How much boost?
 

On my 29ft single Fountain I'm running a 509 w/Merlin heads, dual Nickerson 750's, roller rockers & lifters, superchiller intercooler, and MSD ignition. Using pump gas, how much boost can I safely run without getting into trouble

Re: How much boost?
 

What compression, what blower, what cam specs? These items all can make a big differnce.

Re: How much boost?
 

Merlin Aluminum or iron?
Timing?
Compression Ratio?
etc, etc, etc???
More info will be needed...
Dave

Re: How much boost?
 

Merlin Iron heads, Timing currently 34 degrees, Compression 8-1 I believe, B & M 250 Blower, Crane Cam (do not have the specs handy). The motor was built by Teague Custom Marine.

Re: How much boost?
 

With the iron heads, No more than 8psi. I'd back down the timing to 28-30. 34 is to high for a blower motor on todays gas.

Re: How much boost?
 

If The Motor Was Built By Teague Then Call Them,they Would Know With Out Questions!

Re: How much boost?
 

I'm going to call them also. I just wanted to get some feedback from you guys first. As far as the timing goes, 34 degrees is where Teague wants it. I'm currently running 7 lbs of boost at full throttle. Just curious if I could bump it up a bit.

Re: How much boost?
 

Every thing sounds ok . I dont think i would turn it up much more.

Re: How much boost?
 

I am not sure but I do not think that blower is good for much more without building too much heat. After a point you get to diminishing returns. If teague has timming at 34 you might be able to add boost 7 backdown timing but I don't know if you will gain any HP.