Thread: 385 fast burn crate engine 350ci

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Comp cams makes the thumper cams now.Garanteed to make it idle like a top fueler at the burger stand!!

You can get that lumpy idle just by messing up the carb. Sound or power. Which is better?

Originally Posted by Henry Rifle

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

so all you did was install the hot cam itself, on the 385 fast burn crate engine. So there is no need for the spings, you know what i didnt even cross refrence those springs. They are the same springs then right ill check. So
how does she sound henry better yet take a video of it and send me a short
clip.

The cam and the 1.6 roller rockers. Nothing else is required.

so how does she run

Originally Posted by junior2

so all you did was install the hot cam itself, on the 385 fast burn crate engine. So there is no need for the spings, you know what i didnt even cross refrence those springs. They are the same springs then right ill check. So
how does she sound henry better yet take a video of it and send me a short
clip.

I would have your valve springs checked.
By adding 1.6 rockers you will add approx. .030 more lift.

Henry Rifle is right all i need is the cam and 1.6 rockers. I doubled checked the spring part # on the hot cam kit, which comes with springs keepers etc.. I also checked the spring part # on the 385 fast burn and they are the same just 1.6 rockers added and the hot cam p/n 24502586 to the kit the rest is the same .

henry how does you 385/ 425hp 425lb torque run???????????

Mine isn't running yet. However, I have a couple of friends with the same engine, and saw one run on a chassis dyno. They run great.

Erik,

I guess checking would be OK, but it's the same combo Chevy put in the ZZ430, and they used the stock FB385 heads. Same with Scoggin Dickey. Their tech folks say the springs are fine, and the heads will take a .525 lift.

You can't put 1.6 rockers on the exhaust valves STOCK FB385 camshaft, though.

I thought that was "I would rather be a smart a*^ than a dumb f$#@." Anyway...that ZZ430 is a cool motor. I know of a Vega with one that really runs strong.

Found this site and i kind of like the hp out of this engine. The 385 fast burn crate engine has a bigger cam than the hot cam and seems to put out 465hp
and 440 tq. http://www.sdpc2000.com/catalog/1578...ate-Engine.htm The question is what cam is this in the engine what P/n is it. Is it a gm cam or aftermarket cam. What do you think henry will this be my choice of cam it sound good to me but want the pros advice. Will i be able to just slap my cam in the 385 fast burn and 1.6 rockers and be good or will i have to look into springs. what about the lift clearand on the head. Has anyone done this on the fast burn. If i can get some great input on this zz465
this is the way i want to go with my stock 385 fast burn. Thats mor than enough hp for my monte carlo for street and some track...

I was looking at the zz465 crate engine which is basicly the same engine as the 385 fast burn,and the zz430, they are the same crate engine but with different cam.
Correct me if im wrong. I have a 1987 monte carlo ss that im going to put this engine in. It will be a streetable not daily driver but some what. Behind this engine i will have a 6sp tranny out of a 96 camaro stock, 4.56 gear. I im looking for that thump rough idle sound but not sure if 465 hp will be good too much hp in the street hope not. I had the 385 running on my mc and i was craving a more chopy sound and some what more hp. But dont know which cam will give me my desires and balance out with the 385 fast burn, well the hot cam p/n 24502586 with the 1.6 rockers will as a slap in. But will the 12370847 I:234 E:242 lift I:539 E:558 1.5 rockers be just as good as the hot as a slap in only. Will it balance out right, and will i turn some heads streetable .

Short answer . . . NO. Max lift on the FB385 is 0.525. If you go to that larger cam, you need to replace the springs, and it would be VERY smart to check the valve-to-piston clearance.

ok valve springs would have to be replaced. the valve springs on the fast burn are the p/n 12551483 = 1.32". if i went with the biger cam p/n 12370847 i would need 1.250" Diameter but i tried to find the spring part number and i cant. can some one help me figure out what springs i need with this cam. i think this is all i need if i were to go to the biger cam 234/230 duration and 539/558 lift.

update on the rear gear 3.73 posi with some clucth pack in the middle.