LT4 Hot Cam
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Joined: Sep 2000
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From: Michigan
LT4 Hot Cam
I am currently rebuilding a 350 TPI motor out of an 89 Trans Am GTA. I want to use the LT4 Hot Cam. From what I've heard, it should work ok. What do you guys think about it? How is the idle? Am I going to have problems using either the stock ECM, or can I/should I use a JET Stage 2 chip? What about lifters, which ones should I get? Any help would be much appreciated. Thanks.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Lifters? Reuse the stock ones if they're ok. Or did you mean roller rockers?
The cam will work great in a TPI engine, but it likes to have lots of airflow. If you stick it in a 350 with stock heads and intake, its gonna suck and idle terrible.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
The cam will work great in a TPI engine, but it likes to have lots of airflow. If you stick it in a 350 with stock heads and intake, its gonna suck and idle terrible.
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
TGO Supporter
Joined: Jul 1999
Posts: 10,907
Likes: 5
From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
On the chip, forget the Jet Stage 2 chip. I have a .BIN for the Jet Stage 2 chip and all it does over the stock chip is alter the ignition timing slightly. It does nothing to the PE (Power Enrichment) Tables nor alters anything that would assist in the Injector Pulse Widths or IAC, which is what you really need to do. Complete rip-off IMO.
Save your money and learn to burn your own Eprom. The money you would spend on that useless Jet Shipt would pay for the Programmer (the most expensive part at $129.95) and all you would have to do is to get the Editor (like TunerCat for $69.99) and the UV Eraser ($39.95) and you'd have all the basic hardware to begin playing away.
What's even better, you can constantly tweak with it to get an even better running Eprom than anyone else could ever burn (a custom chip is NOT that custom or that exact). And, when you make further modifications (I seriously doubt that you will leave the stock TPI and heads on with that LT-4 Hot Cam), it costs NOTHING to burn another chip.
In fact, by the time you add up the cost for 2 custom chips (the first one for the LT-4 Hot Cam and the second one when you eventually change your intake and heads), you'll be cheaper off burning your own chip and ultimately have a vastly superior chip.
Save your money and learn to burn your own Eprom. The money you would spend on that useless Jet Shipt would pay for the Programmer (the most expensive part at $129.95) and all you would have to do is to get the Editor (like TunerCat for $69.99) and the UV Eraser ($39.95) and you'd have all the basic hardware to begin playing away.
What's even better, you can constantly tweak with it to get an even better running Eprom than anyone else could ever burn (a custom chip is NOT that custom or that exact). And, when you make further modifications (I seriously doubt that you will leave the stock TPI and heads on with that LT-4 Hot Cam), it costs NOTHING to burn another chip.
In fact, by the time you add up the cost for 2 custom chips (the first one for the LT-4 Hot Cam and the second one when you eventually change your intake and heads), you'll be cheaper off burning your own chip and ultimately have a vastly superior chip.
Senior Member
Joined: May 2000
Posts: 980
Likes: 1
Originally posted by Glenn91L98GTA:
On the chip, forget the Jet Stage 2 chip. I have a .BIN for the Jet Stage 2 chip and all it does over the stock chip is alter the ignition timing slightly. It does nothing to the PE (Power Enrichment) Tables nor alters anything that would assist in the Injector Pulse Widths or IAC, which is what you really need to do. Complete rip-off IMO.
Save your money and learn to burn your own Eprom. The money you would spend on that useless Jet Shipt would pay for the Programmer (the most expensive part at $129.95) and all you would have to do is to get the Editor (like TunerCat for $69.99) and the UV Eraser ($39.95) and you'd have all the basic hardware to begin playing away.
What's even better, you can constantly tweak with it to get an even better running Eprom than anyone else could ever burn (a custom chip is NOT that custom or that exact). And, when you make further modifications (I seriously doubt that you will leave the stock TPI and heads on with that LT-4 Hot Cam), it costs NOTHING to burn another chip.
In fact, by the time you add up the cost for 2 custom chips (the first one for the LT-4 Hot Cam and the second one when you eventually change your intake and heads), you'll be cheaper off burning your own chip and ultimately have a vastly superior chip.
On the chip, forget the Jet Stage 2 chip. I have a .BIN for the Jet Stage 2 chip and all it does over the stock chip is alter the ignition timing slightly. It does nothing to the PE (Power Enrichment) Tables nor alters anything that would assist in the Injector Pulse Widths or IAC, which is what you really need to do. Complete rip-off IMO.
Save your money and learn to burn your own Eprom. The money you would spend on that useless Jet Shipt would pay for the Programmer (the most expensive part at $129.95) and all you would have to do is to get the Editor (like TunerCat for $69.99) and the UV Eraser ($39.95) and you'd have all the basic hardware to begin playing away.
What's even better, you can constantly tweak with it to get an even better running Eprom than anyone else could ever burn (a custom chip is NOT that custom or that exact). And, when you make further modifications (I seriously doubt that you will leave the stock TPI and heads on with that LT-4 Hot Cam), it costs NOTHING to burn another chip.
In fact, by the time you add up the cost for 2 custom chips (the first one for the LT-4 Hot Cam and the second one when you eventually change your intake and heads), you'll be cheaper off burning your own chip and ultimately have a vastly superior chip.
Hmmmm! Wonder why you got that from Glenn
HeheI was really dissapointed myself when I looked at that .bin ! Only a couple degrees of timing added and that's IT! And people pay hundreds of dollars for THAT ? Maaan am I in the wrong business!
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92 Z28 L98 350
---------------
Ported stock heads, XR270HR-10 cam, TES headers, Crane AFPR, Flowmaster catback, MSD ignition components.
Best ET 13.5@105 mph
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
Click here to see my car at Truspeed.org
Check out TruSpeed at http://www.truspeed.org
Check out the Bin Archive at http://www.truspeed.org/bins.html
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Joined: Jul 1999
Posts: 10,907
Likes: 5
From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
I hear you Blade. I had to look after you had pointed out earlier how uselss the "enhancements" are of the Jet Stage 2 chip on the Prom Board. And I completely agree with you. It really is useless, other than using as a "suppository" for a newly burnt 27C256 chip.
I have an ADS Super Shipt which I plan on reading (now that I finally got my Pocket Programmer) and I except the same thing...another complete rip-off that does little more than add a few degrees of timing at the 3,000-4,800 rpm level.
Your are right, we ARE in the wrong business. But I would feel bad ripping off the general public like they do.
I have an ADS Super Shipt which I plan on reading (now that I finally got my Pocket Programmer) and I except the same thing...another complete rip-off that does little more than add a few degrees of timing at the 3,000-4,800 rpm level.
Your are right, we ARE in the wrong business. But I would feel bad ripping off the general public like they do.
Supreme Member
Joined: Feb 2000
Posts: 1,196
Likes: 0
From: Fort Collins, Colorado
I am buying the LT4 HOT Cam and will be installing it soon. I should be done with it by the end of January, I'll let you know how it all goes.
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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End
Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.
Best ET : 14.32 @ 97.7mph
(corrected for elevation)
Next on the list: LT4 HOT Cam
------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End
Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.
Best ET : 14.32 @ 97.7mph
(corrected for elevation)
Next on the list: LT4 HOT Cam
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