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Going to build a bad ass 420inch SBC for gas would like to make 950-1000HP on the juice..(run a high 8 in a 3200lb 67 camaro)

Is it worth going to an 18deg head and make that extra 80-100HP with better heads, or just build a good 680-700HP 23deg engine and spray it the rest of the way.

No parts have been purchased yet
 

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I HAD A 406 23 DEGREE HEADED SBC THE HEADS WERE A SET OF 220 ALUMINUM PROACTIONS FROM RON'S PORT SERVICE FLOWED 307 ON THE INTAKE SIDE WITH A 700 LIFT CAM AND IT MADE 652 ON PAT MUSI'S DYNO ON MOTOR AND A 1000 ON SPRAY IN A 10 INCH TIRE CAMARO AT 3300 AND IT WENT 8.71 AT 158 HOPE THIS HELPS DON'T EVER LET ANYONE TELL YOU IT WON'T RUN......THANKS TO MONTE SMITH YOU ARE THE NITROUS KING....


 

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I say stay with the 23's very easy to get parts I haven't seen a whole of gain on spary vs the 18's and the 23's easier to tune. Modified street car 3 yrs ago run low 40's and high 30's with 235 RHS heads. I have seen 900plus with 23's to the rear wheels, plate only. Hope this helps
 

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i make 660 hp on a 421 with ported afr 220 23* heads . have been [email protected] with no tranbrake and street converter. on a small 200 shot. should be good enough for 9 teens or better with ease. the 18* head will make more power but will cost alot more to do so. and most of those heads love to turn some rpm which will mean more maintnace. but i think with either combo you can run high 8s no problem
 

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SOFA KING WHAT?
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Just went 5.82/118 on a 150 shot at 3150 on 275's. Had 10 degrees of timing coming out, trying it again tonight with a little more timing in it and cleaner fuel side.

23 degree Eddy Victor RR Heads by RFD

410 cu in
 

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I'm shooting for the same thing, high 8's, with a 23* AFR 227 head and a standard deck 400ci Iron Eagle with a single fogger. From all the reading I've been doing around here it shouldn't be a problem.
 

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Going to build a bad ass 420inch SBC for gas would like to make 950-1000HP on the juice..(run a high 8 in a 3200lb 67 camaro)

Is it worth going to an 18deg head and make that extra 80-100HP with better heads, or just build a good 680-700HP 23deg engine and spray it the rest of the way.

No parts have been purchased yet
a well built 420ci sbc with a set of good 23* heads should make around 750 hp. add just a 28 pill tune up and you will excede your 1000hp goal.
however, if you think you want to run LOW 8's with the car then you will need a lot more motor and/or nitrous. so, think of your long term goals and build it right the first time.
as far as the maintainance with the higher rpm 18* stuff. with a dedicated nitrous engine this becomes less of a factor because you do not have to rev it to the moon the get it to make good power on the juice.
 

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What Punisher#1 said ^^^^.
My 414 SBC with Brodix 11X heads went low 10's on motor, high 8's on a .030N jet, no trans brake, 3300lbs, 30 x 10.5 tire.
 

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a well built 420ci sbc with a set of good 23* heads should make around 750 hp. add just a 28 pill tune up and you will excede your 1000hp goal.
however, if you think you want to run LOW 8's with the car then you will need a lot more motor and/or nitrous. so, think of your long term goals and build it right the first time.
as far as the maintainance with the higher rpm 18* stuff. with a dedicated nitrous engine this becomes less of a factor because you do not have to rev it to the moon the get it to make good power on the juice.
? I turn my 18 degree motor less rpm's than my 23 degree
 

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High to Mid 8's is easy, I have a 415 inch 23 degree small block. Went out a couple weeks ago with 350 in the fogger and I had a pretty conservative tune in the progressive. Went 5.59 to the eighth, let off at 5.92 seconds which I figure was probably around 750 to 800 feet and coasted through at 9.58 @ 98 mph.:rolleyes:

So hitting the 8's should be fairly easy.
 

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Spend your money once and just go 18,15,or 13*. Dont waist your time and money on 23* stuff it just wont make the same power. Ya ya ya you can make good H.P. with 23* stuff but you should always make more with 18*s. Yes there are 2 killer 23* heads that will make the power to go low 8s high 7s but they cost 15* $$$$. Just some of the positives going to 18* is the intake setup, larger intake valve, better chamber for less dome on the piston.
 

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Yes, your goal is achieveable with the 23*. What you need to think about is how fast youw ant to go in the future. Youwill hit a brick wall as far as performance goes with the 23* stuff on the hit as you can only stuff so much nitrous through a given port, and since the 23* stuff is on the small side, you will run out of room with more spray. The smaller angle stuff works great and can run the same if not faster with the same hit, which can then be stepped up later on when more power is desired. If the budget is tight, go with the 23*. If you can swing it, go with the 18*. If you plan on going faster later on, you already have the potential to do it and you didn't spend a ton of money going to 23*'s first then switching to 18*'s. Just be carefule when using the real small angle heads like 15* and 13* as the smaller the chambers are, you really need to be on your game with the tune up, espcially with high compression or you will hurt parts. The 23*'s with the big chambers are a bit more forgiving. You have the ability to make roughly 750, maybe a bit more with a good 23* without spending a ton to get tricky with them and make more, and you can then run 275-325 hit with them and achieve your goal. It also depends on how heavy the car is and if you need more power n/a to help it. At 3200lbs you should have no problem like everyone has said, running a 23*.
 

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I've been 5.72 @122 or 8.9 @151 With a 383 and 23* heads.

If your buying heads and shaft mount rockers spend the money once and step up to a better head. If you never want to go faster you can do it with 23* stuff. The extra 30+ cubes you have over me is a nice benifit.
 

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I've been 8.37 @ 163 and 5.35 @ 130 at 3340 pounds with my 23* headed motor. Its 436" with AFR 227's and a 2 stage plate.
love your sig " that used to be fast" :smt082 :smt082 ha ha ha
these guys are getting so fast it just blows me away at the skill and dedication racers have. yer fast dont kid yourself. I have only been 5.40's @ 128 and 8.60's with a single stage plate , no controler and 23 dart 215's. my 18 headed motor makes far more power but hasnt been in this current car i will keep you all posted . gonna try 275's next weekend with the 23's :rolleyes:
wish me luck
 

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I have a 383 10.8:1 cr with edelbrock vic jr heads super vic intake solid roller 252/260- 630/630 havent gotten a time on spray but its a freaking pig on motor running a best of [email protected] 118 .... What am I missing?
 
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