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View Full Version : Frankenmotor! what heads should i use?



Grafton
03-04-2010, 05:26 AM
I am looking into a cheap HC franken motor to mess with. I plan on squeezing a phase II 2.5 short block between some ej22 heads, the biggest problem i see at this point is that ej22 heads flow like concrete, the phase II ej22 heads arn't as bad as the phase one heads according to nasioc.

but i have a 97 so no phase II heads for me,

i have a choice between dual and single port heads, and the set i choose will be mildly ported so the biggest question is what Phase I ej22 heads flow better? where can i look up the valve size and other info on each head?

impreza_GC8
03-11-2010, 05:26 PM
Personally I would go with dual port heads.

Grafton
03-13-2010, 08:55 PM
yeah that what i am doing, plus using some of my valve train solid vs HLA less resistance

ScaryFatKidGT
03-26-2010, 01:08 AM
Aren't the Phase 1 EJ25 heads like the best flowing N/A heads?

StatGSR
03-26-2010, 09:51 AM
^ true, but sometimes finding a full running 2.5 is expensive while finding a 2.5 block is cheap.

when you use 2.2 heads on a 2.5 block it bumps up the compression substantially and obviously adds the torque of having a 2.5 block.

if you have the parts to do a full 2.5 swap that would be ideal or if you already have a full 2.5 in your car you should not do this, but if you just want to get a little more power and are limited to 2.2 heads you can shove a 2.5 block between them.

ScaryFatKidGT
03-29-2010, 01:48 AM
Give me a turbo engine you can have my heads :)

StatGSR
03-29-2010, 09:22 PM
are you paying attention or just in a little world of your own?

datdookie
03-30-2010, 04:08 AM
been trying to go this route ever since i seen this build. Hope your really going to go through with this because i am still trying to go this route.Can someone please direct me to ej25 short block.

ScaryFatKidGT
03-31-2010, 03:47 AM
I drift in and out...

Grafton
04-01-2010, 01:25 PM
i was lucky i scored a phase II short block for 150, and the heads were 80 so far everything looks good and cheap