Quiet vacuum pump for big cam motors with power brakes.

[cataclysm80]

Do stroker engines typically have big cams and vacuum problems?

[chal340]

I put this hydrauboost from Hydratech on my Challenger. Very nice product and very nice service.
A buddy put a diesel vaccum pump because he don't have power steering. He made some brackets and installed it in place of the power steering.

[chal340]

Another solution, put an alternator vaccum pump. You can find them in all diesel japenese cars.

[61K T/A]

I may have to go this direction but would like to mount it in the engine bay somewhere and not worry about longevity issues.

That was my concern too (longevity) but then I thought about adding a shield to it. This is just to prevent road debris form directly hitting the pump. I did this to one of my trucks when the fuel pump cam lobed got wiped and then installed an elec. fuel pump to the frame rail adjacent to the front tire. I use some scrap aluminium diamond plate and worked out well.

I never did go that route since I decided to install a Hydoboost system.

[HP_Cuda]

Yeah I was thinking that as well but the guy who sells them also says to keep them away from heat.

So building a shield could also potentially turn it into a heat sync. I'll have to play around with placement and see.

I may have to go this direction but would like to mount it in the engine bay somewhere and not worry about longevity issues.

That was my concern too (longevity) but then I thought about adding a shield to it. This is just to prevent road debris form directly hitting the pump. I did this to one of my trucks when the fuel pump cam lobed got wiped and then installed an elec. fuel pump to the frame rail adjacent to the front tire. I use some scrap aluminium diamond plate and worked out well.

I never did go that route since I decided to install a Hydoboost system.

[MoparDave]

we put one of those hydroboost on this one with a 472 crate hemi

[Cuda Cody]

The stroke will not have much to do with it as much as the cam design.  Big cams will cause the problem. 

Do stroker engines typically have big cams and vacuum problems?

[HP_Cuda]

Long duration cams and to a lesser extent overlap kills vacuum.

When the piston is headed do a intake downstroke that is where vacuum is made. The four cycles are intake, compression, power and exhaust.

The duration holds the valves open longer and somewhere near the apex overlap happens where both intake and exhaust are open. The good part is that it creates more power the downside is you lose in the vacuum department.

[chal340]

The Hydroboost in my Challenger. I put black hoses between power steering pump and the Hydroboost.

[303 Mopar]

I may have to go this direction but would like to mount it in the engine bay somewhere and not worry about longevity issues.

That was my concern too (longevity) but then I thought about adding a shield to it. This is just to prevent road debris form directly hitting the pump. I did this to one of my trucks when the fuel pump cam lobed got wiped and then installed an elec. fuel pump to the frame rail adjacent to the front tire. I use some scrap aluminium diamond plate and worked out well.

I never did go that route since I decided to install a Hydoboost system.

I mounted a vacuum pump in the trunk of my '71 and hid it behind the battery.  Again, this was a very loud pump and I would suggest another alternative.

[Chryco Psycho]

Another vote for hydroboost  if you have power steering anyway this is an easy addition

[cataclysm80]

You guys make the hydroboost sound pretty good.

I'm still fond of the way the original disc brake master cylinder looks though.
Tough call...
I need to figure out what front disc brake setup I'm going to run .

[61K T/A]

Another vote for hydroboost  if you have power steering anyway this is an easy addition

My car was manual steering. The bracket and pump install was easy. Just had to make sure I bought the right pump. The pump on average needs to out 1300psi.

[chal340]

Another vote for hydroboost  if you have power steering anyway this is an easy addition

My car was manual steering. The bracket and pump install was easy. Just had to make sure I bought the right pump. The pump on average needs to out 1300psi.

what's the average of the stock pump?

[61K T/A]

The Hydroboost unit loves pressure *(up tp 2600psi). If your running both power steering and brakes and a low pressure pump you will not have any advantage from a HB system. The maximum benefit from the unit would be running a pump rated for 1350psi. Any higher and you will blow your seals. The pressure drop from the prop valve to the rear brakes is significant. So if your running low a pressure pump you might as well stick with a vacuum booster.