DeTomaso Mailing List: February 99, Message #77

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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