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Re: 470 dry sump engine on the dyno
[Re: AndyF]
#2393013
10/25/17 06:43 PM
10/25/17 06:43 PM
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Joined: Aug 2011
Posts: 2,855 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,855
Pattison Texas
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The other thing is that I don't think a low rpm pump gas engine is all that good of a test bed for this stuff. If I really want to see what is going on I need to build a high rpm screamer and then do some testing. Probably need to build something that has a power peak up around 8000 or 8500 rpm before the power changes start to get bigger. Just not a lot of choices for doing that with a BB Mopar unless I buy a KB block and then get some B1 heads or something like that. you could build a steel crank high rpm 400. that is if we had money to burn
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: 470 dry sump engine on the dyno
[Re: AndyF]
#2393366
10/26/17 02:23 PM
10/26/17 02:23 PM
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Joined: Nov 2003
Posts: 2,131 New Lenox IL
cudadon
top fuel
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top fuel
Joined: Nov 2003
Posts: 2,131
New Lenox IL
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Just finished up the analysis and building charts for the magazine article. Short summary is that on this engine a wet sump with vac pump made basically the same power as a dry sump setup. So pick your poison.
The Wilson porting work on the Indy intake picked up a nice chunk of power. The gain over the unported intake was more than 30 hp at the top of curve. The unported intake was run on the dry sump engine while the ported intake was on the wet sump + vac pump combo.
So if you have an as cast Indy 400-3 and you are making around 750 hp, sending that intake to Wilson for porting should be worth 25 or 30 hp. Andy when Wilson ported the Indy intake did they leave the clover leaf or change it to square flange? Witch magazine is this article in? Thanks for passing your tech to us! Don
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Re: 470 dry sump engine on the dyno
[Re: cudadon]
#2393387
10/26/17 03:03 PM
10/26/17 03:03 PM
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Joined: Jan 2003
Posts: 31,002 Oregon
AndyF
OP
I Win
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OP
I Win
Joined: Jan 2003
Posts: 31,002
Oregon
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Just finished up the analysis and building charts for the magazine article. Short summary is that on this engine a wet sump with vac pump made basically the same power as a dry sump setup. So pick your poison.
The Wilson porting work on the Indy intake picked up a nice chunk of power. The gain over the unported intake was more than 30 hp at the top of curve. The unported intake was run on the dry sump engine while the ported intake was on the wet sump + vac pump combo.
So if you have an as cast Indy 400-3 and you are making around 750 hp, sending that intake to Wilson for porting should be worth 25 or 30 hp. Andy when Wilson ported the Indy intake did they leave the clover leaf or change it to square flange? Witch magazine is this article in? Thanks for passing your tech to us! Don Wilson has always gotten rid of the clover leaf design on any intake they have ported for me. There are some pictures earlier in this thread but here are some more. All of my tech articles are on the Hot Rod website. Just go to Hot Rod and then search for 470 or 270 Trick Flow or something like that and you'll find them.
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