7K Hydraulic Or Solid Cam

[Willow Ke55]

Hi, I'm building a 7k with son & am trying to decide to go solid conversion or stay hydraulic. As we're stuck with the 7k head I'm trying to find accurate info on what parts have to be use & if parts are available to go solid ie lifters & correct rods & cam profile, or is it best to stay hydraulic & whats best hydro setup with cam & head to use one a moderate street engine not a race engine. Cheers for any help.

[GJM85]

If it's EFI I'd leave it stock unless your going with a tuneable EMS.

 

If it's carburettored, you could keep it standard hydraulic gear. Get your original cam reground with a midrange hydraulic profile, get the stock lifters surfaced and have your rocker posts machined accordingly to maintain correct valve lash. This would avoid the pain in the arse head/pushrod/lifter nightmare so many find themselves in. Keep the rest of the engine standard with the exception of a decent set of headers and exhaust.

 

If you have all the pollution spaghetti still intact, keep it all as original as possible. "Pollution gear" as its referred to is like a self tuning vacuum operated computer system. Contrary to popular belief these spaghetti systems self regulate fuel mixtures utilising temperature and dynamic vacuum pressures and 90% of the system is enrichment device. The only real detriment is the EGR system which you'll need to blank if you go with extractors.

 

If your not having any of it I'd suggest getting a tuneable carb. Weber DGV for instance.

 

Last recommendation would be having your distributor recurved to suit the new application.

Edited October 29, 2015 by GJM85

[coln72]

Stay with a hydraulic cam. Sooo much less stuffing around, and with a regrind you will have more than enough revs for the street.

[Willow Ke55]

Thanks for that info , great help. Would heavy duty springs for head be of help, & i will be going the twin sidedrafts with headers & 2in exhaust ,Electric fuel pump & dizzy, thermo fan with alloy. radiator. Lighten fly wheel with Hd clutch in a k50 for now. Hoping the k50 will hold up as we're not going to be punishing it. Just want it to pull firmly, look & sound nice.