Gains porting afr195 on sbc 388

General engine tech -- Drag Racing to Circle Track

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cwodgers
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Re: Gains porting afr195 on sbc 388

Post by cwodgers »

The 195 heads can make over 600hp. I started with AFR 195 eliminator Comp Ported. With a 400 sbc 10.4-1 ccompression, Comp Cams XE288hr, stock Team G intake, my 84 vette (3,250lbs with me) ran 11.42 @124mph on TA radials through mufflers at Firebird in Idaho (DA about 3500') Next installed a modified Holley 300-25 manifold, with open headers, MT Dot drag radials went 10.86 @125.66 at 3600' DA. FInally Wes King ported the heads to about 210 cc and installed a large Comp Cams Mech street roller. Dynoed at 602.5 @ 6400rpm. It ran 10.72 @126.75 mph (DA 5,900'). Stagger jetted it went 10.63 @ 124.4 mph (6,200 DA, no throttle last 40-50 yeard). Looking at the dyno numbers you can see the MCSA is the problem. Has anybody gone up to get more MCSA?
1980RS
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Re: Gains porting afr195 on sbc 388

Post by 1980RS »

cwodgers wrote: Tue Aug 16, 2022 12:46 am The 195 heads can make over 600hp. I started with AFR 195 eliminator Comp Ported. With a 400 sbc 10.4-1 ccompression, Comp Cams XE288hr, stock Team G intake, my 84 vette (3,250lbs with me) ran 11.42 @124mph on TA radials through mufflers at Firebird in Idaho (DA about 3500') Next installed a modified Holley 300-25 manifold, with open headers, MT Dot drag radials went 10.86 @125.66 at 3600' DA. FInally Wes King ported the heads to about 210 cc and installed a large Comp Cams Mech street roller. Dynoed at 602.5 @ 6400rpm. It ran 10.72 @126.75 mph (DA 5,900'). Stagger jetted it went 10.63 @ 124.4 mph (6,200 DA, no throttle last 40-50 yeard). Looking at the dyno numbers you can see the MCSA is the problem. Has anybody gone up to get more MCSA?
Put a ported Super Victor on the 400, it will go quicker yet.
cwodgers
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Re: Gains porting afr195 on sbc 388

Post by cwodgers »

Wes King tried the newer super vic on the dyno versus my 300-25, the 300-25 made 25 more HP and it made more power everywhere. Street driveability and track performace are outstanding. Plus it fits under the hood of my 64 corvette with an air cleaner. What I really need is more cross section at the pinch. I was hoping to see if anybody could effectively raise the port roof to gain .25"
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