Re: 495 bb solid flat tappet Nitrous cam recomendation
[Re: Wicked49670dart]
#1794078
04/02/15 03:42 AM
04/02/15 03:42 AM
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Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
MoparBilly
master
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master
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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Hughes will grind any of their cams on a wider lobe center.
My old 440 had Eddie Rpm's, and a 304/640 Ultradyne flat tappet. Ten teens on motor typically in a 2850 lb car, with a glide, and 4.56s. 9.60's on a 225 hit. 8.96-146 with a second 200 stacked on top, had to go to 4.30 gears to get to 149 mph. It was not a particularly efficient cam on Nitrous!
My brother's Gremlin has a 440 with Indy SR heads and a howards flat tappet 272@ .50, 639 lift on a 108, and he's been 8.95 at 3000 lbs, but spraying a ton. 4.56's and a glide, and the gear really hurts him.
My first recommendation would be, a tight aggressive 9" or bigger convertor, and 4.30 or 4.10 gear, that will be more important than the nuances of a flat tappet cam.
"Livin' in a powder keg and givin' off sparks"
4 Street cars, 5 Race engines
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Re: 495 bb solid flat tappet Nitrous cam recomendation
[Re: RockChip]
#1794079
04/02/15 10:22 AM
04/02/15 10:22 AM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
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Quote:
I've been looking for a cam that has a wider lsa but I'm coming up with nothing.
Nobody must run nitrous on their Mopars anymore!
That's why you don't run an off the shelf cam. Just b/c it isn't in the Jeg's catalog doesn't mean it isn't available.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 495 bb solid flat tappet Nitrous cam recomendation
[Re: Wicked49670dart]
#1794081
04/02/15 02:45 PM
04/02/15 02:45 PM
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Joined: Feb 2003
Posts: 484
The State of Hockey
2qik4u
mopar
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mopar
Joined: Feb 2003
Posts: 484
The State of Hockey
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Quote:
On my 496 my Hughes cam is installed at 105 degrees and 108 degree lobe separation. I have sprayed 200 shot so far and I will be spraying 300 shot next time out. I do drive this on the street occasionally, with a cam with a higher lobe separation I would think the motor might be a little more lazy when not spraying. If this was a dedicated Nitrous motor then I would choose a Nitrous cam. My motor is apart now and getting freshened up. I"m going to make a cam change after getting my heads back from Fastlane Machine and seeing what they flow. What is your plan for your motor? Nitrous only? Matt
When thinking about a nitrous street/strip motor consider do you want to maximize performance when on the spray? If you choose a cam designed to maximize performance naturally aspirated you compromise performance on the button. Personally when I'm driving the car on the street I'm not racing so I'm OK trading naturally aspirated power for an overall faster car on the button. 
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Re: 495 bb solid flat tappet Nitrous cam recomendation
[Re: RockChip]
#1794082
04/02/15 04:08 PM
04/02/15 04:08 PM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Quote:
495ci 400 block
Cnc edelbrock RPM heads 305/259@.700
Victor 4150 with 4500 adapter
1090 king Demon
13 to 1
2800 lbs
727 with brake.
4.56
33/14 slick.
Spraying 250+
What solid flat tappet might work with this combination?
Weight, tire, compression and gear, looks like a track car. It he wants it to run best on spray, it needs the right cam. An "in between" cam will be a compromise in both areas. All depends on what you want. Something with a short LSA will generally have more overlap and more cylinder pressure as well. Pressure will make it timing sensitive and too much overlap will blow part of a large dose of spray out the pipes. Now before it starts, I realize that JUST a longer LSA doesn't "fix" things........but, when you get the opening and closing numbers where they NEED to be, to be effective, longer LSA comes with that and getting those numbers is a problem with limited blanks
Monte
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Re: 495 bb solid flat tappet Nitrous cam recomendation
[Re: RockChip]
#1797951
04/07/15 10:36 PM
04/07/15 10:36 PM
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Joined: Jan 2009
Posts: 294
Minnesota
RockChip
OP
enthusiast
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OP
enthusiast
Joined: Jan 2009
Posts: 294
Minnesota
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Thanks Monte for commenting even though I pm ya on YB.
I don't have his card handy but his old cam was 288/298 .639/.649 on a 110.... I think
I'm thinking of having Comp grind another one but on a 112
Last edited by RockChip; 04/07/15 10:37 PM.
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