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Username Post: Gen.VI 454 build        (Topic#346505)
Am4wag 
Forum Newbie
Posts: 87

Reg: 11-19-15
08-10-17 10:50 AM - Post#2703657    

I have a Gen.VI 454 block,along with a forged rotating assy. from a 502.Got a new set of assembled Chevy Performance aluminum oval port heads with 2.19/1.88 valves.Currently the block is in the m/s getting the normal once over,along with the crank and rods getting balanced.All the other stuff to complete this engine will have to be bought.I would like some input on what pistons to use,carb.,manifold,cam combos.This is going in a '69 El Camino with TH400/2000 stall,and 12 bolt posi.with 3:42's.Wanting something stout for the street.

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: 17110
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
08-10-17 11:54 AM - Post#2703663    
    In response to Am4wag

how can you balance the crank and rods without the pistons?

a "TH400/2000 stall,and 12 bolt posi.with 3:42's."
and that forged crank and rods and Gen.VI 454 block,with the correct pistons will make a 454-468 displacement depending on the bore size

and your desire to drive on the street (assuming pump gas) would have me looking for 9.5:1-10:1 pistons , to maximize torque but not get into detonation issues as long as you use premium octane fuel
and a fairly mild hydraulic roller cam.
be very sure you explain what year block and what cylinder heads will be used as there are differences in the cams. a mark VI cam is different from a MARK IV cam

crane (386)310-4875

crower 619.661.6477

erson 800-641-7920

lunati..662-892-1500

ISKY 323.770.0930

clay smith 714-523-0530

herbert cams 714-491 -2267
while ID sure call and talk to the tech departments on at least 5 suppliers I think youll find something like this meets your needs

http://www.claysmithcams.com/bbc-454-to-470-cid-wi ...



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
08-13-17 04:27 AM - Post#2703969    
    In response to grumpyvette

That Clay Smith cam is the first cam I've seen expressly for my heads and has some appealing numbers,yet I notice a lower LSA number and more lift than other "suggested" cams.Is the lower LSA number a "secret ingredient"?I also see that they offer 2 different versions of this cam. http://www.claysmithcams.com/bbc-454-to-470-cid-wi ... and http://www.claysmithcams.com/bbc-454-to-470-cid-wi ... called Competition Cams and they suggested this cam according to my stall, http://www.compcams.com/Company/CC/cam-specs/ Detai... the zz454 crate engine uses this cam: https://www.summitracing.com/parts/nal-24502611

Am I premature in looking for a cam before I get pistons,or should I get pistons first to get my 9.5/10 to 1 compression and then narrow down a cam selection ?

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 08-13-17 04:32 AM. Reason for edit: No reason given.

 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17110
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
08-13-17 05:36 AM - Post#2703974    
    In response to Am4wag

that comp cam is designed to work with most stock un-touched,
but carefully clearance checked,
later oval port style heads its not a bad choice but there are better ones.
your drive train gearing and converter stall speed, car weight etc. all factor into cam selection.

http://www.compcams.com/Company/CC/cam-specs/ Detai...

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!!


Edited by grumpyvette on 08-13-17 06:31 AM. Reason for edit: No reason given.

 
Am4wag 
Forum Newbie
Posts: 87

Reg: 11-19-15
08-15-17 09:55 AM - Post#2704322    
    In response to grumpyvette

http://www.claysmithcams.com/bbc-454-to-470-cid-wi ...

Is'nt the tigher LSA of 107 going to be a little "ignorant" at idle?Not that I am dissing this cam,just trying to imagine this cam's behavior/characteristics.


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: 17110
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
08-15-17 11:13 AM - Post#2704343    
    In response to Am4wag

tighter LSA will tend to idle a bit more noticeably with a slightly increased lope
but it also allows a lower duration cam too breath more efficiently
http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

your desire to drive on the street (assuming pump gas) would have me looking for 9.5:1-10:1 pistons , to maximize torque but not get into detonation issues as long as you use premium octane fuel
and a fairly mild hydraulic roller cam.
be very sure you explain what year block and what cylinder heads will be used as there are differences in the cams. a mark VI cam is different from a MARK IV cam

crane (386)310-4875

crower 619.661.6477

erson 800-641-7920

lunati..662-892-1500

ISKY 323.770.0930

clay smith 714-523-0530

herbert cams 714-491 -2267
while ID sure call and talk to the tech departments on at least 5 suppliers

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
08-17-17 12:38 AM - Post#2704538    
    In response to grumpyvette

Looking for pistons to get me in the 9.5-10 cr range,found these:

http://www.jepistons.com/Catalogs/SRP/Chevy_BB /sma...

Problem-I don't see a listing for stock?4.25" bore.I did however find these:

http://www.jegs.com/i/United-Engine-Machi ne/648/IC...
I'm a bit leary now that I'm discovering that these heads (same as the eddy rpm-0's ?)require "their own kind of piston" (?) due to the sparkplug hole being relocated.


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: 17110
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
10-24-17 03:20 AM - Post#2711911    
    In response to Am4wag

talk too the piston manufacturers about your particular combo, most will be well aware of issues dealing with clearances while using different cylinder heads and can either suggest a matching design piston or provide custom clearance work on an ordered set of pistons for usually a nominal cost

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

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
10-24-17 06:37 AM - Post#2711937    
    In response to grumpyvette

A company called Racetech produced pistons for these heads as per my machinist.Rated at 10.2 cr.and 1/16" ring pack.Finally able to move on with this engine.I selected a Crower cam complete with full roller rockers and lifters.
https://www.crower.com/camshafts/chevy-396-4 54-hyd...

Got a Weiand Stealth intake,Holley 770 Street Avenger,and scored some Hooker Super Comp.headers with 2" tubes.I feel I will be breathing.My next big ticket items will be belt/pulley set up,proper stall TC,and ignition (I really like those D.U.I. hei's).The machine work I suspect will be finished this week.
Really appreciate all the input from Grumpy and (versed) others.

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: 17110
grumpyvette
Age: 69
Loc: FLORIDA USA
Reg: 03-16-01
10-31-17 11:12 AM - Post#2712832    
    In response to Am4wag

let us know how it runs once you get it together and correctly tuned up and tested

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
10-31-17 04:10 PM - Post#2712870    
    In response to grumpyvette

I certainly will Grumpy.I read a lot of your info and threads,overfilling my head with solutions and conclusions,which really help in selecting the components.I hope to start assembling next week.In the mean time,I'm still deciding on a torque converter,ignition,etc.

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


 
Am4wag 
Forum Newbie
Posts: 87

Reg: 11-19-15
12-28-17 06:11 PM - Post#2719271    
    In response to Am4wag

I am waiting on a ring filer I bought to come in.Did manage to finally get everything out of the m/s.Got the crank planted with .003" clearance on the mains and .004" of endplay.Checked fitment of new Moroso pan as well as clearancing the p/u tube on the oil pump.A couple of questions have arisen though.I have this gasket set which contains the o-ring that goes under the rear main/thrust cap.
https://www.summitracing.com/parts/fel-cs8523
2 of the 4 O-rings in a separate wrapping in the set fit the recess.One is brown and thin(ner),the other is fat(ter) and is red(dish).Which one is used in this app.Other question concerns the rear seal.Once the rear cap is on and torqued,I'm assuming I could go on and get the rear seal in.Does it need to be bedded with any type of sealant?


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 12-28-17 06:12 PM. Reason for edit: No reason given.

 




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