You could order them with factory dual exhaust which was 2"...I think from memory. Most of the vans i saw back when I worked in spares at a GMH dealer came with a single exhaust though and dual were fitted aftermarket.
You could order them with factory dual exhaust which was 2"...I think from memory. Most of the vans i saw back when I worked in spares at a GMH dealer came with a single exhaust though and dual were fitted aftermarket.
I think I am repeating but our original red van was single, and still was when we bought it, we have changed it to dual though....Originally Posted by GTS
and the GMH guys told us what GTS said as well
HZ Jasmine Yellow Windowless Sandman, now being driven everywhere and is finished!
HZ Madeira Red Windowless sandman now Sold to Bigrob
HX Mandarin Red Sandman Ute finished, and club registered
1979 HZ malachite windowless van with 308 5spd, all chromed up and shiny finished and named "The Player"
Married to RodneyHZ253
The twin system must have been an expensive option in the day.
From memory twin was only available on sedans. All the rest only came with singles.
I'm not sure how you guys put up with a Holden V8 with twin pipes without a balance pipe. They cackle and drone something horrid. They sound heaps better with a balance pipe at the right spot or better still a single 2.3 or 3" with the right muffler.
I agree with you on the balance pipe. I reckon a two in two out muffler that acts as a balance sounds good. The complete twin system with no balance sounds like a boat motor i reckon. They are good for working out which bank the burnt out valve is on though!
Each to their own though. The main thing is all v8's sound good but Holden V8's sound the best by far. Got a nice revy note.
From what I can tell in the sevice manuals/parts books for HQ's you could get dual system on sedans (Option N10) but can't see any reference for utes/vans - but my books are pre 1974 so pre Sandman.
I know it's an old thread!!!
Rang an exhaust guy today to inquire about the cost of a standard exhaust for a HZ 308.
He told me that they ran 1 7/8" twin pipes into a 1 5/8" single, through a 1 5/8" muffler and then out through a 1 5/8" tailpipe.
When i asked him about how small the system was, his reply was that they used smaller pipes for more torque back in the day.
My question is:
If it ran a so small system, wouldn't it restrict the flow of the exhaust?
Also i thought that a that it would have been twin a single 1 5/8" THEN into a 1 7/8" collector?
BO6 = Rarer then a Sandman
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks