepingthe240]

The drivetrain loss is 20% on a 5 speed, a tad higher on an auto Yeah you can run hi comp on pump gas if you run a big cam, if you run the cam, you will loss low end tq......nas sport 240 are making 265-280 hp on a ka24e. 210 is the highest you'll get on the ka24de and be streetable......replacing your fuel injection with 4 carbs would get you closer though

[I am Technoman]

Im sure if i raised compression to 11.6 with chome ringsI could hit very close to 200hp.on 100 octaine

[I am Technoman]

The way I would build a 200hp KA N/a is 370 cc injectors Greddy e manage bigger MAF bigger fuel pump better FPR 11.6 pistons 99 altima chrome rings

Plus all my current mods...

[MarkEmark]

What would....hot shot heades, cold air intake, tanabe cat back exhaust, no cat, electric fans, PDM cams (the 11whp ones..) and SOHC pistons in a DOHC KA, the ones that yield 11.1:1 compression get me for HP, crank or wheel? I'm guessing 175-80 whp...Theres a station with 94 octane like 5 minutes from my house...

[C-Kwik]

But even if you just bump up the compression, in order to effectively make a lot of HP, the parts have to work well together. You start playing around with cams, you'll need to optimize the ports and valves to work well with the cams. Even the header design becomes seriously important. You will really need to start getting into the kind of tuning where the exhaust velocity from one primary sucks air out of the opposite cylinder. This is not a bolt on affair. Typically you need some research behind it.

There are NASPORT SOHC KA's that make 200+ HP even with restrictors. But keep in mind these are heavily massaged motors with high compression running on race gas. Also keep in mind that these motors are designed to rev higher. The stock KA's start running into vibration issues at around 7500 RPM. It's a whole lot easier to make more HP if you can rev higher.

[Drift Machine]

Yes, very good point. It's a little more complicated then putting parts together. They have to work well with each other, everything needs to just 'flow' together really well. But that's when you get into serious tuning, such as blue printing.

C-kwik do you happen to know anything about destroking the KA? I heard that a L20 crank would destroke it to a 2.2L, but does the KA really respond that well to destroking?

[MarkEmark]

Sort of OT, but does anyone have a ball-park figure for how much it would cost a shop (or nissan dealership, probably shop, bc nissan dealerships I'm sure charge more...) to replace my existing pistons/rings with higher compression pistons and new rings? Do you have to pull the whole engine to do this? Is it worth it? I have access to 94 octane all day, so running at 11.1:1 would not be an issue...plus, the 20rwhp is very tempting...

[Drift Machine]

Yeah you have to pull the engine. If you are building up a NA engine it's very worth it.

[C-Kwik]

Yes, very good point. It's a little more complicated then putting parts together. They have to work well with each other, everything needs to just 'flow' together really well. But that's when you get into serious tuning, such as blue printing.

C-kwik do you happen to know anything about destroking the KA? I heard that a L20 crank would destroke it to a 2.2L, but does the KA really respond that well to destroking?

I have no idea about De-Stroking. Frankly, I don't see why you would want to.

[TrunkMonkey]

I heard that a L20 crank would destroke it to a 2.2L, but does the KA really respond that well to destroking?

the L20 crank will not fit without some serious work. me and a few FA memebers had a long discussion about building a hybrid KA and this subject came up.

KA discussion

-demetrius

[keepingthe240]

l20b,z20,z22 might work I spent some time reading that forum....i got bored half way though....how does it end????

[SSS]

I probably wouldn't go the carb route, but standalone ECU with quad throttle bodies, similar to a DCOE setup, but the inlet trumpets enclosed in a fibreglass/carbon fibre unpressurized plenum, fed lots of cold air. Trumpet length would have to be tuned to suit power delivery, short if you want all top end and lower bottom end torque, longer for more torque and less top end.

[TrunkMonkey]

l20b,z20,z22 might work I spent some time reading that forum....i got bored half way though....how does it end????

it ends with me posting an email response from nissan motorsports concerning an L20B crank in a KA.

and here it is...

Demetrius, The KA engine is different than the L Series. Both rod and Mains are different than the L-Series. None of the L-Series cranks will fit either of the KA blocks (truck or 240SX). Not only are the rod shells narrower but the locking tab is on the opposite side from the L-Series rod. The rear crank register of the KA motor is different than the L-Series.

All of the work done here on the KA engines was done with the OE crank. I do not know of any other crank that will fit in the KA blocks.

Steve

-demetrius

[keepingthe240]

That link does have some serious info on pushing the ka

[way2much]

Bruinbear or anybody else...what 1/4 mile times are you hitting with just "bolt-ons" I/H/E? I am just wondering to kinda guestimate what 200hp will get me.

thanks

[bruinbear714]

See below for my mods.

I havn't timed my car or dyno'd it yet, but I'm planning to take it to the track to see what my 0-60 and quarter mile time... anyone want to take a guess?

Other than those mods below, everything is stock, from rims to interior.

My guess is about 6.8-7.1 0-60 and 15ish quarter mile.