From a 300-36 intake to a Victor Jr.

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pdq67
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Re: From a 300-36 intake to a Victor Jr.

Post by pdq67 »

I wonder how much more power onna these little 302 engines would make if you up everything so that it will produce max power at 9,000 rpm?

And I like the hp and t curves still going up past 5252 rpm!! I figure if everything is set right, that's where the big power is made...

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Re: From a 300-36 intake to a Victor Jr.

Post by Carnut1 »

0728162039a_2.jpg
Paul, I was working on a combo for a friend who has a 292 project. I did have to guess at some components but it is interesting how the little engines make power. This is the sixth sim I did just changing cams. ( backing down on duration and lift) Basic engine 292 Chevy with my 128 heads off my sf600 learning curve thread, 260 cfm, 200 cfm, 2.0/1.55, sft cam, good flowing single plane intake, 750 carb 10/1 comp, small tube headers with open exhaust. I know these programs can be optimistic. This was the smallest cam bringing the torque into a nearly usable range. 270, 270, 224, 224, .46, .46 @106 icl, 108 lca. Made up cam. But a small sft that could be drivin on the street. Cylinder pressure was acceptable for 93 octane with sharp tuning. Opinions welcome. And I will add that pushing the valve train over 7000 rpm is tough on a street car. (I have done it) 9000 rpm would be a maintenance nighmare.
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Re: From a 300-36 intake to a Victor Jr.

Post by novadude »

Carnut1 wrote: 9000 rpm would be a maintenance nighmare.
Not to mention the fact that will have no power at all below 5000 rpm, and you had better have 5.38 gears and a big converter (or steep 1st gear in a manual trans) if you do not want to be left at the light by a stock 150hp 305. :wink:
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Re: From a 300-36 intake to a Victor Jr.

Post by Carnut1 »

I see I can kill a thread in a heartbeat.
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Re: From a 300-36 intake to a Victor Jr.

Post by Carnut1 »

Screenshot_2016-07-30-08-12-14.png
Srp 302 forged pop ups. Thick rings 3"stroke decent comp with a deshrouded chamber.
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Re: From a 300-36 intake to a Victor Jr.

Post by Carnut1 »

Screenshot_2016-07-30-08-38-41.png
This is a nice piston, not cheap but nice 355 with 5.7" rod piston. Would work for 3" stroke and 6" rod. Compression would need to be calculated because the stroke is different.
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Re: From a 300-36 intake to a Victor Jr.

Post by F-BIRD'88 »

Carnut1 wrote:
Screenshot_2016-07-30-08-38-41.png
This is a nice piston, not cheap but nice 355 with 5.7" rod piston. Would work for 3" stroke and 6" rod. Compression would need to be calculated because the stroke is different.
That piston would be sticking out of the block with a 6" rod. The CH is wrong for a 6" rod and 3" stroke.
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Re: From a 300-36 intake to a Victor Jr.

Post by Carnut1 »

With the deck height unknown, gasket thickness unknown, it was just a suggestion. A 5.85" rod is another option. The block really should be decked and then a better gasket than the steel shim can be used. I like the steel shim gasket but they are a bit unforgiving if the deck and heads are not perfectly flat and the surface finish is not smooth. We will need to work together for available parts that will accomplish the goals. I found a post this morning that Paul was working on this project in 2006. If I had the ability I would bang on Paul's door and machine up his block today foc. But that is me.
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Re: From a 300-36 intake to a Victor Jr.

Post by pdq67 »

4.00" bore x 3.00" stroke.

Deck height = stock, 9.025".

Gasket = Felpro #1094, .015" thick steel shim.

I guess that it boils down to a 6.20" long small journal rod with a custom piston to make right at a .040" quench using Felpro's gasket.

Unless there is another combination out there that I can mill the piston down to get what I want?

Going to use flat-top pistons anyway.

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Re: From a 300-36 intake to a Victor Jr.

Post by Carnut1 »

pdq67 wrote:4.00" bore x 3.00" stroke.

Deck height = stock, 9.025".

Gasket = Felpro #1094, .015" thick steel shim.

I guess that it boils down to a 6.20" long small journal rod with a custom piston to make right at a .040" quench using Felpro's gasket.

Unless there is another combination out there that I can mill the piston down to get what I want?

Going to use flat-top pistons anyway.

pdq67
So an undecked 60+ year old block better be very well checked with a machinist edge if you want those steel shims to live. I would invest and get that old block decked! Heads milled too! The 6.2" sj does not exist that I can tell. I started to look for a taller piston and a 6" rod combo for you but ran out of time. They do make a nice 302 pop up for a 5.7" rod that I posted. Do you have a set of late model sj rods? The late model rod has extra material around the bolt head. The earlier weaker rods are totally round on the sides. I know a ground, polished, balanced, shotpeened, arp bolted, resized rod is good for 7000 + rpm but at that point it costs more than a Import aftermarket rod.
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Re: From a 300-36 intake to a Victor Jr.

Post by wyrmrider »

better figure on at least a .010 cut and figure on 9.015
Most of the SBC stock block I did cleaned up there
some don't
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Re: From a 300-36 intake to a Victor Jr.

Post by autogear »

Square up the block and check your lifter bores.
Paul; has this block been sonic checked and magged before?
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Re: From a 300-36 intake to a Victor Jr.

Post by pdq67 »

Guys,

Bringing this back from the dead is all.

I have everything except a steel damper, 14" steel flywheel, and gaskets to put this together and the install it in my '67 350SS Camaro 4-speed, 12-bolt posi car.

Right now my car has my new 496 in it that I haven't lit off yet so go figure.

pdq67

(2) 400 SBC blocks and a bunch of different heads. Even a new pair of 2.5" rams-horn's IF I can mount them?
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Re: From a 300-36 intake to a Victor Jr.

Post by travis »

Paul, do you realize it’s been about 14 years since I helped you install the trans in that Camaro? You’ve got to work faster buddy :wink:
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Re: From a 300-36 intake to a Victor Jr.

Post by pdq67 »

Travis,

Why don't you come up and help me light off my 496??

If I gave you a can full of wheel studs, bring them with you.

Paul
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