BES Stroked Nova

iTrader: (24)

running 12 teens with my F11 cam, and putting in a ms4 and running 11.60's in the heat... made it worth the boner i got....

Sharpe

iTrader: (7)

@ this thread.

John02SS

iTrader: (47)

The new lobes like the XFI and LSK have not performed well on my dyno. The XER lobes have out powered them everytime, and even some softer lobes have done better than the XER lobes. It sells parts, but I don't feel it will make more power. Anyone remember the TR224? It was very similiar to a XE lobe and made killer power. Ever seen the specs on Futrals Cam Motion stuff? Very similiar to the XE stuff, and even a lil softer on the exhaust.

eb02z06

iTrader: (18)

AAHHHH Cammotion-I love theres stuff! I have seen the same results you have seen bro.

You know the funny thing bro-the guys that want the LSK lobes want to run comp 918's or don't want to spend the time checking installed height or seat pressure on there springs nor do they want to spend the money on Morels and can't see the purpose of the .110 wall thick pushrod?

GrannySShifting

iTrader: (10)

Neatjust what you need. If they are exactly same profile as LSK but lower lift... they will be even HARDER to control. Let the flavor of the month cam parade continue

Patrick G

iTrader: (14)

That's a pretty bold statement. Do you have any dyno sheets to back that up? I've got lots of dyno sheets that will show you that the XFI and LSK lobes make better power when properly set up. Sadly, most people that want really aggressive lobes are not prepared to set up the valvetrain properly to handle them. When this is the case, XE high lift lobes are a no brainer.

eb02z06

iTrader: (18)

I agree with you there Patrick and that's where the problem is-the folks that want these lobes, don't spend the time setting up the valvetrian.

On the FI motors we've been building we stay away from the XE-R lobes as wee need to shim up the springs for extra seat pressure as the boost takes some of that way-then they pull cleanly past 7000 rpm.

PREDATOR-Z

Yeah but again this is due to improper valvetrain matching. Build a light valvetrain, match seat pressures to cam requirements and it will pull safely beyond your block capability.
Combo is the name of the game and no you do not need to shim all springs for XE-R, just if you are using springs that are too borderline and you need to increase open pressure capabilities.

And i have to side with Patrick when i say that you'll have a hard time convincing me that a 224/224 XE lobed cam will match a more agressive same duration lobe in a properly balanced combo. (just an exemple)
I've mixed XFI and XE-R with awsome results, or LSK and XFI (exhst).
The magic is in a matched balanced combo.

eb02z06

iTrader: (18)

We use AFR 205, and 225's here exclusively and there new 8019 spring is good for .660 lift and has a seat pressure of around 150lbs. If you put a bigger spring in there that means you need a larger retainer and then we can just start adding up the weight.

We like to keep lift at no more .600, for the guys who want all out-we stick in Ti intake valves and spin them up to 8000 with hydrauilic roller.

Beaflag VonRathburg

iTrader: (176)

Since this thread has already been I'm going off on a slight tangent. Anyone have weights of commonly used valve spring parts? I searched, but all I've found is what PREDATOR-Z posted a long time ago that a 918 ti retainer weighs 8 grams and a PRC dual ti weighs 11 grams. That's kind of on topic...

JPH

iTrader: (2)

I like this answer. Spot on Damian.

Jpr5690

iTrader: (13)

This Thread Reminds Me Soo Much Of The Thread About A Year Ago About How Big Cams Dont Make Power....

My Point Was There And Is Again Now... Everything Has Tradeoffs, Big Cams With Agressive Lobe Desgins Do Make More Power

But!!!!!

The More Agressive You Go With Any Race Part The More Tempermential It Gets... This Is The Fundemental Concept Of Hot Rodding "or Pushing It To The Edge"


Way Too Often People Take Their Daily Driven Car Slap A Huge Cam In It And Expect It To Run Like Its Stock....

News Flash Guys!!! If You Want A Stock Running Car Then You Need To Keep It Stock.. Gm Didnt Put Shitty Cams In Our Cars From The Factory.. Gm Put Cams That Were Based Mostly On Reliablity

Bottom Line, When You Bust Out The Donky Dick Cam Be Prepared To Spend Some Cash On Supporting Mods

DrkPhx

iTrader: (15)

I think the haters in here need to keep an open mind and stop making assumptions that everyone who moves to a more aggressive lobe is simply throwing caution to the wind. I don't think anyone on here is denying how good the XE/XE-R lobe family's are. Without a doubt they are proven.

My previous cam was ground on the XE-R/XE and I loved it. However, My AFR 225's were recently reworked for additional flow, upgraded to the better springs, milled for higher static compression and hollow intake valves installed. I need a slighly more aggressive cam to take advantage of this and honestly the specs were not available in either the XE or XE-R lobes, so I switched to the XFI lobes. For those who don't know, the XFI lobes have a separate set of lobes for intake and exhaust, with the exhaust being softer. Oddly enough the intake lobe I picked is slightly softer than my previous XE-R intake lobe and XFI exhaust lobe is slightly more aggressive than original exhaust lobe. Lift was only increased by .013.

dug

iTrader: (10)

cuz the dynos were with 3.42 tenbolts

Ragtop 99

iTrader: (7)

actually the TR lobe was very much like an Xer to about .200 and then finished with a lower lift. good lobe, but still a short seat to seat time.

ls2 bait

iTrader: (11)

i have an lsl cam in my new motor and thus far i like it but it wont be dynoed until next weds. 247/254 .623/.623 on a 114.

Patrick G

iTrader: (14)

I hope that cam's in a big motor.

ls2 bait

iTrader: (11)

416 ci with tfs heads.

DONAIMIAN

iTrader: (18)

The valves in my PRC 5.3's were 98g(I) and 89g(E) I didn't weight my springs (but will try before they go on), but their PSI duals that have 220 on the seat and 550 open, with PRC retainers.

XtraCajunSS

iTrader: (2)

I think a few people have mentioned the magic word here... Combination. I have some camshafts that love particular heads. The TR 224 cam is hard to beat in almost any combination and I still sell loads of them. But for someone who wants 435-450RWHP in an auto with great daily driver manners, our ExTReme 227 and a set of ET 215's are a match made in heaven. i have full weight f-body verts running mid 11's at 117-119 in STREET trim with this combo. Vig 3200, 3.73's and a set of Nittos... that cam has LSK's on a 116LSA... VERY tame combo with awesome driveability. This was simply not possible back in the day.

Shane