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Search found 46 matches

by ChevelleNut
Tue May 04, 2021 7:26 pm
Forum: Engine Tech
Topic: New Holley 80577 950HP Supercharger carb question
Replies: 8
Views: 360

Re: New Holley 80577 950HP Supercharger carb question

The PVCR size may be different +/- relative to the PVCR size used in a N/A carb application.. Main emulsion jets sizes and main AB's sizes may be different.. Depending if the blower carb is intended for 2x4 use on a blower or as a single carb the idle circuit fuel metering sizes might be different....
by ChevelleNut
Thu Apr 29, 2021 8:28 pm
Forum: Engine Tech
Topic: New Holley 80577 950HP Supercharger carb question
Replies: 8
Views: 360

New Holley 80577 950HP Supercharger carb question

As the title reads, I've got a brand new 950HP Supercharger carburetor. I know it has different power valves than a standard 950HP, but what else is different? What would have to be changed to convert it to a standard, non boost referenced carburetor?
by ChevelleNut
Wed Apr 14, 2021 10:37 pm
Forum: Offtopic Forum
Topic: rant: why do people call iron heads steel heads?
Replies: 39
Views: 6731

Re: rant: why do people call iron heads steel heads?

I've never heard anyone call them steel heads.
by ChevelleNut
Wed Apr 14, 2021 10:37 pm
Forum: Offtopic Forum
Topic: rant: why do people call iron heads steel heads?
Replies: 39
Views: 6731

Re: rant: why do people call iron heads steel heads?

dave brode wrote: Tue Feb 17, 2015 10:52 am On that subject, aren't "billets" actually a casting? So, if true, doesn't a billet crank start from a casting?
No. Billets are machined from a solid chunk of material.
by ChevelleNut
Wed Apr 14, 2021 1:38 am
Forum: Engine Tech
Topic: Change of plans... Does it call for a change of heads?
Replies: 6
Views: 466

Re: Change of plans... Does it call for a change of heads?

As you probably know hooking up that cid motor on the street even with those size rear tires will not really take place when using either set of the heads your considering. Also seeing as your going thru the trouble of running a over drive I would try to make the 270 cc heads the ones you get on th...
by ChevelleNut
Wed Apr 14, 2021 1:33 am
Forum: Engine Tech
Topic: Change of plans... Does it call for a change of heads?
Replies: 6
Views: 466

Re: Change of plans... Does it call for a change of heads?

rustbucket79 wrote: Tue Apr 13, 2021 10:45 pm The way I see it you’re trading in the neighborhood of 40/50 lb ft for the same amount of horsepower, take your pick.
That's kind of what I'm thinking. The flow numbers are the same on both sets of heads. I was thinking that with the 270's the port velocity would be better and not as lazy.
by ChevelleNut
Tue Apr 13, 2021 7:14 am
Forum: Engine Tech
Topic: Change of plans... Does it call for a change of heads?
Replies: 6
Views: 466

Change of plans... Does it call for a change of heads?

Alright, I've had a change of plans. I have all of the stuff to build a 12.5:1 489 BBC for my bracket car, but I've since decided that I'm going to install my 396 in the car and sell it. I'm still going to build the 489, but drop the compression to 10:5.1 and put it where the 427 sits in my street c...
by ChevelleNut
Sun Jan 03, 2021 6:48 am
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

Any idea what rpm you will turn through the lights with 28" tyre and 4.1s?? Lunati cam might be a bit big but why not try it ?? What stick did DV recommend?? I don't have a clue to be honest. It's a complete new build. From a longevity standpoint, the cam I had ground for it makes more sense. Less ...
by ChevelleNut
Sun Jan 03, 2021 2:27 am
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

As far as the cam goes, I gave a cam manufacturer all of my info after I figured out how I wanted to build it. He ground the cam that I currently have, for my combo. He asked me how many RPM I was looking to turn it, I told him 6,800 - 7,000 max. If I put a larger cam in it, it's just going to run m...
by ChevelleNut
Tue Dec 29, 2020 7:19 pm
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

David Vizard wrote: Fri Dec 11, 2020 12:56 am You may have made a middle of the road choice of heads. Don't compound it with an incorrectly specced cam.

Post some pics of the heads and the flow numbers and valve sizes and I will spec a cam for you.
DV
Bump for David
by ChevelleNut
Fri Dec 11, 2020 2:15 pm
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

You need some more cam with those new heads. You may need like others have said over .700 lift. PM me I have a really nice low use Lunati I am not using and need a smaller one for another project, make you a swap. I appreciate the offer, but I'm going to keep my cam. I've got a new, bigger Lunati s...
by ChevelleNut
Fri Dec 11, 2020 2:09 pm
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

What did you run at the track with the old engine combo and the new setup? It's getting a whole re work, front to back. I honestly can't remember what it ran. Last engine it had in it that went down the track was a 396. It was my dad's car. He pulled the 396 and installed a 427, but was never able ...
by ChevelleNut
Fri Dec 11, 2020 8:27 am
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

You may have made a middle of the road choice of heads. Don't compound it with an incorrectly specced cam. Post some pics of the heads and the flow numbers and valve sizes and I will spec a cam for you. DV Thank you, Mr Vizard. Here are the heads..... Brodix Race Rite 26° Rectangle port 312cc runne...
by ChevelleNut
Thu Dec 10, 2020 12:28 am
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

MT Jeff wrote: Wed Dec 09, 2020 10:47 pm Does the car have a cage in it? Once you go 9.99 things change. Keep that in mind.
6 pt roll bar
by ChevelleNut
Wed Dec 09, 2020 1:08 am
Forum: Engine Tech
Topic: Did I chose the wrong heads?
Replies: 34
Views: 2363

Re: Did I chose the wrong heads?

rustbucket79 wrote: Tue Dec 08, 2020 10:59 pm Have you considered going right to the source for information? Since you’re their customer either way, I’m certain they would want you matched up with their best option, and have real world results.
I want to do a little bench racing.