DeTomaso Mailing List: February 98, Message #56
     



From: 	MikeLDrew@aol.com

Subject: Re:  Sv: Intake manifold/carburettor

Date: 	Mon, 2 Feb 1998 04:20:13 +0000



Cristiano wrote to me,



>Thanks a lot for your advice, Mike, it helped me a lot. 



Just about how much extra power will the Performer intake give me?



>>>Here, let me look in my old club newsletters.  PCNC had a dyno day in 1992

where we took a bone-stock L-model Pantera (with its lower compression ratio,

open-chamber heads), and did back-to-back tests with different intake and

carb combinations.  The intent was to progressively add bigger and better

intakes and carbs, but unfortunately the car suffered a completely random

electrical short (the wire for the electric choke, which runs through the

passenger side rocker panel, shorted out in there and caused a small

electrical fire!) and the test ended.



Here were the results we gained, though.



        |  Intake --> |      Stock       |    Stock      |   Performer  |

 Performer

        |---------------------------------------------------------

        |   Carb -->  |       Stock      |    600 Vac     |  600 Vac    |

  600 Econo

        |---------------------------------------------------------

RPM  |  3000      |       158        |      162          |    167         |

    169

        |---------------------------------------------------------

        |  4000      |        191       |       202         |     206

       |      210

        |---------------------------------------------------------

        |  5000      |        205       |       222         |     232

       |      232

        |---------------------------------------------------------

        |  5500      |        198       |       220         |     230       |

      230

        ---------------------------------------------------------

                                              HORSEPOWER



Remember that we were testing with an engine with less potential than your

Euro GTS (your motor has much higher compression, and thus makes more power

out of the box.)



In this particular example, an Edelbrock intake was worth about a

10-horsepower increase across the board over a stock intake with the same

Holley carb.  Remember, though, that the 'stock' intake had been machined to

accept the Holley, and thus was more optimized than your intake/carb combo.

 If I was a guessing man, given that you'd be going from a mismatched

carb/intake combo to an Edelbrock, both on a more-powerful motor to begin

with, I'd expect to see at least a 15 hp increase, maybe 20, maybe 25???



On the last test, we switched from one 'performance' 600 cfm carb to an

'econoline' 600 cfm carb (both by Holley) and the change was so tiny as to be

insignificant.



Hope this helped (and hope the chart I made above comes out okay!)



Mike