MYTURBOT/A

Lately i`ve been hearing alot that aftermarket cams don`t make much of a differance on mild turbo setups like mine. Right now i have a set of 6.0 heads, Cometic gaskets and arp head studs waiting to be installed as soon as i get the money to buy the cam from cammotion. I figured it would be easy to swap the cam while i had the heads off. But now i`m wondering if i would be better off to just get a set of 1.85 rockers to sup up the stock cam a little.
You guys think i should stick with the stock cam with rockers or go with the custom grind cam? Here`s the specs for the custom cam.
Dur. 226/218
Lift. .574/.564
LSA. 116 and a 113 intake centerline.

Thanks.

MYTURBOT/A

Hmmm, Must be a slow day.

MYTURBOT/A

This boards getting about as slow as the other ls1 board.

whitt1

Get a cam you need to change valvesprings to use the 1.85 SLP rockers,if you've gone to the trouble of changing valvesprings a cam swap is easy.The rockerarms increase the lift and increase ramp speed and will give you about 10hp,while a good cam selection can be worth 50hp or more.

tbyrne

iTrader: (15)

The custom cam would be beneficial. As as said about a good cam might be worth about 40-50hp on a blown motor. The SLP 1.85 rockers are usually good for about 15-20hp on a stock/mildly modified motor.

Tom



Order line - 1-877-4-TBYRNE
E-mail - tbyrne@tbyrne.com

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whitt1

Tom they made about 10hp on my 5.3 Magnacharger setup the good part is that it wasn't at the expense of low end power.They might make more power in a 5.7 with a larger stock cam.

MYTURBOT/A

Sweet, thats what i was wondering I`ll order the cam tonight then. thanks guys

Nasty N8

iTrader: (33)

Don`t increase the ratio of the rockers if you are going to a larger cam. You want to stay away from the added stress it will cause on the valve train. I would not rec. 1.85 on any boosted motor build the lift in the cam. The larger ratios are for those that just want a little extra umph without the expense of a cam.

Nate

MIGHTYMOUSE

iTrader: (59)

myturbo, your cam is allready larger than my cam

sure the cam would make more hp at the same boost level on a turbo, because your cylinder pressure went up.. you could do the same by upping the boost a tad.

did the magnachargerabover re-pulley to get the 10hp?

if you dont have springs capable of more lift allready then you'd have to put springs on yea..

i have dabbled at the idea of doing a cam or even the new comp shaft rockers(1.8).. but i keep getting reminded to just add another psi whenever i want more hp.. i am forgetting the beauty of the turbo system.

MYTURBOT/A

Uhh I have a bigger cam then you? .
I`ve aread done the comp. 918 swap so the springs will handle a cam or rockers but i`m thinking i`d get more out of the cam. I guess i just figured the cam would be worth another 40-60hp which would make it a worth while purchase. but if it`ll only gain me 10-20hp i`ll spend the money someplace else. Here in florida high boost don`t mix well with florida summers so i`m trying to make as much power as i can with the least amount of boost. Once i get the heads and cometics installed and get my compression down around 9:1, it`ll be about 3months and i`ll be able to get the T76 and i`m gonna tune for 12psi. But thats all the higher i want to go so it`ll still run decent in the heat.

whitt1

The 10 hp gain was with the same size pulley and 71/2lbs of boost.I gained about 30hp more when I went to 11lbs of boost making 449rwhp with my 5.3.

MIGHTYMOUSE

iTrader: (59)

my exhaust duration is a little more at 224, but you got me whooped on lift.. my lift is .523/.510 and 115 installed straight up.

if i do anything i'd like to fool with retarding this cam a few degrees.

MYTURBOT/A

I`m still runing the stock cam right now, the 226/218 cam is the one i`m gonna order.

MIGHTYMOUSE

iTrader: (59)

nm i cant read (carefully)

stock cam<my cam<that cam but i would ask them what the deal on the large exhaust split.

MYTURBOT/A

So how much do you think i would gain from switch out cams? Is it worth it? Thanks for your help guys.

MIGHTYMOUSE

iTrader: (59)

i would call george, you can prolly catch him if you call now.

i'd say you could spend the money better elsewhere.. but if you are looking to gain rumble, you should skip medium and go big

HUGGER ORANGE SS

iTrader: (2)

I love my Shaft Mounted Jessel Rockers 1.8's I have the HotCam, which is weak on the lift, but with the 1.8's it's alright. The LSA of 112, is nice and lopey, but bleed out energy, and is not the "perfect" blower cam. But she still pulled 602 RWHP with 11psi of boost.

Clint