Hi, I've got a 81.5mm lsvtec running 16 psi on a holset he351, the turbo flows 62lbs per minute. I'm getting full boost by 4500,pulling hard til revlimit at 8500. Will I lose power alot of low end and midrange power and only make power from 7k and up switching to victor x? I'm gonna up the boost to 20-22 psi once my water meth is running. Type r cams are coming in the future too.

 

no you wont lose much low end and it will pick up midrange and high end with the victor

 

For high boost ditch the stock intake.

 

personally it depends on what you wanna do with it

if its a street car i would keep the stock intake or upgrade to a performer X, type r or a s2 manifold.. personally i think the performer x is a great manifold for the street that doesnt take away any power down low and adds a good amount up top

if its all out drag car id upgrade to the victor x and not worry about anything below vtec

i had a s2 and upgraded to the victor x and lost a good amount of mid range but picked up power up top and it held out further

 

Im running the victor x on my b20v and it definitely pulls hard up top. Used to have the s2 on my ls but its hard to compare on these two motors.

 

My set is a gsr with ls crank, 9.2:1 compression, eagle rods, ctr cams, sc60 with .82 housing and stage 5 wheel.

I used to run a blox which same thing as skunk2 maybe a tiny bit less flow and then switched to victor x. the blox had a little more low end out of boost but the victor picked up midrange and a **** ton of high end power and allowed me to make power up to 9200rpm vs 8400rpm

 

i'm pretty much set on getting it.

 

this is what im debating on also...dont wanna lose any low or mid range switching to a victor x..i wish someone had some dyno charts to compare

 

A dyno will not give you too much info other than WOT. I just switched from an AEBS to a VictorX and it doesn't feel much different below 6k. It feels WAY different above that though! I am pleased with my choice considering what I use my car for (drag). If your only wanting more than 500-600 hp then get the victor IMO.

 

You should be able to make some great numbers on the stock with that size turbo

 

True but will make more with the victor or something else that flows better

 

bump...anyone else?....the victor x looks like it would suck low and mid range lol

 

I have a b20v turbo. I have a skun2. I guess the newest version/gen. i will let you know when i get back from the dyno. Tuner said it will be about a 25%+ better flow over the stock one all across the board and should take me from 375 to 425 pretty easy. (other mods were included in that estimate)

 

Its not just a "dyno" thing. Its the design of the plenum and runners. you WILL lose midrange torque... that's the way it is, bottom line