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Tech Talk => Engine Mechanical / Electrical => Topic started by: jamminjetta on March 12, 2015, 01:24:26 AM

Title: Building a 396
Post by: jamminjetta on March 12, 2015, 01:24:26 AM

Just dropped engine off at machine shop on Saturday. 4 bolt main 396.


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Title: Re: Building a 396
Post by: hallett1974 on March 12, 2015, 04:26:45 AM

Nice

Title: Re: Building a 396
Post by: 86caribbean on March 12, 2015, 10:20:05 AM

Why not go larger displacement?, if there is such as a thing as free power, it comes with engine size. It wouldn't cost you any more to go with a 454 or slighty larger, and sell the 396 to someone that is looking for a period correct block to do a restoration on a Camaro, Chevelle or El Camino, they will pay a good price for those blocks, just my 2 cents worth.

Title: Re: Building a 396
Post by: jimpen on March 12, 2015, 11:05:33 AM

Quote from: 86caribbean on March 12, 2015, 10:20:05 AM

Why not go larger displacement?, if there is such as a thing as free power, it comes with engine size. It wouldn't cost you any more to go with a 454 or slighty larger, and sell the 396 to someone that is looking for a period correct block to do a restoration on a Camaro, Chevelle or El Camino, they will pay a good price for those blocks, just my 2 cents worth.

. If horsepower does not mean anything I would not worry about a 396 however if it does I would not even go that route. Go big!!!!!!


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Title: Re: Building a 396
Post by: jamminjetta on March 12, 2015, 03:03:39 PM

Well should have more power than the stock 454 I currently have. I sorta fell into the 396 pretty cheap so it's a go.


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Title: Re: Building a 396
Post by: che77y on March 14, 2015, 11:22:58 PM

What year heads and is it a truck block or not I like being diff and those older 396s can pack a ffn wallop

Title: Re: Building a 396
Post by: jamminjetta on March 14, 2015, 11:35:47 PM

Casting num says its a 402. Heads are 65-66 closed chamber. Thinking of going with some edelbrock aluminumn heads.


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Title: Re: Building a 396
Post by: che77y on March 14, 2015, 11:57:46 PM

Wow so it's a 70 block?

Title: Re: Building a 396
Post by: che77y on March 15, 2015, 12:00:12 AM

I just did some research man it says in 70 they inroduced the sb 400 and they didn't want a sb having more cubes than a bb

Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 12:04:20 AM

Gonna be tuned on a dyno. So I'll know exactly the power numbers then.


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Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 03:10:15 AM

I have very basic standard bore 1971. 402 in my flatty. . 9to1 comp xm278 cam. In a very heavy old school flatty itll run 65 @ 5200 all day.. but i do have a prop... im building a 461 but it got put on hold for alil bit. And the 402 is goin back in with a tunnel ram on it.. we'll see how it works out soon... lol.. i love small stroke big bore combo's. Cuz they rpm. Maybe not a jet boat thing tho.. i wanna spin the fu#k outta my prop...>:D

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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 03:27:55 AM

My 454 turns my A impeller 4000 rpm. This new motor is gotta be better.


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Title: Re: Building a 396
Post by: Flusher on March 15, 2015, 03:36:17 AM

Quote from: aquaholic72 on March 15, 2015, 03:10:15 AM

Maybe not a jet boat thing tho.. i wanna spin the fu#k outta my prop...>:D

Not true.  The majority of boats we support in NJBA are over the 550ci range and spin just over 7000 RPM.  A few were even turning 9K+ with a gearbox to underdrive the pump, but that class might not make it.

Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 03:41:31 AM

Ok.. let me recover from my post.. those of us on a strict budget.. lol lotta money in anything that turns 9k..

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Title: Re: Building a 396
Post by: Flusher on March 15, 2015, 03:41:46 AM

Don't be afraid to let it rev.  A smaller impeller with more RPM might be the ticket with a 396.

Title: Re: Building a 396
Post by: Flusher on March 15, 2015, 03:45:53 AM

Quote from: aquaholic72 on March 15, 2015, 03:41:31 AM

Ok.. let me recover from my post.. those of us on a strict budget.. lol lotta money in anything that turns 9k..

Yeah, I was trying to figure out how I could put that engine on my credit card when it went up for sale for $50K.  $1000 for valve springs every pass is just not going to happen in my life.

Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 03:51:01 AM

I obviously have a vdrive. And im tryin to spin my prop..  the regular pump boats always seam to be controlled by the pump.. ?? Yes no?.. we're talkin budget not lottery winnings! Lol

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Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 03:59:58 AM

A healthy 402 small stroke big bore with good parts can run very well.. the good. Most came with steel cranks n forged pistons from the get go.. just sayin. Build it. Its not gonna set the water on fire. But itll run good and be reliable. Budget friendly ish..

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Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 04:06:35 AM

I love bs'n with u flusher.. but how did 402, get stuck into a 550 catagory??? Big money jump... if we were all shittin cnotes we'd all have 632's.. lol or 705's.. if i hit the lotto.. ur all gettin one!! Lol

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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 04:08:11 AM

It's not summer here till end of May. I'll be done by then for sure.


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Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 04:12:33 AM

Where are u.. seasons here in so cal

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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 04:14:27 AM

Amarillo tx


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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 04:15:08 AM

Amarillo tx


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Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 04:26:06 AM

My family lives in haslet tx. Not sure where that is to u.. close to dfw.. they hammer me all the time to move my ass out there.. just cant seem to leave this shitty state of cali.. my roots are dug and i like to fight all our bullshit.. lol even tho i hate it...

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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 04:27:47 AM

I'm always the only one around here with a jet boat.


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Title: Re: Building a 396
Post by: aquaholic72 on March 15, 2015, 04:36:12 AM

Well i hope u end up with a good runnin small inch jet boat..

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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 04:38:45 AM

It's gotta be better than the 1987 all stock 454 I currently run. Engine builder said 450 horse is pretty achieve able


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Title: Re: Building a 396
Post by: 74hondo on March 15, 2015, 08:27:36 AM

You might not be the only one for too much longer. I might transfer out to Amarillo for work.


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Title: Re: Building a 396
Post by: jamminjetta on March 15, 2015, 12:51:19 PM

Come on. We have a nice little lake here with a nice little sandy beach


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Title: Re: Building a 396
Post by: Riverlife_ on March 16, 2015, 09:29:21 PM

I am running a 396 large oval port closed chamber heads, steel crank forged pistons, Hyd roller set up, tunnel ram w/ 2 holley 450's,  and I cut the impeller to a b- and it spins a solid 5300rpm and is happy there, no major port work or anything special. 
Just a good runner 


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Title: Re: Building a 396
Post by: jamminjetta on March 16, 2015, 09:30:53 PM

What cam u running


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Title: Building a 396
Post by: Riverlife_ on March 16, 2015, 09:35:59 PM

I'll have to look for the cam card, but it's something around 270 adv duration,  520lift


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Title: Re: Building a 396
Post by: jamminjetta on March 16, 2015, 09:36:34 PM

Logs or headers.


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Title: Re: Building a 396
Post by: Riverlife_ on March 16, 2015, 09:37:34 PM

Logs


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Title: Re: Building a 396
Post by: Riverlife_ on March 16, 2015, 09:40:33 PM

Here's a pic


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Title: Re: Building a 396
Post by: Riverlife_ on March 16, 2015, 09:42:36 PM

And I just switched to the tunnel ram, last season I ran a Victor jr. Intake and a single holley 750cfm double pumper, and it ran really good. 

So I haven't tested it yet with the tunnel ram.


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