I need help

[camaro76_454]

I've just sold my blown 496ci and i want to start building another engine but i dunno yet with which cubic inches should i go with?

Im confused between the 509ci and 540ci and what i wanna do is a street/ strip machine with a hyd. Roller Camshaft and a comp. ratio 10.5:1 or 11:1
and a 200 shot of NOS.i dunno which camshaft should i get and which engine Block

any suggestions?

[pat mccarthy]

a 555/565 would work good but you need good heads

[camaro76_454]

a 555/565 would work good but you need good heads

ok what about the camshaft?

[pat mccarthy]

ok what about the camshaft?

street / strip strip only with Nos???? how much gear how much stall and if you drive it on the street where do you want to be at for rpms how much Cr do want to run race fuel or 10 to1 pump fuel hyd roller cam engine ???? i do see you are saying street ?strip but do you want it just to drive it rarely on the street and about 80% of the time at the track? why i said the 555 or the 565 is they will not cost any more then a 540/548 the 565 is the way i would go and if you want more we have used the 4.375 crank in the short deck 9.800 block to get a 580 the pistons would be customs or i may have a set used . i do have a tall deck 571 short end i would sell it a fair price or a 598. i will be getting some 9.800 blocks soon that can go to 4.600 bore that may need some work and they would be fixed ready to go. i have a machine shop so i can and do alot of big blocks

[camaro76_454]

street / strip strip only with Nos???? how much gear how much stall and if you drive it on the street where do you want to be at for rpms how much Cr do want to run race fuel or 10 to1 pump fuel hyd roller cam engine ???? i do see you are saying street ?strip but do you want it just to drive it rarely on the street and about 80% of the time at the track? why i said the 555 or the 565 is they will not cost any more then a 540/548 the 565 is the way i would go and if you want more we have used the 4.375 crank in the short deck 9.800 block to get a 580 the pistons would be customs or i may have a set used . i do have a tall deck 571 short end i would sell it a fair price or a 598. i will be getting some 9.800 blocks soon that can go to 4.600 bore that may need some work and they would be fixed ready to go. i have a machine shop so i can and do alot of big blocks

yea i will use nos but not all the time ( only at the track) coz 65% of my time at the track and i dont have a tranny yet and the rear end is a 9" with 4.11 ratio. the PRM range about 2500 -6800 RPM Hyd. Roller and 11 to 1 if i can .
what im looking for is a powerful engine that makes more than 650 horses without NOS and if the tall deck is the way to go i dont mind, i can get a 572ci from World Products coz im thinking of getting one of their blocks or anywhere else . So what u think?

[pat mccarthy]

the tall deck would get you cid and TQ low rpms but headers will have to be made if you are going to run this hard and may go past 6500 then go with a soild roller cam you can use a hyd roller cam but them lifters may not want to hang on to the caM LObes at HI RPMs ALL IT TAKES is one time and it will be trash it you are not going to put many miles on it then a soild roller is the way i would go . what do i think of world blocks? any block will hold the power you want to make i have had block s that took over 1000 hp bowties darts and worlds if prep is good they all will take it the dart and world have much more iron in them so they can take a big bore better and the bottom end has more beef so if you are going past 1000hp with a big bore 4.600than them are the ones you want if not then your do not need it they are very heavy

[camaro76_454]

the tall deck would get you cid and TQ low rpms but headers will have to be made if you are going to run this hard and may go past 6500 then go with a soild roller cam you can use a hyd roller cam but them lifters may not want to hang on to the caM LObes at HI RPMs ALL IT TAKES is one time and it will be trash it you are not going to put many miles on it then a soild roller is the way i would go . what do i think of world blocks? any block will hold the power you want to make i have had block s that took over 1000 hp bowties darts and worlds if prep is good they all will take it the dart and world have much more iron in them so they can take a big bore better and the bottom end has more beef so if you are going past 1000hp with a big bore 4.600than them are the ones you want if not then your do not need it they are very heavy

Ok, I think the short deck is better for me. what cubic do u think would be great for my situation? and if the solid roller is the way to go i wouldnt mind.
Do u recommend any cams that will work well with it?

[pat mccarthy]

well the 565 like i said but and i could sit hear and bang away on the keyboad BUT there is a time when you will have to pay someone to build it for you or you will build it so they may like some thing i do not like on cams i like cams that do not kill spring and use many cams makers cams and one that is willing to make me a custom cam

[camaro76_454]

nice informations pat and i appreciate ur time & ur replies

Thanks

[erik erikson]

yea i will use nos but not all the time ( only at the track) coz 65% of my time at the track and i dont have a tranny yet and the rear end is a 9" with 4.11 ratio. the PRM range about 2500 -6800 RPM Hyd. Roller and 11 to 1 if i can .
what im looking for is a powerful engine that makes more than 650 horses without NOS and if the tall deck is the way to go i dont mind, i can get a 572ci from World Products coz im thinking of getting one of their blocks or anywhere else . So what u think?

On any of the low deck BBC that run on pump gas I would try to keep the port volume at 325 cc's or less to keep some of your port velocity.
If you are going to go low deck build a 565.
If you are going to run a 10.20 block build a 598.
The 632 will cost you some more money to build.
The biggest problem problem with the 598/632 is if you run a 24* head you will have to look at some good heads.
On the 598's in street car's we have run the Brodix BB-2 Xtra's that have been CNC'D with really good luck.
I would not run a hyd. roller cam in a 598 I would run a mech. roller.
The hyd. really become to mild in a big cube engine.
In a 565 with the 11. to 1 comp. ratio I would look at some of the largest hyd. cam's out there.
Keep in mind that the power bands are based on a 454 and not a 565.
I have used Crane part number 139661 in a 565.
The specs. are .632/.632 duration at .050 is 256/264 the cam is cut on a 114 l/s.
The heads are the 325 cc Dart's with some port work done to them.
The intake is a Victor with a 1 inch spacer and a flowed 1050 Dom.
This engine with a 250 shot of N20 works great.

[Grumpy 427]

Just my opinion, but i had a Hydraulic roller with nitrous, and i would never have another one. Go with a solid roller even a mild one. If you have good heads, you will need less camshaft. I am building a 468 with a solid roller, and it is a fairly nice roller with soft ramps, easy on valvetrain. My hydroller was all done by 6500 it was floating the valves, it is very hard to spring a hyd roller to run up high.

[erik erikson]

Just my opinion, but i had a Hydraulic roller with nitrous, and i would never have another one. Go with a solid roller even a mild one. If you have good heads, you will need less camshaft. I am building a 468 with a solid roller, and it is a fairly nice roller with soft ramps, easy on valvetrain. My hydroller was all done by 6500 it was floating the valves, it is very hard to spring a hyd roller to run up high.

Like you said 6,500 rpm's.
They will rpm higher depending on valve weight,retainer weight etc.
It has nothing to do with the valve springs it has to do with the hyd. roller lifter it's self.

[pat mccarthy]

well that is what i said with less words

[erik erikson]

well that is what i said with less words

Sometimes I get a little windy.

[Grumpy 427]

You can never have too much explaination lololol