TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Ok, so why are LT1 cams one of the best mods for the L03?

Old 10-01-2001, 12:31 AM
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Ok, so why are LT1 cams one of the best mods for the L03?

My L03 is all stock basically and I'm still working on the game plan for mods but I've noticed that alot of people have gone to the LT1 cam instead of an aftermarket... why's this?

Up until about a year and a half ago I had no idea what headers were and I'm continuously learning. I tried to figure out cam specs and they're somewhat easy but I need some benchmarks. Can anybody explain how I can classify a cam when I see its specs? Ex: whats a hot cam, etc...

------------------
~Luke
'91 Firebird :: L03/700R4 ::
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Old 10-01-2001, 01:17 AM
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Tas
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cheap and plentiful. Used LT1 cam = $50 or less.

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305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

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[This message has been edited by Tas (edited September 30, 2001).]

[This message has been edited by JPrevost (edited October 01, 2001).]
Old 10-01-2001, 02:21 AM
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Tas has got it right. When installed on a L03 motor, it acts just like a good performing aftermarket cam for our engines would.

------------------
1992 Camaro RS (Auto) 5.0L TBI
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Old 10-01-2001, 02:26 AM
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hey Bahutmut if you're gonna be shooting nos, get the 7525. It even has Nos bungs for foggers.
Old 10-01-2001, 11:08 AM
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TAS, BahamutRS: Think you could trim the sigs alittle? They are longer than this entire thread. How about a link to a web site instead.
Old 10-01-2001, 12:47 PM
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heh, Brent I know its long but I only put it once per thread.
Old 10-01-2001, 01:23 PM
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
haha, I had to trim that image out .
I don't do that often but I had to show my POWER, lol.
Sorry Taz but it is a little oncalled for considering this isn't a Mopar board. Nothing against Mopar (hemi rocks) but it just doesn't fit well into a GM f-body tech board.

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Old 10-01-2001, 04:50 PM
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<font face="Verdana, Arial" size="2">Originally posted by Tas:
hey Bahutmut if you're gonna be shooting nos, get the 7525. It even has Nos bungs for foggers. </font>
tas, how exactly do you always come up with a more expensive way to do anything.....j/k
keep the nos to a plate system, you aren't gonna be using enough air to take advantage of a fogger set up.

later
tim


------------------
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Old 10-01-2001, 08:12 PM
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Hey, what are the specs for an LT1 cam anyway, and do they freak out our computers very much?

------------------
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14" Open Element and Flowmaster 80 seires

Next up: headers and gears
Old 10-01-2001, 09:15 PM
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Pontiac and Mopar The great duality of life.
Old 10-01-2001, 11:23 PM
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<font face="Verdana, Arial" size="2">Originally posted by Tas:
cheap and plentiful. Used LT1 cam = $50 or less.

</font>
it actually has little to do with the cos t or availability. it has mor eto do with the specs of the cams. they have low lift and fairly long durations. the low lift will allow the 305 to operate normally, with out tripping out hte ecm or causing a low vacuum situation. the longish duration will allow the engine to spin up to enough rpm to create respectable hp numbers.
cam selection is a balancing act between peak power and drivability, this cam is just a really good balance of both worlds.
the fact that it is cheap and plentiful is just a happy coincidence.

later
tim


------------------
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Check Out The East Coast F-Body Nationals Home Page
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Old 10-01-2001, 11:27 PM
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Why does everyone seem to want to contradict me lately? LT1 cams are cheap. Some people get them for $20. I don't see people going for the better LT4 cam thats like $150 now. Does anyone?
Old 10-02-2001, 03:46 PM
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Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
I got an LT4.

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91 RS 5.0 TBI....Edel. TES headers .. 3" exhaust ...Dynomax muffler...5spd... 3.08...underdrive pulleys...cold air K&N flat bottom breather...strut tower brace...6-point rollbar...sub-frame connectors...Koni shocks and struts...16" Black GTA wheels...Autometer guages...custom chip...Grant steering wheel...a/c delete...smog delete...rear seat delete...ultimate TBI mods...afpr...36mm front and 25mm rear swaybars with poly bushings...
Old 10-02-2001, 03:53 PM
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Which cam is better

LT1 or LT4 cam???



[This message has been edited by 92Camaro305TBI (edited October 02, 2001).]
Old 10-02-2001, 04:57 PM
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i didn't mean to contradict you dude, sorry about that. i just wanted to point out th etechnical reasons fro the cam being so popular and good for our motors.
the reason i stayed away from the LT4 cam was because it looks(from my modeling and math) like it will be just a little too big for most peoples combos. the lift is enough that the valve will get into that fuzzy area where air flow probs are created, this will lower the amount of vacuum at idle. it will still have plenty of vacuum to keep that ecm working correctly, but it looks like throttle response and low rpm(below 2000) power are gonna suffer a very noticable amount.
also, the duration of the cam is long enopugh to create a power band that goes wells past the efficiancies of most peoples motors. the stock heads start falling off by 3700rpm, that woudl make a cam that wants to run past 5500rpm really suffer. this also puts the power band of the cam well past the flow range of a stock or edelbrock intake, it would be holley or 4 barrel intake time.
it is a good cam, and could work for someone who is still running 1.96/1.50 valves(like the torquer 305's) but it would take some living with around town prolly, and definately need a prom to take care of the idle/low end issues. for those of us that went to 2.02/260 valves, i think it woudl be just terrible at idle as it woudl have even less vacuum.

later
tim

------------------
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New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
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DSI Racing Home Page
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