As to all those SR5 owners with the 4A-F motors, There is apperently actual performance upgrades for these carburated motors. I have recently visited one of my local speed shops and was enlightened to the fact that yes they do make aftermarket parts for our cars, and the list goes like this:
Pacesetter headers
K&N Air filters
You can have a custom exhaust made for your car at your local muffler shop
Now there are alternatives:
They apperenly make a cam kit which includes the cam, MSD ignition and a new timing set directly from Japan for around $700.00 or atleast that is what I was quoted.
You can also do one of two carburator upgrades, one is a Weber which is supposed to be a direct bolt on, or
Getting the custom intake manifold from, yep, Japan for a 4 single barrel carb upgrade. Now the 4 carb upgrade consists of 4 41mm carbs off of a 4cyl motorcycle, Kuni's I do believe, from a 1000cc bike or larger, or you can use some off a 750cc but you'll have to re-jet the carbs to get peak performance.
Doing the Cam kit upgrade with MSD and new timing set, the 4 carb upgrade with JDM intake manifold, with retarding your timing, it is possible to get 180- 200 hp out of your little 4A-F engine.
But if you can't find the intake and know of a good machine shop, they might be able to modify your current intake for you.
200hp is a bit overestimated, with the stock head you wont be able to get that much in NA tune no matter what, stock pistons, theyre the limiting factor.
Sorry to bust your bubble, but you arent the only one who's researched 4A-F tuning, check my posts few years back. Sure you wont be able to get parts from major tuner brands like you can for a shitvic, but who cares, you just get fabricated parts and parts from other cars and fit them on.
I had Keihin CVK's on my car, sure they were different, but the biggest problem with them is that bike people dont know how to tune them on the car, car people dont know shit about them. So you're sorta on your own in the woods with bike carbs. But then again a set of webers does exactly the same thing, theres parts available and knowledge, which is key to tuning them.
Fuel consumption wasnt too bad with them.
Billzilla has a 250hp 4A-FE engine. makes it at 9000rpm. So there.
haha.. I knew flashmn was gonna come and pwn! this whole 200hp+ 4AF deal.
was it that obvious
If I had 25000 to spend on my engine and no laws limiting mods.
I wouldnt stop at a 3S-GTE... I'd have a 1UZ-FE w/ T51R SPL turbo and RWD from a volvo M10 Truck.... AE92 Would fly!!!!Imagine going from a stoplight against a AE92 which would do a wheelstand.
What's so different between the 4A-F and the F-E. both are from the same platform. just one is injected and one's carbed. SAME ENGINE. I'm not an idiot when it comes to cars (or motorcycles for that matter.) I've been doing this for going on 13 years working on cars. and I've been riding motorcylces since I was 5 and building them since I was 13.
Of course with just those mods alone it's fessible, but you could do more, like port and polish your heads. shave your heads by about 10- 20 thousands. But that should be about it.
How can you get 250 out of a 4A-FE and CAN'T get it out of a 4A-F? More fuel + more air + hotter spark + a high flow exhuast = alot of fricken power. Or you can just cheat and put a 50 shot on your stock motor and if you don't use it THAT much, you should be fine. But me, I'd rather spend about $1500.00us to get around 200hp out of a motor that comes stock with about 90-95hp as to 3-5 grand to do a motor swap. That's just me.
BTW you're misguided there, a spark doesnt create power. Only thing a spark has to do is ignite the fuel mixture, by the time its ignited, the spark has long since gone. Thats all it has to do, not a very big challenge for modern sparkplugs. Imagine those V8 chevys producing their power with shitty low-voltage coils. No need for MSD ignitions until you need the adjustability for timing.
Yes, 4A-F and FE are both derived from the same product, however, whilst the 4A-F only lasted for one generation, the 4A-FE has another generation, the 2nd gen 4A-FE, from 93-> onwards. Now one might think a 4A-F is just as good, wrong. Its not, the 250hp 4A-FE is done n/a with the latter generation 4A-FE, which is substancially better in flow than the 1st gen, intake runners are at a MUCH better angle, plus the cams can be cut alot better, because the base circle is such. For N/A tuning the 1st gen head is a boat anchor, it S-U-C-K-S. for forced induction it doesnt matter as much.
Plus in your statement to make 200hp, you never said anything about head porting, bigger valves. Your basic claim was it can make 200hp with a set of keihins/mikunis, paceshitter exhaust, a ricer pipe, msd parts, some camshafts and RETARDED TIMING. Nothing about the head, oh and retarding the timing, in general you make power ADVANCING the timing.
Plus bolt ons can take you only so much, I'd say 150hp is about the max you can get with bolt-on parts on a 4A-F. Not touching the head. Shaving off yeah, that'll get you some increased CR, but the limit is when your valves hit the pistons on overlap. To get 200hp out of a 4A-F, you're gonna need to open that sucker up and ALOT, the head just cant flow enough as is.
Also an advantage for fuel injection is the adjustability, you can run close to optimal fuel setup than with carbs, carbs are always a compromise, fuel injection is absolute, plus its modern. I was a long time carb fan dont get me wrong, I do like carbs even now, however I just reached their limit on my project. With NA sure, you can get away with carbs, but with FI they're a PITA. But while you're at it, why would you settle for carbs from a bike, with the headache they bring, when you could hack off the ITB's from a hayabusa, etc.
I really really really doubt that you can get a 4af to 200hp on stock internals, I say this because i've seen how much work it is to get that out of a 4age (rally motors).
200hp is alot for any n/a 1.6.
To even think about hitting 200hp you would have to raise the revlimit, by quite alot.
But untill we see a dyno graph this is all pointless.
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4A-F performance
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