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Deceleration popping at exhaust with new MSA Premium exhaust


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#141 DaBlist

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Posted 13 June 2017 - 09:53 AM



I have an ac system installed with no compensator.

 

Compensator?

 

1685647d4d86e001f8a7899377e33b94_zpsspxj

 

Oh, an idle solenoid


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#142 jalexquijano

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Posted 13 June 2017 - 11:46 AM

Just confirm i am doing the tune up procedure correctly. I start at 2.5 turns clockwise and have reached 3.5 turns on both fuel mixture knobs. The idle and balance were already set. Colortune is not giving me the precise mixture.

#143 Lockleaf

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Posted 14 June 2017 - 06:39 PM


Compensator?

1685647d4d86e001f8a7899377e33b94_zpsspxj

Oh, an idle solenoid


Holy crap that made me laugh.

Half Pint ('71 510 Goon) http://community.rat...agon/p?=1269361

 

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#144 hang_510

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Posted 15 June 2017 - 08:31 AM

I have an ac system installed with no compensator.


Cool, butt a compensator would stop the pooping.

"I can spend time working on the Dattos, or wasting money at the strip club. You make the call." :D


I'll put on chain mail and a dirt bike tire jock strap and drive it!!!!!


#145 datzenmike

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Posted 15 June 2017 - 11:07 AM

Almost 8 full pages. Was the lack of AC compressor the cause? 


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#146 jalexquijano

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Posted 07 July 2017 - 08:45 AM

i will be taking the car to the muffler shop again. I found a leak between the stock manifold and downpipe. maybe ill seal it better using permatex high temperature silicone and the felpro gasket alltogether.



#147 datzenmike

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Posted 08 July 2017 - 06:02 AM

Silicone isn't recommended for use on exhaust manifolds. They say it's only good to 650F. A car's manifold can easily get twice this but over 650 is normal. Use dry gaskets specifically the meta-lized ones made for high heat.


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#148 jalexquijano

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Posted 20 July 2017 - 01:58 PM

Okay so no exhaust leaks! System less restrictive? What if i install a resonator to cancel the deceleration popping? If it is feasible where and which Brand?



#149 datzenmike

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Posted 21 July 2017 - 05:28 AM

Resonators are designed to tune out objectionable exhaust noise through a specific range to complement the muffler used. Like getting rid of an annoying drone at cruising sped. I don't think this will help popping much. For that you need a muffler that better absorbs it.

 

Did you try turning the idle speed up slightly?


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#150 mhub91

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Posted 21 July 2017 - 05:37 AM

Dude.... Nobody cares.

It seems like you're very difficult to please. God help those poor people who have you as a customer.

#151 jalexquijano

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Posted 24 October 2017 - 07:23 AM

popping continues. Im still wondering why it did not popped on deceleration when it had the MSA Twice Pipe system installed. If i decide to go to the stock muffler with resonator how many hp will i loose?



#152 G-Duax

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Posted 24 October 2017 - 07:24 AM

Dude.... Nobody cares.

It seems like you're very difficult to please. God help those poor people who have you as a customer.


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#153 jalexquijano

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Posted 24 October 2017 - 08:32 AM

How many HP wil i loose?



#154 Stoffregen Motorsports

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Posted 24 October 2017 - 08:40 AM

6.375 hp will be lost by adding a resonator.

 

Seriously though. If HP is your biggest concern, don't do it. If you want it to be quieter, install a resonator and find out. You're not going to lose enough to notice.



#155 distributorguy

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Posted 24 October 2017 - 09:41 AM

Right now you're losing ALL your hp by not driving it...



#156 Ranman72

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Posted 24 October 2017 - 04:23 PM

6.375 hp will be lost by adding a resonator.

 

Seriously though. If HP is your biggest concern, don't do it. If you want it to be quieter, install a resonator and find out. You're not going to lose enough to notice.

here is a perfect answer please move forward to the next question  :devil:  :devil:  :devil:  :devil:



#157 hang_510

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Posted 25 October 2017 - 08:24 PM

the MSA Twice Pipe system installed. If i decide to go to the stock muffler with resonator how many hp will i loose?

Loose them all!

MSA???
CM: Oh, yeah, they were really nice people, man. And so much class, man...they had so much class, y'know. It's like, Santa Claus used ta have this really charp chort, man, y'know? It was lowered to da ground, had twice-pipes, candy-apple red and button top. Oooo, clean!

TC: Hey, that sounds like a hip snowmobile, man

CM: No, no, it wasn't a snowmobile; it was a sled, y'know.

"I can spend time working on the Dattos, or wasting money at the strip club. You make the call." :D


I'll put on chain mail and a dirt bike tire jock strap and drive it!!!!!


#158 qwik510

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Posted 27 October 2017 - 02:41 AM

popping continues. Im still wondering why it did not popped on deceleration when it had the MSA Twice Pipe system installed. If i decide to go to the stock muffler with resonator how many hp will i loose?


I just skimmed through all 8 pages of this thread, OYE!



In my 240z, before the LS1 swap, I had a nicely built L28 engine with SU carbs and MSA Header and sport exhaust kit. It also popped on deceleration. Like you OP, I didn't like the sound. I added an inline resonator and the noise was much subdued but not entirely gone. Made it much more tolerable. I didn't notice much of a drop in power. But then 200hp was not enough, hence the LS1 swap.

Sorry but I don't recall which resonator I added. It was too many years ago. I did get it on eBay. I believe it was 16"-18" long.

Also, I've determined, I'm not a hoarder, I'm a collector.
As I'm sure a lot of the old school datsun guys are.



Enjoy the Ride!


David



1972 Datsun 510(Pete Brock's 510)
1977 Datsun 620 King Cab (Barn Find)