What's the best small block heads/motor for boost?

Posted By: 65 Hemi

What's the best small block heads/motor for boost? - 12/31/13 02:46 AM

I have a 64 Dodge that I want to start 275 racing. Currently a 583 B1mc motor but the rules are SB only for boost. What is the best heads and block to use for a boost combo? What parts are most available on the market.

I have never built a SBM. I have always had BBM. I am looking to see if it makes sense to switch.

Posted By: MR_P_BODY

Re: What's the best small block heads/motor for boost? - 12/31/13 03:01 AM

I would say R3 block 48* siamese cyl with a W-8 head..
the W-9 would be the next head only because the W-8
is so much beefier... the W-9 has a great flowing exhaust
port for a turbo... both heads and the R3 block have
the extra head bolts for better clamping force
EDIT
I'm selling my car and engine now but if it goes as
a roller I'll be selling the engine on its own..
its a R3 block 48* siamese with a billet crank 3.79",
fully ported W-9 heads and TD rockers, all good stuff..
PM me if interested (its in the for sale section)

Posted By: fishy340

Re: What's the best small block heads/motor for boost? - 12/31/13 03:09 AM

If its a turbo your not gonna need that much ci i would go with w7 15* heads,the deck is super thick 3/4 " so its not gonna lift & there an 18 bolt head.Short deck r3 or same thing mopar restoration block.I think with the w7 you'll get 375cfm and good exh #'s also.
I know someone with 3 sets of w7 heads and brand new blocks,i saw 2 blocks in the garage recently.

Posted By: dizuster

Re: What's the best small block heads/motor for boost? - 12/31/13 03:18 AM

I'd say Gen 3 hemi is actually the best flowing head for small Cid right now. Ported 6.4l head will go over 400cfm for sure.

How much power? Stock 5.7 block is good for at least 1200hp.

Posted By: MattW

Re: What's the best small block heads/motor for boost? - 12/31/13 03:36 AM

Quote:

I'd say Gen 3 hemi is actually the best flowing head for small Cid right now. Ported 6.4l head will go over 400cfm for sure.

How much power? Stock 5.7 block is good for at least 1200hp.

I agree but your going to lift the heads with too much boost. Now I don't know if this is due to the material the head is made of, amount of bolt retaining the head, quality of fasteners or all the above. But THITEK has a G3 head that is physically beefier.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 03:37 AM

Quote:

I'd say Gen 3 hemi is actually the best flowing head for small Cid right now. Ported 6.4l head will go over 400cfm for sure.

How much power? Stock 5.7 block is good for at least 1200hp.

I will need to make about 1700-1800 HP. How about the P7 NASCAR stuff???

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 03:40 AM

Quote:

If its a turbo your not gonna need that much ci i would go with w7 15* heads,the deck is super thick 3/4 " so its not gonna lift & there an 18 bolt head.Short deck r3 or same thing mopar restoration block.I think with the w7 you'll get 375cfm and good exh #'s also.
I know someone with 3 sets of w7 heads and brand new blocks,i saw 2 blocks in the garage recently.

I'm thinking Procharger or 1071Roots. I will need to run 4.50s in the 1/8 at 3200lbs around here.

Posted By: MR_P_BODY

Re: What's the best small block heads/motor for boost? - 12/31/13 03:46 AM

My next question would be, do they let you run any rear
suspension or are you stuck with leafs

Posted By: fishy340

Re: What's the best small block heads/motor for boost? - 12/31/13 04:00 AM

4.50's 3200lbs= 1900hp and an outstanding suspension.I know this to be true my good friend did that last yr in x275.BB nos car

I think a 400ci Pro charged BES piece would get you 1500 or so.I'd be lying if i knew who could build a sb mopar that stout.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 04:06 AM

Quote:

My next question would be, do they let you run any rear
suspension or are you stuck with leafs

Can run ladder bars but some ladder bars have an adjustable top bar like a 4 link but it connects to the lower bar in front.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 04:11 AM

Quote:

4.50's 3200lbs= 1900hp and an outstanding suspension.I know this to be true my good friend did that last yr in x275.BB nos car

I think a 400ci Pro charged BES piece would get you 1500 or so.I'd be lying if i knew who could build a sb mopar that stout.

I know a local guy makes 1800 HP with a SBC and runs 4.50- 4.60s. I think I may be out gunned with a mopar. I think there is a guy in TX with a new Challenger with turbo w8 that may be in the hunt but I think it would be cool to do it with old metal mopar (64 B-body).

Posted By: FASTFISH420

Re: What's the best small block heads/motor for boost? - 12/31/13 04:37 AM

I was going to convert mine to F2 pro charged on alcohol Uratchko and Steve Morris said it would make 1750 horsepower.. that is at 416 cubes with 10 degree pro stock head

Posted By: fishy340

Re: What's the best small block heads/motor for boost? - 12/31/13 04:39 AM

I agree it would be cool to see a mopar doin it.My friend Petey sb has the record for sb Mph in x275..car is 2750lb and makes right around 975hp MOTOR with sb2 heads.

Best of luck bud,i personaly would love to see this done with a mopar.The car in TX is Marty and he'll be the first to tell ya its a HUGE amnt of coin to do what he's done with a p5 sb hemi head.

Good luck man!

Posted By: fishy340

Re: What's the best small block heads/motor for boost? - 12/31/13 04:42 AM

I don't think John Sears allows a 10* head in x275. I could be wrong and if it is allowed it would have to weigh a ton in penalties.

Posted By: SLOW67

Re: What's the best small block heads/motor for boost? - 12/31/13 04:49 AM

Around here the most competitive X275 cars are BB on N20. That's just what I've seen here.

Posted By: dizuster

Re: What's the best small block heads/motor for boost? - 12/31/13 05:11 AM

All the sb ford stuff is only 4 bolts per cylinder and they can run big boost in those. Not sure why a hemi couldn't do the same thing?

I'm not sure if the open deck r5 block will take a ton of boost. Maybe with darton sleeves it would work?

Or if you could get an xr block you could use a p7 head?

The duster from Texas (marty) doesn't have w8 heads. Now it's got billet p5 heads.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 05:22 AM

Quote:

I don't think John Sears allows a 10* head in x275. I could be wrong and if it is allowed it would have to weigh a ton in penalties.

I don't see any thing about SB heads being limited on the X275 rules.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 05:25 AM

Quote:

Around here the most competitive X275 cars are BB on N20. That's just what I've seen here.

I have a legal 583 B1MC motor that make 1149HP plus NOS but I don't think it will hang with brand X.

Posted By: W5DART66

Re: What's the best small block heads/motor for boost? - 12/31/13 05:44 AM

PM me I have the w8s that you will need to do this.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 06:05 AM

What do you think this motor will do set up for boost. New piston and cam with a Procharger or turbo?
http://www.racingjunk.com/Drag-Racing/182074121/440-all-aluminum-w8-small-block-mopar.html

Posted By: 1967dartgt

Re: What's the best small block heads/motor for boost? - 12/31/13 06:37 AM

Quote:

What do you think this motor will do set up for boost. New piston and cam with a Procharger or turbo?
http://www.racingjunk.com/Drag-Racing/182074121/440-all-aluminum-w8-small-block-mopar.html

Don't think you can get a piston with a enough compression height for boost with a 9.00 inch deck and a 4 in crank.

Posted By: 1967dartgt

Re: What's the best small block heads/motor for boost? - 12/31/13 06:41 AM

I would do a tall deck r3 with w8s 4.200 bore and 4 in crank and a turbo. I would use Brett's largest cnc program for the w8s.

Posted By: 1967dartgt

Re: What's the best small block heads/motor for boost? - 12/31/13 03:59 PM

Why not take your current motor to bes get a couple more na hp and then put a single fogger on it and learn how to spray 600 hp on it. That is what the major players around here run on there big blocks. I think it would be at lots more cost effective.

Posted By: WO23Coronet

Re: What's the best small block heads/motor for boost? - 12/31/13 04:30 PM

What kind of setup are the SBC guys using to get 1800 HP?

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 05:51 PM

Quote:

I would do a tall deck r3 with w8s 4.200 bore and 4 in crank and a turbo. I would use Brett's largest cnc program for the w8s.

Are the R3 readily available?

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 05:53 PM

Quote:

What kind of setup are the SBC guys using to get 1800 HP?

440"-450" turbo or Procharger and one guy is using a 1071 roots.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 05:59 PM

Quote:

Why not take your current motor to bes get a couple more na hp and then put a single fogger on it and learn how to spray 600 hp on it. That is what the major players around here run on there big blocks. I think it would be at lots more cost effective.

The Spray is limited to a 42 jet and a -6 line. I'm not sure I can get there with this and I was thinking of trying to get away from NOS.

Posted By: dizuster

Re: What's the best small block heads/motor for boost? - 12/31/13 06:01 PM

What the turbo limited to? If it's a Mid Frame, you don't want to build a 450" motor because the exhaust will be choked...

Yes R3's are readily available.

Posted By: MR_P_BODY

Re: What's the best small block heads/motor for boost? - 12/31/13 06:39 PM

Quote:

Quote:

I would do a tall deck r3 with w8s 4.200 bore and 4 in crank and a turbo. I would use Brett's largest cnc program for the w8s.

Are the R3 readily available?

Buy my engine and the bulk of the work is already done

If you want it turn key...
I will refresh engine... R3 W-9 405ci 48* siamese with
dry sump system
3.79 BILLET crank chevy rods
6.125 Eagle H-beam chevy rods
CP pistons light weight 4.125 bore with .043 rings
heads are W-9 fully ported with 2.18I/1.625E
flows 356 cfm at .700
cam is custom roller 276/282 @ 50 .698/.705
PAC valve springs for the cam
KB gear drive
3/8 moly ball and ball push rods(5/16 balls)
T&D rockers mini shaft 1.6 ratio
custom cast MP reverse lip valve covers
custom billet intake valley cover
custom head cooling manifolds
420 intake fully ported with 1050 dom
custom 3 step plated headers made for this engine
dry sump oil pan with 2 pick ups in the pan
1 pick up in the intake valley
4 stage dry sump pump.. draws 12"HG vac
Will sell with either a 1050 E-85 carb OR 1050 gas carb
MSD dist for a dry sump

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 06:40 PM

Quote:

What the turbo limited to? If it's a Mid Frame, you don't want to build a 450" motor because the exhaust will be choked...

Yes R3's are readily available.

MF 88mm is the max.

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 06:44 PM

Quote:

Quote:

What the turbo limited to? If it's a Mid Frame, you don't want to build a 450" motor because the exhaust will be choked...

Yes R3's are readily available.

MF 88mm is the max.

Can you PM me a price and is it a tall deck?

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 06:46 PM

Are Gen III hemi blocks available aftermarket to handle 1800HP?

Posted By: B1CUDA

Re: What's the best small block heads/motor for boost? - 12/31/13 08:22 PM

I am doing a big inch small block, with an F2 and EFI. If it doesn't make 1700HP, something will be wrong.

Attached picture 7978372-F2.jpg

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 12/31/13 09:05 PM

Hi Chris,
Can you give details. You probably don't remember me but I use to go out to Compton when you hung out with Hollaway. I have Eddies 64 Polara that Nate built many years ago.

Posted By: B1CUDA

Re: What's the best small block heads/motor for boost? - 12/31/13 09:59 PM

Sending you a PM....

Posted By: MattW

Re: What's the best small block heads/motor for boost? - 12/31/13 10:09 PM

Quote:

Are Gen III hemi blocks available aftermarket to handle 1800HP?

Some Nascar guy hand one built. Aluminum Block with a procharger. 1600 hp I think

Posted By: 65 Hemi

Re: What's the best small block heads/motor for boost? - 01/01/14 01:20 AM

It sounds like the consensous is R3 9.20 deck with W8s. Any other input would help!