Cam/Intake combo.. which one??
Cam/Intake combo.. which one?? Street car, 6.0 w/ L92's, 6 speed, carb deal in an old school.
1) 224/238 114+4 w/ a dual plane
2) 225/238 113+3 w/ a single plane
Or should I use more cam?
1) 224/238 114+4 w/ a dual plane
2) 225/238 113+3 w/ a single plane
Or should I use more cam?
Compression ide like to get to 11.. but it's proving to be difficult being only .001" out of the hole and the head being 70cc's... I'm in search of how much I can knock off these things to get some compression in it.
Gears as of now are 3.08's... haven't decided if I'm going 3.73 or 4.10 yet.
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My vote is the Single plane and having a custom cam specked as it's around the same price as the cam your thinking of and made just for your application. You should not decide on gearing till you get the cam to match the combo, then gear the thing.
Dual plane with a custom cam with a TIGHT LSA ! Those cams are way too wide for a carb setup. The dual plane intakes for LS3 heads are HUGE and on a 6.0, they will take you as far as your bottom end can stand, AND make gobs more low and mid range TQ than the single plane (which is also HUGE for a 6.0). If you were building a stroker motor, Id say single plane all the way. With your limited cubes, the dual plane will lay waste to the single plane setup.
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If I had to get a dual plane I'd just use the factory Ls3 or Truck intake and save some money as the RPM band wound be the same. Also read KCS saying something about the dynamics not being all that good with a carb set-up with a dual plane intake* and that it may be better with a 4 hole Throttle body with injectors. On a Vic Jr the bottom end would be a tad soft but having a Custom cam made and a bump in compression 11.0 to 11.5 would be nice if the car is light. Rev's quickly to maybe around 6500 - 6800 with a bump in compression and a 4.11 gear. Sounds good to me. The main thing is: to Not over cam it , give it some lift for a nice tight revving Rpm band.
Cam Technician : Needed.
Cam Technician : Needed.
Last edited by Wasabi; Jun 23, 2016 at 08:50 AM.
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If I had to get a dual plane I'd just use the factory Ls3 or Truck intake and save some money as the RPM band wound be the same. Also read KCS saying something about the dynamics not being all that good with a carb set-up with a dual plane intake* and that it may be better with a 4 hole Throttle body with injectors. On a Vic Jr the bottom end would be a tad soft but having a Custom cam made and a bump in compression 11.0 to 11.5 would be nice if the car is light. Rev's quickly to maybe around 6500 - 6800 with a bump in compression and a 4.11 gear. Sounds good to me. The main thing is: to Not over cam it , give it some lift for a nice tight revving Rpm band.
Cam Technician : Needed.
Cam Technician : Needed.
I am interested to see what the "other "cam guru has to say. Keep us informed.
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So this is what your saying:
http://onthedyno.com/GM-LS-motor/art...jr-vs-rpm-ls2/
Gear accordingly. Also,still give me the single plane:as a future reference for a stroker. I'm not a big fan of TQ and I also understand, that this is what you feel in the seat of your pants but we can gear a vehicle to place the rpm band where it is needed effectively giving you that feeling of pressing someone back in there seats.
All is dependent on what is wanted. Lower or upper: Hp & Tq. Gearing helps to offset this with either combo.
http://onthedyno.com/GM-LS-motor/art...jr-vs-rpm-ls2/
Gear accordingly. Also,still give me the single plane:as a future reference for a stroker. I'm not a big fan of TQ and I also understand, that this is what you feel in the seat of your pants but we can gear a vehicle to place the rpm band where it is needed effectively giving you that feeling of pressing someone back in there seats.
All is dependent on what is wanted. Lower or upper: Hp & Tq. Gearing helps to offset this with either combo.
Last edited by Wasabi; Jun 23, 2016 at 06:21 PM.
Its really all about what you want out of your car. The OP stated that he wants a street car with a wide torque band. He also said he wants about as much power as he can squeeze out of the combo. based on my past experience, The dual plane/ short duration/tight LSA combo has the unique ability to give you both. Can you go quicker with a single plane/ big nasty cam combo? YUP ! But... the price you pay is that first thing the OP stated he was building... a street car. Can you drive a big nasty combo? YUP ! but it gets old pretty fast if you go far on that cruise. I could drive my combo down the highway at 1700 rpms, pulling down 20+ mpg and still show a compromised big cam /single plane setup my tail lights. You can go fast and still have a driver if you play those big port heads right on a stock cube LS.
Why does it sound like more fun? Bigger numbers in the description? What is a Super Vic jr anyway?
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Victor Jr. btw: Super is for the Super Victor my mistake.
Not that the bigger number is better but the point at which peak tq is occurred. You had a 3.42 gear and a 2800 stall. So you would Need TQ with it being 3500 lbs and the gearing chosen. Same combo with a Vic Jr and slightly larger rear gear *3.73-3.91 and more stall 3200 to 3600 @ 3500 lbs. Still sounds reasonable for cruising with a auto 4 spd to me. What are the times then for a guess? I understand he wants all around TQ. But most of the guy's around here could get away with less TQ as you can gear it to think it has that extra 30 foot pounds of TQ. And not having to control a car that Tends to break lose because of that TQ.
Not trying to argue but place options out there.
Not that the bigger number is better but the point at which peak tq is occurred. You had a 3.42 gear and a 2800 stall. So you would Need TQ with it being 3500 lbs and the gearing chosen. Same combo with a Vic Jr and slightly larger rear gear *3.73-3.91 and more stall 3200 to 3600 @ 3500 lbs. Still sounds reasonable for cruising with a auto 4 spd to me. What are the times then for a guess? I understand he wants all around TQ. But most of the guy's around here could get away with less TQ as you can gear it to think it has that extra 30 foot pounds of TQ. And not having to control a car that Tends to break lose because of that TQ.
Not trying to argue but place options out there.
Last edited by Wasabi; Jun 23, 2016 at 11:18 PM.
Victor Jr. btw: Super is for the Super Victor my mistake.
Not that the bigger number is better but the point at which peak tq is occurred. You had a 3.42 gear and a 2800 stall. So you would Need TQ with it being 3500 lbs and the gearing chosen. Same combo with a Vic Jr and slightly larger rear gear *3.73-3.91 and more stall 3200 to 3600 @ 3500 lbs. Still sounds reasonable for cruising with a auto 4 spd to me. What are the times then for a guess? I understand he wants all around TQ. But most of the guy's around here could get away with less TQ as you can gear it to think it has that extra 30 foot pounds of TQ. And not having to control a car that Tends to break lose because of that TQ.
Not trying to argue but place options out there.
Not that the bigger number is better but the point at which peak tq is occurred. You had a 3.42 gear and a 2800 stall. So you would Need TQ with it being 3500 lbs and the gearing chosen. Same combo with a Vic Jr and slightly larger rear gear *3.73-3.91 and more stall 3200 to 3600 @ 3500 lbs. Still sounds reasonable for cruising with a auto 4 spd to me. What are the times then for a guess? I understand he wants all around TQ. But most of the guy's around here could get away with less TQ as you can gear it to think it has that extra 30 foot pounds of TQ. And not having to control a car that Tends to break lose because of that TQ.
Not trying to argue but place options out there.
