ported early heads versus standard vn heads
#1 _ass308_
Posted 30 October 2008 - 06:14 AM
Im stroking it to a 355,and always planed on useing vn heads.I know vn heads are better in the long run,and spent last night going through nearly every page,of the engine forum.
My question is this,CAN an old head be ported to flow as much,as a STANDARD/SLIGHTLY worked vn head.im not asking which is better
Again i know the vn heads are better,and am prepared to spend the money,on them,and the manifold,extractors,and the rest of it.but with my budget the vn heads would only be standard,or slightly worked,at best.I can save myself a shit load of money,by just doing more port work to the old heads,re useing my own gear.The old motor was a beast
i want at least 450hp/400+of torque from the motor.surely pre vn peoples had 308's running around with this much hp.
Any opinions welcomed,i have till saturday arvo to decided,motor to built,by early december,and it will be put on a dyno,before it goes in the car.looking forward to seeing what it can do.
#2 _rookie_
#3
Posted 30 October 2008 - 05:42 PM
Yes.
Long answer has been covered here before.
Welby
#4 _ass308_
Posted 30 October 2008 - 05:53 PM
#5 _lx-304_
Posted 30 October 2008 - 07:13 PM
#6 _rorym_
Posted 30 October 2008 - 09:44 PM
The winner for me?..We did a light intake port job...left exhaust standard......and I was bolting on..basically...stock standard VN heads with valves up one size to breath.(I went 2.02 inlets and 1.65 exhaust).....No brainer for me. Flowed 510......Bonus!!
R
Edited by rorym, 30 October 2008 - 09:45 PM.
#7 _HatchmanSS76_
Posted 31 October 2008 - 06:15 AM
#8 _ass308_
Posted 31 October 2008 - 04:26 PM
#9 _rorym_
Posted 31 October 2008 - 06:17 PM
after hours of trolling through the forum,and speaking to peeps,ive decided to hang the cost and go the vn heads.u only live once,and i only want to build the car once,so ill do it right 1st time
Exactly my line of thinking as well....now...get ready to scare yourself WITLESS!!...with a big grin on your face!
R
#10 _HatchmanSS76_
Posted 31 October 2008 - 11:56 PM
after hours of trolling through the forum,and speaking to peeps,ive decided to hang the cost and go the vn heads.u only live once,and i only want to build the car once,so ill do it right 1st time
Ah, you are a wise one grasshopper
#11
Posted 01 November 2008 - 11:22 AM
#12 _ass308_
Posted 01 November 2008 - 01:44 PM
compucam h286
compucam h304
http://www.cranecams...eet_14-5-07.pdf
im leaning towards the 304,the engine builder is leaning towards the 286.any opinions ?.cam and componets will be ordered on monday,so not much time to decide.btw my diff ratio is 3.25 lsd,and im running a turbo 350.
as per usual love to hear your opinion if u wana give it
#13
Posted 01 November 2008 - 03:25 PM
standard vn heads 500hp approx
good luck with the rebuild !
#14 _moot_
Posted 01 November 2008 - 08:52 PM
#15 _rorym_
Posted 01 November 2008 - 10:50 PM
R
#16 _ass308_
Posted 02 November 2008 - 08:01 AM
a stroker with a 286 cam rough rev range 2000-5500
a stroker with a 304 cam rough rev range 2500-6000
a stroker with a 288 cam rough rev range 3300-7000
i dont want any more than a 3000 stall,max
#17 _moot_
Posted 02 November 2008 - 10:08 AM
for instance my old 308 with the 286 made peak power at 6500rpm,and the 355 with the 288 made peak power at 6200rpm.
buy a good convertor.we drive cars around on the street with 5500rpm convertors and there babies to drive and dont slip or get hot. you can still drive around at 2000rpm with a 5000rpm convertor.
#18 _ass308_
Posted 02 November 2008 - 10:37 AM
#19 _rorym_
Posted 02 November 2008 - 11:52 AM
R
#20 _moot_
Posted 02 November 2008 - 12:11 PM
a motor with the same specs above made 505hp and ran a 10 in street trim first pass.
#21 _ass308_
Posted 02 November 2008 - 05:32 PM
im locked in to the 1 5/8 extractors atm.at a later stage ill get the 1 3/4.ill leave the valves standard.i really want to run a hydrolic cam if i can.dont want the hasle of setting valve lash.what size stall did that guy run?.i think thats a little to full on 4 me.ill start with something a bit smaller.i can always at a later stage i can always change cam,manifold carb.
stay tuned,ill see how close i get to the 505 hp.
#22 _mumbo_
Posted 02 November 2008 - 05:56 PM
#23 _rorym_
Posted 02 November 2008 - 07:02 PM
R
#24 _SS Hatchback_
Posted 08 November 2008 - 07:23 PM
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