2000 Camaro SS

[quote]Originally posted by topfig1:
<strong>So if I'm reading correctly, My comp Cam 212/212 574 lift 115 LSA is really not going to give me much power at all. Correct me if I am wrong.

topfig
MGySgt USMC</strong><hr></blockquote>

I think you would gain a lot with a set of headers added to your setup.

Matt98SS

[quote]Originally posted by Red02LS1:
<strong>Are there any cams out there that have around 218-221 duration with lifts in the .530- .540 range?</strong><hr></blockquote>

yep IRS sells a bunch of Comp Cams with .537" lift

227Hawk

iTrader: (1)

TTT Lets keep this going and see if we can
get some more practical applications
and input <img src="gr_grin.gif" border="0">

y2kz28

I'm running a 218/224 .528/.535 114LSA with my setup. My car runs great, but, am I losing out on any major HP by not running something else?

Crazyquik

[quote]Originally posted by bigSS:
<strong>What about ramp rates and duration at .006 lift? I think that this is failry important and hasn't been discussed yet.</strong><hr></blockquote>


I'd say duration at .006" is a better determinent of idle quality and rpm range than at .050" It is much more accurate at telling us how long the valve is off the seat than .050" is. A cam with relativly slow ramps (old T1) will have more duration at the seat, but less at .050 than the Thunder Racing 224. At a glance you'd think the T1 would idle better and make power lower (just looking at .050" #s) but really, the TR224 has less duration at the seat, is off the seat for less time, but it ramps the valves open much faster so it has more duration at .050".

J.

Dope

iTrader: (2)

What I'm curious about, is reliability.

How often are spring changes needed? Say on a .525 lift vs a .550-.560 lift (t1, b1, c1). 918 springs I'll assume.

I have an A4 daily driver personally - I drive 14-15k miles a year. I don't need to be swapping springs every Summer. I like the B1 a lot but reliability and drivability comes first unfortunately. I've been pondering a 220/220 - 222/222 duration cam with low lift, like .520-530 range (114 LSA). I can't imagine I would be losing tons of power over the equivalent B1/C1 cam with the same duration, only higher lift. What kind of power difference are we talkin here? 5rwhp?

Dope

Raughammer

[quote]Originally posted by Marty:
<strong>What valve spring would you need to hold a cam w/ say 580-590 lift?</strong><hr></blockquote>
1st issue:

There are folks running low to mid .580 lift cams with the 918 springs.

2nd issue:
So...has anyone actually seen a properly set up spring package begin to fail after two years or 50000 miles. (941's need not apply LOL)

I think people are REALLY over playing this "changing the spring every year" thing.

I know folks who have over 100K miles, split pattern 55x/56x lift cams who have NEVER had ANY spring issues.


Lift is almost "free HP" IMO. If you can afford the better springs... go for it.

The earlier posts in this thread about dual pattern cams making more HP than single pattern cams (generally speaking) I find nothing short of wrong. (at least for 99% of the people on this board)

If you go for a low lift cam (.500 or so lift)... you are leaving HP/Performance on the table. (IMO) Personaly I have seen no evidence of this hyped, "spring fatigue". If the spring was well chosen and had a good "cushion". "Cushion" being, a spring rated for 30 or 40 thous more lift than what is actually being used.

For example my springs are rated for over 610 lift....my cam? It is a .581 lift Comp. This issue of "spring fatigue"? I am SO not worried about it.

P.S., dyno-tricks/shmyno tricks. <img src="images/icons/rolleyes.gif" border="0">

J'sRamAir

[quote]Originally posted by Raughammer:
<strong>For example my springs are rated for over 610 lift....</strong><hr></blockquote>

What springs are those?

Crazyquik

He uses a double spring. 2 springs for each valve instead of one.

Spring life will also vary with driving style. People who crank up the car, get it out of the driveway, and run it to redline will probably fatigue the springs more than people who wait untill the entire engine is warmed up before they beat on it. I know some people who've had 0 problems with 941s. Other people broke them left and right. Makes me think personal driving style may have had something to do with spring breakage.

J.

Carlitos

[quote]Originally posted by Marty:
<strong>What valve spring would you need to hold a cam w/ say 580-590 lift?</strong><hr></blockquote>

I'm using the 918s for my .581/.588 lift cam. Only have about 1k miles on them so far. The 918s are rated by Comp at I think .625. Worried about changing springs every year?...Nah! After doing my cam install (with some help from Dean98TA) I realized that a spring swap isn't really that big of a deal anyways.

As far as cams with big durations, I've got a 224/228 with 114 LSA. Does it make more power than the other cams?...Dunno. I have yet to dyno/track test it. I still have a couple other mods I want to do before I test it out. I do know that the SOTP difference from stock was ungodly! It starts pulling around 2700 and keeps pulling right up to 6600! I'm sure some of the other cams do this, too, but I kind of like being a little different. I would not, however recommend anything larger than this for a stock cubed/bottom end car. You would have to spin the engine way too fast in order to make any power out of it.

<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />

SmithZ

I have some dyno #'s I want to share.!
My car:A4,3:73,ST3500,SLPheaders & B&B.
I installed the Hammer cam-It dyno'd 358
that's with ED's tuning. And ran 12.4 on
ET streets.
I Then installed the TR220-114 cam dyno'd
355. Thats three less HP, no biggie.But I now run 12.0's I had a print out of the two cams together. Man was I supprised. @ 4500RPMS I went from 351 to 375 in torque and 296.8HP to 316. Talk about power under the curve! I could feel the difference in the lower RPM's. It allmost felt like I had a lower stall converter!
No flames, just reporting what I found.

Matt98SS

good post...goes to show that bigger is not always better with cams. and most of the cars will fair better on the smaller side unless its a max effort

VINCE

iTrader: (1)

someone mentioned that the TR224 ramps faster than the Lunati T1 cam(Old T1)? Also, is the TR224 cam with the same set of heads going to make more power under the curve than the same old T1?

SuperSport2000

I am thinking of doing a solid roller cam conversion. I am going to get ARE stage II heads TandD adjustable rockers and a 620. lift 230. duration 112LSA. I am doing this all on my stock 346cid. I am also replacing lifters and all the other crap. My question to you guys is how much duration you think I should go with?
Thanks
Jasen

Psycho Dave

What is a popular cam for stock heads? I see you guys talkin about the duration of all of these cams..is this advertised duration or @.050??? What are the specs on a stock LS1 cam for 2000? What is the ratio of the rockers on a 2000 LS1?? TIA

-Dave

[ January 22, 2002: Message edited by: Psycho Dave ]</p>

Crazyquik

Tell Nick all the specs of your setup and goals, and let him spec out a solid roller. Since they have ramps that are much faster, you really cant compare them to hydralic cam specs.

I guess duratation at the seat would be similar though.

2000 Camaro SS

[quote]Originally posted by vmoore:
<strong>someone mentioned that the TR224 ramps faster than the Lunati T1 cam(Old T1)? Also, is the TR224 cam with the same set of heads going to make more power under the curve than the same old T1?</strong><hr></blockquote>


Does anyone know if this still holds true about Lunati cams? I am not sure if this was a thing of the past. When I bought my 221/224 .558 .560 @114 the advertisment spoke about a "very fast ramp rate" with this cam. By the way bought from TR also.

Freak

How much do cams in the 220-224 range affect idle to 1500 RPM torque? I know they must affect it some, but is it hard to take off smoothly from a red light without reving it all to hell? Would 4.10s be enough to make up for it

more specificlay, would a 224 be noticably lacking vs a 220 on the street?

One other question, would the idle be noticalbly different.

Above questions assume 112 LSA for all cams

Carlitos

[quote]Originally posted by Psycho Dave:
<strong>What is a popular cam for stock heads? I see you guys talkin about the duration of all of these cams..is this advertised duration or @.050??? What are the specs on a stock LS1 cam for 2000? What is the ratio of the rockers on a 2000 LS1?? TIA

-Dave

[ January 22, 2002: Message edited by: Psycho Dave ]</strong><hr></blockquote>

Duration at .050"

'Los

Marty

What valve spring would you need to hold a cam w/ say 580-590 lift?