View Full Version : Big Boost(25+psi) Big Power(900+rwhp) & 400+ci - What Cam?


No Juice
10-01-2007, 01:23 PM
How big of a cam should I go with reach that 1000-1100rwhp mark on a big boosted application. Looking at 25+psi of boost on a carb style intake and cathedral port heads spinning to 7500 or more

Are we talking 240 duration range or 250+ duration?

What about lift? Is it going to help to have a cam with .650+ lift or stick to the .600 to .620 range

Turbo LS1 SS
10-01-2007, 01:38 PM
you really don't need a huge cam at all to make big power on a Poocharger. i would stick in the 230s-low 240's max and right arould .600". it really depends on the drivability and power curve you want out of the car. what trim blower are you going with?

if it were me, and it was a street-strip car, i would go with a mid 230s cam.

phantomLT1
10-01-2007, 01:50 PM
:funny: you really don't need a huge cam at all to make big power on a Poocharger. i would stick in the 230s-low 240's max and right arould .600". it really depends on the drivability and power curve you want out of the car. what trim blower are you going with?

if it were me, and it was a street-strip car, i would go with a mid 230s cam.

:funny: :funny:


LMAO man WTF is a poocharger? Is that a new type of forced induction? I need to check into that . Wonder how much boost I can safely run on one of those poochargers. You don't wanna run to much boost on the poocharger cuz you might blow an o ring and the motor might shit. I know it was a accident but damn thats funny. Laughed for a good 10 minutes.

ls1290
10-01-2007, 02:58 PM
:
LMAO man WTF is a poocharger?

Alternative fuel source enhancer :D

Keith

Turbo LS1 SS
10-01-2007, 03:57 PM
it twas no accident. i call them poochargers. my partner in crime has a poocharger, and i have a turby

Websy21
10-01-2007, 04:35 PM
try the EPP forced induction cam I beleive its 232/240 .6xx/.6xx 115LSA and there are a few on here that run it successfully with s/c and turbo's. I am going with something similiar in my 408/turbo build this winter

Navy David SS
10-01-2007, 06:30 PM
I have yet to figure out why people ask this question. There is NO straight up correct answer.

Call one of our turbo/sc sponsors. Tell them what your goals are. They will order you the correct cam. Also, don't believe all the crap about "you don't need a big cam" to make power. BS. A small cam may get you some boost. You may not need it, but it surely doesn't hurt either. I DON'T consider mine large by any means. I believe that the head/cam choice I made has allowed me to get low 9's on 10lbs of boost. CHOOSE WISELY!! and just call W2W or LS1Speed and get it done right the 1st time.

David

slowredz
10-01-2007, 07:40 PM
Mine is a 270/290 on a 115 :secret:

daniel6718
10-01-2007, 07:42 PM
Mine is a 270/290 on a 115 :secret:


how big of a motor? cant be at .50....tats huge...

i can keep secrets

Turbo LS1 SS
10-01-2007, 08:05 PM
snip


it really depends on the application. if its a street/strip car, a large cam is not liked by a lota people if its going to drive like poop. if its a strip car, by all means, go with a larger cam.

SSilverSSurfer
10-01-2007, 08:45 PM
how big of a motor? cant be at .50....tats huge...

i can keep secrets
shit must be solid roller :cool:

98Z28MASS
10-01-2007, 08:53 PM
shit must be solid roller :cool:

Nah 3/4 race cam...lol

slowredz
10-01-2007, 09:25 PM
shit must be solid roller :cool:

:nod:

slowredz
10-01-2007, 09:28 PM
it really depends on the application. if its a street/strip car, a large cam is not liked by a lota people if its going to drive like poop. if its a strip car, by all means, go with a larger cam.

Driveability is mostly in the tune not the cam. Tuners often use that as an excuse for not being able to get a car to drive good. My last cam in my nitrous 347 motor was a 244/254 644/654 on a 112 and drove and idled great.

LSInnovations
10-01-2007, 10:06 PM
I'm making 1200 rwhp with a S91... I went with a RV cam...its the shit..just ask anyones grampa

SSilverSSurfer
10-01-2007, 10:32 PM
would solid roller benefit highly on a street car with a 347/76mm combo? i rarely sww solid roller set ups on turbo cars, only on race cars

njc.corp
10-01-2007, 11:03 PM
I'm making 1200 rwhp with a S91... I went with a RV cam...its the shit..just ask anyones grampa


sorry to go off the topic a bit-but how much more hp as the s91 got on your setup?

and whats max boost efficency for the s91

Pro Stock John
10-02-2007, 08:34 AM
What size engine?

cablebandit
10-02-2007, 10:20 AM
mine is 238/238 585/585 116lsa. I got it because it was in the range i was looking for and a good deal used. Is it ideal for max power output? i am sure it isnt it but it idles and drives well with my 3.08 gears and tight converter and performs well at the track. There are so many variables that your question needs to be answered by a cam expert. Also you really need to see where your priorities fall for street/track/idle/lope etc

DrTurbo
10-02-2007, 11:34 AM
I'm making 1200 rwhp with a S91... I went with a RV cam...its the shit..just ask anyones grampa

Nice....what were the final numbers??

No Juice
10-02-2007, 01:19 PM
Well think strictly race, I don't care how it idles. This is on a 427 race motor. We are pegging the boost gauge at 30psi but not making the power we want with a 238/248 115 +0 Comp cam. I think this cam has about 13 deg of overlap in it.

LSInnovations, what cam are you running? pm me some details please

Gold Phoenix
10-02-2007, 01:45 PM
Well think strictly race, I don't care how it idles. This is on a 427 race motor. We are pegging the boost gauge at 30psi but not making the power we want with a 238/248 115 +0 Comp cam. I think this cam has about 13 deg of overlap in it.

LSInnovations, what cam are you running? pm me some details please

Is this a turbo or supercharged motor? My setup with a maxed out pulley I am only seeing about 16psi of boost. I have read a few engine builder make over 1200HP still using a hydraulic roller cam.

cablebandit
10-02-2007, 01:46 PM
strictly race...i think you need to be in the 264 range......you need to talk to w2w

Pro Stock John
10-02-2007, 02:29 PM
I thought LS1innovations was kidding.

When I had my 236/246 blower cam I was told that the NMRA guys run more cam than that. Comp suggested a 240/244 for me, so maybe folks would suggest 24x/25x stuff.

NA$TY-TA
10-02-2007, 02:45 PM
I thought LS1innovations was kidding.

When I had my 236/246 blower cam I was told that the NMRA guys run more cam than that. Comp suggested a 240/244 for me, so maybe folks would suggest 24x/25x stuff.


John ill be around there and around .700 lift..... should be fun...........

slowredz
10-02-2007, 03:04 PM
Is this a turbo or supercharged motor? My setup with a maxed out pulley I am only seeing about 16psi of boost. I have read a few engine builder make over 1200HP still using a hydraulic roller cam.

What have you made so far? My setup is VERY similar to yours:nod:

No Juice
10-02-2007, 03:42 PM
I thought LS1innovations was kidding.

When I had my 236/246 blower cam I was told that the NMRA guys run more cam than that. Comp suggested a 240/244 for me, so maybe folks would suggest 24x/25x stuff.


Do you by chance know what kind of overlap you had with that cam?

Pro Stock John
10-02-2007, 04:28 PM
It was a 236/246//114 grind.