Twin Su's On A 3k

[springersrolla]

hey fellas just scored a set of hitachi su's but I'm chasing a manifold cause i got a datsun one.

 

Is anyone running the su's and what size do they run with what jets? Is the performance noticable?

[philbey]

I'll tell you know what all the datsun guys will tell you, throw your hitachis in the bin and (strangely enough) get some British built SU's.

 

They are notoriously hard to work with.

 

Good luck getting a K series manifold, they are fairly sought after. The size you want are 1.5 inch throats, anything bigger wont work with the K engine manifolds (lynx manifold) and will be too big for the car anyway.

[toyota_ae71]

Theres a manifold to suit k-series on ebay now, under 4k

[kickn5k]

I'll tell you know what all the datsun guys will tell you, throw your hitachis in the bin and (strangely enough) get some British built SU's.

 

They are notoriously hard to work with.

 

Good luck getting a K series manifold, they are fairly sought after. The size you want are 1.5 inch throats, anything bigger wont work with the K engine manifolds (lynx manifold) and will be too big for the car anyway.

 

I`ll second that.

People that have owned a set of datsun su`s have told me to get rid of my british built su`s because they, in there experience chased and chased a tune and never got them half right. But i believe that if the linkages were good enough you shouldn`t have too many issues. If they were bought cheap i`d rebuild them find a manifold and try them out.

 

Mine had half an hour on the dyno and two years later mine were still sweet. Although in saying that they have since been removed to play with efi and boost.

i still have my 1.5" su`s and manifold but are not for sale at any price.

 

On my 5K i had .090 mains with a no 6 needle with the 1.5" su

Good luck with it su`s sound awsome!!

 

stu.

[philbey]

Theres a manifold to suit k-series on ebay now, under 4k

 

I also was aware of that but wasn't going to mention it haha....