Hot Cam Question-read this!!
02-12-2003, 07:48 PM
#1
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Join Date: Jan 2003
Location: arizona
Posts: 104
Hot Cam Question-read this!!
I was really looking forward to putting a camshaft in my car after my other minor mods i'm doing. I was thinking the HOT CAM setup untill I read this from TPIS.Q: I have a 95 LT1, it has LT4 heads and intake, LT4 fuel injectors, 1.6 roller rockers, 52mm throttle body, 1 3/4'' SLP headers, GM Performance Parts Hot Cam, ACCEL 300+ Ignition and K&N fuel injection performance kit. Idles good, but when I hit the throttle it is slow to respond, and when it does, it isn't very impressive. Do I need a re-programmed computer? A larger fuel pump or an adjustable fuel pressure regulator? Any help you can give me would be greatly appreciated.
A: The Cam is too big for a 350 motor. I get this question all the time with the LT4 Hot Cam. If you look at the duration @ .050 it doesn't look bad , but it must be huge everywhere else in it's lift range. It would be fine in a 383 or bigger motor with a lot of compression, and a deep gear. Also the intake port volume of the heads are big for a 350 street motor. In order to use these pieces you would want to stroke the motor and or raise the c/r, or add a supercharger. When you go with big cams and 1.6 rocker ratio, and add big heads you will lose a lot of your bottom end power and most of your mid-range power. What happens is the velocity of the air slows down that's why you go slower. The whole set up is still on the big side for a 383 ci motor. You will make more power but it will be all up top.
TPiS
Go back to the top
All you Hot Cam guys out their, give me some info about the cam and what you feel about it before I spend the money....Thanks...z
A: The Cam is too big for a 350 motor. I get this question all the time with the LT4 Hot Cam. If you look at the duration @ .050 it doesn't look bad , but it must be huge everywhere else in it's lift range. It would be fine in a 383 or bigger motor with a lot of compression, and a deep gear. Also the intake port volume of the heads are big for a 350 street motor. In order to use these pieces you would want to stroke the motor and or raise the c/r, or add a supercharger. When you go with big cams and 1.6 rocker ratio, and add big heads you will lose a lot of your bottom end power and most of your mid-range power. What happens is the velocity of the air slows down that's why you go slower. The whole set up is still on the big side for a 383 ci motor. You will make more power but it will be all up top.
TPiS
Go back to the top
All you Hot Cam guys out their, give me some info about the cam and what you feel about it before I spend the money....Thanks...z
02-12-2003, 07:54 PM
#2
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Join Date: Aug 2001
Location: looking for a flow bench so Brook and I can race
Posts: 3,505
Re: Hot Cam Question-read this!!
Originally posted by fordkiller94
I was really looking forward to putting a camshaft in my car after my other minor mods i'm doing. I was thinking the HOT CAM setup untill I read this from TPIS.Q: I have a 95 LT1, it has LT4 heads and intake, LT4 fuel injectors, 1.6 roller rockers, 52mm throttle body, 1 3/4'' SLP headers, GM Performance Parts Hot Cam, ACCEL 300+ Ignition and K&N fuel injection performance kit. Idles good, but when I hit the throttle it is slow to respond, and when it does, it isn't very impressive. Do I need a re-programmed computer? A larger fuel pump or an adjustable fuel pressure regulator? Any help you can give me would be greatly appreciated.
A: The Cam is too big for a 350 motor. I get this question all the time with the LT4 Hot Cam. If you look at the duration @ .050 it doesn't look bad , but it must be huge everywhere else in it's lift range. It would be fine in a 383 or bigger motor with a lot of compression, and a deep gear. Also the intake port volume of the heads are big for a 350 street motor. In order to use these pieces you would want to stroke the motor and or raise the c/r, or add a supercharger. When you go with big cams and 1.6 rocker ratio, and add big heads you will lose a lot of your bottom end power and most of your mid-range power. What happens is the velocity of the air slows down that's why you go slower. The whole set up is still on the big side for a 383 ci motor. You will make more power but it will be all up top.
TPiS
Go back to the top
All you Hot Cam guys out their, give me some info about the cam and what you feel about it before I spend the money....Thanks...z
I was really looking forward to putting a camshaft in my car after my other minor mods i'm doing. I was thinking the HOT CAM setup untill I read this from TPIS.Q: I have a 95 LT1, it has LT4 heads and intake, LT4 fuel injectors, 1.6 roller rockers, 52mm throttle body, 1 3/4'' SLP headers, GM Performance Parts Hot Cam, ACCEL 300+ Ignition and K&N fuel injection performance kit. Idles good, but when I hit the throttle it is slow to respond, and when it does, it isn't very impressive. Do I need a re-programmed computer? A larger fuel pump or an adjustable fuel pressure regulator? Any help you can give me would be greatly appreciated.
A: The Cam is too big for a 350 motor. I get this question all the time with the LT4 Hot Cam. If you look at the duration @ .050 it doesn't look bad , but it must be huge everywhere else in it's lift range. It would be fine in a 383 or bigger motor with a lot of compression, and a deep gear. Also the intake port volume of the heads are big for a 350 street motor. In order to use these pieces you would want to stroke the motor and or raise the c/r, or add a supercharger. When you go with big cams and 1.6 rocker ratio, and add big heads you will lose a lot of your bottom end power and most of your mid-range power. What happens is the velocity of the air slows down that's why you go slower. The whole set up is still on the big side for a 383 ci motor. You will make more power but it will be all up top.
TPiS
Go back to the top
All you Hot Cam guys out their, give me some info about the cam and what you feel about it before I spend the money....Thanks...z
$4600 for a freaking heads and cam package to get 400hp
all the stroker advice i got from them was worthless too
Thank God for combo motorsports
the LT4 hotcam is far from too big for a 350.
the LT4 hot cam is a bad idea for a 383, its way too small
and an even worse idea for a blown motor. you want a blower cam for a blown motor.
02-12-2003, 07:58 PM
#3
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Join Date: Oct 1999
Location: Tulsa, OK, USA
Posts: 738
Ya right!
The HotCam is perfect for the 350. Makes me wonder about people and companies sometime. Just keep looking around on this board, there are a ton of us started off using this cam and decided it was not big enough.
The HotCam Kit is a perfect starter kit for anyone.
As for programming it really needs to have a program done on it to maximize the potential of it.
The HotCam is perfect for the 350. Makes me wonder about people and companies sometime. Just keep looking around on this board, there are a ton of us started off using this cam and decided it was not big enough.
The HotCam Kit is a perfect starter kit for anyone.
As for programming it really needs to have a program done on it to maximize the potential of it.
02-12-2003, 08:04 PM
#5
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Join Date: Aug 2001
Location: looking for a flow bench so Brook and I can race
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www.pcmforless.com for tuning
like $100 and he has it NAILED
like $100 and he has it NAILED
02-12-2003, 08:34 PM
#8
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Join Date: Oct 2002
Location: Fairmount, GA
Posts: 327
Sounds like a tactic to sell you their ZZ-9 cam.....but it went over like a terd in a punch bowl. No prob with the LT-4 cam on a 350. I hype up TPIS products all day long b/c of the quality...but i'm honestly disappointed with their responce.
02-12-2003, 08:36 PM
#9
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Join Date: Dec 1969
Location: Granger,IN. USA
Posts: 89
TPIS just wants you to buy their cam. I know dudes who have the LT4 heads, hotcam, and powerdyne running 11.90's I have stock untouched heads with the hotcam...how's 1.69 sixty foot times and a 12.39 sound to you? My advice, get the "Hotcam."
02-12-2003, 09:36 PM
#11
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Thread Starter
Join Date: Jan 2003
Location: arizona
Posts: 104
So everybody has had good results with the Hot Cam? Well I'll take your word for it over TPIS, Your right there probably after the money for their cams and making the hot cam sound like a bad choice. But I still would like peoples opinions on this camshaft, if anyone has anyhting to say..
02-12-2003, 10:11 PM
#12
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Join Date: Apr 2002
Location: Cincinnati,Ohio,U.S.
Posts: 152
hot cam too big? by far no. look at my sig. you can go a hair over .600 lift on an LT1 with a stock bottom end. A guy I know has a 396 LT4 with almost .700 lift. I would say you need a good computer program. unless your opti puke went out.
02-12-2003, 10:40 PM
#13
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Location: Bay Area, CA
Posts: 2,148
Horsepucky. Get a dyno tune IMO, I dont like mail order stuff. Find a baseline on the net if you can, and by all means look at your BLMs, if your running lean or pinging you are in danger of losing your engine.
