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FE Power Forums => FE Technical Forum => Topic started by: winr1 on June 05, 2021, 10:41:43 PM

Title: As to engine an head threads .. flow an stuff .. what about 390 CI tests ??
Post by: winr1 on June 05, 2021, 10:41:43 PM

I would suppose more than a few have 3.78 stroke mills

What Would the various FE heads do on the above ??



Ricky.

Title: Re: As to engine an head threads .. flow an stuff .. what about 390 CI tests ??
Post by: 475fetoploader on June 06, 2021, 12:17:41 AM

Similar with less velocity.

Title: Re: As to engine an head threads .. flow an stuff .. what about 390 CI tests ??
Post by: blykins on June 06, 2021, 05:41:47 AM

Take a gander through the dyno results page.  One of my 390’s made 540 hp with 10:1 compression, hydraulic roller, Performer RPM, and TFS heads.   

From a factory head aspect, it took fully ported CJ heads, a Tunnel Wedge, a point more compression, and a cam that was about 18° bigger on duration to match it. 

Title: Re: As to engine an head threads .. flow an stuff .. what about 390 CI tests ??
Post by: CaptCobrajet on June 06, 2021, 08:58:26 AM

We did a 390 engine about a year and a half ago that was 397 cubes, 3.78 stroke, iron C4AE-G heads, single carb, .570 lift cam, and 10.45 to 1, that made 622 hp on Bischoff's dyno.  I reckon it just depends on how you go about it, and how you plan to use it.

Title: Re: As to engine an head threads .. flow an stuff .. what about 390 CI tests ??
Post by: winr1 on June 09, 2021, 09:41:17 AM

Have only changed my plans 10 or so times ... lol

Thanks guys



Ricky.

Title: Re: As to engine an head threads .. flow an stuff .. what about 390 CI tests ??
Post by: chilly460 on June 09, 2021, 11:02:22 AM

I think this is just another no brainer deal with the TFS heads a they have as small or smaller port size as any of the other heads, and marginally larger than ported OEM head that would be anywhere close to them.  For a “small” FE, seems they’re the clear choice.  The only thing I’d ponder is a TFS port made up to support a smaller 2.09 and throat/bowl size that may better match the 390 bore and cubes, but not very likely to happen and I have no clue if its really necessary (just looking at all the stroker small blocks making big power with 2.08s)