What cam would you use?
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Car: 1991 Z28
Engine: 350 TPI RAMJET COMING
Transmission: T56
What cam would you use?
For a Ram-Jet ? .030 flat-top, worked vortecs, Hooker LongTubes, T56, 3.42 gear? I want decent street manners, but some top-end also. Slight choppy idle ok..........I have several cams here......can't decide. Suggestions?
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Car: 92' RS Camaro
Engine: L98
Transmission: 700R4
ZZ9
LPE 219
or similar grinds from Comp. (= Cheaper)
With that Ramjet if you port those heads and your bottom end is up for it try the CC306 .
LPE 219
or similar grinds from Comp. (= Cheaper)
With that Ramjet if you port those heads and your bottom end is up for it try the CC306 .
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Car: 1991 Z28
Engine: 350 TPI RAMJET COMING
Transmission: T56
I've got a Gm "846" sitting here...............Just wonder how soft it would be until 2,000 rpm's? I could do 4.10 gears if I had too. But in my experience I would be shifting all the time(with the T56).
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Car: 1991 Z28
Engine: 350 TPI RAMJET COMING
Transmission: T56
Anybody else? I mean really one person? There is not a lot of people trying this intake, but any educated guesses would be appericated.
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Something around 218 degrees on the intake side. It will give you some lope. I would look at the Comp Cams Xtreme line.
I don't see any heads listed. IMHO that is the most important choice. If you have good flowing heads on both the intake and exhaust you can go with a single pattern cam such as the LP219. Otherwise a dual pattern would be better. Allen
I don't see any heads listed. IMHO that is the most important choice. If you have good flowing heads on both the intake and exhaust you can go with a single pattern cam such as the LP219. Otherwise a dual pattern would be better. Allen
Last edited by 1989GTATransAm; 04-10-2005 at 08:52 PM.
#7
"worked vortecs" count as heads right?
what are the specs on the '846'? I know the GM 847 is pretty aggressive, moreso than the CC306 which would probably be the most extreme cam on my list if i wanted "decent street manners". I think the LT4 hot cam would be a good compromise, or for a bit more top end, a COMP CC503 grind (CCA-07-503) with some 1.6 rockers
what are the specs on the '846'? I know the GM 847 is pretty aggressive, moreso than the CC306 which would probably be the most extreme cam on my list if i wanted "decent street manners". I think the LT4 hot cam would be a good compromise, or for a bit more top end, a COMP CC503 grind (CCA-07-503) with some 1.6 rockers
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Car: 89 Formula
Engine: 355
Transmission: 700r4
Axle/Gears: 3.73
Originally posted by APACHE JOHN
Oh and the "846" cam is 222/230 @.050 .509/.528 on a 112 center.
Oh and the "846" cam is 222/230 @.050 .509/.528 on a 112 center.
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Car: 91 GTA
Engine: 377ci
Transmission: T56
Axle/Gears: QP Ford 9" 3.70s
XM262H It doesn't look all that impressive on paper, but it will make the vortec and ramjet intake stand up and say hello. The throttle response is almost on the verge of telepathic, and a monkey with no hands can tune it in. just my two cents.
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Car: 1991 Z28
Engine: 350 TPI RAMJET COMING
Transmission: T56
Originally posted by DAVECS1
XM262H It doesn't look all that impressive on paper, but it will make the vortec and ramjet intake stand up and say hello. The throttle response is almost on the verge of telepathic, and a monkey with no hands can tune it in. just my two cents.
XM262H It doesn't look all that impressive on paper, but it will make the vortec and ramjet intake stand up and say hello. The throttle response is almost on the verge of telepathic, and a monkey with no hands can tune it in. just my two cents.
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Car: 1991 Z28
Engine: 350 TPI RAMJET COMING
Transmission: T56
Ok just found the specs. It's a flat tappet marine cam no thanks. I've still got a Tuned-Port Corvette if I want all low-end torque. Hot-Cam is looking betteror Maybe a "845".
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Car: 91 GTA
Engine: 377ci
Transmission: T56
Axle/Gears: QP Ford 9" 3.70s
Well i ment to select the marine cam, but not the flat tappet. I guess i do not have the catalog memorized totally yet. At any rate the two choices I would go with for roller are the XM270HR or the XR264HR. These will give you lots of lift with a sensible duration, this works well with multiport and particularly well with vortec heads. I have built a number of vortec motors with these cams, and I stand by the throttle response comment it is unbelieveable. Sounds extremely mean when you lean on the pedal. One thing to watchout for though is the valves hitting the pistons. These cams have extremely fast ramps. Sorry for the confusion. Sounds like whatever you choose it is going to be a good combo.
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Car: 1989 Trans Am
Engine: 355 HSR
Transmission: Pro-Built 700r4 w/ 3400 converter
Axle/Gears: 10 bolt w/ 3.42 gears
IMO go bigger. I say at least a 224 duration on the intake side w/ it but thats just me. The 847 is a great cam. Great for the short runner setups...
why is everyone so worried about power under 2k. You will have plenty for every day driving, more than needed under 2k in a 350. Its over the 2-3k mark that you want the power for racing. Torque is great, and its cool to have. But moving the power up in the band is what makes you go faster. That is what a bigger cam does. You move it up in the band and make it more useful in racing... Under 2k You would never see it...
why is everyone so worried about power under 2k. You will have plenty for every day driving, more than needed under 2k in a 350. Its over the 2-3k mark that you want the power for racing. Torque is great, and its cool to have. But moving the power up in the band is what makes you go faster. That is what a bigger cam does. You move it up in the band and make it more useful in racing... Under 2k You would never see it...
#16
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12370845 Hydraulic roller design I:214 E:224 I:488" E:509" 112
12370846 Hydraulic roller design I:222 E:230 I:509" E:528" 112
12370847 Hydraulic roller design I:234 E:242 I:539" E:558 112
The CC306 is considered to be an "old" design cam and the 847 is supposed to be better and newer. Those threee are GM/Crane cams. I believe that GM and Crane have a close relationship and Crane makes those three, something like that. Stick with the '846 or "Hot" cam. The LPE 219/219 is a good cam that can act like it is a bigger. Or you could go to a solid roller....
12370846 Hydraulic roller design I:222 E:230 I:509" E:528" 112
12370847 Hydraulic roller design I:234 E:242 I:539" E:558 112
The CC306 is considered to be an "old" design cam and the 847 is supposed to be better and newer. Those threee are GM/Crane cams. I believe that GM and Crane have a close relationship and Crane makes those three, something like that. Stick with the '846 or "Hot" cam. The LPE 219/219 is a good cam that can act like it is a bigger. Or you could go to a solid roller....
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Car: 91 GTA
Engine: 377ci
Transmission: T56
Axle/Gears: QP Ford 9" 3.70s
. I am by no means a cam expert and I am sincerely asking this question so please do not take it the wrong way. What do you guys consider a big cam? Are you going by the duration numbers or are you looking at the lift? I consider the LPE grind pretty healthy with over .510 lift on each side.
in my own personal experience tuning multiport fuel injection, I have had better results going with less duration and more lift, maybe I am short changing myself
"why is everyone so worried about power under 2k. You will have plenty for every day driving, more than needed under 2k in a 350. Its over the 2-3k mark that you want the power for racing. Torque is great, and its cool to have. But moving the power up in the band is what makes you go faster. That is what a bigger cam does. You move it up in the band and make it more useful in racing... Under 2k You would never see it..."
"The LPE 219/219 is a good cam that can act like it is a bigger. Or you could go to a solid roller...."
in my own personal experience tuning multiport fuel injection, I have had better results going with less duration and more lift, maybe I am short changing myself
Last edited by DAVECS1; 04-12-2005 at 09:07 AM.
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Car: 1991 Z28
Engine: 350 TPI RAMJET COMING
Transmission: T56
Well if you don't gain a whole but loose alot of street manners. Then I guess it's best to error on the small side. At least that's what I've always heard. This won't be my daily driver, but I plan on enjoying it quite abit. I would like a sound that isn't stock, but not get followed by the police. I want more of a topend than TPI. Which I think the Ram-Jet Intake will help with. I also don't want to leave alot on the table by selecting too small a camshaft. I guess I'll use a two-piece timing cover. Just in case I don't like my first choice.
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Originally posted by DAVECS1
.
I am by no means a cam expert and I am sincerely asking this question so please do not take it the wrong way. What do you guys consider a big cam? Are you going by the duration numbers or are you looking at the lift? I consider the LPE grind pretty healthy with over .510 lift on each side.
in my own personal experience tuning multiport fuel injection, I have had better results going with less duration and more lift, maybe I am short changing myself
.
I am by no means a cam expert and I am sincerely asking this question so please do not take it the wrong way. What do you guys consider a big cam? Are you going by the duration numbers or are you looking at the lift? I consider the LPE grind pretty healthy with over .510 lift on each side.
in my own personal experience tuning multiport fuel injection, I have had better results going with less duration and more lift, maybe I am short changing myself
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