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Bought a low deck aftermarket block how big can you go #2621967
02/16/19 01:18 AM
02/16/19 01:18 AM
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Laredo, Texas USA
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hugo Offline OP
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Bought “The Block” in low deck and wanted to know how big have you guys gone with it? 540, 557, 572? Any combos out there?

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622008
02/16/19 03:39 AM
02/16/19 03:39 AM
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I have an Indymaxx low deck thats currently ay 455 cubes. I rev to 8k with Ross pistons & Molnar crank n rods. Larry Smith ported heads, on pumpgas im running 9.0 @150mph. Ive beaten this block for 15 years, im thinking of building another @ 540 cubes, the extra 95 cubes has to run me into the low 8's. I'd be keen to hear of some bigger inch reliable builds on this size block too.

20180705_222116.jpg
Re: Bought a low deck aftermarket block how big can you go [Re: rebel] #2622010
02/16/19 03:47 AM
02/16/19 03:47 AM
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Laredo, Texas USA
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What are your heads 440-1? What do they flow? What is the weight on your car ready to race? Gear ratio and size of tires? Cam? Overall combo?

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622017
02/16/19 04:28 AM
02/16/19 04:28 AM
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440-1 386cfm
1248kgs with my fat ass in the pilots chair,
4.8 gears,33" slick
6700 stall 727.

20181013_201131.jpg
Last edited by rebel; 02/16/19 04:47 AM.
Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622026
02/16/19 05:43 AM
02/16/19 05:43 AM
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Bend,OR USA
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The low deck blocks limits how much stroke you can safely use while still having some of the piston still in the bottom of the bore at bottom dead center.
I've built two 400 block stroker motors with 4.300 stroke, one I ran the heck out of on the street on pump gas, the other one is one of my new race motors that hasn't been ran yet confused
It did have wear marks on the bottom of all the piston skirts on the first motor but there wasn't any measurable wear on the skirts below where the wear marks where the skirts where hanging out the bottom of the cylinders confused That motor had hundreds of runs on it and 3000+ street miles on it when I sold it, I had freshen twice and it ran really good up I used a set of 7.800 long BB Chevy type rods with a set of Ross custom dish pistons in the first motor, one of the member on here who use to run a automotive machine shop in Florida saw a picture of one of those pistons and called them Hockey pucks shock work My new race 400 block 4.300 stroke motor has a set of Molnar 6.700 long BB Chevy type rods in it with a set of custom made Diamond pistons for racing on E85
If I was you I would not go beyond a 4.375 stroke in a low deck block twocents
IHTHS thumbs


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622033
02/16/19 08:51 AM
02/16/19 08:51 AM
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I have a production 400 block with a 4.500 crank,6.53 rods and flat tops,4.375 bore,comes out to 540

Last edited by 69b1dart; 02/16/19 08:53 AM.
Re: Bought a low deck aftermarket block how big can you go [Re: rebel] #2622090
02/16/19 12:50 PM
02/16/19 12:50 PM
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Originally Posted By rebel
440-1 386cfm
1248kgs with my fat ass in the pilots chair,
4.8 gears,33" slick
6700 stall 727.






MAN you must be a BIG boy.


1248 KILOGRAMS

=

2751.3227513228 POUNDS


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622115
02/16/19 01:45 PM
02/16/19 01:45 PM
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I built a low deck (9.980) KB aluminum block at 540 CID.
4.500" bore
4.250" stroke
6.535" long rods
1.32 " piston compression height

I am sure a 4.50" stroke could be put in that block.


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: Bought a low deck aftermarket block how big can you go [Re: Cab_Burge] #2622261
02/16/19 07:16 PM
02/16/19 07:16 PM
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Laredo, Texas USA
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Good info. I wanted to see if someone with a similar combo would chime in. I would only be building a naturally aspirated engine for bracket racing. I do want to build as much hp and torque as I can and for it to be reliable. I’ve seen people in the board say they have a 557 low deck I just want know how reliable are they? Or is it better just to build a 540.

Re: Bought a low deck aftermarket block how big can you go [Re: pittsburghracer] #2622269
02/16/19 07:34 PM
02/16/19 07:34 PM
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aotearoa
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Originally Posted By pittsburghracer
Originally Posted By rebel
440-1 386cfm
1248kgs with my fat ass in the pilots chair,
4.8 gears,33" slick
6700 stall 727.






MAN you must be a BIG boy.


1248 KILOGRAMS

=

2751.3227513228 POUNDS

opps fat fingers, 1148 kgs thats 2531lbs. I'm 92 kgs so thats 203lb so that puts the car 2328lb curb weight. Not too bad for an E body with an interior.

49947645_110224300062239_904699384472535040_o.jpg
Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622297
02/16/19 08:47 PM
02/16/19 08:47 PM
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Who did you get "The Block" from? How was the whole process?

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622312
02/16/19 09:51 PM
02/16/19 09:51 PM
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2531 lbs, I can only dream of being 815 lbs lighter at race weight.
Doug

Re: Bought a low deck aftermarket block how big can you go [Re: parksr5] #2622319
02/16/19 10:00 PM
02/16/19 10:00 PM
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Laredo, Texas USA
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I got it directly from bulldog performance. I dealt with Richard BRADSHAW. I had heard different stories from the guy some good others bad but from my experience I order the block and he delivered. Zero problems! 😃

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622554
02/17/19 03:30 PM
02/17/19 03:30 PM
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How big. Our family dragster had a 572" Low Deck in it, 4.50" stroke and 4.50" bore. GRP rods, raised cam block crower crank Cp pistons. Made 1025hp and we never got to run it wide open with all the timing and the big carb as it was faster than my son is licensed to go. The car was capable of 7.20's in Vegas in the heat of the summer. So we ran it with a small carb and pulled a TON of timing from it.


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Re: Bought a low deck aftermarket block how big can you go [Re: Al_Alguire] #2622796
02/18/19 01:37 AM
02/18/19 01:37 AM
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My block does not have a raised cam Al? Would that be a problem? What size were your rods? What were the specs on that 572? Would my block without the raised cam be a good choice for a 572 or is it just better to build a 557 or 540?

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622956
02/18/19 04:16 PM
02/18/19 04:16 PM
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How fast do you want to go and how much work and money do you want to spend on the car?
How much does it weigh and how good is the chassis?
Many things to keep in mind when planning new race motors and cars work
I have one high nickel Koleno 4.500 bore iron block in stock and it will get a Bryant 4.375 stroke old top fuel crank in it with BB Chevy rod journals and B1-MC heads ran N/A on E85 to try and run top Sportsman in NHRA luck I have a new KB RB aluminum block on order so I can use a old KB 4.500 stroke crankshaft that I have that could not be offset stroked so I will use it to build a motor around that crankshaft.
Stupid me, I know better than to do this type of build down runaway whiney shruggy
I recently bought a used set of original B1 heads for this build so maybe it will turn it, the KB motor, into a pump gas motor devil realcrazy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2622971
02/18/19 04:52 PM
02/18/19 04:52 PM
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I don't see a raised cam being a doable thing, especially with an aluminum rod. But never tried it honestly...

FWIW the low deck in my Cuda was only a 4" stroke 525" deal and it ran pretty well. I don't think 4.5" is something most should do, but it can be done. I honestly would likely do a 540" deal with a STD cam block. It is a good combo and will require nothing "unusual" for the combo and should run well


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Bought a low deck aftermarket block how big can you go [Re: Al_Alguire] #2623370
02/19/19 04:04 PM
02/19/19 04:04 PM
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I want to make as much power as I can with my indy 440-1 hand ported heads. They flow 356 at 700 and around 370 at 800. I know I wont make what you guys with B-1 Mc are making. But I want to build a good foundation and make a strong reliable bracket engine. My goal is to make 900hp with my heads. I can always upgrade my heads later. I don't have the budget for new heads right now. I already had a 499 ci and will be reusing my heads and pushrods, lifter. My car is a 69 road runner that weighs 2947 with the 499 ready to race with me in it. Chassis is ladder bar in the back and struts in the front. The suspension can take the 900 hp goal.

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2627901
03/02/19 02:02 PM
03/02/19 02:02 PM
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Anyone that wants to share their 572 low deck combo or 557?

Re: Bought a low deck aftermarket block how big can you go [Re: hugo] #2627941
03/02/19 03:47 PM
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Originally Posted By hugo
I want to make as much power as I can with my indy 440-1 hand ported heads. They flow 356 at 700 and around 370 at 800. I know I wont make what you guys with B-1 Mc are making. But I want to build a good foundation and make a strong reliable bracket engine. My goal is to make 900hp with my heads. I can always upgrade my heads later. I don't have the budget for new heads right now. I already had a 499 ci and will be reusing my heads and pushrods, lifter. My car is a 69 road runner that weighs 2947 with the 499 ready to race with me in it. Chassis is ladder bar in the back and struts in the front. The suspension can take the 900 hp goal.


My 514 race engine made 900 hp with ported EZ heads and a single 4bbl. That engine spent a lot of time on the dyno to get there, but once we figured it out the recipe wasn't hard to follow. You should be able to do it with -1 heads if they have good ports. You'll need a ported intake, a big Dominator, lots of compression and a big cam. I think you'll need Jesel rocker arms to hit 900 hp and if it was me I'd use a Jesel belt drive and a belt drive distributor since those things just make it easier to work on the engine.

If it was me I'd go with 4.500 bore size and a 4.250 crank. That gives you 540 inches and it should go together really easy. Lots of vendors for the parts and good rings are available at that bore size. Shoot for 15:1 compression if you want to make 900 hp and run X16 gas.

Send the heads to Porter Racing so they can go thru them and advise you on the port work. They can also set you up with the right cam and valve train for 900 hp. Only intake that will work on a low deck is the Indy 400-3. It isn't a great intake out of the box so ship it to Wilson or to Fast Lane. Figure on $1000 for the port work but you'll need it to hit 900 hp.

Good luck and make sure you have about $20K in your check book before you start.

Last edited by AndyF; 03/02/19 03:54 PM.
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