Recently picked up a b20 block with
Arias Flat pistons
Eagle Rods
Head-
GSR p72
Supertech Vtrain
JUN3 cams
VictorX Mani
OMNI Power 70mm TB


Spoke to the tech at Arias and they told me compression would be around 11.2:1 with this setup and Im wondering if it's enough to make around the 215ish WHP range like this.

Where do you guys think my power levels will be?

 

I would use an ITR style intake manifold instead of the victor x but you should be able to reach your power goal or more as is.

 

I wouldnt unless the itr manifold is cnc ported like the one in that test otherwise the victor-x is a great choice.

 

more then enough my boy made 230hp ON PUMP GAS with the rs machine type r replica pistons which are around 11:5:1 Im guessing here but i know its 11:& higher compression

 

Even unported it will still outperform that victor x on that build. I am so sure about that, I'd put money on it

 

itr > victor x below 7k ish

 

probably right....ive never tested a stock itr manifold...the only itr manifold i have is the cnc ported one they used in the tests but i still run the ported victor-x i have

 

its crazy how before the infamous "test" the victor X was the manifold to get and now its the "Cnc ported" Type R/b16 thats all the rage. Even if that CnC port is a good 5+ years old.

 

"True" ported out victorX with port matched everything will out perform alot of manifolds.. i'm just saying..

i have one btw.

Compression ratio is 1/10th the equation for power making.. Build your setup about your head / cam setup..

i'd personally run a double layer HG and get it to around 11.5 Thats a overall good around compression for almost all cams..and head setups.

 

Yes my victor-x is ported and port matched to the head....so was the cnc ported itr manifold. from about 7k and up the victor-x just ****in kills the itr manifold. im around 13.2-13.5 c/r with a head that loves to flow. motor sounds like raped ape from 7-10k

 

Thanks guys! Would love the ported ITR mani, but remember, p72 GSR head here!

 

The Skunk manifolds are ITR style, so you can use one of those for a GSR head on your build. From my experience, a ported ITR intake manifold only made roughly 4-5 whp over an unported one on a B18c, so there wasn't a lot of difference. The difference "could" be greater on a larger displacement motor like a 2L and if a good CNC program was used for the porting. Even on most 2L builds that I have seen, the Victor never performed that well compared to an ITR style intake. Even if it did start to out perform it from 7000rpm and up, unless it's a drag motor, it won't be ideal as a street/strip daily driver.

 

Thanks for all the input guys, but it turns out that I won't even be able to use this setup.

My machine shop guy checked the clearance yesterday and it turns out that it's way too loose. .005" is where it's at. If this was a full race motor, I wouldn't mind too much, but it will be going into my DD.

So for now, I'll be throwing in a stock LS block with the GSR head mentioned above just so I can get around.

Will need to overbore and get a new set of pistons. Any suggestions? Low compression+boost or high compression+nitrous?!

Oh the possibilities

 

big difference in power, what is you goal?

 

we ported our own ITR intake manifold and ran it on our test car(84x89) we ran the shop ported ITR, AIR, and victor X, the results were pretty much what I expected

AIR>ported ITR>victor X

this was on an 11.4ish motor. the Victor X was ported so Im not sure if that had anything to do with it, next time we test we want to log a couple more parameters and see what we come up with.

 

Not really sure on power, I REALLY want to get into the 10s. One of my buddies went 10.9@135(good for 10.5s?) and the other went 10.8(not sure on MPH) both with sleeved 2.0L, GT30Rs, VictorX, on 91pump! Oh yeah, these are DAILY driven cars as well.

I will have to bore to 85.5mm and I think the block is sleeved by RS machine. Even then, i think I may be risking it by boosting. What do you guys think?

If so, I'll probably build a 12:1 compression motor and run a nice shot of spray. Any suggestions as to what kinda nitrous setup? I have NEVER sprayed nor have I ever seen a nitrous setup in person, so I have no idea as to how to set these things up. Been doing a ton of research, but Im more of a hands-on guy. But I was thinking of doing just a mild wet 100shot single fogger.

 

If you want to get into the 10's I think boost is your only real sensible option. Nitrous is good but a lot more tempermental due to constantly changing bottle pressures. It's hard to get the jetting and everything correct for each run at a track, let a lone run 10's.

 

Do you think that boring the block to 85.5mm is too risky to run boost?

 

yes 85mm is very frowned upon, not to mention 85.5 just not enough gasket material between the sleeves anymore

 

what about for all-motor?

 

i know we are doing an 85 for a guy locally just havent much seen 85.5, i honestly cant answer that one my friend. If you need a resleeve, depending on the manufacturer they usually charge ahuge amount less, i think GE charges like 3 or 4 hundred fora resleeve

 

x10000000000 soooooooo many people have the misconception of compression. they seem to think you need outrageous compression numbers to make good power. high compression is really only to compensate for the lost of compression due to overlap of big cams. you should choose compression with your cams and head work.

 

Compression is used to compensate for lack of displacement. Displacement moves air which is great for big cams, if you don't have it, compression will help compensate for it.

 

isnt that pretty much what i said lol ok both compression on a smaller displacement motor and larger displacement makes up for the lost of moving air due to overlap of big cams basically you want to move the right amount of air into and out of the combustion chambers

 

remember this guy's motor has has RS machine sleeves that are thick and beefy. I don't think 85.5 would be an issue but of course his machine shop would be the one to make that final decision.