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robins44
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Joined: 29 Dec 2007
Posts: 632

18797.16 points



PostPosted: Mon Jul 04, 2016 9:39 pm    Post subject: Carb suggestion Reply with quote

383 stroker

Dart pro 1 platinum 230cc heads 64cc

Rpm air gap intake port matched

Howards solid roller 111163-08 .600 .620

Harland sharp 1.5 aluminium roller rockers

All forged bottom srp pistons

Plans to spray 150

Got cheater plate on bottom open 1 inch spacer on top

Should i run the 850 holley dp thats on it now, or throw my 770 holley vacumme street avenger on it?

P.s. i know heads are massive, runs sweet though

Thanks Cody
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robins44
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PostPosted: Mon Jul 04, 2016 10:09 pm    Post subject: Reply with quote

Compression should be about 11 to 1

Hooker long tube 1" 3/4 through stainless 3 inch flowmaster 44s dual with h pipe
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Big Dave
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Location: Tampa Florida
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PostPosted: Wed Jul 06, 2016 8:42 am    Post subject: Reply with quote

Holley 4150 series use a 750 cfm for the street, 950 cfm for the strip.

Big Dave
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Paul P
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Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Fri Jul 15, 2016 3:02 pm    Post subject: Reply with quote

830 cfm annular booster race carb is nice too for this application and you wouldn't have to get 2 carbs.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
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Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Fri Jul 15, 2016 7:28 pm    Post subject: Reply with quote

i agree with Paul however, if you already have the 850, i would run that. might need a little extra pump shot to compensate for the big carb but YOU ALREADY HAVE IT.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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robins44
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18797.16 points



PostPosted: Wed Jul 20, 2016 5:08 pm    Post subject: Reply with quote

I put my 770 vacumme street avenger on it and its really happy with that carb. Idles great and more power everywhere.

The 850 on the other hand idled at 1300 out of gear and would idle at 900 and struggle with me peddaling it in gear. No vauccme for brakes. The throttle plates were drilled by previous owner which i thought would help. But even with them drilled the idke air screws for primary metering block worked best at 3 turns out. Not sure if the carb is dirty from setting or what.
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Paul P
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Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Fri Jul 22, 2016 2:20 pm    Post subject: Reply with quote

Sounds to me like too much air is getting into the motor. Holes in the throttle plates are not necessary for an 850 carb. There is a secondary screw that is accessible from the underside of the carb for cracking the secondaries open slightly to allow the primaries to be closed enough to keep the curb idle slots from being exposed. If you can plug the holes with solder and use the method I described I be it would idle down for you where you want it.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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robins44
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Joined: 29 Dec 2007
Posts: 632

18797.16 points



PostPosted: Sat Jul 23, 2016 3:47 pm    Post subject: Reply with quote

I looked for the screw your talking about, but had no luck. Im pretty pleased with the 770 right now, and may off the 850. Off topic but the motor has isky redzone max endurance lifters in it. How long can i resonably expect these to live on the street? Obviously ill keep up on the lash, i run brad penn 20w50, and i try not to idle it too bad. But i am considering tearing it down and freshining it up this winter (rear mains leaking). Was thinking about getting some isky ez rolls bearingless lifters, that way when one does fail ill only kill a cam and lifter instead of needle bearings throughout.

Loaded question i know
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Paul P
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Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Mon Jul 25, 2016 4:51 pm    Post subject: Reply with quote

You Tube. It has to be there.

https://www.youtube.com/watch?v=b8ROjrGAH2I

If not that is very odd.

Paul

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
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Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Fri Jul 29, 2016 10:59 pm    Post subject: Reply with quote

Paul is right, the screw is there. you have to have the carb off and upside down to see it.

im curious, why such thick oil? we run clearances big enough to throw a cat through on the Olds and i still run a 10/30 to 10/40. thicker oil = more power to run the pump for little to no gain.

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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
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Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Sat Jul 30, 2016 12:25 pm    Post subject: Reply with quote

Hi Keith,
I still run that 20w50 oil can't get away from the fact that I lost a cam bearing due to that no zinc oil. skiddish I guess.

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Sat Jul 30, 2016 6:09 pm    Post subject: Reply with quote

oh yeah, gotta have the zinc. we started using this in everything...
http://www.schaefferoil.com/
lots of zinc and they can even custom make an oil that is application specific. they also have an additive to dump into whatever other oil you might want to use.

_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Sat Jul 30, 2016 6:56 pm    Post subject: Reply with quote

10sec.et wrote:
oh yeah, gotta have the zinc. we started using this in everything...
http://www.schaefferoil.com/
lots of zinc and they can even custom make an oil that is application specific. they also have an additive to dump into whatever other oil you might want to use.


Yeah I am using the Joe Gibbs stuff but still in the 20w50 weight.

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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robins44
Member


Joined: 29 Dec 2007
Posts: 632

18797.16 points



PostPosted: Wed Aug 03, 2016 10:02 pm    Post subject: Reply with quote

Quick question about timing, running 36 degreees total now, seems to run good. Previous owner said ran 36 as well, plugs looked great. Should i turn it back to 32 or so, i run 91 or 93 pump. What do you guys think with the cam thats in it? Should be 11 to 1 static with srp forged pistons.
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Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Thu Aug 04, 2016 8:44 am    Post subject: Reply with quote

You would have to plug that cam into the DCR calculator to know how much you can push it. I remember that my old 406 could take half race and half pump gas without any issues DCR was around 10.3 I think?
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
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