a cast iron adaptor plate??
 

so i have a HF manni and a T25 turbo, and for some reason its just not sealing too good with just the bolts holding it everything together, so i thought i could some how find 3/4 in thick plate of cast iron and just weld the bastards together instead of just using bolts??? how does that sound??? or would i be better of just trying the hi temp sealant that i've heard will just melt and creat a good seal between the adaptor plate and the manni and the turbo??

Re: a cast iron adaptor plate??
 

What kind of adapter plate are you using now? Whatever you have you can weld it, rather than getting another adapter plate and welding it.

Re: a cast iron adaptor plate??
 

if you use the bolts to hold it on then you dont even need to worry about good penitration just make sure it is sealed

Re: a cast iron adaptor plate??
 

I have the same problem, but I forgot to put the gasket on the bottom of the hf mani. You can get one at your honda dealer for like $12 or something. ;D

Re: a cast iron adaptor plate??
 

I tried welding an old steel adapter to a cast hf manifold, and trust me...don't even bother. Even with an arc welder with some heavy duty rods the welds still broke and leaked like crazy, not to mention warped the turbo mounting surface from the heat. Try doubling the gaskets if you have to.

Re: a cast iron adaptor plate??
 

ive welded quite a few things to hf manifolds and everything has held

Beau

Re: a cast iron adaptor plate??
 

I bet you used a torch to heat the cast iron first no?

Re: a cast iron adaptor plate??
 

I would try making a thin metal gasket first. That is the cheapest way. Just use a soda can. :6

Re: a cast iron adaptor plate??
 

have have done it too...and no...but after a while of welding on it, that mother was hot ;)

Re: a cast iron adaptor plate??
 

Even heating with the torch, the welds would hold for a little while, but eventually would end up cracking on me. Bad penetration for some reason i guess.