rpm cam question
Thread Starter
Instructor
Joined: Jan 2013
Posts: 183
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Well I'm just tryin to see what this means, I brought up a thread about me selecting a cam but I. Haven't gotten anything. Vetteoz put in his 2 cents and a lot of people.
What I'm looking for is power in the lower rpms. Pulls hard in the low range I guess below 3,500, I cruise on the street not so much the highway.
I'm not anxious to get a cam I love my stock cam, it has what I need. I'm justtrying to understand what the difference from idle-x,xxx and the difference from 1,500-x,xxx
What I'm looking for is power in the lower rpms. Pulls hard in the low range I guess below 3,500, I cruise on the street not so much the highway.
I'm not anxious to get a cam I love my stock cam, it has what I need. I'm justtrying to understand what the difference from idle-x,xxx and the difference from 1,500-x,xxx
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
IF you are talking about a cam for a rev restricted TPI engine then you would be looking for something that matches the rev range of a TPI intake so 4500ish rpm max
A TPI intake pulls very well down low so you don't need to worry about off idle so much and possibly be looking at a cam with maybe a 1500 -4500 operating range
You are unlikely to improve on that power range
Drifting
Joined: Oct 2004
Posts: 1,477
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From: Hawaii
http://www.viperclub.org/howto/faqs/...-gear-swap.php
Racer
Joined: Dec 2007
Posts: 312
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From: San Antonio Texas
This cam is designed to get a 4300 LB beast out of the hole and moving.....I'm guessin' it'll get a 3400 LB Corvette moving, too
!PM me if interested.
KW
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Race Director
Joined: Nov 2003
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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With that 1500-XXXX rpm cam you might not notice overt affects but you'll most likely have a bit less power/response compared to an idle-XXXX cam. You might feel I tiny bit of cam surge at low rpm hwy driving. And, you'd most likely get worse MPG with the 1500 cam. (Street driving spends a lot of time at idle/off-idle conditions.)
Lift, duration, overlap, and ramp rates can affect low-rpm driveability.
Racer
Joined: Dec 2007
Posts: 312
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From: San Antonio Texas
Race Director
Joined: Jan 2005
Posts: 10,641
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From: Slidell Louisiana
If your serious about the 3500-4000 rpm max rev limit, your best choices for improvement for downlow grunt is CUBES..... Increased stroke will increase your low end grunt...or BOOST (boost will make your engine feel bigger) Nitrous may be another option however, itrous gets pricey for daily use.
I suggest you ditch the 3500 rpm max and build an engine with a wider power band and install proper gearing (and proper stall converter if you have an A4) In the long haul you will have a better performing vehicle.
Mike
I suggest you ditch the 3500 rpm max and build an engine with a wider power band and install proper gearing (and proper stall converter if you have an A4) In the long haul you will have a better performing vehicle.
Mike
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
A lot of claims such as idle to 3500 rpm or 1500 to 3500 are marketing labels. A lot of times, manufacturers will make claims to appeal to as many people as possible. You have to look at the application and specs. That doesn't answer all the questions and there are some variables such as lobe profiles or ramp rates, but it will give you a platform to compare cams so you will be comparing apples to apples.
Thread Starter
Instructor
Joined: Jan 2013
Posts: 183
Likes: 0
A lot of claims such as idle to 3500 rpm or 1500 to 3500 are marketing labels. A lot of times, manufacturers will make claims to appeal to as many people as possible. You have to look at the application and specs. That doesn't answer all the questions and there are some variables such as lobe profiles or ramp rates, but it will give you a platform to compare cams so you will be comparing apples to apples.
I STILL dont know alot about cams hahaha, just the max lift on my rockers, and a tighter lsa creates more torque and a wider one creates more on top end.I just want an honest opinion, I dont mind keeping my cam I have in there now(stock).
Will this B-body LT cam give me MORE torque down low than my stock?
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
I gotcha ya..
I STILL dont know alot about cams hahaha, just the max lift on my rockers, and a tighter lsa creates more torque and a wider one creates more on top end.I just want an honest opinion, I dont mind keeping my cam I have in there now(stock).
Will this B-body LT cam give me MORE torque down low than my stock?
I STILL dont know alot about cams hahaha, just the max lift on my rockers, and a tighter lsa creates more torque and a wider one creates more on top end.I just want an honest opinion, I dont mind keeping my cam I have in there now(stock).
Will this B-body LT cam give me MORE torque down low than my stock?
1992 Y-body: 205/207 0.451/0.450 lift 117 LSA
1993-1995 Y-body, F-body: 202/207 0.450/0.460 lift 116 LSA
1994-1996 B-bodies (including L99 4.3L): 191/196 0.418/0.430 lift 111 LSA
1996 Y-body, 1996-1997 F-body: 200/207 0.447/0.459 lift 117 LSA
1996 Y-body, F-body LT4: 203/210 0.476/0.479 lift 115 LSA
VS your 1990 cam
202/207 with .413/.428 lift and 115 LSA.
If you step up to bigger ratio rocker arms with you're current cam you'd be pretty close to the 1996 low end TORQUE MOSTER LT4 cam specs...
Mike
Last edited by aboatguy; Mar 17, 2013 at 01:41 PM.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
I gotcha ya..
I STILL dont know alot about cams hahaha, just the max lift on my rockers, and a tighter lsa creates more torque and a wider one creates more on top end.I just want an honest opinion, I dont mind keeping my cam I have in there now(stock).
Will this B-body LT cam give me MORE torque down low than my stock?
I STILL dont know alot about cams hahaha, just the max lift on my rockers, and a tighter lsa creates more torque and a wider one creates more on top end.I just want an honest opinion, I dont mind keeping my cam I have in there now(stock).
Will this B-body LT cam give me MORE torque down low than my stock?
