does anybody have any flow numbers for a set of merlin vr marine heads? these are the 310 cc rect ports. would like to know what stock flow numbers are and the best place to start porting to get improvements!! would like to get real world numbers to plug in desktop dyno!!! thanks...

try the web site , if they have one .

i tried the website but they dont have any in depth info... anybody know of any other sites that might cover that type stuff?

Don't have flow numbers but when I replaced the stock Merc HP465 heads my boat slowed down. I'm thinking bigger cam needed now...

Heres a good one compares a bunch of common heads

http://www.chevyhiperformance.com/ed...=745&aid=41598

Stock I believe the intakes flow about 320 at .6. Heres a nice set of oval ports that are mildly ported, fresh ready to go. $2195.00 or best offer.

Rod

I have a set I am going to pull off my motor. I am going to take & have flowed when I get them off next week. Looks like friday before I get my AFR's flowed. I am wanting to do a comparison between the 2 sets. I was told (see thread on common lies) by the engine builder that he had ported them. I have found out the other things he has told me were wrong so I do not think he touched these heads. I will make a new post when I get them done.

I'VE GOT 2 SETS OF RET, MERLIN AND 1 OF ALUIM BRODIX FOR SALE CHEAP !!!! IN GREAT SHAPE WITH VALVES 99 TO 103 CC'S
WILL BRING UP COMP. IN 330'S ECT ......PM ME FOR CHEAP PRICES

JimV has all the #'s where are you Jim???????

If you put on heads with to big of runner ports you will hurt the performance on the motor . Big runners for big cubic motors !!