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Username Post: BBC induction        (Topic#347631)
Am4wag 
Forum Newbie
Posts: 87

Reg: 11-19-15
10-11-17 03:45 PM - Post#2710569    

454,.030 over,10.2cr,4"stroke,roller cam @.050 is (in.ex.)
222/229 with .544/.560 lift-110 lobe separation.Heads are aluminum Bowtie oval port,290cfm,110cc chambers,2.19/1.88 valves.,rockers are 1.7 .
Car is '69 El Camino,TH400,3.42 12 bolt rear running 28"(roughly)dia.15"rear tires.Current stall is 2000,but I have a feeling I'll need more,or go back to manual trans.Advice on a stall speed would be cool.
Looking around for an intake carb combo that will work with this engine.I feel 750-800cfm is about right,but there are "a million" of them out there.As far as intake,been really looking(and like) the Weiand Stealth.I'm open to any and all advice.


The bearer of gossip is a small untrustworthy person who takes delight in someone else's problems. Avoid them.
Let's all make the day count. - Charlie Daniels


 




grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17111
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
10-13-17 02:38 PM - Post#2710760    
    In response to Am4wag

a higher stall converter would help, with that cam I,d suggest a 2600rpm stall,
your surely in dual plane intake rpm range
(be sure to verify how much hood clearance you have before ordering parts)
and a 750 cfm vacuum secondary would work

theres always a strong tendency to over do things and try to use parts more suited to racing,
you'll be much happier if you don,t go down that route,
yes a single plane intake will also work,
but you'll generally give up more low and mid rpm torque,
if you have the hood clearance (and that needs to be checked before you order parts,) Id go high rise, dual plane intake
and take the suggested components that match your application,
as they will provide brisk performance with decent reliability.
don,t forget youll need decent headers and a low restriction exhaust are required,
to maximize intake flow and allow the engine to breath.
why not call and ask the tech guys at holley their opinion also
Id be looking for a vacuum secondary electric choke 750 cfm,
but a properly set up manual secondary carb would work.




HOLLEY
https://www.holley.com/support/carburetor/

https://www.holley.com/products/fuel_systems /carbu...

https://www.summitracing.com/parts/hly-0-3310c

https://shop.advanceautoparts.com/p/edelbrock-rpm-...

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 
Am4wag 
Forum Newbie
Posts: 87

Reg: 11-19-15
10-13-17 09:05 PM - Post#2710800    
    In response to grumpyvette

I did contact Holley,and they're response today was a 770 Street Avenger.I tend to think (from what info from charts and so on) that's in the range my engine needs..Hmm,750's (Q-jets) have been on stock 454's for a long time as well as a lot of SBC's.Does the presence of a high rise intake tend to,lets say enhance the 750 (range) so that it IS suffice/accurate for a setup such as mine (more cam,head flow,etc. than stock) ?

The bearer of gossip is a small untrustworthy person who takes delight in someone else's problems. Avoid them.
Let's all make the day count. - Charlie Daniels


Edited by Am4wag on 10-13-17 09:08 PM. Reason for edit: No reason given.

 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17111
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
10-14-17 04:51 AM - Post#2710815    
    In response to Am4wag

if you have the hood clearance required, the high rise style dual plane intake like the one linked too above tends to add several hundred rpm over the stock intake and noticeably better torque over most of that operational rpm range

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 
66cayne 
Valued Contributor
Posts: 2697

Reg: 08-06-08
10-15-17 04:32 AM - Post#2710902    
    In response to Am4wag

The Stealth is a great dual plane BBC manifold. Based on your cam specs it should perform well. I would use a Holley 750 vacuum secondary with a jet style secondary metering block. It will provide all the flow you need to 6000 rpm or so and thats more than your cam and heads are going to require.



 
Am4wag 
Forum Newbie
Posts: 87

Reg: 11-19-15
10-17-17 06:26 AM - Post#2711128    
    In response to 66cayne

It's getting down to deciding which carb.I'm really wanting something CLOSE out of the box.I have practically no experience with Holley except one started a fire once (luckily I had a fire extinguisher handy).I've had a couple of Eddys and a Street Demon,and had pretty good luck with them.All street use.There's a million different carbs in the 700-800 range.

The bearer of gossip is a small untrustworthy person who takes delight in someone else's problems. Avoid them.
Let's all make the day count. - Charlie Daniels


 




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