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

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.

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 ?

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.

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.

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.

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