Thread: 385 fast burn crate engine 350ci

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whats the maximuim lift that will not affect vacum brake booster???

Originally Posted by junior2

whats the maximuim lift that will not affect vacum brake booster???

You can always buy a vacumm reservoir.
I doubt you will need it.
I say try and if they are hard to push then look into buying one.
Thet are about $75.
There are a lot of variables that will affect this it is a very difficult question to answer.

so if i were to get a lift of 0.575" / 0.595 and a duration of 0.234° / 0.242°.
i should be ok running air condition and vacum brake booster with no problems? or will i have problems on brakeing

No problems isn't quite the answer I'd give. Buying the biggest cam you can find usually causes sacrifices elsewhere. Here are the specs on a virtually identical cam from Crane:

ROUGH IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, MILD BRACKET RACING, AUTO TRANS W/3000+ CONVERTER, 3800-4600 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500

This is not a very streetable cam, so I have no doubt you will have vacuum problems with it. However the fix isn't difficult. This engine is going to be a bear to drive on the street, but if that's what you want - go for it.

Originally Posted by junior2

so if i were to get a lift of 0.575" / 0.595 and a duration of 0.234° / 0.242°.
i should be ok running air condition and vacum brake booster with no problems? or will i have problems on brakeing

Take 10 * of both the intake and exhaust side at .050 so say 224/232 run a 3,500 stall and a 4.10 gear that way you will be safe with power brakes.

Erik,

He says he has a 6-speed and 4.56 gears.

Originally Posted by Henry Rifle

Erik,

He says he has a 6-speed and 4.56 gears.

I am really having a bad day.
On post number 45 he says 3.73.
I give up!!!

I think all the information that can be provided has been provided. Good luck on the build.

yes i did update on the gear it will be a 373.i know im frustating you guys with too many questions. but i do appreciate your help thats for sure. i am no pro in combos nor will i ever be lol. i am just a parts replacer with the correct info i can but anything together but with the help of pros like you.
i feel that no one can accomplish so much by himeslf, unless he has torn that puppy down several times to get it right.if you have on the first shot and with no ones help then good for you. i know i cant so im sorry to fustrate you guys.and i will be using a 6spd tranny the only thing i changed was the gear. i thought it was a 4:56 i was wrong after swaping it out last week.its been a while since ive toyed around with my old monte carlo.

Junior,

What we've been trying to say is that first time builders think the way to go is to find the biggest cam they can fit. Often that doesn't give the best horsepower in the range you want to drive. A fairly heavy car on the street that only pulls hard from 3500 - 7000 RPM isn't much fun to drive and it eats gas. You get the lumpy idle, but you can't get away from the light as fast as one of our little rice-burner friends. If you try to get "up on the cam" you just fry the tires.

My advice would be to use the FB engine with the Hot Cam. You'll have excellent performance with reasonable street manners. Think about the early muscle cars. Very few of them could compete with a 440 HP engine.

Again, I'm not bagging on your choice. It's just that I've been there and done that - and so have a lot of my friends.

Originally Posted by Henry Rifle

Junior,

What we've been trying to say is that first time builders think the way to go is to find the biggest cam they can fit. Often that doesn't give the best horsepower in the range you want to drive. A fairly heavy car on the street that only pulls hard from 3500 - 7000 RPM isn't much fun to drive and it eats gas. You get the lumpy idle, but you can't get away from the light as fast as one of our little rice-burner friends. If you try to get "up on the cam" you just fry the tires.

My advice would be to use the FB engine with the Hot Cam. You'll have excellent performance with reasonable street manners. Think about the early muscle cars. Very few of them could compete with a 440 HP engine.

Again, I'm not bagging on your choice. It's just that I've been there and done that - and so have a lot of my friends.

If he does install a larger cam he may be able to "hook-up" the car better because he has moved the torque band up the rpm scale.
With his manual tranny this might work better.

Good catch. I just think a .600 lift / 300+ deg cam in a Monte on the street is going to be "interesting" to drive.

Originally Posted by erik erikson

If he does install a larger cam he may be able to "hook-up" the car better because he has moved the torque band up the rpm scale.
With his manual tranny this might work better.

[QUOTE=Henry Rifle ]Good catch. I just think a .600 lift / 300+ deg cam in a Monte on the street is going to be "interesting" to drive.

ok guys your brains have all the calculations in mind with these two responses. im very slow but when you elaborate a little more ill catch up quick. you wont even know if its the sam idiot that was asking the questions.
ok guys im going to refresh my brain, and refresh your brain with what i have.
and give you two options that im looking at nothing else.this is what i got. which one would the pros choose?
what would HENRY RIFLE AND ERIK ERIKSON choose for there street toy (daily driver)some what daily driver.
put it this way if your other car broke down would this be your back up for the week.

385 create engine 385hp/385tq
1987 montecarlo ss weight 3600-pound
3:73 rear gear / with a 6spd out of a camaro

what im looking at are two cams
hot cam durration I: 2 18 E : 2 28 lift I: 5 25 E : 5 25/w "1.6 Rocker" 112

other cam
12370847 = durration I: 2 34 E : 2 4 2 lift I: 539" E : 558"/w1.5 rockers 112
please read carefully i want to add the 1.6 rockers to this cam which will give me a higher lift
being max lift with 1.6 rockers added instead of 1.5 rockers will be 0.575" / 0.595 (w/1.6 ratio rocker

which out of these two are yall recomending because i got confused on the (.600 lift / 300+ deg cam) stated by henry.. thanks guys for putting up with me

Originally Posted by Henry Rifle

Good catch. I just think a .600 lift / 300+ deg cam in a Monte on the street is going to be "interesting" to drive.

intresting meaning to much for what i want. or intresting as in bad boy in the streets but cant be streetable? im spining my little brain here lol

I would do the hot cam with the FB385, 1.6 rockers. "Interesting" ( with respect to the big cam) means I wouldn't want to drive it regularly on the street.