melena2009

i dont know if this is in the wrong place.. i have a holley 650 double pump and im trying to use in a 13b single turbo everytime i build boost i have a lot of gas coming out from the top of the metering plate wat can i do to fix it or set it up for boost any information will be helpful..thank you

any help please

70ghiavert

You have to modify the Holley to utilized it for a blowthrough set-up. I suggest you do an internet search or check in the 1st Gen section. This link shows modifications for an edelbrook: http://www.theturboforums.com/smf/in...topic=136075.0

wickedrx2

650 holley blowthru was the same set up i was running i did all the modifications and was hitting from 17 to 20 psi without any problems running a 60-1 .96 ,, first thing what have u done to the carb to run boost , i removed the choke butterflies and rod and use a epoxy to seal the hole where the rod comes thru , , ull need to put plastic floats , i ran no power valve so installed a plug , run 50cc accelerator pump on pri and sec,, i bought moroso metering block reusable rubber gaskets , make sure u run a fuel injection fuel pump with a rising rate regulator set to around 7-9psi,. ull need a wideband to tune
hope this helps
julio

melena2009

i took out the choke butterflies and rod n cover the little whole..i have metal float and a 65power valve on primary side ,nothing in secondary ..wat kind of jet you running in primary n secondary to have an idea wat size should i be getting ,right now i have 63 primary n 67 secondary

idk wat size accelerator pump i have yet i should check that tomorrow

wickedrx2

Those metal floats have to be replaced with plastic ones. The metal floats will crush under boost. Jetting I ran 67-70 on pri. And. 80-90s on sec I can't give u an exact number because it depends on your set up, what size turbo , how cold or hot the weather is And how much boost , I was running 17 psi on 9.4 t2 block. On a 60-1 turbo. The motor was street ported , Just to give u an idea. . Like. I said before you'll need a wideband to see where ur at
Julio

melena2009

Yeah i now i shpuld be buying mew ones this weekend..i have a 13b cosmo the one with the big port im running a t2 turbo is like 60 right now over here .the wide band is the air/fuel thing right if im not mistaken

dekam 1

i ran a early 13b 4 port with a mild street port, single t3-t4 turbo with .92 hot side and a 750 demon carb. ran 18lbs with no problems.

christiondavid

take a peak here, http://www.hangar18fabrication.com/blowthru.html this site helped me out alot, and with tuneing and problems this site http://www.theturboforums.com/smf/index.php vent whistel i think thats whats called they go on your metering blocks that keeps the fuel from over flowing into your carb i have thoes plus j tubes thoes are found on marine carbs theres a guy on ebay selling thoes j tubes, good luck.

melena2009

Thank you for the help car ran good with the blowthrough ..but i blew on apex seal soo is time for a big street port n big turbo