DeTomaso Mailing List: February 99, Message #131

Confirmed - purple on the 600 cfm carb.


>Reply-To: "Melton, Charles P" <charles.p.melton@lmco.com>
>From:	"Melton, Charles P" <charles.p.melton@lmco.com>
>To:	Multiple recipients of list <detomaso@realbig.com>
>Subject: RE: Dyno results
>Date:	Wed, 3 Feb 1999 16:36:15 -0500
>
>I picked up this kit for the PCNC Dyno day.  I'd like to know what 
color 
>spring people are running.
>
>Anyone ???
>
>CM
>
>
>> ----------
>> From: 	Brent Perry
>> Reply To: 	Brent Perry
>> Sent: 	Thursday, January 28, 1999 7:53 AM
>> To: 	Multiple recipients of list
>> Subject: 	Re: Dyno results
>> 
>> Steve,
>> 
>> I'm sure your dyno guy checked for this three times, but it sounds so 
>> familiar I have to mention it anyway.  Was your carburetor all the 
way 
>> open @ WFO? I mean WOT.  If it was, I'm sorry, don't read the rest.
>> 
>> I also am running a Holley 600 cfm vac secondary carburetor.  The 
stock 
>> BLACK secondary spring was soo stiff, the seconadaries were not 
opening 
>> (as evidenced by corrosion and varnish in the secondary fuel bowl).  
A 
>> $15 holley trick kit (secondary spring assortment kit) was installed 
at 
>> the second rebuild and Shazzam.  The car used to barely pull to 5000 
>> rpm, now pulls strong to 6000, where the lifters start to float and 
>> clack.  I think I used the orange replacement spring, or was it 
purple?  
>> Any way it made a BIG difference going from 300 CFM to 600 CFM.
>> 
>> FWIW
>> Brent
>> 4130
>> 
>> >Reply-To: Steve Stone <steve@wds.co.nz>
>> >From:	Steve Stone <steve@wds.co.nz>
>> >To:	Multiple recipients of list <detomaso@realbig.com>
>> >Subject: Dyno results
>> >Date:	Wed, 27 Jan 1999 19:54:16 -0500
>> >
>> >After all the hype on the San Diego dyno day I decided to book in 
#4576 
>> for a tune etc at my local dyno shop. He uses a Dyno Jet - the same 
as 
>> was used on the SD dyno day.
>> >The first run came out at 250.8 RWHP and 301.5 FP torque, with a 
final 
>> top reading of 252.7hp and 303.4 torque. The downer is that the hp is 
>> maxing out at 4,750 rpm. He tells me that is due to my carb being too 
>> small - I have a Holley 600 with vac secs. He replaced the metering 
>> block on the carb but said that is all he can do as he can't get all 
of 
>> the parts here in NZ to uprate the carb.
>> >He has suggested at least a 650 Holley, but as my 600 is almost 
brand 
>> new (was given to me a few months ago when the previous 650 was 
shagged) 
>> I would rather see if  there is any cheap and effective way of upping 
>> the top end flow of the carburettor. 
>> >Is it true that the 600 can be uprated? If so can anyone can tell me 
>> what I need and I will try to source them from the USA.
>> >TIA
>> >Steve #4576
>> >
>> >
>> >
>> 
>> 
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>


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