This winter I'm changing out some stuff.
I don't want to change the Skunk2 IM unless it makes sense too.

New setup will be:
sleeved 82x89
GSR head
12cr
e85
GSC cams
GT35 turbo
Full ram

Looking for 500-550whp
reving to 8500-8600rpms
20-24psi


I'm okay with making a little less TOPENDwhp (8200-8500rpm) in return for more overall hp/tq from 3500-8000rpms.


Do I need to upgrade my skunk2 IM?
What are the KEY factors which determin if you need the Victor X or not?
certain cam for 8500rpms?
general turbo size +61lbs permin
over 20psi?

 

I think a VictorX will help alot to open up the top end. The midrange doesnt suffer as much as you think. Probably wouldnt notice it in a big built turbo car, especially with those cams.

 

The skunk2 will have more midrange and torque due to its longer runners. The edelbrock has much shorter runners which means less midrange and torque with an emphasis on topend power.

I would recommend gasket matching the head flange of the skunk2 and cleaning up the casting on the runners. Also run around a 70mm tb and port the skunk2 as such.

I think you'll enjoy the powerband of the skunk2 on the street a lot more than you would the peaky (in relation to the skunk2) powerband of the victor x.

Just my .02 cents

 

test them both i would like to see a comparison between the two with that set-up/power.

if midrange is your goal i would assume the S2 would be the better choice and since you only plan to take it to 8.5/6... I feel the victorx would be good for a high revving motor 9-10k to really take advantage of what the manifold is made for. but who knows, maybe the short vs long runners wont really sac that much midrange.

 

... when you dont want your torque graph to look like a rollercoaster.
I dont think turbo Hondas need any help in the mid range department.
Thats where peak boost and peak torque always occur.
But thats just my opinion.

 

Well for a the displacement the midrange is ok. It never hurts to make more torque :p

But I feel given his motor, turbo size and projected rpm limit that the skunk2 would be a better fit, since like mugen said, the victor x really benefits a motor that runs higher rpm.


If you do what I suggested to the manifold I think you'll like it. If you want to get a little more out of the s2, uou can cut the top of the plenum off and have someone do a mild port and polish all of the casting flaws out of it (the last part really helps a bit)

 

I think the larger plenum is an added benefit in boosted apps.

 

I have a victor -x on my set-up and i love it,, peak torque at 6200rpm (320) and peak whp at 6800 rpm,,, so some tell me that im losing midrange but high end is good for a b18b

 

The larger plenum definitely helps in high hp applications, I would call 500hp kind of the tipping point for high/low hp if that makes any sense. But rememberrememberthat larger plenum will take longer to fill which means slightly more lag which could change the midrange of the powerband significantly.

If someone wants to let me borrow a victor x, when I get my car done I'll do a bsck to back dyno test. Run the skunk 2 and victor x back to back with no tuning changes and them tune for the victor x and have 4 graphs.

Skunk2 tuned
Skunk2 and Victor X (no tuning changes)
Victor X tuned

Could be interesting, especially since my build and power levels would be indicative of the average street duty turbo honda (stock bottom end ls/vtec, head bolt ons, 300-350hp etc)

 

I agree with you Wantboost the lag is significant with this intake( for me im at 12 psi at 5300 rpm full boost at 6000

Curious to see the graph

 

Circa '07
https://honda-tech.com/forums/forced-induction-16/edelbrock-victor-x-versus-skunk2-pro-series-intake-manifold-dyno-test-2137420/

 

Let's swap for a week ill send you mine if you send me yours.
I just switched from a gsr to a victor x port matched the runners and running a 70mm tb port matched also.
I haven't dyno'd the car yet just been cruisng around on 3psi. I can't feel any major diffrences in the midrange going from stock to the x. It actually feels a lot better but I made a lot of changes at the same time so who knows.
I would get the victor x just because it looks super badass..

 

Yes i can easily have my guys port out the runners to fatten them up or cut it open and port it.





yes i've seen that thread, but the IMHO it doesn't really answer my questions & I am unsure if that "conclusion" hold true for 500whp + 20psi larger frame turbo applications.


I'm missing tech info on how the dynamics of a turbo charged honda works... so I'm just "assuming" based off incomplete "thought process".
I want to know under what parameters/condition would the victor X would be more so beneficial.


I'd be glad to test BOTH, i just don't want to re-do my charge piping
Q: Are the TB location the Victor X very very close to the Skunk2?




As more and more guys are easily breaking the 450-500whp applications and still keeping it streetable, I'm sure I won't be the only person facing this question.

Charlie

 

My 460hp dyno on the Tuner 1's made excellent power with the Skunk manifold above 8k



Should/Could have revved it higher

 

Thank you Natural Aspirations....

any boost graph?

 

I'm digging.... This is a graph of the GSC's with boost.

*(This is on wastegate spring only,on a .82ar)

 

The blue line is from the first graph, Boost does increase with RPM as a result of the EBC


For reference this is the dyno graph that matches the boost plot.
The purple line is the GSC's, the blue line is the Tuner1's

 

Honestly at 3psi you couldnt tell the difference between anything lol.

One should never pick a performance part because It looks good

 

^^ lol I know this.
I have my stock exhaust bolted up so back pressure is a s.o.b.
But the motor is still very responsive in and out of boost, can't wait to dyno it on my super retarded t4 slug.

 

 

6262 here with a stock throttle body and Skunk2 Intake and CTR cams. Spooled good and made a nice torque curve. Also made 650whp @ 26psi. Stick with the Skunk2, no need for the VictorX.

 

thanks guys.
I'll update this thread if I do have time to do some back to back manifold testing.

 

I have a 84mm B18c 35r with a Victor X manifold and pro1 cams. I'm looking forward to swapping the intake manifold to skunk2 pro. My car lacks midrange once above 5.5K-6k rpm and beyond it feels great below that its sluggish in my opinion. I would keep what you have.

 

ive noticed that many b series vtecs have a dip or flat spot in the power band somewhere around 6500 give or take a bit, but with the victor x the power really ramps up after that dip like 7000-7500+ where the manifold helps it really jump up in power.

think about your transmission and gearing though. midrange is good but if you are hammering on the throttle toward redline, are you really ever below 6500 or so rpm?

 

With a dedicated race car , probably not but with a street car you spend a lot of time in that rpm range.

The skunk 2 manifold out of the box is a pretty good piece, however if you want slightly more out of the manifold then a good thing to do is gasket match the intake runners, gasket match the throttle body or port it to match your larger throttle body if you have one and have not done so yet. Also you can mildly port and polish the plenum and runners themselves, if you are after the most from the manifold (as the casting is pretty decent from the factory) but it can always use some fine tuning and cleanup work