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Old 10-14-2003, 08:10 PM
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4 bbl carb on 327

hi all.


i have 1969 camaro 327 with stock 2bbl.
engine was rebulit 1989 .30 bored over.

i just got a 350 SS intake(1969 #'s)

holley 650 vac. sec. carb ready to go.

do i need to change cam too?

i like the way it runs now. just want 4bbl for fun.

thanks for all that reply.


mike

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Old 10-14-2003, 08:13 PM
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Trade the Holley for a Carter/Edelbroick carb and you are all set. However a nice short duration, hi lift RV cam would do wonders to wake it up.
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Old 10-14-2003, 08:14 PM
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No! You don't "have to".
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Old 10-14-2003, 08:33 PM
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There is absolutely nothing wrong with a 650 Holley, if it is in good shape. I would leave it vac secondaries, but I would buy a set of springs for it so you can tune the secondaries. The intake you have, while it is not a high performance aluminum intake, it will perforem quite well. Sounds like you are trying to lo buck this, and that is OK.

Vince
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Old 10-14-2003, 08:35 PM
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what's wrong with holley carb??

4175 model , i only paided $190 for it and it got shinny finsh too.
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Old 10-14-2003, 08:36 PM
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Shiney is VERY important.....................................
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Old 10-14-2003, 08:43 PM
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No! You don't "have to".
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Old 10-14-2003, 11:16 PM
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don't worry about what poncho said as everyone has their preferances on carbs and will never agree. Holley's are easily tune able for max power which is why the racers usally like them. I don't want to get into my options of the +'s and - of them all cause everyone disagree's on most things anyway. All I will say is a vac secondary holley should work just fine for you. As for the cam it will work fine with the 4 barrel you just would be able to take better advantage of it with a different cam most likely but even will the same cam you will have quite an increase in power.
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Old 10-15-2003, 06:03 AM
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Your little 327 that runs good with the 2 barrel carb will almost drown with just adding a 4 barrel intake and carb. To have the fun you want, you need some larger valve heads and yes, a litttle more cam, and a better than stock exhaust system to balance out all the fuel and air you are going to pump into it. Your present 2barrel setup is around 210 HP. 300 (by the era measuring system) is not hard to reach.

Trees
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Old 10-15-2003, 06:05 AM
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Some would get along a lot better in this forum if they were not so condescending.

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Old 10-15-2003, 10:57 AM
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That 650 vac sec. will be fine . Your sec side might need a spring change to get the most out of it. But at normal cruising around it will only be working off the primaries. Yes it would benefit with a cam change and free flowing exhaust and heads, it just matters on how much you want to spend.
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Old 10-15-2003, 03:02 PM
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ok thanks for input guys.


i think i'll get a high performance aluminum intake,

new cam too , i am looking at a 280/290 blue racer.
if you got a better cam in mind plz let me know.

i got dual chambered exhaust on now.
but got stock headers, maybe i'll change them.

heads are not cheap, that will be last thing i buy.
can i find used ones better than mine and what should i look for?

thanks again all

mike
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Old 10-15-2003, 04:02 PM
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I think you mean a 600 vacuum secondary. It's an 1850 right?Those work just fine on a 327 with no mods. Just tune it.

It is usually the people who have never bothered to take the time to correctly tune a Holley that trash talk them. I got news for those types... Tuning your car is a fact of life with a hot rod. The definition of hot rod should be: A car that you work on more than you drive.
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Old 10-15-2003, 07:52 PM
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lluciano77

hey its a holley 4175 650 spreadbore w/ vac. sec.

i hope its not too much carb for the 327.

but if i get better cam my friends said it will be ok.
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