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Re: [Tigers] Small-Block Intake Manifold Survey

To: tigers@autox.team.net, Thomas Witt <atwittsend@verizon.net>
Subject: Re: [Tigers] Small-Block Intake Manifold Survey
From: <wsamouce@kc.rr.com>
Date: Tue, 27 Apr 2010 20:51:36 +0000
I have a F4B for sale if anyone is interested.  I also have a cast iron 2V 289 
intake.  Make and offer. 

Duke
B382002037


---- Thomas Witt <atwittsend@verizon.net> wrote: 
> Interesting..., I put the garden variety Performer side by side with the 
> often sought after F4B.  I also threw in the Stock intake as a comparison to 
> the winner in each of the RPM ranges.  Hopefully the format will display 
> correctly with the plain text requirement. Based on this test:
> 
> Performer vs F4B (and Stock intake comparison)
> 
> RPM         HP difference (gain)   Stock (over/under PFR vs F4B)
> 2750         F4B  1.9                    + 3.1
> 3000         PFR  4.0                    + 4
> 3250         PFR  0.4                    + 1.9
> 3500         F4B  2.8                     -6.7
> 3750         F4B  0.5                     -8.2
> 4000         F4B  4.4                     -11
> 4250         F4B  1.7                     -13.9
> 4500         PRF  4.2                     -18.6
> 4750         F4B  4.1                     -23.8
> 5000         F4B  9.2                     -19
> 5250         F4B  30.7                   -21.5
> 
> The stock manifold was best up to 3250 RPM.
> 
> The Performer and the F4B see-saw back and forth.  Up to 4750 RPM there is 
> no more than a 4.4 HP difference.
> 
>  The Performers greatest benefits seem to be at 3000 and 4500 RPM.
> 
> The F4Bs greatest benefit is above 4750 RPM with a noticeable 30.7 HP gain 
> at 5250 RPM.
> 
> An interesting final note is that the F4B never hit the maximum HP the 
> Performer did (233.7 at 4500 RPM). The F4B topped out at 231 HP at 4750 RPM.
> 
> Conclusion (based on these test):
> 
>  The Performer or F4B are an improvement on the stock intake from 3250 and 
> up RPMs.
> 
> The difference between the Performer and F4B are only about 4 HP up to 4750 
> RPM.
> 
> The Performer actually beat the F4B in total HP by a small amount (2.7 HP) 
> and at a lower RPM.
> 
> The F4B was the clear winner above 4750 RPM offering as much as a 30.7 HP 
> gain at 5500 RPM. Note, while I use the term "gain" it is more like 
> "sustain" in that the HP did not drop off as much.
> 
> Tom
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: <wsamouce@kc.rr.com>
> To: <tigers@autox.team.net>
> Sent: Tuesday, April 27, 2010 11:38 AM
> Subject: [Tigers] Small-Block Intake Manifold Survey
> 
> 
> > Not sure if this is a repost or not.
> >
> > Great artical from 1988 on comparing 10 intake manifolds to include the 
> > "Cobra/F4B" and the "Tiger/low rise".
> >
> > I am happy to say that I have a Weiand 7515 on my 260 and it makes the 
> > most power.
> >
> >
> > 
>http://web.archive.org/web/20080415204031/http://www.jason.fletcher.net/tech/intakes/intakes.htm
> >
> > Duke
> > B382002037
> > _______________________________________________
> > Tigers@autox.team.net
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> >
> 
> 
> 
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