K24Z7 4Piston Drop in Cam Dyno Tune

Tuning by Nick
Honda / Acura Dyno Tuner
Toronto, Ontario, Canada
[e-mail]
Dynojet 224xLC Load Control Dyno Tuning
KZbin - ‪@grassrootscience4461‬
IG - @grassrootscience
9th Gen Civic Si
K24Z7 Engine
4Piston DIC - Drop in Cams
Acuity Cold Air Intake
Honda Ridgeline Throttle Body
DW 550cc Injectors
Full-Race Downpipe
GESI High Flow CAT
Full-Race Cat-back Exhaust

[@SanicGottaGoFast]

Those are crazy gains from drop in cams. The mid range is so meaty.

[@grassrootscience4461]

Feels great on the road. Nick did a great job.

[@IsaacPoopsAlot]

nearly 190lbs of torque on an NA setup is insane for how little parts were put into

[@timprice8877]

Right! Vtec prob smacks you in the face like a little k03 turbo 😆

[@jesuscontreras2499]

I’m so glad I came back to find you channel

[@mich992]

Wow didn't know 4Piston had cams! Great to see a new video

[@victorsabala2108]

k24Z3/Z7 is underated

[@dangerm3496]

Great exhaust note

[@joeymcquilkin3670]

THANK YOU for proving so many things! The RBC is not worth it in my opinion AND I’ve recently been looking into these cams and there’s not a lot of info/videos so this is perfect! About 10whp and 8-10wtq BUT steep upward power curve holding strong to redline. I like it I bet it runs real good

[@grassrootscience4461]

Feels like a much bigger engine below 4,000rpm

[@joeymcquilkin3670]

⁠@@grassrootscience4461 I bet, the power curve is super linear like it carries all the way through the rpm range

[@iron-gamerstv]

I'm impressed with the numbers and how quiet the car is. I'm catless with the 3 inch down pipe and I sound like I have cams. (Not what I wanted 😂) I opted for the RRC manifold from a type R with a j37 throttle body. My mid range pulls very hard. He would be happy with a bigger manifold. Great video Nick 👍.

[@grassrootscience4461]

@@joeymcquilkin3670 yup. You start to feel it lose at about 7,000rpm which I expect with this setup

[@backyard9144]

Exactly same here ! That Rbc is not worth it in my opinion. I’m doing the cams and rest of bolt ons but no Rbc swap . Great information!

[@MrKylev35]

I miss my 9th gen so much 😭. I would have thrown these in for sure!

[@slowka]

Nice vid, I have a HondataFP tuned 2013 FB6 with just K&N/Yonaka 3".Very interesting vid,subbed.

[@danbrown5850]

Great video

[@samhendren1171]

Great torque numbers

[@vtecjustin]

214hp, 189tq @4:02

[@grosbig983]

Whp

[@jarebb1]

Considering most stock k24z7 engines come from the factory laying down only 160-170 whp on most Dynos, this is pretty impressive on the plastic manifold. Can’t wait to see someone use an sk2 ultra manifold and these cams. 4p racing already have shown what the motor can do with ITBs and more compression.

[@_Silver15Si_]

I’m gonna be running skunk2 ultra manifold but with skunk2 cams instead, hoping to have it done soon.

[@jarebb1]

@@_Silver15Si_ that should be a nice setup. Hopefully we will see a lot more of these kinda builds.

[@DruNicholsMD]

Lookng forward to the Z7 vs RBC intake manifold comparrison!

[@Otaaaz]

Love this civic

[@grassrootscience4461]

Thank you! I have a bunch of videos with it.

[@janushannj4725]

@@grassrootscience4461hey do you have an instagram i can msg you on?

[@lcq4blackstar]

Nice! Very interested to see the graph overlay with RBC manifold swap when that gets done... Everyone with First Gen RDX wants to run the RBC manifold but I keep saying the 9th Gen plastic manifold is the way to go because the auto trans is limited to 7k RPM and all they are doing is loosing power where our engine lives. The last graph showing between 4P cam/no cam stock manifold neither rolls over until 7100-7200RPM. My prediction the RBC will be down compared to stock manifold until 6800 then beat it to redline for the 9th Gen in your video here. For 1G RDX I would go the plastic manifold for FMIC (it is THE best OEM manifold for a 7k redline) For TMIC stock ported 1G is the best option

[@dTheHammerb]

Nice!

[@cleezcs]

Really hope someone gets the skunk2 stage 2 cams on the dyno

[@thecloud1432]

The performance is clear. I'm just waiting to see how reliable this setup is. The Z7 has been out for a long time but we finally have a set of mild drop-in cams. And apparently skunk2 just came out with some as well.

[@TheBb6prelude]

Should as reliable as stock

[@Edge5055]

I like you videos. Been watching you for awhile. Very detailed. If possible, can you do a comparison of Brian Crower Stage 3 cams vs DC drop in and/or 4 piston Drop ins? I have BC stage 3 but everyone beating me up about “what I should have bought”. Of course my motor is fully built with BC stroker lightweight. I’m just more interested in camshaft results between different companies.

[@DrewsR6]

Stage 3 vs a drop in cam? Why

[@TheJoaoppk]

Any info about DC 4.5 cams? I'm building a k24a4 with k20z3 head with those cams

[@balls.g]

Skunk2 cams next please!!!

[@TheEPICDUDE132]

Please make another video with the RBC intake manifold with the cams when he comes back

[@grassrootscience4461]

I will be back hopefully before someone else lol

[@TheEPICDUDE132]

@@grassrootscience4461 Super curious to see what it’ll do! Your car looks fantastic btw

[@grassrootscience4461]

@@TheEPICDUDE132 Thank you really appreciate it!

[@marcusmoore8927]

Have you seen anything with the Skunk2 racing cams?

[@yannixenos2314]

💯👍

[@MVMPRODUCTIONS21]

Rbc would definitely help you get 230. Good numbers tho

[@WelshyAutomotive]

are these the same as the skunk2? be interesting to see.

[@johnl.38]

how important are the throttle body and injectors to achieve what we are seeing here?

[@MrSandoval91]

😮 now imagine what the cams can do with a 3 in catless exhaust 1000cc injectors rbc intake and on e85 🤯

[@tonym4136]

And All Ported I believe it could hit 230whp 210 torq

[@Otaaaz]

What happened to the k swap boxer?

[@RagingBullNuts]

I’ve been waiting for this. What’s the elevation there?

[@grassrootscience4461]

200m

[@johnnycarlson1405]

That’s crazy, I have skunk 2 CAI and the Skunk 2 full race exhaust and tuned out makes 218 hp. Now I’m wondering what it’ll make if I do the drop in cams with the RBC manifold and throttle body upgrade..

[@grassrootscience4461]

We will find out in a few months

[@kballs94]

I LOVE NATURALLY ASPIRATED ENGINES

[@wifiluna7632]

what's your full build list my man? that's crazy gains on an exhaust and CAI

[@e_yiizy]

Just curious: is there a solution for the RBC torque dip/loss?

[@CL9k24a3]

Porting or trash it and get rrc. You can see on gears and gasoline when they put ported rbc that dip goes away. Video is " k swaping my civic again or something like that

[@evan0927]

Is it worth it with the factory head?

[@Esox923]

What rpm does the i-vtec crossover on the 4piston cam tune? Graph looks nearly seemless

[@grassrootscience4461]

5100rpm

[@jaynuck]

That powerband is super impressive. No issues spinning the stock motor to 8k?

[@grassrootscience4461]

None so far. I usually shift around 7600 unless I need to rev it out on track .

[@erindeveyra26]

How much of a difference did the rdx injectors vs 500cc/550cc make? Or would it be negligible

[@grassrootscience4461]

Probably none. I only got the 550 because they were on sale for the same price as used RDX injectors at the time.

[@bootattack8]

What exhaust is that i want that on my 09 accord exl has the k24z3

[@grassrootscience4461]

Fullrace down pipe and catback

[@Xdev1lG00D]

These drop in cams really make more torque. That's crazy. Imagine with a type s oil pump

[@MrKylev35]

The type-s pump wouldn't help with power in this case. The graph is dropping off above 7,500rpm. Usually you do the type-s pump to delete the balance shafts in the oil pump to safely rev higher.

[@cartere9981]

@@MrKylev35it frees up rotating mass on the engine it would at least feel more torquey on the road just from the responsiveness, I feel like at least

[@Chambers805]

Makes you wonder how the cams work with rbc or with a turbo and rbc setup. Is it worth getting cams of you're forged rods, pistons and turbo?

[@grassrootscience4461]

For sure. 4piston advertises a steep gain on boosted cars.

[@AiroRad]

Lol 10lbs 330 torque on first pass for me on pump gas, and 25% duty

[@AiroRad]

Their cams work wonders

[@michaelcaddell8520]

​@@AiroRadis that with a return fuel system? Thinking about getting these cams for my boosted 9th.

[@FR11]

Niiiiiiiiiiiiick

[@brandonjackson9549]

What cams are these, specifically? I don't see anywhere on their website where they note "drop in cams". Link?

[@grassrootscience4461]

Sorry for the massive delay

[@nathanaeleckstein914]

How safe is revving the K24Z7 to 8,000 RPM? With the upgraded oil pump he has. 5:15

[@SleepyFb6]

It should be pretty safe and reliable with the upgraded oil pump

[@justinharris627]

Im wondering with the rbc catless exhaust setup with the rbc in florida at 0 elivation if 220-230 woukd be realistic/possible

[@grassrootscience4461]

Absolutely!

[@kballs94]

I wouldnt be surprised if you surpass that

[@pjpelayox3]

I make 235whp 205tq in my FBO 9th sen si, catless, ported RBC 72mm tb, custom 3in intake, cnt downpipe, invidia n1 3in catback, 750cc gram injectors, stage 1 clutch with 10lb flywheel. Tuned on 92 pump gas.

[@justinharris627]

@pjpelayox3 that's sick were you live and imagine if you did e85

[@pjpelayox3]

@@justinharris627 I live in Seattle and my tuner said gains from e85 would be negligible for what I have done. I wouldn’t really see any major gains maybe 5hp max switching to e85. I’m in the process of doing the k20z3 headswap.

[@ericksanchez9518]

I want to see how reliable this setup is for those of us out there who daily our 9th Gen Si’s. What are the cons to upgrading the cams? I’m looking at getting stage 2 skunk2 cams with the upgraded valve springs put in but don’t want to ruin my daily. (Does it affect long term reliability?)

[@grassrootscience4461]

Well, I'm over 6 months into daily driving and tracking the car. No issues at all

[@TheBb6prelude]

Cams don't or never have made Hondas any less reliable than stock. My F20b has been running pro2 cams since 2008 and it's still running.

[@christianportillo14]

@@grassrootscience4461 are you going RBC soon ? would love to see that comparison

[@punkrockmaniac21]

What are your thought about swapping an RRC on these cars compared to an RBC? Have one laying around and I’m wondering if it’s worth swapping

[@blaketaylor6166]

Rrc is better then rbc

[@grassrootscience4461]

I would say do it! Should have great gains and if you can port it even better.

[@punkrockmaniac21]

Im very tempted! i know the rrc is better than the rbc but what im trying to figure out if with the rrc installed will it have the torque loss as the rbc. I would want to do the rrc with these 4p cams @@grassrootscience4461

[@enriquemendez6248]

Where can I get a full race dp? I got the exhaust need the twin pair

[@grassrootscience4461]

I bought it direct from full race

[@littleredsport5806]

Hopefully owner gets rid of the plastic intake manifold and swaps to the rbc. My powerband did the same where it just dies in the top end. Swapped to the rbc and retuned and car kept making power to redline

[@grassrootscience4461]

stay tuned😉

[@kayden.k20]

How come theres no videos on a fbo stage 2 cams on a k24z7 is it not worth it?

[@grassrootscience4461]

I'm not sure. I didn't do them because they involved replacing valve springs (and I believe valves) at minimum, and it's not worth it for my racing series.

[@lcq4blackstar]

Was the Manifold at least port matched to the OEM 70mm Ridgeline TB??

[@grassrootscience4461]

Nope. The intake inlet design doesn’t really allow for porting

[@lcq4blackstar]

@@grassrootscience4461 so basically pointless and actually causing turbulence/loss of power because of that TB? 😂 I assume the RBC can at least be port matched for that TB?

[@grassrootscience4461]

@@lcq4blackstar lol yeah for sure lost power. You got me.

[@lcq4blackstar]

@@grassrootscience4461 ??

[@grassrootscience4461]

@@lcq4blackstar turbulence is not as bad as everyone makes it out to be. Back in the 90’s-2000’s oe had butterfly valves in there intake to change the volume of the intake manifold and to introduce turbulence. The down side to it is the top end of the engine suffers and outright peak numbers are just not there. In theory, if I was able to port match this the power band would move up a few 100rpm and I would make an extra 3hp but would lose about the same in torque and the low end would not look the same.

[@loganstrid8724]

I can't find a straight answer on this in any of the forums, can I use z7 cams in the z3? Like aftermarket or even stock cams

[@grassrootscience4461]

k24z3 or k20z3?

[@loganstrid8724]

@@grassrootscience4461 k24z3

[@SBBUK]

@@loganstrid8724 as far as I can understand it, the engines are basically the same other than some parts externally got moved around due to the different cars they are installed in. The internals are all the same.

[@zxcvqwer6649]

i have a k24z2 AT accord，can i do DIC?

[@grassrootscience4461]

I would email 4 Piston but I don't see why not!

[@tiffanyhonka2351]

Can u do a online tune for me.

[@Huncho.Jon.]

How do they idle? Any chop/lope

[@grassrootscience4461]

Idles like stock. I do have a bit of vibration but I think it is from the upgraded oil pump

[@SBBUK]

Surely the throttle body upgrade is pointless as the inlet for the plastic manifold is only 64.5mm anyway? Unless this was bored out somehow?

[@chrisb15679]

Throttleboy adapter goes from 70mm to 64.5mm

[@JohnDoe-mm6xg]

I watched your Honda fit k swap video you tunes, what’s up with that car and the fbo si and the huge dip in power at the crossover on both cars? You sure you know how to tune?

[@jackhofalot6705]

all those mods, with the cams and a k24 and it makes less HP than a FBO k20 with stock cams?? Why do I feel like this car should be in the 230+ ? Also, why run a 70mm throttle body and that big intake but use the stock z7 intake manifold that defeats the purpose of those other parts? My k20 with just bolt ons, 3.5" CAI, 3" exhaust, stock injectors, stock tb, makes the same power as this minus the torque?

[@CL9k24a3]

Rushing with tune before all parts are on. Did that couple of times my self. Without intake manifold all this mods are pointless. And I don't understand why would someone go for 4p dic vs dc dic as dc dic is proven and so far I haven't seen any good power curve with 4p dic.

[@thecloud1432]

Drag cartel does not offer cams for the Z7.

[@enhancedphysique6452]

230 on k24z7 which I own FBO is MAX 215 where k20a FBO 230-240 or higher.

[@grassrootscience4461]

I race in an organization where I have to pick my mods wisely. Also when it comes to road racing the power band is more important than the peak number

[@enhancedphysique6452]

@@grassrootscience4461 yes that's true. It's all if you got a good motor. Nick just did a FBO k24z7 FBO no cam 215 hp. Didn't look at the power band though

[@robcarey4278]

Please remember the cat with a converter was still left on the car. If the cat was gone, it would Make higher numbers.

[@anthonychacon6049]

Ported 4 piston head. These drop in cams. Ported Rbc intake with matched up throttle body. 1000cc injectors. Catless. E85. Whos gonna do it?? Lol 😂😂😂

[@Without_Limit_Auto]

How much are they better than TSX 08 cams?

[@CL9k24a3]

Why do you even put 08 tsx cams into context ? Regular dc dic are pulling 20-25hp on top of them

[@tuningbynick]

This is a K24Z engine, it is a very engine compared to the K24A - K24A / TSX Cams are not applicable in this engine application

[@CL9k24a3]

​@@tuningbynick by the factory spec I would suspect that it performs similar to k24z3 cam. And it is really strange that people in US and Canada don't use k24z3 cam in k24a2 builds.

[@Without_Limit_Auto]

@@CL9k24a3 we don't have such engines in Europe or they are very unpopular

[@CL9k24a3]

​@@Without_Limit_Auto with google serch it say that k24z7 is identical to k24z3 (cu2)engine. Only difference is block casting. With simple google you will see what difference is between 08 tsx cam and cu2 cam. Cu2 cam is superior because you gain 5-7hp on low cam over tsx cam and because of that everyone in EU is using cu2 intake cam in k24a3 engines (over the 08 tsx cam) .

[@Hello_its_me_mario]

Stickers add 20hp

[@grassrootscience4461]

Every little bit counts

[@Darylrb1983]

Well damn, these cams wouldnhelp my heavy 2g tsx auto move along much better. Or some boost lol

[@Douche17]

For the price of those cams, shoulda did a headswap instead

[@grassrootscience4461]

I race in a organization where a head swap wouldn’t make sense.

[@chrisb15679]

Nah, my k24z3 tsx auto put down 220whp @7800 rpm fbo on stock cams, but made 170wtq, this setup with a better intake manifold will def put close to 250whp and def get over 200wtq, thats impressive without having to swap heads and changing out header and all that crap. Ported stock head would be nuts.

[@codyoyenikdoctorbluntek6480]

Dyno it without the cat it needs to breath

[@grassrootscience4461]

The cat is a gesi cat rated to not restrict until about 500hp. I might do a comparison one day but shouldn't make much of a difference.

[@justinharris627]

Damn very disappointed epesically for the 1500 bucks. Guess im gonna gave to experiment with the bigger cams cus thats poo

[@CL9k24a3]

There is article on motortrend where Nick has tuned k swap civic with stock k24a2 08 and than swap dc dic in it and gain was 15ish hp on low cam and 20-25hp on hi cam. You can google it out.

[@grassrootscience4461]

There are stage 2 cams as well. Just requires head work.

[@chrisb15679]

Stock intake manifold is the choke point on this setup, once it breaths I wont be surprised to see more power everywhere in the powerband.

[@jackhofalot6705]

at 5500 rpm that k24 you tuned on stock cams loses power all the way until redline...some people should just not mod their cars. with a power band like that imagine your car is slower as it speeds up. those graphs and just hideous, and honestly, just shows lack of quality work.. huge dips when vtec hits, does not make any sense.

[@CL9k24a3]

It is not Nicks fault. He tunes what people bring to him. Here we can see complete missmatch of parts and it shows on the graph.

[@MrMike8300]

I think the main issue is the 9th Gen SI K24 variant itself which is designed for lots of midrange with the plastic intake manifold and the single port exhaust manifold. If these mods where on a TSX K24 it would be 240 easily.

[@MyBrothersKeeper101]

​@@CL9k24a3 as the tuner you have the ability to get in there and change the fuel mapping, timing cam phasing excetra. It's literally his doing

[@slowka]

​@AllThingsVtec thats incorrect, the tuner can only tune what is in front of him.I would like to see what happens with an actual FBO 9thgen with these cams.

[@MyBrothersKeeper101]

@@slowka You're going to need hondata if you're running cams and getting tuned on a Dyno. Hondata definitely let's you get in and mess with fuel and timing and cam phasing. This isn't a guess. By tuning the car by definition you are messing with those exact parameters of the engine. It is precisely what tuning an engine is. How can you possibly get that wrong??? How exactly do you think dyno tuning an engine is done???

[@uchiha_d1334]

214? 😭.