The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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PostPosted: Mon Sep 05, 2016 2:51 pm 
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Joined: Fri Aug 13, 2010 8:50 pm
Posts: 567
Location: newton abbot, south devon
I'm to build a 1500 exhaust manifold and was wondering What size primaries you'd suggest. The engine has a pretty high lift cam, flowed head and is very shiny and pretty. I've made rover v8 manifolds before and used 1 1/2" pipe and have enough left, is it too big and therefore will slow down the gasses too much? I have all I need to build the manifold so would rather not have to spend out again but will if absolutely necessary.
Input please.


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PostPosted: Tue Sep 06, 2016 7:37 am 
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Joined: Tue Oct 03, 2006 5:52 pm
Posts: 7564
Location: Halifax, West Yorkshire
The Spitfire 1500 tubular manifold would be a good place to start. As some of us already know, it can't be used on the Dolomite because it fouls the subframe. It would be useful a a guide for the primaries and would cut out some of the guesswork.

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Toledo Man

West Yorkshire Area Organiser & forum moderator
Meetings take place on the first Wednesday of the month at 8.00pm at The Old Brickworks, Wakefield Road, Drighlington, Bradford, BD11 1EA

1972 Dolomite 1850 auto (NYE 751L - Now for sale)
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - another project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint) plus 5 Acclaims and that's just the Triumphs!

Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.

"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle


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PostPosted: Tue Sep 06, 2016 10:27 am 
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Joined: Fri Aug 13, 2010 8:50 pm
Posts: 567
Location: newton abbot, south devon
I've found out that with 1 1/2 primaries they'll need to be 11" long before a y connector.


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