Advanced Tech Advanced tech discussion. Major rebuilds, engine theory, etc.
HIGH-END DISCUSSION ONLY - NOT FOR GENERAL TECH INFO

SR Camshaft Selection Help Needed!!!

Thread Tools
 
Search this Thread
 
Old May 3, 2007 | 06:29 PM
  #1  
My Iroc Z28's Avatar
Thread Starter
Registered User
 
Joined: Oct 2003
Posts: 739
From: Chicago, IL
SR Camshaft Selection Help Needed!!!

Im looking for someone that can either make or help me Spec out a solid roller camshaft for my 396. It needs to be ground on a Small base circle .900'' and Unfortunally i don't have the knowledge to know what will work and what won't so im looking for a company thats proven and that i can trust to spec the cam correctly. so the motor reaches it's max potiential and i won't have to tear into because Cam B is really what i needed for my goals instead of Cam A. So im turning to the experienced bunch for recommendations on who to contact.

My Goals with the car are low 11's high 10's on the motor, i have a wet kit from my previous engine but would like to keep it off and run the car N/A. It's a Street/Strip Car and is full weight. 6-speed with a 12 bolt rearend w/4.30 gears.

Engine Specs
Competition 396 by GES
Eagle 4340 Crank
Eagle 6'" Rods
Mahle Forged -5cc Pistons & low Drag Rings
ARP hardware
Deck height is 0
Compressed height of piston is a 1.062
.036 Cometic head gasket and 61cc head will be a 12.02 compression ratio.
Melling HV Oil Pump
Canton 6qt Oil Pan

Head & Intake Specs
Ported TFS Heads, 61cc Chamber
Valve Springs???
Locks & Retainers???
Ported Intake to match the heads
Asm Mono blade TB

Intake Exhaust
.100 68 54
.200 143 117
.300 217 177
.400 263 219
.500 290 243
.550 293 251
.600 294 257



Valvetrain
Cam ?????
LT4 HD Timing set
Jesel Shaft mounts 1.6
Morel SR lifters w/ Tie bar
Pushrods???

Exhaust Specs
Kooks 1-3/4 to 1-7/8 stepped headers
3'' True duals w/ Flowmaster Single chamber mufflers

This is the basic info on the engine combo, all left i really need is to get the cam spec'ed out and i can start putting this bad boy together. Hopefully with the quality of parts i have here & good tuning i can easily reach my 1/4 mile goals. Thanks for the help guys, if you see anything that might need to be addressed or recommend anything please speak up... theres alot of time, money, blood, sweat & tears going into this project i would like it to come out correctly the first time .

Last edited by My Iroc Z28; May 3, 2007 at 06:31 PM.
Old May 4, 2007 | 04:09 AM
  #2  
rskrause's Avatar
Moderator
 
Joined: Dec 1969
Posts: 10,745
From: Buffalo, New York
You might want to contact Bret Bauer.

Rich
Old May 4, 2007 | 05:07 AM
  #3  
95ttoplt1's Avatar
Registered User
 
Joined: Jun 2004
Posts: 411
Bret, AI, or Cam Motion. I have seen very good results from all of these companies.
Old May 4, 2007 | 05:08 PM
  #4  
383Z4ME's Avatar
Registered User
 
Joined: May 2003
Posts: 263
From: Grand Rapids, MI


I made 448 through a TH400 with a 4200 stall 9.5" converter with this cam
Old May 4, 2007 | 10:48 PM
  #5  
unstable bob's Avatar
Registered User
 
Joined: Jul 1999
Posts: 184
From: Wastelands of NJ
Thumbs up

Bret gets my vote.
Old May 5, 2007 | 11:09 AM
  #6  
amean94ta's Avatar
Registered User
 
Joined: Jul 2003
Posts: 1,991
From: pa
bret gets my vote also he did great work with mine
Old May 5, 2007 | 11:26 AM
  #7  
Denny McLain's Avatar
Registered User
 
Joined: Jul 2001
Posts: 752
From: Double Oak TX
Originally Posted by 383Z4ME


I made 448 through a TH400 with a 4200 stall 9.5" converter with this cam
Found in my experience anyway that LTx stroker motors seem to perform at their best with a little less duration than the card shows. Especially if you have larger intake ports in the heads. I've tried as much as 254/263 duration solid roller with .680/.670 lift (or pretty close) and currently make more power with just a 245/248 .630/.630 hydraulic cam.

Still have an issue I can't seem to find, but the car made as much as 483 rwhp and has an exceptional powerband. Everything says I should be making quite a bit more but we'll get there....when we get there.

The very first thing I do is plug in the dyno numbers into an excell spread sheet to see what my average gain/loss is going through a simulated 1/4th mile run. Basically do the average hp within the rpm range of each gear. A lot more meaningfull than peak power.
Old May 5, 2007 | 11:57 AM
  #8  
383Z4ME's Avatar
Registered User
 
Joined: May 2003
Posts: 263
From: Grand Rapids, MI
Nitrous grind

Hi Guys,

I think the horseower is not representative of the final goal for this cam. I knew the LT4 intake would only support so much airflow. I'd hoped to see 480ish really but the nitrous was going to be my equalizer for the intake restriction. The duration was for the nitrous. Cam is installed straight up.
Old May 5, 2007 | 01:04 PM
  #9  
Denny McLain's Avatar
Registered User
 
Joined: Jul 2001
Posts: 752
From: Double Oak TX
Originally Posted by 383Z4ME
Hi Guys,

the nitrous was going to be my equalizer. .
My favorite original one liner regarding nitrous is....."A monkey on a Tricycle could run 11's with enough nitrous"

I'd say you got that right, it does work.
Old May 6, 2007 | 01:32 AM
  #10  
383Z4ME's Avatar
Registered User
 
Joined: May 2003
Posts: 263
From: Grand Rapids, MI
Wink

Originally Posted by Denny McLain
My favorite original one liner regarding nitrous is....."A monkey on a Tricycle could run 11's with enough nitrous"

I'd say you got that right, it does work.
Right. With due care, a lot of electronics and good block prep.
Old May 6, 2007 | 09:40 AM
  #11  
Z-RATED94's Avatar
Registered User
 
Joined: Jun 2003
Posts: 3,557
From: Carol Stream, Il.
Originally Posted by Denny McLain
My favorite original one liner regarding nitrous is....."A monkey on a Tricycle could run 11's with enough nitrous"

I'd say you got that right, it does work.
Thank you, I'll remember that one. All though my short term memory isn't what it use.............................wait, what was I talking about? Nitrous, monkey, three wheels, 11's?
Old May 6, 2007 | 09:49 AM
  #12  
rskrause's Avatar
Moderator
 
Joined: Dec 1969
Posts: 10,745
From: Buffalo, New York
Originally Posted by Denny McLain
My favorite original one liner regarding nitrous is....."A monkey on a Tricycle could run 11's with enough nitrous"

I'd say you got that right, it does work.





There is really a little more to it than that. But some truth to it, for sure.

Rich
Old May 7, 2007 | 07:45 AM
  #13  
383Z4ME's Avatar
Registered User
 
Joined: May 2003
Posts: 263
From: Grand Rapids, MI
Question I shouldn't need the monkey

Is this a standing joke? Are we prejudiced against power-adders? I hope to see a mid 10 na and low 9's with the nitrous. Is this not a sensible goal? This is an LT1 block for gosh sakes. I got into the 11's with my nearly stock LS1.
Old May 7, 2007 | 08:44 AM
  #14  
rskrause's Avatar
Moderator
 
Joined: Dec 1969
Posts: 10,745
From: Buffalo, New York
People who run NA often do look down on the PA people. They think of PA's as "shortcuts" or "cheating". They are probably just jealous!

Rich
Old May 7, 2007 | 08:52 AM
  #15  
Denny McLain's Avatar
Registered User
 
Joined: Jul 2001
Posts: 752
From: Double Oak TX
Originally Posted by rskrause




There is really a little more to it than that. But some truth to it, for sure.

Rich
That was funny!



All times are GMT -5. The time now is 03:19 PM.