Building BO29 Cuda look a like. Gerst front and rear suspension, 12 point cage, gear vendor OD w/ 727 and Dana 60. Street legal, 93 UNLEADED!! I would like to run a cross ram with AFBs or Fuel injection, what heads? B1?, Indy? Bulldog block (4.5 bore x 4.5 stroke), would like Hydraulic roller cam. Want this to be a formidable 1/8 mile race car that can be street driven. Will be mini tubbed, with big rubber in back. 572 big block not common street motor. Thanks.
572 RB Street motor advice?
- Thread starter beepbeep46
- Start date
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I'd use the Trick Flow 270 heads. You could also use an Indy head but the Trick Flow heads will make plenty of power and they are nicely finished right out of the box. You can order the Trick Flow heads with a hyd roller cam valve spring and get them shipped ready to bolt on direct from Summit. You can't do that with the Indy stuff.
I'd also use a dual Sniper setup rather than carbs. Holley sells a dual Sniper kit now but it won't be a bolt on for the cross ram. You'll have to build the fuel lines and add some wire for the connectors and modify the throttle linkage. But it will be worth it in the end since it will run a lot better than carbs and it will provide a lot of tuning capability. If you aren't very good with computers you might want to find someone to help you tune the fuel injection.
I'd also use a Holley HyperSpark distributor so you can control the ignition curve with the Sniper. That would be a pretty good setup. You should be able to make about 800 hp and have it idle like a baby.
I'd also use a dual Sniper setup rather than carbs. Holley sells a dual Sniper kit now but it won't be a bolt on for the cross ram. You'll have to build the fuel lines and add some wire for the connectors and modify the throttle linkage. But it will be worth it in the end since it will run a lot better than carbs and it will provide a lot of tuning capability. If you aren't very good with computers you might want to find someone to help you tune the fuel injection.
I'd also use a Holley HyperSpark distributor so you can control the ignition curve with the Sniper. That would be a pretty good setup. You should be able to make about 800 hp and have it idle like a baby.
famous bob
mopar misfit
Haven`t heard the name "bulldog' in a long time , and never much about it . TELL US ABOUT IT ----------
Agre w/ Andy on the heads. I know a guy that has duel f/inj. set up on a small block mopar, fast !
That is what I was hoping to hear! I didn't want to go B1 or Indy for several reasons. Looking online for 572 builds, most are Hemi and rest are full race. Will Sniper system adjust itself if exhaust cutouts are used? I plan to have them for track use. I know I will need O2 sensors upstream of cutouts. This build will be over the winter and into Spring. I'm currently building 500 RB with FiTech 6bbl. for my Roadrunner and hope to have it running this Fall. That should help educate me on fuel injection. It will have TF 240 heads, Comp Cam XR280R. Thank you AndyF for the advice!!
Bulldog Performance from Indianapolis. They are producing B, RB, and Gen II Hemi blocks. Iron and Aluminum. Very beefy, cross bolted mains. Very much like the Koleno block. $3975 4.49 bore +$150 Phone 317-869-8689 Richard Bradshaw bulldogblockhead.com
Dragula
Active Member
Depending on your weight and ET goal, and if starting fresh, I would go B1 heads. Or if your looking for the cheaper option, Indy Big EZ325 heads.....The B1's will out run just about anything out there. I run EZ1 heads in my 2650lb car, and it runs 6.12 in the 1/8th...with a 400/512
The OP wants to run a cross ram so the B1 heads aren't an option. The EZ heads would work, but Trick Flow 270 heads are better quality and lower cost than the Indy heads.
All that *** and hydraulic? Damn.
All good advice. Nothing like going backwards with the cam though. Kim
famous bob
mopar misfit
I like the idea of a hyd. cam if it will work for his applicaton. Blueprint eng. has an 815 horse rat w/ a hyd. cam , guaranteed for 30,000 ! If muwaa had the coin , I`d have one !
Hemirunner
Well-Known Member
They work well with good lifters like a Morel, however, the one mentioned is quite small for a 572 cube engine. The 270 head would be a much better choice for this combo as well.
famous bob
mopar misfit
I can go along w/ the 270 head .
That being said , a guy could probly find a hyd. cam kit that would work w/ them, I`d think >--------?? Probly aint gonna put out any more power than the 815 horse rat .
TF270 would be best.....here's a 589 street wedge (originally built as a 605 with 4.625 crank, now with 4.500") my mate has just bought for his street/strip Runner for reference only>
10:1Cr, 572-13's/small solid roller .620" don't know duration on 112lsa, dyno'd@714hp/750ftlbs with an 850DP and slightly less with his own 950DP?, should put his 3800lb bench seat car in the low 10's next year and he can drive it around as goes to a lot of shows. Lot of potential in the motor with upgrades.
10:1Cr, 572-13's/small solid roller .620" don't know duration on 112lsa, dyno'd@714hp/750ftlbs with an 850DP and slightly less with his own 950DP?, should put his 3800lb bench seat car in the low 10's next year and he can drive it around as goes to a lot of shows. Lot of potential in the motor with upgrades.
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Get it and dress it up like a stock 396......
Hemirunner
Well-Known Member
I had a hydraulic roller ground for use in a 48 degree R3 block so a BBM is an easy one. No, probably not gonna be 800hp in street form.
PRH
Well-Known Member
TF270’s are kinda small on a 572.
Just depends on exactly what you’re trying to do.
TF270’s and a factory style x-ram are going to want to peak really early.
Just depends on exactly what you’re trying to do.
TF270’s and a factory style x-ram are going to want to peak really early.
Hemirunner
Well-Known Member
PRH
Well-Known Member
I guess it comes down to just how formidable it has to be.
OP wants pump gas, a cross ram and a hyd roller cam. Which says to me that he wants something that is low maintenance but shoves him back in the seat when he goes to the track. With 572 cubes he might be able to make 700/700 with a cross ram but it might be too choked to even make that. Even with it choked down it should be good for 10's in a street car or perhaps 9's if he has the good tires and converter. OP didn't give us much to go on so we're all making assumptions. If he wants to make 800+ hp then he would probably need to go with a Indy cross ram or a tunnel ram. I don't think the Mod Man will support 800+ hp. Another option would be to ditch the dual carb idea and go with a big single plane intake and a Dominator. The factory cross ram looks cool but it is doesn't make a ton of power.
Another thing that people have to keep in mind is although the bottom end architecture has changed, the top end has not. Even well thought-out modern valvetrains are limited to around .650 lift for true street use/durability. An old, heavy valvetrain design is going to require a lot of spring pressure to keep it under control, and that takes it's toll. Although a wild .800 solid roller would play well with 572 cubes, it wouldn't be long for this world.
700-800HP is range I am shooting for. Car will be caged and tied together with overdrive and mufflers for short street trips to shows (20-30mile). Want a high 9 - low 10 second car that isn't a high maintenance 14:1, radical roller cammed trailer queen. I'm open to adding 105 octane to the tank, but not filling up with Q16. I know I could put Predator heads and big mechanical roller cam in it and turn higher RPM, but that isn't what I want.
Rear end will be a Dana 60, trans and converter will be matched to engine and chassis. I am open to single Dominator or Sniper injection, but need to keep street use in mind.
Certainly sounds like you're on the right track. Big cubes to keep the revs down, or forced induction would be the way to go.
You don't have to worry about octane on a big inch motor more than any another motor. It's always been said that big cube engines are detonation prone. This isn't really true. They do however require less timing. The explosion takes the same amount of time as in a small engine, but has a much longer stroke for it to occur in.
I could increase stroke, but that would put more demand on head performance? Trick Flow made 687HP with 10.15:1 and 505 cubic inch with 270 heads. I somehow think that combination stretched some would reach 700HP+. Plus a little, not 100HP+.
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