Hi from Puerto Rico, I'm new here so this will be my first post.
Nice Page BTW!!

I want to know what Intake Manifold will be the better for my setupB20vtec. these are the Specs:

Head:
B16 PR3-1 head Port & Polish & Closed Chambers
Supertech Flat valves
Supertech Dual Sprines & Ti-retainers
Supertech Valves Guides
Skunk2 Pro 2 camshafts
Skunk2 Pro Series Cam Gears Titanium
Aem Fuel Rail & Walbro 255 Pump Gas
440cc Precision Fuel injectors
Big Tube Tri-Y
72mm TB Professional Product
P2R IM gasket & TB gasket

Block
B18b1 & Supertech Blockguard 84x89 bottom
Supertech Pistons 12.5:1 @ 84mm
Eagle Forged Rods
Eagle 3 point Girdle
ACL RACE bearings
ARP bolds & Head Studs
P72 oil pan
Vtec conversion kit
ITR oil pump & GSR water pump

Transmission
1998 ITR B18C Spec-R LSD 4.785 Final Drive
ACT Xtreme Pressure Plate
ACT Street Disk
ACT StreetLite Flywheel 12.5 pounds

so my question is if a Victor X will be fine for this setup, or I should use the Skunk2 IM Pro series that I have.
My tuner told me with the Pro 2 will make peak around the 8k-9k rpms, and the engine could rev until 10k rpm depending on where will be the power peak(the curve). So I read that with the S2 the power after the 8krpm will be fall, and with the VictorX the midrange is lower but at high rpm is better.
So sacrificed the high rpms in a street car? or sacrificed the midrange counting with a good torque(b20) and better top end with a VictorX? or do I need a 92-95 Stroke kit or something like that or just fine with a 89 stroke + Victor X?

Thanks for all your help!
Regards

 

I would honestly test both on your motor and go with whateve your motor likes best. Those would be the two manifolds I would personally tell you to look at.

 

Dont you think the Performer X might be better for a NA street build??

 

yes, that will be the perfect scene, proving both in my setup at the dyno. My friend have the VictorX in his DC2 turbo, so If I dont get an answer here until I put the engine in my HB I will take his IM and test it in my engine, If I do that I will post the charts.

Thanks!

 

yeah, the performer X is an IM for N/A application but is the same as S2, I dont see a big difference between those IM. The plenum and runners of the S2 are bigger if I'm not wrong? I was just thinking about the victorX because the bore/cp/cams combination in my setup. btw Thanks!

my tuner told me that if I dont stroke 95 the bottom of my engine, dont waste money on VictorX...so I don't know

any other inputs?

 

If you want to rev to 9,500, go for the VictorX. If you want a better powerband below 9,000, go with the PerformerX or Skunk2 IM.

 

i second this

 

The Skunk2 and PerformerX are 2 pretty different manifolds from where I am sitting. I was just suggesting that you might look into that instead of the VictorX. You said this is a street car right. To me it doesn't make sense to have a manifold like the VictorX on a NA car that is going to spend it's time on the street. How often are you going to rev the motor up to 9500 on the street??

 

I'm agree with you
for that reason is why I'm in doubt about the VictorX or S2, because this setup will be most of its time on the streets, and sometimes at the track. and at the streets is very important the torque of an engine, because of that I choose the Tri-Y header instead the RMF. but I wont to lose the potential of the cams Pro2......because of that I think about the VictorX....so I dont know.
I think I will need to prove both of the IMs.
Thanks for your opinion.

Also it will be good if any of you have experience with the S2 vs PerformerX

 

I have heard many people rave about the P30 IM for street use.They say it does much better on the low-mid range than aftermarket and ITR IMs. Not sure how true or accurate it is but might be a good idea to check out.

 

obx 52mm itbs

 

You have to remember that one shoe size does not fit all. A P30 intake is good on most b16a's and stock to mild b18c's with a pr3 head but will lose in the topend to a type R style intake manifold. Bolt it on a B20 and you'll find it quickly runs out of breath and kills VTEC. Why? because the RPM range an intake is good for, depends on the displacement (and other factors like compression which is similar to increasing displacement).

So in a nutshell (and this isn't gospel because not every engine is the same) a P30 intake manifold is ideal on most b16's. A performer x is better if not best on most B18c's and a Type R style manifold has been tested here to be well suited to most B20 builds as was the Victor x.

All intakes will work, the question is always "what is best suited to a particular engine"? From there you go with general rules of thumb and then dyno test them and see what the engine likes.

 

So in your opinion do you think a ITR style manifold on a B20V would act like a P30 would on a B16?

 

sounds good, but not the best option for my setup. because is for daily/street use, also tuning those ITB are a little difficult for daily use (in the case of the OBXs at low rpm) why? do to the position of the injectors/throttle. So if I would use ITBs I will use TODA or Jenveys in where the throttle is before the injectors not the case of the Obx.

 

totally agree.
My engine is a aggressive build one, the only think that less is a stroker/kit 92-95, and I want to use the 89 b18/b20 that my block have with 3-point girdle. because of that I'm in doubt about the S2, because I know and saw excellent results in mild build engine or aggressive build but with components ITR,CTR or aftermarket but not to much far of the limits of those components, I'm running Pro2, not tuners, so I'm thinking if I use S2 I will cut the air at the 8,000rpm...

I will try to talk to my tuner and see what he said to me. I will post that later.

 

Not exactly but it would be a better choice for a daily driven mild performance version of a B20 VTEC.

 

I talk to my tuner and he told me that the S2 will be better than the victor in my engine because of my 89 stroke, he show me an ITR intake and show me my S2 and he told me that the S2 is an improve version of the ITR, and yes is true I saw it. The more longer the runners more power(S2) in the case of the victor I need a 95 stroke and customs cams because of the shorter runners and etc etc....
Also we have a dc2 with a Victor so we will compare the 2 IM for the doubts. I will post the results later.
THANKS to all of you.

 

update?

 

X2

 

well, I'm building the engine at this moment, as soon I put the tires at the dyno I will let you know the results!

 

skunk2 has nice allmotor setup PRO series manifold n comes wit holes underneath to tap for a direct port nitrous!! good power numbers n good price i had bout a close set up as yours

jus only diff i had the 95mm stroker kit from eagle
82mm bore gsr n gsr head wit bbk big manifold
400cc precision inj. hondata s300 only thing too much
fuel n not a good map n washed off the rings!!

wat part from PR u from im from comerio but stay in South Carolina

 

the performerX is a great manifold.. i am running the perfX with my engine its 84x95mm and im running pro2's.

engine made 287hp at 8400 with the performerX midrange power was great..

i would suggest trying the perfX vs the S2 manifold.. i think the perfX is better for street..

 

wow thats loads power

 

would the perx and s2 be good for lsvtec with 9k redline and also for dd

 

nice!

I'm from Cabo Rojo.

well I will going with the S2 so despues te aviso como salio!!