rebuild almost done one question

sniperrider · February 20th, 2009, 11:19 PM

so ive been working on this motor for two months now and have it nearly done. here is what i have so far

kb forged pistons
total seal rings
scat i beam rods
clevite 77 bearings
re-ground stock crank and flywheel
this is .30 over by the way

the question is heads i am looking to run 10-12 pounds of boost after a month or two so i am going to want lower comp.

i am thinking afr 185 heads should do the job but not sure and i have already put a 7 qt canton pan with a girdle and windage tray on. the motor is in just waiting one more week for my paycheck to order heads.

any input helps thanks

TKOTLARZ · February 20th, 2009, 11:31 PM

what kind of money r u lookin to spend on heads?u can find some nice trick flows for about a 1000..or try to find trick flow R series around, but thats gonna be some cake for those ones

sniperrider · February 20th, 2009, 11:36 PM

money isnt to big of an issue between 1000-1500 is ballpark and i have trick flow intake setup and 30 lb injectors and all that good stuff

TKOTLARZ · February 20th, 2009, 11:58 PM

i would definitely look into some R series..it will be maybe a little more but brand new heads..or jus look for a lightly used pair..u could probably find those for that range..and no AFR will ever com close to what those heads r..even the best ported afr..those heads are it, doesnt get any better lol they are 225cc, cnc machined an all..check out all the classified on here in "engine"..check each thread..i kno there was a pair of R series for sale..cant remember if they were sold or not

TKOTLARZ · February 21st, 2009, 12:03 AM

and u plan on running 10-12 pounds from a turbo im guessing? ur gonna wanna step up the injector size for sure with that much boost...42's or 48's

Iownastang · February 21st, 2009, 01:21 AM

Originally Posted by TKOTLARZ

i would definitely look into some R series..it will be maybe a little more but brand new heads..or jus look for a lightly used pair..u could probably find those for that range..and no AFR will ever com close to what those heads r..even the best ported afr..those heads are it, doesnt get any better lol they are 225cc, cnc machined an all..check out all the classified on here in "engine"..check each thread..i kno there was a pair of R series for sale..cant remember if they were sold or not

Why would u run trick flow r's on a 306.. Thats way to much head imo .. I would look into a set of standard tw heads or afr 165, 185's. And brand new r series are about double what he is looking to spend. He is not building an all out race motor..

Iwannagofast · February 21st, 2009, 01:27 AM

the 185s would be good without the blower.....i would go probly a 205 if your gonna run the blower tho....its gonna be a beast no matter wat with a built 306 and boost

sniperrider · February 21st, 2009, 02:39 AM

first of all thanx for the input this helps alot and i plan on going supercharged and run however much boost the block can handle its a stock block so im assuming the first thing to go will be the block. and somewhere in the 500 hp range if i make it there with 3:73's in the rear i can really go turbo or charged buyt still leaning for charger. and the t-5 lol but i looking into the t-56 soon after it goes. ill post pics of the engine bay when i can and try to take some of engine, but any more suggestions are more than welcome.

Iwannagofast · February 21st, 2009, 02:56 AM

with a 205 head with the right cam and intake with 12 psi will easily be over 500 rwhp

sniperrider · February 21st, 2009, 03:03 AM

k i figured. i had a local cam shop grind me a pretty close replica of the comp blower cam. but i plan on running a .600 lift cam for the hell of it until i save up for the charger that way i can give the motor a thorough break in period and be loud and roudy for the time being

M L Struck · February 21st, 2009, 10:59 AM

one thing I see is what KB pistons do have flat's , domes, what?

sniperrider · February 21st, 2009, 12:37 PM

they are flat's i was going to go dished to lower comp but figured that by getting a bigger head and running flats i could allow more airflow.

89LX347 · February 21st, 2009, 02:08 PM

Originally Posted by Iwannagofast

with a 205 head with the right cam and intake with 12 psi will easily be over 500 rwhp

he does NOT need 205 heads, please dont give information if you dont know what your talking about.

89LX347 · February 21st, 2009, 02:11 PM

Originally Posted by sniperrider

they are flat's i was going to go dished to lower comp but figured that by getting a bigger head and running flats i could allow more airflow.

go with some AFR 185's, thats all you will need. also i do not recommend kb pistons for boosted aplications, especially 10-12 ppunds, they always break because of the high silicone content. invest in some probe pistons that will last you. and i doubt you will get the proper compression ratio with just a bigger head.

sniperrider · February 21st, 2009, 06:34 PM

i will keep that in mind for next time around but i already have kb pistons in so ill give them a whirl but afr 185's should do what im looking for right? and the 10-12 thing is just at the track or whatever ill keep the boost down to around 5-8 lbs or so daily

89LX347 · February 21st, 2009, 07:06 PM

Originally Posted by sniperrider

i will keep that in mind for next time around but i already have kb pistons in so ill give them a whirl but afr 185's should do what im looking for right? and the 10-12 thing is just at the track or whatever ill keep the boost down to around 5-8 lbs or so daily

yes the 185's will be plenty. alright good luck, hopefully your block will outlast your pistons!

keep us updated on how it works.

February 20th, 2009, 11:19 PM	#1
sniperrider Regular Join Date: Apr 2007 Location: olympia washington Posts: 396 iTrader: 0 reviews	rebuild almost done one question so ive been working on this motor for two months now and have it nearly done. here is what i have so far kb forged pistons total seal rings scat i beam rods clevite 77 bearings re-ground stock crank and flywheel this is .30 over by the way the question is heads i am looking to run 10-12 pounds of boost after a month or two so i am going to want lower comp. i am thinking afr 185 heads should do the job but not sure and i have already put a 7 qt canton pan with a girdle and windage tray on. the motor is in just waiting one more week for my paycheck to order heads. any input helps thanks __________________ 90 lx hatch

February 20th, 2009, 11:31 PM	#2
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	what kind of money r u lookin to spend on heads?u can find some nice trick flows for about a 1000..or try to find trick flow R series around, but thats gonna be some cake for those ones __________________ Cohagan Engineering, Inc.

February 20th, 2009, 11:36 PM	#3
sniperrider Regular Join Date: Apr 2007 Location: olympia washington Posts: 396 iTrader: 0 reviews	money isnt to big of an issue between 1000-1500 is ballpark and i have trick flow intake setup and 30 lb injectors and all that good stuff __________________ 90 lx hatch

February 20th, 2009, 11:58 PM	#4
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	i would definitely look into some R series..it will be maybe a little more but brand new heads..or jus look for a lightly used pair..u could probably find those for that range..and no AFR will ever com close to what those heads r..even the best ported afr..those heads are it, doesnt get any better lol they are 225cc, cnc machined an all..check out all the classified on here in "engine"..check each thread..i kno there was a pair of R series for sale..cant remember if they were sold or not __________________ Cohagan Engineering, Inc.

February 21st, 2009, 12:03 AM	#5
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	and u plan on running 10-12 pounds from a turbo im guessing? ur gonna wanna step up the injector size for sure with that much boost...42's or 48's __________________ Cohagan Engineering, Inc.

February 21st, 2009, 02:39 AM	#8
sniperrider Regular Join Date: Apr 2007 Location: olympia washington Posts: 396 iTrader: 0 reviews	first of all thanx for the input this helps alot and i plan on going supercharged and run however much boost the block can handle its a stock block so im assuming the first thing to go will be the block. and somewhere in the 500 hp range if i make it there with 3:73's in the rear i can really go turbo or charged buyt still leaning for charger. and the t-5 lol but i looking into the t-56 soon after it goes. ill post pics of the engine bay when i can and try to take some of engine, but any more suggestions are more than welcome. __________________ 90 lx hatch

February 21st, 2009, 03:03 AM	#10
sniperrider Regular Join Date: Apr 2007 Location: olympia washington Posts: 396 iTrader: 0 reviews	k i figured. i had a local cam shop grind me a pretty close replica of the comp blower cam. but i plan on running a .600 lift cam for the hell of it until i save up for the charger that way i can give the motor a thorough break in period and be loud and roudy for the time being __________________ 90 lx hatch

February 21st, 2009, 10:59 AM	#11
M L Struck Hardcore Enthusiast 85 GT/86 SVO/2010 GT500 Join Date: Oct 2008 Location: Rossville IN Posts: 1,183 iTrader: 0 reviews	one thing I see is what KB pistons do have flat's , domes, what?

February 21st, 2009, 12:37 PM	#12
sniperrider Regular Join Date: Apr 2007 Location: olympia washington Posts: 396 iTrader: 0 reviews	they are flat's i was going to go dished to lower comp but figured that by getting a bigger head and running flats i could allow more airflow. __________________ 90 lx hatch

February 21st, 2009, 06:34 PM	#15
sniperrider Regular Join Date: Apr 2007 Location: olympia washington Posts: 396 iTrader: 0 reviews	i will keep that in mind for next time around but i already have kb pistons in so ill give them a whirl but afr 185's should do what im looking for right? and the 10-12 thing is just at the track or whatever ill keep the boost down to around 5-8 lbs or so daily __________________ 90 lx hatch

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