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500 hp 283 engines.

General engine tech -- Drag Racing to Circle Track

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SpeierRacingHeads
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Re: 500 hp 283 engines.

Post by SpeierRacingHeads »

F-BIRD'88 wrote: Tue Sep 08, 2020 11:40 am BP on this test printout is very low.
The one I posted?
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Re: 500 hp 283 engines.

Post by lefty o »

SpeierRacingHeads wrote: Tue Sep 08, 2020 10:50 am 3.00 stroke, 304, built in 1995 for Melanie Troxel and a C/ED.

Sheetmetal maifold and legal 750 carb. 282/292 110 cam with .810 lift.

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126% VE, that thing is moving some air.
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Re: 500 hp 283 engines.

Post by tenxal »

1972ho wrote: Tue Sep 08, 2020 10:47 am37 psi oil pressure at 8500 it must be a lot it flowing through the system.
No...just the opposite. 3.5 qts of circulating oil.
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Re: 500 hp 283 engines.

Post by vortecpro »

F-BIRD'88 wrote: Tue Sep 08, 2020 11:40 am BP on this test printout is very low.
Test was done @ Madcap in Denver, the baro IS correct. Observed or in the room HP was 524 HP before the correction. Vapor pressure looks high to me though for Denver.
Racing a NA NHRA stocker should be mandatory before any posting.
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Re: 500 hp 283 engines.

Post by rustbucket79 »

tenxal wrote: Tue Sep 08, 2020 9:41 pm
1972ho wrote: Tue Sep 08, 2020 10:47 am37 psi oil pressure at 8500 it must be a lot it flowing through the system.
No...just the opposite. 3.5 qts of circulating oil.
I looked at that pressure and immediately assumed it has a reduced volume oil pump as part of the package. When you’re scrounging for every last hp..... :wink:
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Re: 500 hp 283 engines.

Post by tenxal »

rustbucket79 wrote: Tue Sep 08, 2020 11:24 pmI looked at that pressure and immediately assumed it has a reduced volume oil pump as part of the package. When you’re scrounging for every last hp..... :wink:
No...it does not have a reduced volume oil pump.
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Re: 500 hp 283 engines.

Post by pdq67 »

These little 3" stroked engines need better valve springs than the -929 cam springs used in a stock Z-28 302 engine!

Of course they will blow up at 8,000 rpm using the stock springs. Float the valves and bang!

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Re: 500 hp 283 engines.

Post by PackardV8 »

pdq67 wrote: Sun Sep 13, 2020 5:05 am These little 3" stroked engines need better valve springs than the -929 cam springs used in a stock Z-28 302 engine!

Of course they will blow up at 8,000 rpm using the stock springs. Float the valves and bang!

pdq67
Springs would only be the first parts to replace. The crank, block and heads were the only pieces in a '68 Z28 reliable at 8,000 RPM.
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Re: 500 hp 283 engines.

Post by mt-engines »

vortecpro wrote: Tue Sep 08, 2020 9:52 pm
F-BIRD'88 wrote: Tue Sep 08, 2020 11:40 am BP on this test printout is very low.
Test was done @ Madcap in Denver, the baro IS correct. Observed or in the room HP was 524 HP before the correction. Vapor pressure looks high to me though for Denver.
5200ft is probably good air in lakewood.
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Re: 500 hp 283 engines.

Post by vortecpro »

mt-engines wrote: Sun Sep 13, 2020 3:51 pm
vortecpro wrote: Tue Sep 08, 2020 9:52 pm
F-BIRD'88 wrote: Tue Sep 08, 2020 11:40 am BP on this test printout is very low.
Test was done @ Madcap in Denver, the baro IS correct. Observed or in the room HP was 524 HP before the correction. Vapor pressure looks high to me though for Denver.
5200ft is probably good air in lakewood.
I've NEVER raced in a 5200 feet DA in Denver, 6900 one time.
Racing a NA NHRA stocker should be mandatory before any posting.
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Re: 500 hp 283 engines.

Post by steve cowan »

tenxal wrote: Tue Sep 08, 2020 9:41 pm
1972ho wrote: Tue Sep 08, 2020 10:47 am37 psi oil pressure at 8500 it must be a lot it flowing through the system.
No...just the opposite. 3.5 qts of circulating oil.
Is that a dyno pan only?? With 3.5 quarts of oil in that pan the crank would not be splashing through any oil I would think,small oil filter is interesting as well.i am amazed of the rpm turned with that small carb but looks can be deceiving, thanks for sharing very impressive.
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Re: 500 hp 283 engines.

Post by tenxal »

steve cowan wrote: Sun Sep 13, 2020 6:27 pmIs that a dyno pan only?? With 3.5 quarts of oil in that pan the crank would not be splashing through any oil I would think,small oil filter is interesting as well.i am amazed of the rpm turned with that small carb but looks can be deceiving, thanks for sharing very impressive.
The pan is the one that's run on the car. If you look closely, you can see the tunnel that the drag link runs through.

Glad you enjoyed it! :)
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Re: 500 hp 283 engines.

Post by steve cowan »

Yep can see that ,way cool
Also the spacer under carb is machined on angle,maybe a bit more to it than keeping carb level at ride height??
Plenum area and booster signal on the small secondary??
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Re: 500 hp 283 engines.

Post by tenxal »

steve cowan wrote: Sun Sep 13, 2020 8:41 pm Yep can see that ,way cool. Also the spacer under carb is machined on angle,maybe a bit more to it than keeping carb level at ride height?? Plenum area and booster signal on the small secondary??
All of the above. And more. :wink:

This is a Super Stock '94-'96 265. It's really impressive and has been in the top on the NHRA qualifying sheets many times.

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Re: 500 hp 283 engines.

Post by F-BIRD'88 »

So..,. how would you build a 500 bhp street/strip bracket racer 283 sbc? pump gas? race gas? heads, cam/valvetrain, induction, exhaust, oiling control....etc?
How would you skin this cat... ?
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