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Old 10-12-2009, 12:37 AM
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Help building a 400-450hp 383 stroker

Hey guys I want to get some ideas on how to get 400 or mabey more hp out of a 383 stroker. I want to do it the cheapest way possable but obvi it wont be a 2 grand build. I do most of part searching on sites like Kijji and sites like that so prices dont matter to much but would be nice to have anyway . Ok so i am in the midst of getting a 350 4 bold not shure of the year but has 79 z28 heads. So yea whats the cheapest combo to make a true 400hp with out being a week mess. Also, are there any combos to make a true 400hp with just a 350? and no over boring? Thanks

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Old 10-12-2009, 12:45 AM
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Here are 109 dyno-proven small block Chevy combinations. Knock yourself out......
http://www.ryanscarpage.50megs.com/combos1.html
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Old 10-12-2009, 09:38 PM
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Originally Posted by techinspector1
Here are 109 dyno-proven small block Chevy combinations. Knock yourself out......
http://www.ryanscarpage.50megs.com/combos1.html
Thanks, I had a look but some of them seem like just a guess. Also They dont say anything about internal mods. I dont mean to be a pain in the neck but yea, I am just really confused

Last edited by handymann3; 10-12-2009 at 09:47 PM.
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Old 10-12-2009, 11:45 PM
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Originally Posted by F-BIRD'88
Its not hard to get 400-450hp out of a 350. First thing to do is scrap the 79 heads. If you have a rebuildable 350 core and are on a budget, then stroking it adds unnessary expense.
LOL yea i wasn't planing on making 450hp with smog heads. but yea, got any set ups? p.s Its boing into my 81 T/A
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Old 10-13-2009, 12:10 AM
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Originally Posted by F-BIRD'88
How do you plan to use the car? drag? street/strip? cross country trip?

$budget$?
Sorry lol should have mentioned that. I want a steet/strip. As for budget, cheap s possable. I say that because i dont really have a budget yet. I am asking so i know what to look out for and how much i need to put aside for the engine build. Thanks
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Old 10-13-2009, 12:43 AM
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Originally Posted by F-BIRD'88
Another good path to a simple 450hp street-strip 350SBC is to build a supercharged combo around a 144cid B&M/ Weiand mini blower. (low 8.5:1 compression ratio for pump gas)
I took a look at the artical you sent the link for but it said it can with 11.25.1 compression, will the engine like 93 octane?
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Old 10-13-2009, 01:10 AM
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Originally Posted by F-BIRD'88
Over 11:1 cr on this motor is a bit too much for the premium pump gas we have.

That is why I would build it with a finished true 10.5:1 instead of 11.25:1.

The resulting effect on the real power output is minimual. (less than 2%)

10.5:1 will get the same job done without being so close to the edge of engine damaging knock threshold on pump gas.

11.25:1 is more than whats nessessary at this power level and needs more fuel octane than pump gas provides.

Building to the different lower cr is just a matter of parts selection/machining build specs. The cost will be the same.
Thanks ALOT man, you gave me the exactly what i was looking for. But not to bust your ball$ you mentioned about rear gears. I curently have richmond 3.73's will they be any good? will they kill me at the 1/4?
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Old 10-13-2009, 10:19 AM
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Originally Posted by F-BIRD'88
Alternatively if you were to run the magazine engine combo (w 10.5:1 cr) along with a 150-180hp nitrous system, the 3.73 gear would be just about right for 1/4 mile ET racing.
So with all these options what do you think i should do? Build the engine and change up the gears, or blow it and leave the gears. I really want it to be a monster but still steetable. I was thinking about the gears you sugested and was wondering if they will work on the highway? Also, what would you say the price difference is?
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Old 10-13-2009, 04:03 PM
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Originally Posted by handymann3
some of them seem like just a guess. Also They dont say anything about internal mods.
Although all of them were magazine tests which are sometimes suspect, they WERE dyno pulls. Pick one you like and the rest of us on the board can counsel you as to the internals to match up to the power.
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Old 10-14-2009, 07:22 AM
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Although all of them were magazine tests which are sometimes suspect, they WERE dyno pulls. Pick one you like and the rest of us on the board can counsel you as to the internals to match up to the power.
Well after talking to f bird I think the best way to go is the super charger. what do you think? I looked 'em up and alot of people are getting crazzy power just from putting a 177 weiand on a plane jane 350. So that saves me even more money not turning it into a 383.
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