Re: HP Gains & Free Flow Exhaust

[jtrealty@xxxx]

The exhaust system and the cat on the Delorean is restrictive. It is 
technically illegal in the U.S. to tamper or modify anything that 
affects the pollution control systems. That being said the PRV-6 in 
the Delorean will pass ANY state's tailpipe and dyno test without a 
cat.(In fact the manual says to measure ahead of the cat with a hose 
set-up.) The only problem is that they are supposed to visually verify 
that there is a cat on the car. The best way around that is to gut the 
insides of the cat. To probably do the ultimate would be to create a 
true dual exhaust set-up with 2 gutted cats with tuned headers if you 
can manage the room. With a free-flowing exhaust the intake will then 
become the problem with the air box and stove pipe causing the most 
trouble. After dealing with these elements now the CIS will be the 
limiting element. There are a lot of tricks that can be preformed on 
the air mixture unit before you have to consider ripping it off and 
trying to reengineer the fuel system. If you are seriously considering 
EFI look into turbos as they are as close to bolt-on as you can get as 
opposed to EFI. Although EFI has interesting possibilites it is beyond 
the abilities of most mechanics to install. A simpler install is just 
a carburater. I heard of a member of Delorean Midatlantic who put a 
carb on his "D" because he had too much trouble with his Bosch. The 
fellow has since passed on but his "D" is still running!
David Teitelbaum
vin 10757


--- In dmcnews@xxxx, dmc12@xxxx wrote:
> Hi all,
> 
> I have spoken to a couple of people who have had the new free flow 
> exhaust system fitted in the UK and have been told that the 
> difference is very noticeable. 
> 
> I think Cat's were probably still in the early stages of refinement 
> when the DeLorean was being produced and they have probably become 
> less restrictive and so less detrimental to performance over the 
> past 20 years.
> 
> I am having a free flow exhaust fitted to my D hopefully in the next 
> month or so it's about £800.00 including taxes & fitting. If it 
> takes the bhp from 130 to 167 then that works out at an increase of 
> 37bhp at £22 per 1 bhp.
> 
> I will post my findings when I have had the new exhaust fitted and 
> let you know what the difference is.
> 
> 
> James RG
> England