427 Stroker
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Ok thanks,
I want to use the car only on the street. I want to make 500 HP or more. Autotrans built for 600 HP with overdrive (haven't picked the stall converter yet), 377 rear gears. I want to run pump gas. the callies tech guy told me that with 74 cc chamber it would be 10.8:1. I think the pistons are a -5cc. I want something pretty mean but still able to run on the freeway for a Sunday drive.
I want to use the car only on the street. I want to make 500 HP or more. Autotrans built for 600 HP with overdrive (haven't picked the stall converter yet), 377 rear gears. I want to run pump gas. the callies tech guy told me that with 74 cc chamber it would be 10.8:1. I think the pistons are a -5cc. I want something pretty mean but still able to run on the freeway for a Sunday drive.
Chris
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
You also could go with the 3.875 stroke crank and drop your CI to 414 and compression down to 10 to 1. A lot less clearancing and easily reach 500+ HP without going real radical on the cam or build specs.
Racer
Joined: Jul 2008
Posts: 338
Likes: 4
From: Bowling Green Kentucky
PM me if you would like more info.
Racer
Joined: Jul 2008
Posts: 338
Likes: 4
From: Bowling Green Kentucky
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Chamber size is limited to 72CC, 68 CC, 64CC.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
I posted a pump gas build awhile back with OEM stroke of 3.75" and some of the ProMaxx heads on a dual plane intake with a 950HP all on top of a 10 to 1 383. Made 530HP and 510#/ft of torque and had almost 11" of vacuum.
Thread Starter
Instructor
Joined: Feb 2014
Posts: 228
Likes: 2
Thanks All!
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Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Unless it is a pan rail kickout style pan you will have windage issues and the longevity of these engines is seriously decreased. I 2 customers right now that went from 406 SBC to 434 in there street strip rides. One has lost rods in the engine 2x and the other once. Both engines are slower than the 406's. Both used the same headers and pans from the builds. I've told both of them they need better pans and better headers. Neither want to spend the $2000 for these items. Both want me to do new cams for them.....I won't as cams won't help them until they change the other stuff.
Thread Starter
Instructor
Joined: Feb 2014
Posts: 228
Likes: 2
Unless it is a pan rail kickout style pan you will have windage issues and the longevity of these engines is seriously decreased. I 2 customers right now that went from 406 SBC to 434 in there street strip rides. One has lost rods in the engine 2x and the other once. Both engines are slower than the 406's. Both used the same headers and pans from the builds. I've told both of them they need better pans and better headers. Neither want to spend the $2000 for these items. Both want me to do new cams for them.....I won't as cams won't help them until they change the other stuff.
thanks for the help.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Like I have said before I could have made more power with my 427ci smally but I have ballpark figures for street/strip engines, I am over 600HP and run 91 octane or mid grade gas.
350ci-400hp
383ci-500 + a bit
406ci-550hp
427ci-650hp
You can make more HP out of any of these engines but they would be a pain in **** to drive around town.
Safety Car
Joined: Oct 2004
Posts: 3,924
Likes: 735
From: Youngstown Ohio
Another vote for AFR 210 Eliminators (competition ported), for the same reasons stated earlier by 63mako. These are what I have in my 427sb. I'm running a solid roller cam, but a hyd. roller will work well if you prefer. I'm using a World Motown single plane intake, and there is plenty of bottom end TQ.......pulls from idle through 7000 rpm.
Street manners are the same as my previous 383, but with even slightly better idle vacuum and 628 HP @ crank. (If you only want 500 hp, refrain from pushing the pedal all the way down!)
Good luck with your build.
Street manners are the same as my previous 383, but with even slightly better idle vacuum and 628 HP @ crank. (If you only want 500 hp, refrain from pushing the pedal all the way down!)
Good luck with your build.
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
The base head is already CNC ported. They flow 9 CFM more on the intake side @ .600 not 20+. Polishing and blending at the right points will get you there. Im sure they are opening up the exhaust side a little but they are only gaining 15 CFM there, not 20+. Darts always run bigger than advertised. Dart 180 is 190+ out of the box. Gasket size is the same on both AFR heads and they are meant to match the Titan intake. Put a set of 227's on it with a $2000 shaft rocker setup and a Victor Jr and a big solid roller if you want. Im just suggesting what I would do on a street, Sunday driver car. As I said I'm outvoted. I'm out!
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
The general never designed the crank case of of the SBC to accept anything over 3.75" Stroke. If the sides of the pan come straight down from the pan rail on passenger side, high pressure side, then there is not a question of if you will have windage issues it will be a question of when the bearings come out of the engine.
Racer
Joined: Jul 2008
Posts: 338
Likes: 4
From: Bowling Green Kentucky
This is where I have my own personal limits on engines that are mainly street engines and you can take to the track and run good numbers.
Like I have said before I could have made more power with my 427ci smally but I have ballpark figures for street/strip engines, I am over 600HP and run 91 octane or mid grade gas.
350ci-400hp
383ci-500 + a bit
406ci-550hp
427ci-650hp
You can make more HP out of any of these engines but they would be more FUN to drive around town.
Like I have said before I could have made more power with my 427ci smally but I have ballpark figures for street/strip engines, I am over 600HP and run 91 octane or mid grade gas.
350ci-400hp
383ci-500 + a bit
406ci-550hp
427ci-650hp
You can make more HP out of any of these engines but they would be more FUN to drive around town.
Thread Starter
Instructor
Joined: Feb 2014
Posts: 228
Likes: 2
Another vote for AFR 210 Eliminators (competition ported), for the same reasons stated earlier by 63mako. These are what I have in my 427sb. I'm running a solid roller cam, but a hyd. roller will work well if you prefer. I'm using a World Motown single plane intake, and there is plenty of bottom end TQ.......pulls from idle through 7000 rpm.
Street manners are the same as my previous 383, but with even slightly better idle vacuum and 628 HP @ crank. (If you only want 500 hp, refrain from pushing the pedal all the way down!)
Good luck with your build.
Street manners are the same as my previous 383, but with even slightly better idle vacuum and 628 HP @ crank. (If you only want 500 hp, refrain from pushing the pedal all the way down!)
Good luck with your build.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
This is based on a 4" stroke engine with a set of 210s?