1983cameroman

.040 over 350 flat tops 492 heads torkertwo cam torker intake 3310 holley 13/4 tube headers give me your opinions

Guest

The Torker intake gets a lot of well-deserved bashing. If you have one, the reason for running it is the cost. But a Performer RPM will beat it at anything and everything else. The Torker cam is nearly a single pattern, and those 492 heads will do better with a dual pattern, whether they're 1.94 / 1.50 or 2.02/1.60, whether ported or not.
I'd look at this: http://www.compcams.com/Company/CC/c...x?csid=97&sb=2

1gary

Why .040 over pistons and just to say pistons isn't enough info.The static compression ratio dictates alot about the rest of a build.5.7 rods or 6.0 rods,cast vs forge,etc.Want help with this build these details are very important.Where do you want the engine's power curves??.Again-don't think that .040 over a standard .030 is that much of a advantage.0 deck??.So if you could explain why you think what your are doing is important to you,we can help you with that.If your trying to learn about builds and need help with that,tell us what are your goals and then we can help you get there.Brand names of part play a huge role too.The cheapest is just that in many cases.All depends on intended use.Stay hooked in here and away from magazines glossy ad's.

So please fill in the blanks.Then we can go on from there.

Guest

The OP's SCR should be around 10.5:1 with good quench. Those heads, after 2 resurfacings by now, should be a nominal 62 cc. With poor quench, still 10.0:1.
Either way, it's gonna need a healthy cam and high octane.

1gary

How about letting him tell us more details???.Just to know ther cc of the heads isn't enough.You got to link parts for a combo.Newbie here,but at 64 yrs old a lifetime of building.

My two cents worth(really it's a dollar,but I discount for friends LOL)is builds starts should be from the rear end/tire size forward.Even the lowest of low builds should be a "known" factor step to next parts step process.It is the only way to get the biggest bang for the money spent.Also every one of them is in my mind like a college education.You start out thinking you know what major you want and then after two yrs of learning you find some else you want to do.I.E.-these forums for people that want to take the advise come on thinking they know what they want to do,ask for advise,then find out they really want something entirely different.So again without assuming anything,them tell us exactly what they have,learn.

Here is a link of formulas that are useful.

http://www.wallaceracing.com/Calculators.htm

http://www.csgnetwork.com/automotiveconverters.html

Those detail are very important....................

92 BBC Z

....and whats wrong with the BBC? Your going to be hard pressed to out perform the bbc with that combo.

1gary

"Nuthing".Just the $$$$$ difference can be kind of rude.

Guest

You can build the engine for the car, but the better path is to build the car around the engine. It's a relatively high compression 357 ci. Fine. And it doesn't really matter which flat top pistons they are, as nearly all the choices are in the 4-6 cc range.
The compression calls for a healthy cam. The cam dictates the torque converter.
So even if the car had a stock 454, a stock-stall TH400 and a 2.73:1 with 275/60R15 tires, it doesn't matter, because you really can't cam a 10.5:1 iron head 350 to play nicely with those parts.
You may have been hot rodding for 45 years, but that by itself is no guarantee that you were doing anything right or that you know best.

1gary

Ron,

Are those pistons cast or forged and why. Is he intending to spray it,etc.

Are the pistons for a 5.7 or 6.0 rod.Makes a difference in static c/r

Is the deck cut at 0 or where is it??.Again important to the static c/r

Which heads-intake runner cc and chamber cc.

C/R ratios do determine tons on the rest of the parts to match up

The to do list is for me anyways to build from the tire size,wt,rear end ratio,final ratio forward and not from the engine back.Plot the curves to work united with all the other parts.

See my point Ron??.Nawwww-the trail for this old coot hasn't gone cold.The days of slam and go long ago are dead.We do have the tech to roughly build towards and then tune towards that goal.Again those formulas some guys don't want to deal with and end up with the results as a cause because of it.

1983cameroman

i think i opened a can of worms

1gary

Naw-just some chatter.Post up what ya got and moving forward we'll help.

1983cameroman

ok 492 heads ported 202 160 valves think stock deck new studs new 202 swirl polish flat speed pro 4valve reliefpistons hyperrutectic040 over 5.7 rods old torker intake have torker two cam can get othercams easy for smallblock.cost is cheaper to me on small blockcam wise thinking more like mother thumper by comp 323gears 700 or 350 turbo 1 3/4 tube headers and 315/60 drag radials

1gary

Could I ask you just a question??.Are you going .040 over because you own the pistons or block or both that way already?Or your planning to go that way.

If the block was bored already,it can't be stock deck.The machine shop has to deck the block for a ref point for the bore.

Tell us your expected use.Street cruiser,street/strip,etc.

1983cameroman

ballthreeblock already bored

1gary

Is it in a short block form already??.

1983cameroman

[quote=1gary;5002768]Is it in a short block form already??.[/qu yes

1gary

Ok-so this is mainly a question about camming it and induction.It is common place for machine shops to run 0 deck or .010 down.Roll it over to TCD(I an guessing you still have the heads off)and measure how far down the pistons are or ask the machine shop what they did for the deck.Also are the heads cut??.Once we know that for sure we can figure the static compression ratio and suggest a cam.I got behind on work in the shop,so I have to head out to there shortly.I can catch up to you later today.If you know the following you can use the formulas I left for you in the links.

Bore
Stroke
piston volume
head cc
head gasket size(commonly used is .040)
deck

Then a cam choice knowing the static compression ratio.

1gary

You said the heads are ported.Any chance you know what the intake runner flows??.A old crud way to figure out what intake runner should be is.C.I. x .5.So for a 355 x .5 = 177.5.cc.But that doesn't account for so many other factors that come into play.

Just keep in mind one of the main reasons why there are aftermarket heads aside from having a hard time finding OEM that weren't cracked,was the OEM castings do limit the amount of porting that can be done.And most of the power output is with the top haft of these sbcs.

1983cameroman

pistons .10 headsi did myself to 1205 gasket then blended all way to bowl exhaust mainly opened to header gasket then polished

92 BBC Z

Wrong, the machine shop can overbore any engine regardless of deck height, or previous bore, assuming there's something left to bore.

1gary

I said they have to ref the deck(square/flat)to bore a block correctly.
That is why you find machine shops deck blocks.It's part of the process.

1gary

OK-oh just one more thing:







Where the heads cut??.What is the chamber cc??.

92 BBC Z

Still wrong. Gary, I worked for Millers Machine Shop for years,turning cranks, balancing cranks, building heads, and engines and eventhough I have a different career now, I still enjoy shop privledges and l spend lots of time there. Deck height is Not regularly used as a reference point for boring.

1gary

Ok-we are going to respectfully agree to disagree.Too many yrs doing to to even talk about it.

Explain the process you use...........

1gary

Sorry 1983.Please post the cc's of the heads.Ya know,this poor O/P has been subjected now twice to side track posts.All I am trying to do for him is give him the benefit of what 40 yrs building winning drag race cars.And machining the same.Now if it is because I don't have a number of posts to prove my medal,that isn't right.I'll post my project 383 if you guys want to pick on someone.But hey leave this guy alone.He hasn't done anything wrong and for that matter I haven't either.OK????

1983cameroman

dont know head chamber volume sorry they do look like have been cutif i make it out tomro ill get piece plexy glass hve cc scringe

1gary

OK-cool.I'll look forward to your post on that.

1983cameroman

i did a quicky check leveled head took 64 cc to fill chamber with no glass

onefast85

my question...if you already have a 468bbc in the car why do you want swap in a small block?it hard to beat the lowend of even a buget bbc..the sb you have doesnt stand a chance to out the bbc with just some mild swaps..if performance is what your after stay bbc..my 85 with junk peanut headed 454 went low 13's shifting at 5000rpm with a performer cam and intake.i would be glad to give advice to help with a bb upgrade..been racing and street driving bbc's for 24years...1st one made 300hp and the one in my 68 camaro makes 1200hp+ on nuts and also has 2 foggers on it.my 85camaro has been in the 8's at 3900lbs with a 598bbc with a plate kit.

1gary

Wow.How did I miss that in his signature??.Good catch.

1983cameroman

afording big block parts is anew problem for me

Guest

How about affording big block fuel consumption?

1983cameroman

when i got 454 was working now im disabled on fixed income thought could afford just not in the picture for me putting 40 over 350 together for betsy

1983cameroman

sold two novas ihad plus small block still found best deals on rat parts intake cam lifters new headers new rockers its alot of money forward thirdgeners

92 BBC Z

A lot of money for someone on a fixed income.

1983cameroman

everything two novas small block big block was bought while i was able to work now my funds cut in half have to sell to be able to buy get the picture i also have frame rails from s and w for a nova for sale too forward third genners