I am about to have the machine shop order the cam tomorrow,.. I just wanted suggestions. it is a 355 w/' superam, vortech supercharger, trickflows, intercooled, 7-8lbs boost, 3.45 gears, 700-r4 w/ 2,600 stall now,.. about 8.1-8.5:1 compression. I would like to stay computer freindly, possibly emmisions freindly, but really need to have it work well and be very streetable and make power,.. both track and street, not an everyday car, want it to idle good and everthing. thanks
i was thinking either 225/225@50 500/500 liftw/ 110 lobe sep so it is good on the street, or 226/234 @ 050 500/510 lift with 114 lobe sep,.. not sure which way. but i need recomendations ASAP,.. the machine shop wants me to go with the first chioce.,.... but he is more old school, but says that is better than a 114 lobe sep for the street,.. thanks

 

The first one is not the one with that 110 lsa
If it is a choice between the two go for the second, If possible I would put 1.6 rockers on it and it will be good.
My $.02

 

well, i can get any grind i want. He is calling a cam company to get recomendations from the real techs. I am just guessing on what he will want to give me,.. he was talking a 110 w/ 224/224 and 500 lift.
Many people recommed on this board a 114 w/ 226/234 and 500/510.
I can get anything,. what do you guys think?
these engine builders all recomend the 110 lobe type, but all you guys say 114... so what gives. thanks

 

Go with the 114lsa. Not only will it help the idle (your EFI will love you for it) but, it will also help keep the intake charge out of the exhaust.

If you have the choice, 8.5:1 compression would work abit better w/ that cam. On a 350ish engine expect power to be about 5900-6000rpm.

 

yeah, but wont' cylinder presure be high? I am probably running regular felpro head gaskets. will the 110 not work with the efi?, or can i go 112 which is in the middle? I want to make some lower end street power too, you know in the middle.

 

I run 9.5:1 comp
lsa is 113
afr 195's
8.5 lbs boost
cometic head gaskets
pump gas 23degrees timing, 435RWHP
Your combo is pretty close to what i run

http://www.turbotime.us/gallery/bigtime01

 

nice setup! what is your intake duct made from, I need to make one custom,.. did you make it?
so what are the recomedations on my cam?

 

[QUOTE]Originally posted by Justin 87 GTA
nice setup! what is your intake duct made from, I need to make one custom,.. did you make it?
so what are the recomedations on my cam? [/QUOTE

4" steel tube, ceramic coated
I would use nothing with a 110 and a power adder


http://www.turbotime.us/gallery/bigtime01

 

i got 2 recomendations, 218/224 @050 505/510 w/114lsa and a 224/230 @050 477/480 w/ 114 LSA. one of them is from the cam company,. the other from a brd member,.. which one do you think is better. -Justin

 

I like the second one better but would like to see some more lift.

 

That second one was basically what I was running when I had my vortech setup...except mine was .500 .510 The lift was fine for my setup but I was using ported stock heads....Might be worthwhile to get a printout for flow on your heads...Based on that you may/may not want more lift...

As a matter of fact I think I tried to sell you my cam when I switched to solid roller....LOL...

 

Cylinder pressure drives the piston down the bore, which turns the cranks and creates torque. Less pressure = less torque (& HP). If you want to lower your cylinder pressure, run lower boost, or put on a restrictive exhaust, heads, or small cam. I wouldn't be worrying about too much cylinder pressure with a supercharger... With turbo's on the other hand, and nitrous, you can get too much of a charge in the cylinder at low rpms (in otherwords, too efficient), and start breaking parts. It's only in the turbo case that'd I'd pick a cam to minimize cylinder pressure down low (by having a ton of overlap, sending much of the intake fuel/air charge right through the cylinder at low rpms)... With a centrifugal supercharger, you just don't see the boost down low to need to worry about it... I think you'll like the 2nd cam much better.

Andris

 

and the lift on the second cam is ok,? I am ordering it today. that's what comp cams suggested for my setup,.. i could always increase it with 1.6 rr's right? my heads are trick flow 2.02's w/ 66 cc. i guess they flow pretty well right? so I guess i'll get this cam: 224/230 @050 477/480 114 lsa. any objections or suggestions? thansk a lot!

 

http://www.turbotime.us/gallery/bigtime01

 

From past experience with comp they will ALWAYS lay very conservative when suggesting a cam..... So take their advice with a grain of salt...

As far as head flow numbers most companies will have a graph showing CFM @ a given Lift... You can use that to determine at what point increasing the lift essentially becomes useless... and shows how the head is flowing at a given lift..As you said you can always add 1.6 rockers later to increase the lift...

Butas said above comp typically is not going to give you the perfect cam....They are going to stay conservative because if they recommend too big then you would obviously complain or possible damage something...

Like I said mine ran fine with a .500 .510 comp cam....Id hardly say it was holding me back all that much....It was a HUGE improvement over the stock cam with the same setup....but they way I saw it was with a mild ported stock head there was not much use in going any higher...especially given that I was not using dished pistons.. and was also concerned about Piston to valve clearance given the decked block, milled heads, and flat top pistons...

 

thanks

 

The cam i settled on, is a Lunati custom grind,..
220/230 @.050 460/480lift 114LSA
I think it is in the scope of what we talked about. I ahd my machine shop call his Lunati guy,.. and that's what he recomended. 1st he reccomended a 112 grind, w/ little bit different #'s, but i stuck with the 114 and similar grind to what you gusy recomended. I hope i made the right chioce,.. well, i'lll never really know.. but i'm sure it is close enough to what we talked about that it'll work well,,, maybe even better. Hope you guys don't see any major flaws with the design, but it's too late now. Do you have opinions? thanks -Justin

 

No need for a custom grind.
A Crane HMV278-2 will fit the bill nicely.
Very blower friendly.

specs are 278-290 222-234 @.050 .467"-.494" 114LSA.

1.6 rockers on the intake side will work nicely.

 

well i asked this question a couple of days ago, and although many did reply, i didn't hear from you, until now unfortunately. So either way, who knows which is the best,.. hopefully mine will be good too, maybe great.