Well trying to recommend best intake manifold for lsv setup for a friend.He was trying to decide between,Skunk2 or Edelbrock Victor x.But after researching alot of people say Victor x on allmotor setup is overkill.His setup is Gsr head,Stock port,tuner stg2s or pro 2s,81.5 ctr pistons,Ls crank.Also would it be better to use pro2s or tuners with the compression?

 

go with the performer x. typically gives better numbers all over the graph in these types of builds compared to the skunk.

 

i would use the edelbrock performer x its better bbecause the runners are longer and still has a nice plenum . cams i would go with skunk 2 pro3s at least pro 2 .on the performer x if you asre using 68MM TB MAKE SURE YOU OPEN THE MANIFOLD TO A 68 BECAUSE STOCK ITS A 65MM

 

That motor is nowhere near big enough to even sniff pro 3's boxes.

OP I would take a step back and consider a different piston choice. You do realize what the compression ratio and clearances are going to be right? Good luck running a big cam w/o P2V issues.
Take a gander at some PR3's or P30's and stick with the Pro 2's. They will eat up the tuner 2's everywhere. The Performer X will be a nice addition over the S2 manifold. My only concern is the stock ported head...that may be your biggest drawback with a setup like this.

 

Funny that you say pro3s are to big for the motor because I had a 81.5 lsvtec with Molly 12.5 pistons scat rod b16 head super tech valve train and skunk pro3s with a performer x manifold car made 221hp and 151tq so thank you my friend the cam is not to big

 

^^ Uhh, yea it is...

 

How do you figure it's to big or the motor , explain your theory . Because I just told you what my car made on it and the car ran 11.86 @113.56 mph at 1956 if it didn't work I doubt the car would make that power or go that fast

 

Because you have a built block with valvetrain and the OP has a stock block. And stock head. He said his homie has either pro 2 or tuner 2's. So I'm guessing that means he has a stock head and he wants to buy some cams, either the pro2s or tuner2s

 

You are comparing apples to oranges. And I bet pro 2's on that setup would have performed MUCH better. It would have made more USABLE power and peaked sooner keeping you in the thick of your powerband with shifts. Pro 3's are BIG. There is a reason skunk2 reccomends 2:++ and 12:1+ to be in an effective area in terms of builds. They also reccomend a ported head to "optimize" the performace of such large cams.

Numbers are numbers and you can spout them out all you want. Without proof it never happened...

 

1.ctr pistons are not stock in a ls bottom
2. He said stock port head .

 

Powerband was good and it peaked at a great rpm , how about you try it instead of just reading everything you see my friend
And I have proof of power video from the track and everything

 

^^This, a lot of members need to stop passing on what they've READ if they haven't personally tried/done it.

To answer the OP questions, go with the Performer X for IM and Pro2s would be fine for cams. They seem to work alright

 

 

Yes a lot of people do that , pro 2s would be great I just did pro 3s just to try it and it worked

 

Yea well,I wasnt talking about the Performer x,I was talking about the victor X.They have the shorter runners.Alot of people say they are better for boost.But I was considering with the compression it would be fine.As fair as for the cams.I have used pro1s in b20v before and idle and everything was fine and not as nasty.But when I used pro2s in poorman R the idle was rough.Car made 217 but it had skunk2.

 

I have both for sale, Performer X portmatched and a set of pro2's with less than 1500 miles on em. Going turbo dont need either. -Greg

 

when i put even larger cams in on a silly low compression bottom end i made more power everywhere.. i dont really believe in this " you need super high compression and 2+L of displacement to run this cam" I mean sure it helps to have more displacement and even more compression, nobody is going to dispute this, but if the engine is built right and tuned right and using the correct gas (perhaps he could look into E85, mixing etc..) then i believe the OP could make Pro3s work nicely... ALLM0T0R and i have talked about this alot in the past..

 

i would go with the skunk2 im. ive had a couple buddies who have played around with both and there is a small difference

 

I personally have never owned Pro 3's but my buddy had them in his LSV w/ P30's and it was disappointing. He switched to pro 2's and the motor responded MUCH better. The powerband was much broader and not as peaky. Yes it made a few less HP up top bud the mids were much more linear and consistent. That is where I made my statement from. Not just reading and spreading useless info.

 

i think that area under the curve is all to commonly put aside to peak hp. the faster car will be the one with more average hp in the working rpm range, all other things being equal. im dealing with this in my turbo car currently. i had the larger .82 exhaust housing on and the powerband was not the best, peak hp made right at redline. i swapped back the .63 smaller housing and now i have many more rpm of peak hp.

just because pro3's made more peak hp to brag about online, it doesnt mean it would be faster, and a smaller cam could very well produce a better powerband

 

Amen..

 

Are because bigger is not always better.

 

Everyone always recommends a px over itr/sk2 for a 1.8L however I had a friend switch from a sk2 to a px on a stout 1.8L setup and I think he said he lost power under the curve and made like 2 hp up top or he made like 2 under the curve and lost a decent amount up top. I forget this was awhile ago, but I know he put the sk2 back on.

 

you have pm sir.

 

Interesting, I'm putting my GSR Manifold back on the get the 10whp back in the mid range.
The Performer X didn't beat the my old GSR manifold until above 6000rpm. My redline is at 8700rpm. So the increase was only for 2700rpm.
The new custom GSR manifold that is going on the car is targeted to keep the top end gains from the Px and get the mid range back. Maybe even more, I hope.