supercharge HELP!!!

[eroxer310]

Hey ephatch so im thinking of supercharging my k20a3 with a "jrsc",i wanna hit 300hp at the wheels,
my question is what can i do to get my motor to do that from head work to the block and trans,

and please dont answer saying, "dont build the k20a3, just get a k20a2, or a k24 swap"

i love my a3 =]]] and wanna build it. But yes
please help wanna hit 300hp =]]

[Sucka]

I'm gonna have to say it.... It's gonna be alot of work and alot of money, but if thats not an issue for you and your rich. I would say you would have to build your buttom and head and maybe nitrous to get it in the 300whp.

I think Roy maybe 306whp with k24a2 + JRSC + I/RH/E? I know if he built his buttom and head alittle it'll make much more.

[eroxer310]

Interesting so, can u please tell exactly why is it that i cant get that type of hp on my k20a3, doesnt the k20a3 have lower compression which allows u to boost more,.

I thought basically the main difference between all other k series motors and the k20a3 was the head,
like lets say the k20a2, i thot the only differnece was only cams, intake manifold and bigger throttle body, or sumthing like that???

[Sucka]

Interesting so, can u please tell exactly why is it that i cant get that type of hp on my k20a3, doesnt the k20a3 have lower compression which allows u to boost more,.

I thought basically the main difference between all other k series motors and the k20a3 was the head,
like lets say the k20a2, i thot the only differnece was only cams, intake manifold and bigger throttle body, or sumthing like that???

I'm not an expert. I got the basic bolt-ons for my k20a3 JRSC + CAI/RH/E. You can ask TalonXRacer He's a motor god.

[eurosteez]

go search around here and read up...it has to do with the a3 exhaust port not being controlled by the ivtec.

if your hella ambitious do this...
rebuild internals (cam shaft, cam gears, pistons, rods, valves and springs etc)
JRSC-RACE with Kpro
work with some kpro tuner to max her out
and add a double shot of Nos and you might be at 300 ponies

good luck

[eroxer310]

go search around here and read up...it has to do with the a3 exhaust port not being controlled by the ivtec.

If your hella ambitious do this...
Rebuild internals (cam shaft, cam gears, pistons, rods, valves and springs etc)
jrsc-race with kpro
work with some kpro tuner to max her out
and add a double shot of nos and you might be at 300 ponies

good luck

so is the a3 basically impossible to get to 300 with out nitrous. That sucks, cuz what u said is basically what i was thinkin to do
buying basically everything, like u said
cams, valves, springs, retainers, forged pistons, rods etc

so whats the best k series motor to supercharge with the jrsc-race with k pro i was thinkin of goin with like 8-10 psi

[eroxer310]

I SEE THESE DYNOS FROM JACKSON RACING

[kprocivic]

k20a2, k24a2, k20a you can reach your goal. prolly the k24a1 and turbo cams with the race kit may put you close but the first three engines will get you there. a gang of people turbo'd the a3 and are running around 300. if ur stuck on supercharging bust out your wallet.

[Lucid Moments]

I've got a built K24 frank with the JRSC and I'm not quite hitting 300whp (296.4). And I've done just about everything you can do. Good luck hitting 300 with a K20a3.

[BlownSi05]

You have a few things fighting you to hit 300whp on a JRSC K20A3. First is the motor itself. The K20A3 was built really as the economy K motor, similar to the K24A1 for the CRV. It has VTEC, but not in the sense as everything thinks of it from the B series motors. You are also starting out at an already lower HP number plus lower compression compared to the other K motors listed above. Another big problem with all the JRSC setups is heat. Since we have no room for an aftercooler/heat exchanger setup to cool the blower and air charge, the only options we have is water/meth kits or nitrous. If you want to run anything over 8 PSI effectively, you have to run some sort of cooling system.

On a K20A3, based on numbers from other members and my own numbers, my thoughts for mods to hit 300whp on a JRSC K20A3 would be:

650cc Injectors
Maxbore TB and port matched S/C inlet
Good 3" CAI
Good race header
2.5-3" Exhaust
Cams and valvetrain (i would suggest the brian crowers)
a minimum of a 50 wet shot nitrous
K-Pro

It is a lot of money and time, which is why I would recommend a swap and then JRSC. You will be happier in the end, trust me.

[superchargedk20]

ur not hittin 300whp on a a3 with a jrsc so dont even bother trying. revhard kit and ull get 300whp on a a3 but even that is the limit. U dont wana go higher than 300whp on a a3

[AUTiger]

low compression doesn't mean jack when supercharged, increase compression to 10.5-11.1, swap on an a2 head(easier and possibly cheaper than cams and valvetrain) get an Rsx-s JRSC and 35 shot of nitrous. And with a good intake and raceheader I am willing to bet you get your goal of 300. A 50 shot would be a little much, most supercharged dyno's with nitrous gain more than the actual shot because of the added cooling effects. A 35 shot could be more like 45-50hp all said and done.

I plan on a taking a supercharging a k24a4 in the future, using my skunk2 stage 2 all motor cams, my injen CAI, my KRRH and a custom 2.5in exhaust. Ideally the blower will be from a type-s. Or depending on the deals I can find in the future maybe a kraftwerks rotrex supercharger.

[cloumep3]

You have a few things fighting you to hit 300whp on a JRSC K20A3. First is the motor itself. The K20A3 was built really as the economy K motor, similar to the K24A1 for the CRV. It has VTEC, but not in the sense as everything thinks of it from the B series motors. You are also starting out at an already lower HP number plus lower compression compared to the other K motors listed above. Another big problem with all the JRSC setups is heat. Since we have no room for an aftercooler/heat exchanger setup to cool the blower and air charge, the only options we have is water/meth kits or nitrous. If you want to run anything over 8 PSI effectively, you have to run some sort of cooling system.

On a K20A3, based on numbers from other members and my own numbers, my thoughts for mods to hit 300whp on a JRSC K20A3 would be:

650cc Injectors
Maxbore TB and port matched S/C inlet
Good 3" CAI
Good race header
2.5-3" Exhaust
Cams and valvetrain (i would suggest the brian crowers)
a minimum of a 50 wet shot nitrous
K-Pro

It is a lot of money and time, which is why I would recommend a swap and then JRSC. You will be happier in the end, trust me.

So, for example, if I'm SC-ing my DD with street kit, I'll be okay without aftercooler or meth-kit? I'm sure I'd benefit from having either installed, but I'm mostly concerned about detonation from high temp...

[vbpracer]

I dont think so much a meth kit or other aftercooler with k20a3 and jrsc s, when the supercharger spins at higher rpms is when you want cooling, 9+ psi. A good tune will remove detonation when using kpro.

[cloumep3]

I dont think so much a meth kit or other aftercooler with k20a3 and jrsc s, when the supercharger spins at higher rpms is when you want cooling, 9+ psi. A good tune will remove detonation when using kpro.

hm..., then going with A3 race kit and using 4.0 pulley which it comes with, as long as I don't put it to heavy load, I should be okay??? Of course it will be tuned with Kpro(not by myself)... and I do baby my ride. Thanks much for your input vbpracer. and sorry for thread jacking OP!