ISR Intake Manifold Review/Instructions for RB25 and RB20

[@yzfr1nate]

Amazing video. Finally someone showing information instead of there face in 90 percent of the video

[@BMcGuinness]

Thanks man! I couldn't find any info on the manifold and not a single real review anywhere so I wanted to help out

[@lawten3141]

Broooooo I’ve been looking for some type of instructions for a fat minute thanks for clearing a few things up ❤️

[@BMcGuinness]

So welcome dude! I couldn't find any info either

[@dennisdespres8484]

yea but u skipped info on the idle control delete wireing info please give that info please

[@andrewcastro5054]

good shit man!!! been looking for a video like this lol

[@BMcGuinness]

Thanks haha, if you can't find it then you gotta make it sometimes

[@RocketRaspeed]

The mystery bracket is for mounting the coolant manifold thing

[@theprojectchannel5045]

Helpful video great job

[@BMcGuinness]

Thank you

[@theprojectchannel5045]

B-Roll CT thank you for a video that actually helps

[@ryanheywood5453]

that bracket is for the water neck if u look there is a little hold on the water neck ait just bolts to your maifold

[@daniell4227]

This, this is what we need

[@BMcGuinness]

I figured the world might need this

[@truckanddog5331]

Hey mate that bracket that you didn't know where it went bolts to the front of the manifold and the single hole on the bracket goes to the water pipe outlet that the 4 hoses connects to,you will see it has a little threaded hole,it stops the hoses from moving around

[@BMcGuinness]

Yes actually i noticed what it was after I got the engine running again lol Definitely useful

[@zacharyagy4314]

Thank you for putting polyphia into this video hahaha

[@BMcGuinness]

Glad you like their stuff too lol

[@SilverLightningXV]

I can't seem to find anything but do the RB20DET and RB20E share the same intake ports? I'm aware they're both RB20s but I have my suspicions and wouldn't want to start investing in parts before knowing entirely what I'm getting into

[@BMcGuinness]

I would bet 100% that they're the same head and the exact same bolt patterns. As long as they're both DOHC. You could test that by trying to order an intake manifold gasket and returning it if it doesn't fit.

[@Doitlike_JC]

Another question, how did you run your coolant lines? I know one line goes to the block but what about the line that goes into the stock manifold? Where did you tap into?

[@BMcGuinness]

So I have an oil relocation kit and that eliminated some coolant lines so basically I just have one coolant line going to the firewall and the other that comes out of the firewall leads to one of the ports already on the engine. If you'd like, check out my Instagram I have a billion pics of the setup @00fcuk

[@Doitlike_JC]

B McGuinness Okay I see now, so just the heater core lines and what about the turbo coolant lines? I know the fees is from the block but where do you put the turbo coolant return? I’ll definitely check out your Instagram thanks 👍

[@BMcGuinness]

@@Doitlike_JC Yep you got it. So I'm actually not using any turbo coolant lines but if I rebuild anything else I probably will install some. There's a port on the intake side of the block for feed in and a port under the exhaust manifold for feed out, it's the drain technically. Awesome 👍

[@Doitlike_JC]

B McGuinness Gotcha! Thanks for your help and keep up the great content!

[@gatecitywake]

what did you do for the throttle cable? the one I had in the car originally doesn't reach, i got an S14 cable (supposed to be longer) but from the L bracket the cable doesnt go far enough to actually connect to the throttle body... im at a loss, it looks like our l bracket to throttle body spacing is the same...

[@BMcGuinness]

In right hand drive a 92 Maxima cable fits right up perfectly that's what I'm using. If left hand drive 300zx has tons of length apparently. Some websites do list the actual length of their cable

[@addisoncorley2244]

Perfect vid! Thanks man

[@BMcGuinness]

Welcome! I'm glad it's helping out

[@Liam_RBZ]

Just purchased an RB25 for my Datsun and looked at these intakes! Do you have any images of it all installed? The angled bracket is to hold the water line collector with the temp sensor in (if that's what you want to call it) it should bolt on near the throttle body. I haven't received my motor yet, but do you have any pics of it all installed? I'm guessing the old OEM intake had a radiator hose connection cast into it and the top hose now just goes onto that collector instead? Thanks for the review! Appreciate it.

[@BMcGuinness]

I'm glad you liked the review! All the water lines on the rb can basically be re-done. I only ran the 2 main lines into the firewall for heat and the 2 main lines to the radiator. The adapter that comes with the kit actually comes with 2 ports for the coolant temp in it which are the same oem thread. But yeah if you'd like to see more in depth pictures check out my page @ 00fcuk on Instagram.

[@oldmeadowsorganics409]

How did you manage to install this with thr master cylinder in the way? Did you remove the guide bolts?

[@BMcGuinness]

Actually I very carefully installed the engine with the manifold on but still managed to scratch up the manifold pretty good. Luckily I didn't bend a line

[@BMcGuinness]

Sorry everyone, never got notified about any comments until now

[@SEALmg]

Thank you for this video. I'm from Germany and am building the same intake manifold on my RB25DET. However, one question remains for me: where do I have to connect the connections shown in 2:04 ? I would be very grateful for a short explanation!

[@BMcGuinness]

Thanks I'm glad it's useful! Those are the vacuum connections for everything on the motor, for everything. Mine is hooked up for brake booster, fuel pressure regulator, ecu, and turbo wastegate. You can use a tee on the less sensitive lines like wastegate and brake booster if you need extra sources 👍🏼 Good luck with the build!

[@BMcGuinness]

5:38

[@Doitlike_JC]

How did you end up routing the IACV? One to the cold pipe or the other to the manifold? Great work btw big help!!

[@BMcGuinness]

Thanks! So there are a couple types of the IACV's but they work the same. I blocked off the small port and routed the large end to the intake piping BEFORE throttle body. This will let the car get air for idle and engine loads when the throttle is closed

[@chrisbelt2521]

Man I can't seem to find those short injector wires you used. Is there anyway you could link them. Thanks. And that plenum is the same I'm rocking!

[@BMcGuinness]

Nice! They're good manifolds for the most part. The injector adapters are from wiringspecialties.com and they do a great job with everything. Most injectors happen to be ev14 connection like these

[@chinoworld2414]

Does this require a tune ? After installing or can it work with my stock ecu

[@BMcGuinness]

I actually don't think I've seen anyone run these on stock ecu but I'd like to see what it does. Any airflow change or especially injectors like new top feeds will definitely need tuning

[@c34laurel]

Nice video. Thanks

[@ryanbissessar1226]

Best video

[@BMcGuinness]

Much appreciated 🙏

[@user-xn2lg4yy9c]

What is the difference between the intake manifold of the RB25 and RB20 engine? Can I install the intake manifold RB25 to RB20

[@whathecheese]

Great vid man!!!...im looking at buyin the sharp custom performance one...is there any difference with these cuz they all look the same (isr, sc performance, otaku) and how reliable u think they are...how much power/psi u think i can get before running into problems??

[@BMcGuinness]

Hey thanks! Nice I haven't heard of sharp but I've seen these manifolds with all sorts of logos including blank. The hardware is the only difference and not by much. As far as reliability goes, I don't have any issues or leaks besides the fact that it's light aluminum so you should seal all the water ports well

[@BMcGuinness]

The psi shouldn't be an issue at all because it's all sturdy but typically on stock internals 18psi rb20 and the same on rb25 to make sure you don't break the pistons or rods

[@whathecheese]

The reason i asked on the psi was that im planning on buildin my engine and goin up in power but thanks again cuz vids like these really help when its easy to find reviews on the big name brands....keep it up bro

[@BMcGuinness]

@@whathecheese Thanks man, you'll definitely be able to get good power with most manifolds that don't have sharp and confusing curves. Yeah I had to make a review because I blindly bought it

[@user-xn2lg4yy9c]

What difference will I face when changing the intake manifold from the 20 to the 25 engine?

[@PavlosJdm]

Hello there great build!!how is this manifold holding up?any issues?what gasket did you use to match in with the head?horsepower response?if you could give us an extra info after a year owning it would be great thanks in advance!!!

[@BMcGuinness]

Hey sorry for the late response! Didn't realize this had so many comments. I used an oem gasket with ARP studs and making 500whp currently on 20 psi. Most of the power after the manifold depends on head flow

[@PavlosJdm]

@@BMcGuinness no prob mate really nice of you to answer is there any possibility to give us a dyno paper?i was arguing with a friend about torque and response lost in the low-mid range keep it up thanks!!!

[@BMcGuinness]

@@PavlosJdm Any time! I don't have the sheet but I put vct in recently and 1000cc injectors to make sure I didn't run out of fuel. Before vct and with 550cc injectors I could only safely do 320. Also with an adjustable Tomei cam gear on exhaust and Tomei 256 cams while putting in vct

[@BMcGuinness]

@@PavlosJdm The rb's don't have much response lower down due to valve overlap occurring in the higher rpm's

[@kcobabe]

You could have just copied the instructions for the Greddy or Plasmaman intake. This is just a direct copy minus the greddy npt area.

[@gwg240]

Nice review! Were you comparing this manifold to the sharp custom performance intake manifold as well? They look almost identical, I'm still trying to figure out if it's worth the fewer extra bucks

[@BMcGuinness]

Thank you! I have a couple friends that got manifolds identical to this one and we really believe they're all made in the same spot, probably in China. The only difference is some of the hardware materials

[@luisochoa5664]

Would you happen to know the exact thread pitch sizes on the manifold? i purchased the same and most def. not running those junk fittings

[@BMcGuinness]

I'm not sure what the thread sizes are but I used the oil drain plug and a couple others as references, not sure what they are

[@allpower96]

What injector connectors did you get from wiringspecialties? Tryna find some for my kit. I have the same exact thing and am trying to figure out how to get power to my injectors lmao can you provide a direct link to the connectors on their website?

[@BMcGuinness]

Honestly not entirely sure but they're ev1 injectors now so whatever stock injector plug is to ev1 unless you have them in your new harness already

[@luiscisneros1756]

wat brnd of injectors r those?, nd can i put'em on a stock rb25det?

[@BMcGuinness]

Stock injectors are side mount, plus bigger isn't better on a stock setup because the fuel trims will be off. The ecu is preset to have the Injectors open in milliseconds at a time. Bigger injectors make more fuel go thru in those few milliseconds

[@240sxaddicts7]

rb25 and rb20 have totally different heads btw

[@BMcGuinness]

Didn't know thanks for letting me know

[@240sxaddicts7]

@@BMcGuinness I have a really rare rb25 and just went through the largest headache. the intake systems are different between the 2. exhaust manifolds are the same though. i have an r32 rb25de which is the exception they used the rb20det intake system on it.

[@BMcGuinness]

@@240sxaddicts7 Oh I've heard of those that sounds like a headache but unique to have. Maybe that's a different variation where the head was made with different specs

[@nateolson1005]

Can you source the coolant hoses?! Been trying to find them for a while by them selves.

[@BMcGuinness]

I haven't found anyone with them actually

[@cameronbrett5687]

How does it respond with the 90mm throttle body?

[@BMcGuinness]

It actually does pretty well, can't use a stock ecu with this I don't think but with tuning you can use all the airflow that comes through

[@shutthehellup6666]

Yo what song is playing ? Sounds like intervals or suttin

[@BMcGuinness]

It's Polyphia actually, "Amour"

[@truckanddog5331]

It's the bracket at 3 min 17 sec mark

[@BMcGuinness]

The TPS bracket?

[@montiz333]

So did you get replacement fittings? if so where did you get them from?

[@BMcGuinness]

I got thread taps and used 1/4 and 5/16 fittings from summit racing

[@montiz333]

@@BMcGuinness Nice thanks for the tip, I picked up one used and it was missing the fittings so I might have to get all new ones.

[@BMcGuinness]

@@montiz333 Yeah might as well get new good quality ones anyway

[@Jay.3]

You went over the yellow water temp sensor in the lines but what was the red one in there? Or was that just a plug

[@BMcGuinness]

Oh yeah, I had a red plug in there to test the threads. Both of the ports are the same thread and for coolant temp to dash and any aftermarket one

[@zachcollins6158]

Did you have any issues with the tps ?

[@BMcGuinness]

Actually it worked perfectly

[@SilverLightningXV]

Where’d you buy it?

[@RobFiler]

3LightningBolt I got mine from Enjuku

[@BMcGuinness]

I got it from Enjuku as well

[@karlosgoldee1975]

What size injectors are you running

[@BMcGuinness]

1050cc

[@mattt525]

The music in background is WAY too loud. Thabks gor the vid though man

[@BMcGuinness]

I didn't make my videos as nice back then haha, no problem dude

[@erikmexico11]

Looking for info on the throttle cable? Mine didn’t work :/

[@BMcGuinness]

Oh I managed to use a Maxima cable from 92 and it worked perfectly

[@erikmexico11]

@@BMcGuinness you a real one bro

[@erikmexico11]

Damn, I have an s14 tho:/ you got a skyline

[@BMcGuinness]

@@erikmexico11 Oh damn haha, then it's 300zx!

[@BMcGuinness]

@@erikmexico11 Still left hand drive?

[@ryanmedows6072]

Update?

[@BMcGuinness]

Still working great, drove it yesterday and still holds 500 whp no problem. I have since made stainless coolant lines in another vid (part 2)

[@ryanmedows6072]

I want to get this one. But peope said the throttle body leaks. Or the welds will break. I guess that's not the case.

[@BMcGuinness]

@ryanmedows6072 Never seen that happen with them, if you're running a MAP setup instead of MAF you'll never even notice a leak anyway

[@Supra_Mickey]

Thanks for the video kind of distracting and hard to hear with the music

[@BMcGuinness]

No problem, yeah I've gotten a better setup now to hear my sound design in more recent videos

[@R0yL33]

Beefy flange !

[@SupernaturalPowerz]

It's Niss-an not nee-sahn

[@PlsCallCYFS]

As much as you want to believe that. It’s definitely pronounced “Nee-Sahn” as said by the Japanese themselves

[@SupernaturalPowerz]

@@PlsCallCYFS ha, oh ok. So nissan gets pronounced authentically, but all other foreign words we pronounce with English accents. Ok bro

[@PlsCallCYFS]

@@SupernaturalPowerz are you saying the Japanese are wrong about their own company?

[@SupernaturalPowerz]

@@PlsCallCYFS And they actually say "nee-sung" but go on

[@SupernaturalPowerz]

@@PlsCallCYFS Nihon Sangyo is Nissans original name then it got abriviated to Ni-sang..