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Old 12-29-2005, 09:48 AM
1969NovaSS's Avatar
turbo lag......yeeeeehaaaaaaw
 
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Bottom end strength

I recently got hold of a 400 block that alreay had all the machine work done.I was messing around on dd2000 and came up with 564hp. Now i need a bottom end that will hold it.the pistons i used were hyper. can those hold that much power at 6500 or do i need forged?Also do i need a forged crank or is a cast steel crank good. i do not plan to spray or blow it ust push it once and awhile.the rods i was looking at are the summit stage 2 i beams.does that sound decent or should up to forged crank and pistons and some h beam rods. feel free to criticize as i havent bought anything yet. any help is greatly appreciated.
I forgot to ask is it ok to use 64cc chambers on a 400 or should i buy pistons to use with a 76cc head.

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Old 12-29-2005, 10:07 AM
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The 400 isn't a high-winding engine. 6500rpm sounds a bit severe. I'm sure someone will now come on and say they wind theirs to 10,000! I try to stay at about 5,500.

The choice of heads depends on the type piston and your compression ratio, which depends on the cam you use, which depends on what the engine is to be used for. A lot of unknowns.
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Old 12-29-2005, 11:12 PM
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turbo lag......yeeeeehaaaaaaw
 
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bottom end strength

the specifics are: magnum 292 cam, 11-1cr w/ 64cc heads, rpm airgap, 750 speed demon, stage 2 ported trickflow kenny dutweiler heads, 3500 stall, th350, 4.11 gears, hokker ceramic coated competition headers to 2.5 super 40. i wouldnt think that 6500 is a lot as there is someone on here i think that spins it to 7500 but am not sure. do you think the bottom end will hold up to this. it is a street strip car only driven on the weekends and maybe to work once or twice.
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Old 12-30-2005, 06:26 AM
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I don't think you'll have any problems with the bottom end. EA3.2 isn't anywhere near as kind to your power dreams as DD.

RPM···········2000····2500····3000····3500····4000 ····4500····5000····5500····6000····6500
Brake_Tq······296·····372·····421·····413·····429· ····439·····431·····404·····368·····301
Brake_HP······113·····177·····240·····275·····327· ····376·····411·····424·····421·····373
Exh_Pres······.1······.3······.4······.6······.9·· ····1.2·····1.5·····1.7·····1.9·····2.0
Int_Vacuum····.1······.2······.3······.4······.5·· ····.8······1.0·····1.1·····1.3·····1.4
Vol_Eff_%·····64.9····74.9····82.8····83.8····88.0 ····91.8····93.5····92.5····90.4····86.3
Actual_CFM····165·····237·····315·····371·····446· ····524·····592·····645·····687·····710
Fuel_Flow·····60.1····86.6····115·····136·····163· ····191·····216·····236·····251·····260
A/F_Mix_Qal···96.3····99.4····100.0···100.0···100.0· ··100.0···100.0···100.0···100.0···100.0
BSFC··········.533····.490····.478····.493····.499 ····.509····.527····.556····.597····.697
BSAC··········6.692···6.141···6.002···6.185···6.25 6···6.384···6.609···6.977···7.490···8.741
Friction_HP···23······34······47······61······79·· ····102·····129·····161·····198·····258
Mach_#········.175····.219····.263····.307····.351 ····.395····.439····.483····.526····.570
Piston_Spd····1250····1563····1875····2188····2500 ····2813····3125····3438····3750····4063
Piston_Gs·····283·····442·····637·····867·····1133 ····1433····1770····2141····2548····2991
Overlap_%VE···-6.1····-1.5····1.5·····-2.1····-1.6····-.4·····-.3·····-.9·····-1.5····-1.7
Int_AvgVel····122·····152·····182·····213·····243· ····274·····304·····334·····365·····395
In_InertiaPrs·.2······.7······1.3·····1.9·····2.3· ····2.6·····2.7·····2.6·····2.4·····2.1
In_ResTunPrs··0.0·····0.0·····0.0·····0.0·····0.0· ····0.0·····0.0·····0.0·····0.0·····0.0
Ex_AvgVel·····132·····165·····198·····231·····264· ····297·····330·····363·····396·····429
ExTun_Prs·····1.2·····-.2·····-.6·····-.3·····-.8·····-1.5····-1.9····-2.0····-1.7····-1.4
Lifter_Pump_UpNone····None····None····None····None ····None····None····None····None····None
Spark_Adv·····23······23······23······29······32·· ····33······33······34······35······35
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Old 12-30-2005, 07:20 AM
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Youre confusion is not logical
 
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Yeah I agree with the findings above. I just completed a DD200 run using all the specs you provided, no mufflers, and the CNC orted Duttweiler heads and came up with 469 hp @ 5500 RPM and 490 ft-lbs @ 4500 RPM. I don't know how you got 564 hp. If you really want to model different engine combinations go download the trial of Engine Analyzer Pro 3.3.

Oh, I run an externally balanced cast iron rotating assembly in my 400. 500 hp with no problems. Street car though - no burnouts.
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Old 12-30-2005, 08:50 AM
edge's Avatar
Time is short, are you ready?
 
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Just don't jump the rear wheels off the ground

Click on the picture


Ed
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Old 12-30-2005, 08:54 AM
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turbo lag......yeeeeehaaaaaaw
 
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bottom end strength

Dont worry edge ill use wheelie bars
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