DA150 and Greaves Tune Pipes

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Bully · 01-29-2007, 08:13 AM

I was wondering if you could possibly help me as I have been looking at posts on a chat room where people have been explaining about the sizes of the pipes on engines. What are the lengths of the pipes for a DA150 engine and Greaves tune pipes? People are saying that they are 9 ¾ with an additional inch between the manifold and the pipe. Can we butt joint them and make them 10 ¾ inches or is this wrong? Please could you reply back to this email address explaining how and what I should do. Also another quick question, what size prop was on the engine?

Many Thanks

Chris Bull

Rolling Thunder · 01-29-2007, 10:12 AM

That sounds about right. I am only running a 1/2 gap but I have the pipes on a floating mount so they can expand back instead of forward. but the 10 3/4 total header length is the correct measurement, I put in a slight throttle curve and now I have very smooth transition and great power.

shannah · 01-29-2007, 10:38 AM

The 1/2"-1" gap is there to make sure you don't get any contact between the pipe and header. If they touch, the metal on metal grinding creates a lot of RF noise. Whatever you end up with, the total length is 10.75"

People are running the Mejzlik 32x10 two blade and the Mejzlik 28.5x12 with this header length.

01-29-2007, 08:13 AM	#1
Bully Flyin' Around Join Date: Oct 2006 Location: Burton on trent Age: 31 Posts: 6	DA150 and Greaves Tune Pipes I was wondering if you could possibly help me as I have been looking at posts on a chat room where people have been explaining about the sizes of the pipes on engines. What are the lengths of the pipes for a DA150 engine and Greaves tune pipes? People are saying that they are 9 ¾ with an additional inch between the manifold and the pipe. Can we butt joint them and make them 10 ¾ inches or is this wrong? Please could you reply back to this email address explaining how and what I should do. Also another quick question, what size prop was on the engine? Many Thanks Chris Bull

01-29-2007, 10:12 AM	#2
Rolling Thunder Tony Quist Join Date: Jan 2006 Location: Glendale, AZ Age: 48 Posts: 1,492	Re: DA150 and Greaves Tune Pipes That sounds about right. I am only running a 1/2 gap but I have the pipes on a floating mount so they can expand back instead of forward. but the 10 3/4 total header length is the correct measurement, I put in a slight throttle curve and now I have very smooth transition and great power.

01-29-2007, 10:38 AM	#3
shannah Bad-ass Super Contributer! Join Date: Jan 2006 Location: Orange County CA Posts: 233	Re: DA150 and Greaves Tune Pipes The 1/2"-1" gap is there to make sure you don't get any contact between the pipe and header. If they touch, the metal on metal grinding creates a lot of RF noise. Whatever you end up with, the total length is 10.75" People are running the Mejzlik 32x10 two blade and the Mejzlik 28.5x12 with this header length.

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