The Oldfool tried closed exhaust and

oldhead · Post by **oldhead** » Sun Sep 17, 2017 2:18 pm

I went to the track to try pump gas,air filter on and closed quiet exhaust(2 1/2,full length) and had the pulleys turning the Vortech slow. I pull the plugs every run looking for pepper spots or bee-bees. I used RPM to control the boost. Shifting at 6000 (10#) 10:91 / 125.53, at 6600 10:77 / 126.53, at 7000 (15#) 10.70 / 126.63.............(Thinking).............NOTE: The et dropped but not the MPH......Next week first run, the same as 7000, second run open exhaust....I thinking atleast 5 MPH and 2/10s. The carb shooter was not right,causing poor 60s also.....SO WHAT YOU THINK....Oldhead PS: timing was at 32,at 10# pullled 4, Carb was very rich for 22# of boost

oldhead · Post by **oldhead** » Sun Sep 17, 2017 10:39 pm

11 hours and 198 views, not one reply, where are all the smart people?

Oldhead

user-17438 · Post by **user-17438** » Mon Sep 18, 2017 12:27 am

oldhead wrote:11 hours and 198 views, not one reply, where are all the smart people? Oldhead

Too many words and not enough punctuation or breaks/paragraphs..

Maybe you could rewrite what you said in paragraphs. And ask a question and maybe we can respond.. because I have no clue what you are asking vs saying.

user-23911 · Post by **user-23911** » Mon Sep 18, 2017 4:36 am

A vortech
A carburettor.

No boost control?
No knock control?

I often have a good laugh at the track when you see the racers in the street cars revving up the engines in the pits after dropping the exhaust.

They run worse?
Need a retune to run properly without exhaust?
That's if it ran properly WITH it.

427dart · Post by **427dart** » Mon Sep 18, 2017 8:53 am

With the good exhaust components available today there's really no need to go to the trouble of dropping the pipes on a fast street car.
Back in the '60-'70s that was the thing to do and nothing like hearing that Street Hemi or 427 Chevy come to life!

mag2555 · Post by **mag2555** » Mon Sep 18, 2017 9:19 am

I have no idea what your asking either by enlarge!

oldhead · Post by **oldhead** » Mon Sep 18, 2017 9:09 pm

What do you think about opening the pipes and possibly getting 5 mph and 2/10s. I will find out in 4 nights, No make that 4/10s

Oldhead

carmakerevive · Post by **carmakerevive** » Mon Sep 18, 2017 9:21 pm

Wait - Closed exhaust means restricted exhaust?

oldhead · Post by **oldhead** » Mon Sep 25, 2017 10:45 pm

Well 7 days passed ang wentto track (ATCO,NJ) First run was made with no change from last week, second run, opened exhaust 10.23/131.27. Thats what I was hoping for.....

Oldhead PS;Next run went up 8# to 22# of boost 9,24/148

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