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MSA 2.5" Exhaust System


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#1 JSM

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Posted 12 April 2016 - 04:41 PM

I just installed this and must say the install was breeze. Everything fit like a glove to their header on my 71.

http://www.thezstore...ssic19k/15-6021

Only complaint was trying to find the center hanger for the exhaust. Ended up having to rig it a bit.
1971 240z
1980 280zx
1988 300zxt

#2 jacky4566

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Posted 12 April 2016 - 07:37 PM

Been eyeing this kit. Could you post a video with details on the car?

 

Does the kit just 'stick' together or is there welding required? How do the pipes stay together?

 

I really wish they offered this with a twin tip muffler. 



#3 BluDestiny

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Posted 13 April 2016 - 06:17 AM

It sticks together with The U clamps. Ideally you'd weld t together with vbands or something (actually that would be my preference). Pretty sure it disconnects close to the muffler so you could do anything you want from that point on. 


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#4 HuD 91gt

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Posted 02 May 2016 - 08:24 PM

I'm happy with the kit.  Kit pretty well too out of the box.  I purchased the "Premium kit".


1971 240z - Balanced .040 over L28 w/ Ported P90 head - Colt c542.s cam, SU w/SM needles, MSII (ignition)- LS2 Coils Wasted Spark, MSA Premium Exhaust - 6-3-2 Header

 


#5 princejqman

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Posted 4 weeks ago

Album: 1972 240z
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I also purchased the MSA PREMIUM EXHAUST for Stock Manifold kit  and have been experiencing loud popping at the exhaust on deceleration when lifting the gas pedal on 2nd and 3rd gear. I retarded the timing from 15 to 12 btdc and then to 10 btdc and the issue is still present. It came with an Xcelerator Turbo Muffler, downpipe tuve and 2.5 diameter aluminum pipes. I have a Schneider 274F camshaft and have Heard that people with the stock camshaft have no issues whatsoever.

 

This is really strange as i used to have the MSA TWICE PIPES kit and never experienced any deceleration popping.


Edited by princejqman, 4 weeks ago.


#6 theczechone

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Posted 4 weeks ago

i don't think this is caused by the exhaust and it is quite common on large diameter exhaust with no resonator. My 3.1L stroker motor with a 3" diameter exhaust and a hooker chambered muffler popped like crazy when i tip out of the throttle. what happens is that a bunch of unburned gasoline ends up in the exhaust and self ignites, at least my theory


'71 240z RB25det time attack project     :( 
'72 240z L28e w/ SUs, 5spd summer daily http://forums.hybrid...0z-hls30-50499/

 


#7 princejqman

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Posted 4 weeks ago

What resonator or glasspack is recommended to eliminate the deceleration popping on this MSA PREMIUM EXHAUST? I called MSA and they dont sell this resonator. I just cant stand the popping but do like the drone!



#8 HuD 91gt

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Posted 4 weeks ago

I put a resonator in my system and it just makes it a little quieter :)

The popping comes from your fuel mixtures.  Enhanced by your cam which is less emission sensitive I'm sure.  You may not have this issue with the twice pipes, as the exhaust pulses are split between the pipes.   Each pulse is alternating between each separate exhaust system.

 

My own theory at least.

 

What are you using for carburetors.  Stock needles or modified for your cam?


Edited by HuD 91gt, 4 weeks ago.

1971 240z - Balanced .040 over L28 w/ Ported P90 head - Colt c542.s cam, SU w/SM needles, MSII (ignition)- LS2 Coils Wasted Spark, MSA Premium Exhaust - 6-3-2 Header

 


#9 JSM

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Posted 4 weeks ago

I do have headers. Actually, not long ago I was experiencing popping too. Got worse and worse. I tried adjusting the carbs and it did nothing. Put new plugs in as I didn't recall if they had been done since I bought the car back. No more popping.
1971 240z
1980 280zx
1988 300zxt

#10 princejqman

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Posted 4 weeks ago

I am using ngk BP6ES which is the recommedable one! gapped at .032 and still get that popping on deceleration. i have also adjusted the carb and carb floats and nothing!! Would a 2.5" resonator solve this issue?






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