Thread: 385 fast burn crate engine 350ci

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Originally Posted by erik erikson

I really hope you will be able to fill my shoes.

Filling your shoes is the easy part.....

The Hot Cam setup from GM is an excellent upgrade. The Fast Burn heads will take that cam - even with the 1.6 rockers. Porting and polishing Fast Burn heads for a street car is a waste of money, unfortunately. About all that is recommended is light sanding to remove casting imperfections and a light polish of the exhaust ports and combustion chamber. It's a heck of a solid engine.

The X-pipe or a crossover will help your low-end torque a little bit, and usually gives the exhaust note a unique sound.

I'm curious why you want the choppy idle. Do you want performance, or are you just interested in trying to impress your friends with the sound? True hot rodders won't be impressed.

Originally Posted by Henry Rifle

The Hot Cam setup from GM is an excellent upgrade. The Fast Burn heads will take that cam - even with the 1.6 rockers. Porting and polishing Fast Burn heads for a street car is a waste of money, unfortunately. About all that is recommended is light sanding to remove casting imperfections and a light polish of the exhaust ports and combustion chamber. It's a heck of a solid engine.

The X-pipe or a crossover will help your low-end torque a little bit, and usually gives the exhaust note a unique sound.

I'm curious why you want the choppy idle. Do you want performance, or are you just interested in trying to impress your friends with the sound? True hot rodders won't be impressed.

Thanks Henry Rifle a decent reponse, ive had some friendly thread hijackers.
henry i want a gone in 60 second shelby sound but with hp to back it up.
There is another cam i would like some feed back on. What hp will it give me,
can i use this cam on this crate engine.
p/n 12370847 hyd roller I:234 E:242 @.050 lift I:539 E:558 lobe center 112
Will that cam give me more chopy sound and hp? Will any of these cams give me detenation im told to be carefull with detenation. Im all ears at this point
Im trying to get ready for my march assemble, dont want to blow my engine.
What cam would you recomend for my engine.

Hey, now wait just a minute!!!! I had that position at least a year before either of you showed up!!!!!! I should at least get to decide who my replacement is......

Originally Posted by junior2

Thanks Henry Rifle a decent reponse, ive had some friendly thread hijackers.
henry i want a gone in 60 second shelby sound but with hp to back it up.
There is another cam i would like some feed back on. What hp will it give me,
can i use this cam on this crate engine.
p/n 12370847 hyd roller I:234 E:242 @.050 lift I:539 E:558 lobe center 112
Will that cam give me more chopy sound and hp? Will any of these cams give me detenation im told to be carefull with detenation. Im all ears at this point
Im trying to get ready for my march assemble, dont want to blow my engine.
What cam would you recomend for my engine.

Scoggin Dickey uses that cam in their ZZ465, along with 1.6 rockers. However, you would have to upgrade from the stock springs on the FB385 heads to handle the higher, more aggressive lift. Should give more HP and the lopey idle you want, but it's pretty radical for the street. Power band is going to move more toward the high end at the sacrifice of low end torque. That may not be what you want on the street.

A little advice. Most first time builders way over-cam their engines, thinking that the lopey idle gives them status and horsepower. That doesn't always work. It may give horsepower, but it only gives status to posers (not insinuating that you are one.) Hotrods are systems. The gearing, weight, camshaft, compression ratio, head flow, carburetor and ignition system have to be designed to work together. Put too much cam in that car, and it will eat gas, and won't have the grunt on the low end on the street where you need it.

What car are you putting it in? What carb are you using? An engine that starts pulling at 3000-3500 RPM in a heavy street car is not fun.

Originally Posted by Henry Rifle

Scoggin Dickey uses that cam in their ZZ465, along with 1.6 rockers. However, you would have to upgrade from the stock springs on the FB385 heads to handle the higher, more aggressive lift. Should give more HP and the lopey idle you want, but it's pretty radical for the street. Power band is going to move more toward the high end at the sacrifice of low end torque. That may not be what you want on the street.

A little advice. Most first time builders way over-cam their engines, thinking that the lopey idle gives them status and horsepower. That doesn't always work. It may give horsepower, but it only gives status to posers (not insinuating that you are one.) Hotrods are systems. The gearing, weight, camshaft, compression ratio, head flow, carburetor and ignition system have to be designed to work together. Put too much cam in that car, and it will eat gas, and won't have the grunt on the low end on the street where you need it.

What car are you putting it in? What carb are you using? An engine that starts pulling at 3000-3500 RPM in a heavy street car is not fun.

henry there are two cams im thinking about one is the hot cam kit,
http://www.crateenginedepot.com/stor...02-P497C0.aspx and the other is the
http://www.crateenginedepot.com/stor...7-P1146C0.aspx p/n 12370847 hyd roller I:234 E:242 @.050 lift I:539 E:558 lobe center 112
This cam comes by its self im asuming i can use the hot cam kit with this except the cam of the hot cam kit. Hope i make sense. I have a 750 holley
http://www.crateenginedepot.com/stor...06-P445C0.aspx
fuel pump http://www.crateenginedepot.com/stor...12-P442C0.aspx
I have a 1987 montecarlo ss

Junior, if you are serious about getting the best cam for what you have, give Cam Motion a call. They will make YOU a cam that is matched to every component on YOUR car. Part numbered cams are o.k. but a custom cam built around what you have and what you want is unbeatable. It takes all the guess work out of matching components and what will work and what won't.

Originally Posted by junior2

I want a "gone in 60 second shelby sound" but with hp to back it up. Will that cam give me a more chopy sound and hp?

A cam can give you a more raspy sound and more h.p. but you might want to look at mufflers for sound, as in the Super 40 series. Mufflers add a lot to the sound quality but another factor is compression. Compression will add volumes to the quality of the sound as well as h.p.

Assumptions sometimes result in broken parts. I'm not sure that the Hot Cam kit springs will accommodate the larger cam. Call the supplier and ask him - or go to a custom cam grinder as suggested above. Lots of cam suppliers will have a cam that will fit your application.

Originally Posted by Dave Severson

Hey, now wait just a minute!!!! I had that position at least a year before either of you showed up!!!!!! I should at least get to decide who my replacement is......

Dave,I am sorry.
I will give the title back to you.
My uncle use to say "I would rather be a smart a-- than a dumb a--".
Well I guess he would say darn near anything.

Originally Posted by junior2

Thanks Henry Rifle a decent reponse, ive had some friendly thread hijackers.
henry i want a gone in 60 second shelby sound but with hp to back it up.
There is another cam i would like some feed back on. What hp will it give me,
can i use this cam on this crate engine.
p/n 12370847 hyd roller I:234 E:242 @.050 lift I:539 E:558 lobe center 112
Will that cam give me more chopy sound and hp? Will any of these cams give me detenation im told to be carefull with detenation. Im all ears at this point
Im trying to get ready for my march assemble, dont want to blow my engine.
What cam would you recomend for my engine.

If you look at cams that have a narrow l/s they will tend to have a rougher idle than a cam that is ground on a wider l/s.

Thanks guys for the input, out of these two cams i mentioned. Which one would yall go with if it was your engine build up. IF i go with the bigger cam i would have to do some research for the springs.

erik erikson Quote:
(If you look at cams that have a narrow l/s they will tend to have a rougher idle than a cam that is ground on a wider l/s.)

Im not sure what your telling me on the cam. I also dont want a really rough
idle that will bust my ear drums,and knock my teeth out. I quess i justy want a little lope sound. I just might go with the hot cam kit its all been figured out to just slap in with a 425hp dont know if it will gain torque or drop torque. The motor already produces 385lb of torque at bottom end, whith
this hot cam dont know where it will put me at..

With the Hot Cam and 1.6 roller rockers, the FB 385 becomes a clone of the ZZ430, which is supposed to make 430 HP / 430 lbs-ft.

Henry i see you too have a 385 fast burn but with more hp. what hp are you at and what cam did you use ? I was reading on the post of the vacum advance deal being to high. I myself had that problem when timing me engine,
but now i know why.

385FB with the Hot Cam & 1.6 Roller Rockers, stock FB385 springss