zrated383

Continuing on with my 355 build. I want to go with AFR 190s, hopefully get around 10.1 compression with the 58cc chambers, and a Holley Stealthram. I want a nice street monster that will pull till about 6000rpms. I was reading a post about a guy that ran the Lingenfelter 211/219 cam with this combo and yielded about 300hp to the wheels. Here is the link:

350 w/HSR and 211/219 Lingenfelter cam Dyno Results

This sounds like a great combo and I was going to go with it or the LPE 219/219 cam. However, I am dieing to see what the new XFI cams from Comp will make for power. I think the 268XFI is very close to the LPE cams with some more lift. I also looked at the 280XFI, and have seen some recommendations to run it on 350s, but I really do not want to overcam this thing since it will be 98% street driven. In a nutshell, should I try the new XFI cam or go with an already proven LPE cam that makes great power and an awesome torque curve?

1989GTATransAm

iTrader: (3)

The Lingenfelter cams are now somewhat dated. The XFI cams are based on newer technology. You will be better off with the XFI cams. They have more area under the curve. Not to say that the Lingenfelter cams are bad and won't do the job but time is marching on and newer and better products are hitting the market.

Dialed_In

iTrader: (3)

Yes. As stated above, the ramp design and overall dynamics of the LPE cams are beginning to get out-dated.

Get the heads first and flow them. Then have your engine builder pick a cam based on the performance of the heads and your needs. I ordered up a custom cam from ISKY to go with my AFR 195's. Flow dropped off a little below .550" so no need for anything more.


FWIW, have a good head porter do the chambers on those heads. I smoothed out and relived the walls of my chambers and unshrouded the intake. With a 5 angle job they flowed 4% more than AFR's full CNC'd heads on the same bench. Didn't touch the ports.

GMguy

hi was reading your post , an was wondering if u know the spec on those 2 cam u are talking about ? rpm range ect

zrated383

Lingenfelter 211/219 cam:

Manufacturer: Lingenfelter Performance Engineering
Camshaft Type: Hydraulic Roller
Basic RPM Range: XXX
Duration @ 0.050" Lift Int/Exh: 211 / 219
Advertised Duration, Int/Exh: 270 / 280
Valve Lift: 0.530 / 0.560
LSA: 112
Grind Number: LPE-74211

Comp Cams 268XFI cam:

Manufacturer: Competition Cams
Camshaft Type: Hydraulic Roller
Basic RPM Range : 1800-5800
Duration @ 0.050" Lift Int/Exh: 218 / 224
Advertised Duratation, Int/Exh: 268 / 276
Valve Lift: 0.570 / 0.565
LSA: 113
Grind Number: CS 268XFI HR-13

high c

i think i would still go with Lingenfelter if i was runing a stock/moded tpi intake set up just because the max rev rang (befor tpi run out of breathing) is around 4500-4700 rpm
my .02

zrated383

I am going with a Holley Stealthram.

Dialed_In

iTrader: (3)

Both of those cams are too small. Go for something 225-230* duration wise.