Twin Su's Question

[crispyke35]

Hi there

 

Just a question regarding twin su's. today i was told i could have a pair of 1 1/4 inch su's if they fitted my car. just wanting to know if they'd be suitable for my 4k engine. also can you get manifold's to suit the engine or would i need a custom made manifold?

 

Cheers Jacob

[Redwarf]

Yes they'd be suitable for a mild 4K. IMHO 1.5's would be better.

 

Yes you can get manifolds, however can be hard to come by, as I don't believe they're available new any longer. Custom woud be ludicrously expensive, you may as well bung Webers on.

 

Hope this helps.

[crispyke35]

Yes they'd be suitable for a mild 4K. IMHO 1.5's would be better.

 

Yes you can get manifolds, however can be hard to come by, as I don't believe they're available new any longer. Custom woud be ludicrously expensive, you may as well bung Webers on.

 

Hope this helps.

 

 

Cheers for the info. i wouldn't mind twin webers but i still want to conserve some fuel and my wallet.

 

I'm not in any great rush to put them on so should be able to source a manifold if you can still get them.

 

Does anybody know how much of a difference running twin su's made to there car ?

[Redwarf]

They're a good inprovement. IMHO better than the 32/36 Weber conversion that most people do. You must however get them set-up properly, and dyno time is preferable. DCOE's are the next step up, and not for the faint hearted in relation to dollars.

[crispyke35]

They're a good inprovement. IMHO better than the 32/36 Weber conversion that most people do. You must however get them set-up properly, and dyno time is preferable. DCOE's are the next step up, and not for the faint hearted in relation to dollars.

 

Probably a stupid question but what are DCOE's. also just had a look on ebay and it seems twin weber manifolds to suit a 4k are much easier to come buy.

[Redwarf]

40mm DCOE side draft Weber. Also 40mm DHLA Dellorto. Same thing, vaguely. They bolt to the same manifold.

 

Yes, those manifolds are easier to come by. Hell, I think you can even pick them up new. But unless you've done head/ Cam etc, and (I have three sets of them, so this is an honest figure) feel like spending $1000 to set them up properly, I wouldn't be looking at them.

 

SU's are a nice compromise, but you wont necessarily find a manifold in a day.

[crispyke35]

40mm DCOE side draft Weber. Also 40mm DHLA Dellorto. Same thing, vaguely. They bolt to the same manifold.

 

Yes, those manifolds are easier to come by. Hell, I think you can even pick them up new. But unless you've done head/ Cam etc, and (I have three sets of them, so this is an honest figure) feel like spending $1000 to set them up properly, I wouldn't be looking at them.

 

SU's are a nice compromise, but you wont necessarily find a manifold in a day.

 

 

Thanks heaps for the info.

 

looks like i'll just wait till i find a manifold. still got plently of other work to do in the mean time.

 

Cheers Jacob