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

Which cam would be better-LT1 or L98?

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Old Mar 15, 2001 | 05:34 PM
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Tab92bird's Avatar
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From: Ft.Worth-Dallas, TX
Which cam would be better-LT1 or L98?

I plan on swapping out mr. peanut sometime soon, but I can't decide which cam would work best for me. I have my mods listed below, and sometime in the future I would like to put on a new intake manifold, and perhaps gasket match it; so I want a cam that would work fine with what I have now. I'd like to retain the stock chip if I can, and maybe be able to pass emissions if I see fit. I plan on swapping out the springs at the same time, so hopefully I can have something like a 2000-5000 rpm powerband.

Thanks,
Brandon

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White '92 Firebird w/ 305 TBI. Open element w/ non drop base, increased fuel pressure, TBI spacer, Hedman Hedders & y-pipe, no cat, cat-back exhaust
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Old Mar 16, 2001 | 01:22 AM
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btt, I know someone has ideas on this.
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Old Mar 16, 2001 | 03:21 AM
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<font face="Verdana, Arial" size="2">I plan on swapping out mr. peanut sometime soon....</font>
What the hell did I ever do to you?

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Old Mar 16, 2001 | 12:13 PM
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uhhh...I'm just not going to comment
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Old Mar 16, 2001 | 12:40 PM
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I'm using the LT1 cam in my 350 that I ordered 4-5 years ago and it has ran great with it and the TBI. The Holley manifold that I installed recently cured my EGR code that was always being set. There is an erratic idle but it's not that bad. I would recommend a set of good heads and a decent manifold if your going to do the cam swap though b/c the stock cam and heads won't allow you to use the cams full potential. The cheapest route would be to buy some vortec heads and a vortec "carb" manifold and this should allow you to see a nice increase in power....however the vortec heads don't have EGR provisions.

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1988 TA 300+hp 350 w/ TBI and Holley TB unit, Holley projection intake,
WC T-5, 3.42 gears w/ Auburn posi. MSD 6A, edelbrock TES headers, dynomax 3" cat and cat-back system, ACCEL coil, polyurethane bushings all around, aluminum driveshaft, Mr. Gasket open air cleaner.

1993 S-10 w/ 4.3L V6 TBI, slightly bigger cam, Mild polish job and 3 angle valve job on heads, Edlebrock TES headers, Dynomax cat back, MSD 6A, ADS chip

2000 Kawasaki KX 125
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Old Mar 16, 2001 | 06:34 PM
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Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
The LT1 cam and L98 cam have almost the same duration, but the LT1 cam has more lift. Go with it. Try to get a 92-95 LT1 cam, as the 96-97's are slightly different.

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Old Jul 17, 2002 | 10:50 PM
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I have a lt1 cam for sale..$35 plus shipping

nate
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Old Jul 18, 2002 | 12:36 PM
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From: Randleman,NC,USA
Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
Nate has a great price on his LT1 cam there. I would recommend changing the intake while you have it off. Stock is almost as bad as that peanut cam. The Edelbrock TBI intake will give you a painless installation and more HP. Your powerband should pull well to the 6000rpm range due to the less cubes of the 305 vs 350.
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Old Jul 18, 2002 | 03:10 PM
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From: Lancaster, CA.
Car: '92 Camaro RS
Engine: 355 TPI
Transmission: Tremec T-56
Axle/Gears: 10 bolt/3.42
[QUOTE]Originally posted by Kevin91Z
[B]The LT1 cam and L98 cam have almost the same duration, but the LT1 cam has more lift. Go with it. Try to get a 92-95 LT1 cam, as the 96-97's are slightly different.

Kevin - the LT1 cam that I am looking at is from a 95 - 97 part # 12551705, will I still be able to use it?

Jonathan...

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Old Jul 19, 2002 | 12:48 AM
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Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Yes you can use it, but the dowel pin on the front will be too long. You can just cut it off to the correct length, since thats easier than trying to remove the thing, its stuck in there tight.
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Old Jul 19, 2002 | 02:10 AM
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definetly get rid of the stock manifold while doing a cam swap since youll be pulling it off anyways. Even with the stock cam the edelbrock TBI intake seems to pull much better and further. used to hit a brick wall at 4500 now i can pull to at least 5k with ease...still havent went over that yet tho.
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Old Jul 19, 2002 | 02:19 PM
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pulled mine into six grand the other day. Really drops off at 5200 but put me back into my power band when I dropped into second. I'm really wondering what a set of heads and an intake will do for me.
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Old Jul 20, 2002 | 03:05 AM
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I thought about swapping a LT1 cam and world heads on my 305 but i decided to get a lo5, then put a cam in it and heads someday. figured id replace the worn out 305 with a brand new 350. Then ill get to watch the 700r4 crap out...
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Old Jul 20, 2002 | 10:28 AM
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A cam alone will do wonders for an LO3... but since your in there anyways.. do the intake swap. It only makes sense..
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