DeTomaso Mailing List: February 98, Message #13
     



From: 	"Doug Mann" <dmann@dconn.com>

Subject: Re: Manns car

Date: 	Sun, 1 Feb 1998 05:50:11 +0000



Sorry I didn't put all the details in my site.  I don't like to type that much.  

But, I'll tried to give some more info here for the skeptics.



The 704 hp is the conservative every day running power driven at 1:1 with 

no overdrive and not 24 psi.  So that's not the rating at 17% overdriven. 

We can assume and make guesses but I laid down the some real numbers, 

not some bigger numbers I pulled out of the air.  I may have to run the 

boost up to 24 psi and try to beat my top speed.  I've grown to like this 

engine and wanted it to last a little longer.  But I've got a BIGGER 

replacement sitting here already to go in.  So, I know I can pull over 220 

with more boost.



Fancy pulleys?  Nothing fancy.



I'm just wondering how your getting over 700 HP with only 14 psi (double 

atmospheric).  You must be referring to static boost.  Which has no 

place in comparing superchargers and turbo chargers!  apples and oranges.  

It kind of like that wind chill thing them back east guys are always 

complaining about.  



You need to check to see if your gage is coming off the manifold or 

if it is connected to a nozzle facing upstream.  That's the only way you can 

tell the actual dynamic boost in a turbo charger.  It more likely that if 14 psi 

is your static boost then it is more likely your effective boost is more like 18 

psi to get the kinds of HP your talking about.  With the blower you don't have 

the extra velocity that a turbo creates. 



Well as for 0-60, I'm not running no turbo.  The blower is on demand which 

can give you a higher 0-60 than you'll get with your turbos but with a lower quarter.  

Unless your running some really small exhaust housing to get response.  



As for gas mileage a blower is not nearly as efficient as a turbo.  Two 

different animals.  Not sure how you can compare them.  But efficiency was 

never a factor in my equations.  



217 is my top speed, not cruising speed, so running the high rpm for short 

duration is not a problem with my setup.



As far as the reciprocating assembly nothing is stock, duh.  The block is 

only been bored enough to clean it up.  I wasn't going for cubic inches. 



That's enough details for now, my fingers are tired, good night.



D-Mann



-----Original Message-----

From: David Doddek <pantera@pobox.com>

To: Multiple recipients of list <detomaso@realbig.com>

Date: Saturday, January 31, 1998 11:05 PM

Subject: Manns car





At 03:43 AM 1/31/98 +0000, dmann wrote:

>I got your hp right here!  And it ain't no wreck! 

>

>See my "Hot Pantera" web site:

>

>www.dconn.com/users/dmann

>

>The one and only original

>D-Mann

>

>



I read your page and found some things interesting.



You are running a blower up to 24 psi boost and only 700 HP.  I can get

nearly 800 HP with only 14 psi boost with turbos.  This equates to very

heavy blower losses which will really make intake temps high.  You will

have to have some type of fancy pulleys to run the blower also.





You are getting 0-60 in 3.2 but only a 11.4 quarter.  The quarter mile time

should be more in the 10's for that type of 0-60 and your HP rating.



6mpg means you are getting incredable losses.  I get over 20 MPG with the

turbo engine.



if you truely run 217 mph which is possible with 700 hp, (it takes 500 HP

to overcome aerodymanic losses of a pantera ato 200mph) then you are

turning over 8000 RPM.  I wonder how you are getting the block and crank

and rods to stay together at that RPM and HP level.  Your page indicates

Forged blower pistons, but no mention of rods or block over bore.  Lets

have some more details on the engine configuration.



Dave D

Like to meet up with you in Vegas and compare engines.

David Doddek     pantera@pobox.com    www.pobox.com/~pantera    217-422-3722

69 EFI Fairlane, 89 T-bird SC, 74 Twin turbo NOS EFI Pantera #6825

If you are going to go fast, go real fast.