k24a1 or k24a4

[Blah1219]

Im stuck in a delimma. I can go with a k24a1 for 1400 shipped or a k24a4 for 1000 shipped. I have the money for it. I cant decide. My future plans is doing the valve train w/ mild port and valve angle job w/ jsrc. I know if I want to go for a head swap it would be the a1. But I like economy vtec style. Is there a big difference in the heads?

[yyi]

The valvetrain doesn't have too big of a difference (if any) and the flow is similiar (if not the same). the big difference is the pistons, the k24a1 pistons are compatible with the k20a2/z1/z3 heads while the k24a4 pistons aren't.

hence the higher demand/price for the K24a1 imo

[bolaep3]

The k24a1 head has a better flow so you can get much more out of the a1 head vs the a4 head.

[yyi]

The k24a1 head has a better flow so you can get much more out of the a1 head vs the a4 head.

Has there actually been data proving that the A1 flows better than the A4 head?

I've seen the flow data for A1 vs. RSX-A2 vs. TSX-A2 heads. Are the casting for A1 and A4 different?

[bolaep3]

Honestly I have not found a proven chart such as the one that you and I have seen(A1 vs A2(TSX) vs A2(RSX-S). However I do know on this website kmodperformance.com they use the A4 head for their lower hp applications and the A1 for the higher hp applications. When I asked why they used the A1 for more power the builder said the head outflows the A4 head. I believe in his experience and also have yet to see a build A4 out perform a A1 head.

[yyi]

cool, learn something new everyday =]

[VIZHUNZ02SI]

dam 1400 for a k24a1 you need to pm papituyo form the longblock vender on here you might be able to get it a lil cheaper and he has a but load of vouches from ephatch,clubrsx,k20a,honda-tech etc. i got mines from him for 1200 at the time

[j0000stin]

dam 1400 for a k24a1 you need to pm papituyo form the longblock vender on here you might be able to get it a lil cheaper and he has a but load of vouches from ephatch,clubrsx,k20a,honda-tech etc. i got mines from him for 1200 at the time

got my k24a1 for 950 and k24a2 for 1350. both low miles.

[Blah1219]

dam 1400 for a k24a1 you need to pm papituyo form the longblock vender on here you might be able to get it a lil cheaper and he has a but load of vouches from ephatch,clubrsx,k20a,honda-tech etc. i got mines from him for 1200 at the time

I've been quoted:
(k24a1) 1400 shipped was from papituyo.
(k24a4) 1000 shipped from hmotorsonline.com.

You also live in Florida. Papituyo is located in Florida.

[Tortoise]

Im goin with the a1 because i have jus heard better things in general. Dont have to deal with egr and they hold boost way better. Also can put any head you want on it.

[VIZHUNZ02SI]

I've been quoted:
(k24a1) 1400 shipped was from papituyo.
(k24a4) 1000 shipped from hmotorsonline.com.

You also live in Florida. Papituyo is located in Florida.that is true

[VIZHUNZ02SI]

Im goin with the a1 because i have jus heard better things in general. Dont have to deal with egr and they hold boost way better. Also can put any head you want on it.

yep just got through slapping a k24a2 head on mine's night and day

[ep3jd]

Why is everyone neglecting to tell this kid that the jrsc isn't meant for the 2 4 and won't make power?

[RHCP0801]

if your gonna supercharge it get a kraftwerks kit, the jackson racing kit wont make anything near to what you want and is a waste of money. If you look at jackson racings website, you can see they dont sell that style supercharger for obvious reasons

http://www.jacksonracing.com/

[AUTiger]

they don't sell that kit, because they sold the licensing to it years ago to moss performance. When you do something like that, generally there will be a competition clause. A JRSC will still make good power on a k24, I don't know why you would say it wouldn't. The extra displacement of a k24a1 or a4 will make more than a k20a3. Yes a kraftwerks kit would outperform it, but it will cost you 3x of the cost of a used jrsc.

[ep3jd]

He says it because when he got tuned there was an ep3 with a k24a2 and the same bolt ons as him, with a jrsc, making LESS power then his N/A k24a2.

[RHCP0801]

they don't sell that kit, because they sold the licensing to it years ago to moss performance. When you do something like that, generally there will be a competition clause. A JRSC will still make good power on a k24, I don't know why you would say it wouldn't. The extra displacement of a k24a1 or a4 will make more than a k20a3. Yes a kraftwerks kit would outperform it, but it will cost you 3x of the cost of a used jrsc.

3 times more? not really

http://www.shop.kraftwerksusa.com/category.sc;jsessionid=310432957C78107E6A473628A65 B9F2A.qscstrfrnt01?categoryId=6

when i got my car tuned there was an ep with the same exact motor as me and with stage 2 cams and the jr supercharger did not add much at all. He called jackson racing and they said the old style supercharger's arent meant for the k24a2 and wont get the gains you want, the kraftwerks kit is worth the money since it doesnt cost an arm and a leg and will get you serious gains

someone on here said they made 280 with a jr supercharger on a k24a2, that is not a big increase when an NA k24a2 makes around 230-235 and stage 2-3 cams will get you right at 250-270

[AUTiger]

Someone here made 280 and many others are putting down over 300hp with jrsc on k24a2's. The thing is that the person that you saw when you went to get tuned, probably assumed that any n/a cam would be good for a supercharged application and that is absolutely not the case. Now if he had some IPS ksc in that k24a2 I am willing to bet it would have done 320+.

And yes, I am right about 3x as much. A used jrsc w/ injectors can be had for 1500 if you find the right deal. That kit you posted, that's not COMPLETE. The cheapest kit is 2795 and you will need to purchase an intercooler, custom intercooler piping, bov, injectors and other custom fabrication. And on top of that you lose a/c. All said and done you will be spending 4-4.5k to get it up and running.

I am not arguing that a kraftwerks kit is better than a jrsc, because it is. I am just stating that your rational for a jrsc not working a k24 is not valid. How else would the hasport crx put down over 300hp using a stock block k24a4 with skunk2 cams and a jrsc. It just so happens that the cam profiles of the skunk2 stage II cams work well with a jrsc.

[playap07]

go k24a1 then kraftwork...then your golden!

[lemonhead228]

I was thinkin about goin k24a2 sc. But if the a1 is good to boost I'll go this route cuz the obvious price difference

[mitchlikesbikes]

I was thinkin about goin k24a2 sc. But if the a1 is good to boost I'll go this route cuz the obvious price difference

yeah i think if price is an issue then a supercharged k24a1 is the way to go. a turbo k24a1 is even better though haha

[lemonhead228]

yeah i think if price is an issue then a supercharged k24a1 is the way to go. a turbo k24a1 is even better though haha

I would but turbo is to much lol. I like the sc more(: does anybody kno how much I would have to the wheels wit this set up? Cuz I'm not sure how much power difference it is from the k24a2

[Ba82Ep3]

My k24a1 (DCRH, RSX-S midpipe, EP axleback, AEM v2, KPro, TSX 10.5 pistons, stock cams) on 5psi was enough to destroy 370z's and frustrate a few bolt on Mustang Cobras. I hadnt even tuned past 30 degrees of cam advance yet... so there was plenty of power to be found.

Parts selection is everything. There is nothing wrong with a JRSC... and while the Kraftwerks kit DOES have greater potential... its hard to deny the simplicity and the sound of a roots style charger...

... k24a1, hands down.

[ep3jd]

K24a1 turbo!!! I want to do this same thing. I have a new found love for turbos, I was always into superchargers but I dunno.. Lately I've had a huge boner for turbos

[mitchlikesbikes]

K24a1 turbo!!! I want to do this same thing. I have a new found love for turbos, I was always into superchargers but I dunno.. Lately I've had a huge boner for turbos

monjarassi and superchargedk20 inspired me to want a turbo k24a1 haha

[sleepy ep3]

K24's are for pussies. Real men swap in an Enzo motor.

[Ba82Ep3]

Psshhh... 1.21 jigawatts son!

[lemonhead228]

My k24a1 (DCRH, RSX-S midpipe, EP axleback, AEM v2, KPro, TSX 10.5 pistons, stock cams) on 5psi was enough to destroy 370z's and frustrate a few bolt on Mustang Cobras. I hadnt even tuned past 30 degrees of cam advance yet... so there was plenty of power to be found.

Parts selection is everything. There is nothing wrong with a JRSC... and while the Kraftwerks kit DOES have greater potential... its hard to deny the simplicity and the sound of a roots style charger...

... k24a1, hands down.

Wow, that means I'm gonna push that much power also.

I have rsx-s Injen cai, obx rh, 05 rsx-s midpipe, stock axle back, and kpro.

I might get some f/i cams for my set up too.