632ci

[ovrkll77]

This winter i'm going to build a bigger motor for the boat. I'm currently running a blown 468. So I started talking to some engine shops, The first guy told me that the 632 short block with a 14 71 is the best way to go. Then I call another guy that told me that same short block would be a bad idea. So which guy doesnt know what he's talking about. Any other ideas of what I can use to make about 1100hp, I already have 345 dart pro 1's, intercooler, isky roller cam with a 727 lift. I am going to buy a bigger blower, maybe a 14 71?

[BOOGEYMAN]

A 632 and a 14-71 better make WAY more than 1100.....!! We run a 632 in the dragster and it makes 1350 N/A on gas. Why not go with a 540 and a 10-71 with a super chiller? That should do the trick just fine.
Travis

[ovrkll77]

well, I figured for the same $ I can make more power if I feel like it. or is a 540 a better way of going?

[sleekcrafter]

well, I figured for the same $ I can make more power if I feel like it. or is a 540 a better way of going?
I know a few guys running 572's with 12-71 blowers in their HTM's both are making well over 1000 HP. Both are turn key type boats for the entire season.

[cyclone]

well, I figured for the same $ I can make more power if I feel like it. or is a 540 a better way of going?
Depending on the engine block you use to build the 632, there might not be enough material left in the sleeve/bore to overbore it again if something goes wrong and the cylinder walls become damaged.
you might consider building a combo with a smaller bore diameter...

[DetroitJim]

A 632 is 4.600 bore x 4.75 stroke. Pistons are big $$ and you can only go to 4.625 after that. Balancing is big $$. The stoke is so big that the rods will probably hit the cam unless you run a reduced base circle roller cam, big $$ and custom ground.
All this is overkill for anything short of all out drag race. A 540 or 572 with a 10 or 12-71 is plenty enough to destroy your driveline...:eek: :eek: :eek:
DJ

[Youngblood]

Any other ideas of what I can use to make about 1100hp, I already have 345 dart pro 1's, intercooler, isky roller cam with a 727 lift. I am going to buy a bigger blower, maybe a 14 71?
A 540 with an F2 Procharger unit, just my .002.

[ovrkll77]

I think i'm deciding on a 540 with a 10 71...or just a 10 71 on my 468?

[cyclone]

A 632 is 4.600 bore x 4.75 stroke. Pistons are big $$ and you can only go to 4.625 after that. Balancing is big $$. The stoke is so big that the rods will probably hit the cam unless you run a reduced base circle roller cam, big $$ and custom ground.
All this is overkill for anything short of all out drag race. A 540 or 572 with a 10 or 12-71 is plenty enough to destroy your driveline...:eek: :eek: :eek:
DJ
a +.400 raised cam tunnel block would cure the rod problem but again, a 632cid bottom end would be overkill for a blown motor if you're only trying to make 1100hp.
for comparison, i made 1040hp with a tall deck 572 (4.5 bore x 4.5 stroke) that was topped with a crappy 8-71 weiand street blower spun 21% over and set of Holley 1000HP carbs.

[cjordan]

I had a 632" motor in previos boat that was 10.5:1, fully ported and polished Dart 360 heads, dart tunnel ram, solid roller in the 280/288 @.050 range with .760" lift on 114. made 900hp on pump gas @6600rpm.
Here are some things to consider if you go this big. Start with a 4.56" bore for a ~622" motor, your Pro1 345's are too small, need bigger runner heads (Dart 370 ovals would be awesome) will need solid roller, knock duration down to ~268/274 and shoot for ~.700" net lift on 114 works and go with a "soft lobe" cam (slow ramps) or you'll never keep the lifters in it, trust me I know from breaking them...

[wet77]

The Dart 540 block I am running in my boat I bought and left a 540 for the reason that if something went wrong I could always bore it bigger:devil:
If I remember right you can safely bore the Dart blocks to 632;)
I make 955 hp @ 6200 rpm with a 6-71 @ 9lbs intercooled in a jet boat application, and thats with 325 Dart heads:idea:

[cjordan]

If I remember right you can safely bore the Dart blocks to 632;)
Actually you can take them to 4.625"...which is a 638" motor...;)

[Reapers]

4.5 x 4.5 with dart at 365 and M 5 procharger made 1069 with manifolds on pump gas with no problems. Both engines are completely reliable. Both idle at 900rpm. Tobi

[BOOGEYMAN]

we run an aluminum block in the dragster, just re-sleave it if you need to!!!! :D
Travis

[HIRED GUN]

This winter i'm going to build a bigger motor for the boat. I'm currently running a blown 468. So I started talking to some engine shops, The first guy told me that the 632 short block with a 14 71 is the best way to go. Then I call another guy that told me that same short block would be a bad idea. So which guy doesnt know what he's talking about. Any other ideas of what I can use to make about 1100hp, I already have 345 dart pro 1's, intercooler, isky roller cam with a 727 lift. I am going to buy a bigger blower, maybe a 14 71?
switch that blown motor over to a alky blown motor with a "real tune-up" no dissrespect and that 468 will make over 1000 no prob......with 345's and a 8 or 10-71 with a oddy/schneider blower cam.....1000:jawdrop:

[BOOGEYMAN]

My buddy is sponcered by Jim (oddy) with his pro mod, If you need a cam let me know and I will see what he can do for ya!
Travis

[flattie]

What does your current 468 make for power?

[Unchained]

A small block, Procharger at 14 psi, and EFI will more than do what you want and still start easy and run smooth. You could even do it cheaper with a blow through carb setup.
http://youtube.com/watch?v=WGg37qnebZA
Think outside the old school box.

[adjones419]

I'd go with a 540 or put a 4.5" crank in in to make a 572. Throw a 10-71 on it, and you'll have reliable power all year long.

[HIRED GUN]

My buddy is sponcered by Jim (oddy) with his pro mod, If you need a cam let me know and I will see what he can do for ya!
Travis
hey boogie what promod you speak of?

[BOOGEYMAN]

here is the car

[BOOGEYMAN]

hey boogie what promod you speak of?
It is a pearl orange split window vette, he is going pro mod racing this next season....He just got his 526 KB, 14-71 kabelko(sp) hi hilex retro, fuel pump, and a brand new lenco. Oddy did the heads and the cam for him and he is just putting it togeather now.
Last season he ran it with a 509, 12-71 on alcohol and ran 6.80 @ 205.

[scarabrick2]

If you need engine work, Use Jeff at LJengines@msn.com
He was the main engine builder,(SUB) for GT PERFORMANCE and went on his own . He used to do a lot of machine work for Pfaff.
HE WILL build anything( boat motor, baja motor you name it...) you want at a WAY lower price.
HE Has his OWN full machine shop and still located in so. Calif.
He has a lot of referances and stands behind his work/word.
He did a motor for a very good friend of mine out in Vegas and the engine package hauls a$$.

[ck7684]

How about one of these??
http://www.falconerengines.com/prod02.htm

[HIRED GUN]

If you need engine work, Use Jeff at LJengines@msn.com
He was the main engine builder,(SUB) for GT PERFORMANCE and went on his own . He used to do a lot of machine work for Pfaff.
HE WILL build anything( boat motor, baja motor you name it...) you want at a WAY lower price.
HE Has his OWN full machine shop and still located in so. Calif.
He has a lot of referances and stands behind his work/word.
He did a motor for a very good friend of mine out in Vegas and the engine package hauls a$$.
laff who?

[HIRED GUN]

actually my buddy got a superstock motor from him it runs very consistent...he calls paul ..laff....I hope i didnt discredit him..;)

[scarabrick2]

So Jeff stretch LJengines@msn.com did your buddy's Supper stock motor ? I'm sure it runs strong and Hard.

[rpm2]

Cjordan, would you mind listing or scanning a copy of your cam card/specs? I'm interested in the timing and ramp info.
Thanks

[cjordan]

I'll see if I can find them.....Motor was built in 2000....

[Shadow1]

I'd go with a 540 or put a 4.5" crank in in to make a 572. Throw a 10-71 on it, and you'll have reliable power all year long.
If you up the 540 with a 4.5 inch stoke don't you run into piston pin to ring problems?? I have a 540 which used the 4.25 stoke crank and I still needed oil ring support rails since the pin broke into the oil ring groove.
A .250 increase in stroke would totally pass through the oil ring.
I wanted as thick a cylinder wall as I could get so settled for the 540.
Lots of room for overbores.