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please help.....

 
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tcsmkfn20
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Joined: 11 Jun 2005
Posts: 7
Location: fontana ca


PostPosted: Tue Nov 21, 2006 4:30 pm    Post subject: please help..... Reply with quote

I am currently attending universal technical institute in rancho cucamonga,Ca and i am in our hot rod class and we are building chevy small block 350's and i am trying to beat the school record for for horsepower on a n/a motor which is 371hp. So i figured if anyone could help it would be the guys on this fourm....so if u have any ideas or any donor parts it would be greatly appreciated.......thank you Confused
Michael Green
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Dewey316
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Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech

1990 Chevrolet Camaro RS

PostPosted: Tue Nov 21, 2006 4:47 pm    Post subject: Reply with quote

I'm moving this to the garage forum.

What are the rules? How will the power levels be measured?

--John
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Tue Nov 21, 2006 6:51 pm    Post subject: Reply with quote

What restrictions are there on size and mods? How about intakes?
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rjmcgee
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Joined: 08 Jan 2004
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PostPosted: Tue Nov 21, 2006 7:40 pm    Post subject: Reply with quote

Asdfga3 wrote:
What restrictions are there on size and mods? How about intakes?


Sounds like most restrictions will be budget related.

-350
-stock crank and rods
-good rod bolts
-cast flat top pistons
-balanced
-junkyard Vortec heads modded for higher lift cam and screw in rocker studs
-Comp XE284 cam http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=12-250-3
-RPM or RPM air gap intake
-Holley double pumper 750 cfm
-HEI distributor

400 hp for not much money

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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Tue Nov 21, 2006 8:41 pm    Post subject: Reply with quote

I was kinda thinking that myself. Cause 371 isn't all that much. Hell, a head&cam on an LS1 would probably be more than that.
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Twilightoptics
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Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Tue Nov 21, 2006 8:57 pm    Post subject: Reply with quote

If its flywheel.... vortec heads, voodoo cam, 10:1 static compression, single plane intake.... about 426hp.
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izcain
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Joined: 09 Sep 2006
Posts: 1306
Location: Port Angeles WA

1983 Chevrolet Camaro Z/28

PostPosted: Tue Nov 21, 2006 9:25 pm    Post subject: Reply with quote

Try to do a little research if you do the vortecs and whatnot about proper quench and try to get the thinnest head gasket you can manage that will still keep the motor in it's proper quench. That way you can squeeze as much compression out of it as possible. If your trying to squeeze power here and there try to little tricks they use. After the build and running the motor, ice the intake down before each pull, run synthetic oil, @ least port match your intake to the heads and exaust ports to the headers or manifolds. I would take out the dremel and smooth the ports a bit on the intake. Try diffrent carb spacers if they allow those. When useing heads are you allowed to use other valvetrain ie. valves and springs and whatnot. I would try to run some undercut lightweight valves. Cheap but will outflow the stocker. There are people pushing WAY more then 371 N/A I dont think it would be hard to beat just depends on the limitations.
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1983 Z28 383 + 201ci more = New Heart for this season!
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Dewey316
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Joined: 08 Jan 2004
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Location: Bringing the tech

1990 Chevrolet Camaro RS

PostPosted: Tue Nov 21, 2006 10:19 pm    Post subject: Reply with quote

Yup, knowing the limitations of the rules, and of the budge are key, heck there are tons of 350 build-ups out there that will do 400hp. But, if you are stuck with some funny rules, or a really restrictive budget, then it might take some creativity.

If you can post up a VERY detailed outline of what you have to work with, the budget and rules, I am sure we can help out.

Also, if it is purely a horse power number, you might go really funky, and build up a 302 or something, and rev it to 9k, the extra RPM could make the diffrence.
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izcain
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Joined: 09 Sep 2006
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Location: Port Angeles WA

1983 Chevrolet Camaro Z/28

PostPosted: Tue Nov 21, 2006 10:23 pm    Post subject: Reply with quote

Solid lifter camshaft and some stiff springs and wind that sucker to the moon! Cool
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1983 Z28 383 + 201ci more = New Heart for this season!
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rjmcgee
The Hammer


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PostPosted: Tue Nov 21, 2006 10:40 pm    Post subject: Reply with quote

They are probably looking at something realistic. Unless you got thousands to spend on the bottom end alone you need to limit the RPM's to around 6000. Stock parts will work well to that. Also thats why I recomended the XE cam since it will peak around 6000.

Horsepower = $'s

More $'s gets more horsepower.
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Twilightoptics
Hardcore (12sec Club)


Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Wed Nov 22, 2006 9:25 am    Post subject: Reply with quote

Quench should always be the ideal .04. If they are doing this in a class, he should be able to either zero deck and us a .041 felpro gasket, or if it's around a stockers .025 in the hole... use the felpro steel shim .015 (which I use) and coat it with coppercoat.
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wanarunhard
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Joined: 11 May 2006
Posts: 125
Location: ellensburg wa


PostPosted: Wed Nov 22, 2006 11:15 pm    Post subject: horsepower Reply with quote

you guys ever hear of the 350 in camaros and chevelles that had 350 horses stock? i think it was late 60s era cars get one of those and bump it up a bit if you can find one
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chevymad
Master B


Joined: 11 Jan 2004
Posts: 5476


1987 Pontiac Formula

PostPosted: Thu Nov 23, 2006 12:31 am    Post subject: Re: horsepower Reply with quote

wanarunhard wrote:
you guys ever hear of the 350 in camaros and chevelles that had 350 horses stock? i think it was late 60s era cars get one of those and bump it up a bit if you can find one


They also had a 370hp which is the original LT1. The Z28's 302 used all the same parts. The most hp GM ever claimed for a gen 1 sb was the 375hp 327.

All of these #s don't mean much now though. Horsepower was rated alot differently before 1971. The new Lt1 from the 90s was named so by GM because it was the first sb, post smog, to equal the horsepower of the original. It was only rated 300hp in the vette and 275 in the fbody.

We'd also need to know the correcton factor to be used. All the magazine's and aftermarket crate suppliers use a more favorable correction then the factory's do. Kinda like statistics, you can play with the #s until you get what you want.

I think Rod and Paul both gave modern combo's that would work. Izcain and John had ideas that would work too. You can take their idea and build a "327 on steroids" by using a 400 block and lj 327 crank. Comes out to 350cid but with a short stroke. Run a solid lifter cam and like they say rev her up. It will provide a nice hp number.. .maybe not so driveable though. If its just a 350cid limit then you could do this. If you have to use a 350 block and crank.. then this ideas out.

Budget for heads is the key. Low budget- use camelhumps like the motor wanarun suggested and do a bunch of porting yourself. Slightly better then that would be the vortecs. If you have a grand to spend on heads get the summit/brodix aluminums and boost your compression up to 11:1.
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