
to put a 350 or 650 holley
#1
_wraith75_
Posted 25 December 2006 - 10:32 PM
#2
_MYLJ_
Posted 25 December 2006 - 10:46 PM
#3
Posted 26 December 2006 - 12:13 AM
350's suck..and 650 is miles too big....a 202 at 6000 rpm can only ingest about 320 cubic feet of air.
#4
_LX8VD69_
Posted 26 December 2006 - 10:12 AM
#5
_T0rana_
Posted 26 December 2006 - 10:19 AM
#6
_Aquarius - LC_
Posted 26 December 2006 - 03:23 PM
If you really want to use a Holley, then the guys above have given you good advice^^^. Before my tripples i used 320,350,390 &465 on my worked 202,alot of time spent spent trial & error (many dyno runs).


#7
_wraith75_
Posted 26 December 2006 - 05:21 PM

Edited by wraith75, 26 December 2006 - 05:22 PM.
#8
_Bomber Watson_
Posted 26 December 2006 - 06:35 PM
im gonna run su's on my fairly heavily worked 202, should be fine.
so how heavily worked is this 202 of yourse?? some specks would be nice? some peoples ideas of heavy working differ from others

#9
Posted 27 December 2006 - 09:20 AM
(Engine cid X Maximum rpm)/ 3456 So, applying this to your 202 looks like this (202 X 6000)/3456=350CFM This formula assumes 100% volumetric efficency, which very few engines achieve. Assuming a volumetric efficency of 85% something around 300CFM would still get the job done. With vacuum secondaries the engine will tolerate a larger carby, but a 650 looks waaaay too big. A 465 seems plenty big enough, without knowing more engine details.
#10
Posted 27 December 2006 - 09:50 AM
If you have high airflow, it creates a responsive car that meters fuel correctly and everything sorta just works. You MAY loose some top end if teh carby is *TOO* small though.
TOo large carb will be a bitch to tune, and with low air velocity through the venturis cause flat spots and rough running.
I think the 465 would be aboput the best middle ground.. i too hate the 350 holleys!
Cheers!
#11
_Aquarius - LC_
Posted 27 December 2006 - 12:04 PM
Whilst after much tuning i was happy with the overall performance using the 465,the one thing that gave me the sh#ts was poor idle quality! Running a
38/78,295deg camshaft , the manifold vacume at idle was just to low to maintain good airspeed (390 was better).So you end up with a tough sounding lumpy idle, but a car wich tries to stall each time air speed drops to low. Choice of inlet manifold can either help or compound the problem aswell, a swap from a custom (large intake volume) to a redline (much less volume) = more airspeed = better idle & low speed responsiveness, but the engine lost some top end power. So i went back to the custom manifold, raised the idle & got real good at heel toe throttle blips,



This is my experience, alot depends on your engine mods, how much head work,cam choice,exhaust ,the list goes on. If your engine is fairly mild ...i would recommend you consider WW stromberg or 34adm webber (xe-xf falcon).
It's all good fun!!

#12
_wraith75_
Posted 28 December 2006 - 07:59 PM

#13
_Keithy's_UC_
Posted 29 December 2006 - 12:20 PM
I have a 350 Holley on my motor (worked 179) and have made more power than 202's of similar spec with 465 Holleys... And mine runs 14's down the 1/4.
My vote - the Webers!!
Cheers
Keith
#14
_Bomber Watson_
Posted 29 December 2006 - 05:56 PM
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