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hilta Offline
#1 Posted : Thursday, 31 October 2024 1:21:18 PM(UTC)
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Hi guys, it’s exhaust time, I’m thinking 2 1/4 with lukey mufflers, stainless looking for thoughts on what type and size of muffler etc don’t want drone motor has mild roller cam any video with sound would help, Thanks in advance,
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#2 Posted : Thursday, 31 October 2024 2:17:34 PM(UTC)
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You'll only need twin 2" on a 308, or at absolute worst twin 2.25" back to the mufflers then 2" back from there. You'll want a balance pipe or X-pipe if its a HQ-HJ or similar manifold and/or heads without an exhaust crossover between the heads. If you don't have that it sounds like thongs slapping together. If the engine has an EGR/choke crossover that alleviates the thong slap a lot. I'd be tempted to run a single 2.5" from a pair of 2" engine pipes. Talk to an exhaust specialist that remembers early Holden V8's first though.
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castellan Offline
#3 Posted : Friday, 8 November 2024 9:27:21 AM(UTC)
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Originally Posted by: hilta Go to Quoted Post
Hi guys, it’s exhaust time, I’m thinking 2 1/4 with lukey mufflers, stainless looking for thoughts on what type and size of muffler etc don’t want drone motor has mild roller cam any video with sound would help, Thanks in advance,


Your correct ! even with a stock camshaft 2 1/4 free flowing as you can make it is the go for perfomance ! put a balance pipe on it as well !
Do not go any 2 1/2 they are total shit, drop power like you would not believe and drone like a bastard, especially with a Van.

The Lukey were known to be a deep noise more down low in the rev range. dog leg type muffler.
Oh and extractors with collecters i found best regardless.

I had tossers everywhere in exhaust shops claim i would pick up huge amounts of power with single 2 1/2 they were totaly full of shit ! I lost heaps of power with that crap ! but they were boasting like hell i would pick up huge amounts of power. They all claimed that my twin 2/14 was shit.
Just as the Dyno carby specialist claimed my jetting was to rich and demanded that i could not aford to drive it like that, i said listen Boy I drive 50,000KM a year fool and i could get 22MPG on the HWY sitting on 120km/h. floating up to 140 down some hills. and after that tosser it got 16.5MPG Cause the vacuum advance did not work after he had it and i was the one who found that it was not working. but I had driven to Melbourn and back to G Coast before i found out using my own timing light. then i had to jet it up as it was to lean and running to lean does not give better fuel economy in fact.

So make sure you have Vacuum advance working, it's their for fuel economy ! and jetted the right way to make power. Dyno ect places will not do it the right way, they will make it as lean as they can only and you loose a lot of power because of just that issue.

Same load of BS with the EFI 5.0L V8. Twin exhause rule, look at the last 5.0L VT they had dual exhaust ! the only reason why they had a single exhaust on the VB to VS was only made for one Cat and single exhaust.

The last of the VS with sequencial 5.0L of the VT engine is claimed to be 179KW that is total BS ! Because i owend such a Ute from new and drove a VT 179 and the VT is heavyer than my ute, but a VT would flog my ute easy.
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#4 Posted : Friday, 8 November 2024 1:47:11 PM(UTC)
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Originally Posted by: castellan Go to Quoted Post
..........................
So make sure you have Vacuum advance working, it's their for fuel economy ! and jetted the right way to make power. Dyno ect places will not do it the right way, they will make it as lean as they can only and you loose a lot of power because of just that issue.

Same load of BS with the EFI 5.0L V8. Twin exhause rule, look at the last 5.0L VT they had dual exhaust ! the only reason why they had a single exhaust on the VB to VS was only made for one Cat and single exhaust.

The last of the VS with sequencial 5.0L of the VT engine is claimed to be 179KW that is total BS ! Because i owend such a Ute from new and drove a VT 179 and the VT is heavyer than my ute, but a VT would flog my ute easy.


VB- VK never had cats... they ran fuel 'leaded' style

ULP started on VL, they the first Holden made cars to get cats
Club circuit racing...the best fun you can have with your pants on
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