BBC Blown Alcohol Heads

[adjones419]

Anyone running Dart 360's or Dart 355 CNC's? Which do you like the best?

[bjuice]

from past experience the blower motor is going to like the bigger flowing head..the CNC from the factory is always better than out of the box head ..but these head guys can find more ponies with their personal blending etc...

this can also turn into much more...what static compression you going with ?..alcohol likes 11-12-1 static compression..

just for the record i DO NOT know where your getting your heads..but when i browse the classifieds here on RJ or anywhere else..if i see the word 'PORTED" other than a factory CNC job..i will Stay away..A UN-QUALIFIED person whittling on a set of heads can acutually hurt them more then help them although they made them bigger...

this is from me to you ..please be very leary of who your buying the heads from that states they have ported their own heads..

YOU PROLLY ALREADY KNOW THIS BUT I FELT LIKE I SHOULD SAY SOMETHING. Cause i see a bunch of heads for sale ebverywhere

bRIAN

[adjones419]

I'm going to be buying a brand new set, and I think I'll go with the Dart 355 CNC's. A good friend is running them on his twin Dominator Nitrous 522 BBC, and they seem to be a great head. Static compression will be 11.7:1.

[bjuice]

I think that is a good choice..speacially buying them new..i would have it no other way ..you going with injection / if so what type ?

Brian

[hotrodharley]

i agree 100% with bjuice.buy new or at least a virgan set that no-one has cut on.i had a friend that bought the mr. gasket head porting kit and spent all winter cutting on his head ports..looked nice BUT he lost almost a full second on his track time..had to junk the heads and buy new ones and got his second back at the track afterwords..

[adjones419]

i agree 100% with bjuice.buy new or at least a virgan set that no-one has cut on.i had a friend that bought the mr. gasket head porting kit and spent all winter cutting on his head ports..looked nice BUT he lost almost a full second on his track time..had to junk the heads and buy new ones and got his second back at the track afterwords..

I bet he was pissed!

[adjones419]

I think that is a good choice..speacially buying them new..i would have it no other way ..you going with injection / if so what type ?

Brian

Yep, Enderle birdcatcher with a 110 pump...port and hat nozzles.

[edvancedengines]

My suggestion is to either Pm or call or email to Curtis Boggs, a contributing member here and a cylinder head genious.

Talk with him about his new Edlebrock Victor 24 degree with the Curtis Boggs developed and designed CNC Porting, done by him at Race Flow Development. I have bought one set and likely will be buying more when needing a great conventional head.

PM to
Cboggs

He can also sell to you the other heads you are looking at for a savings and can also work those if you need them worked.

Ed

[bjuice]

I think that is a good choice..speacially buying them new..i would have it no other way ..you going with injection / if so what type ?

Brian

Yep, Enderle birdcatcher with a 110 pump...port and hat nozzles.


i have already been this route with a Bird catcher and 110 pump....please do yourself a huge favor and call Jim AT ENDERLE to get your initital set up with your mains,by-pass ( hi-speed by -pass) if your running them and nozzles..he will get you dead on it the 1st time around and save you much headache...
if you buy your injection from them they will pre-set your barrell valve "leakdown" and your butterfly clearance according to what yoyur combo is...He saved me much heart ache..

thanks Brian

[adjones419]

I am actually planning on sending the entire fuel system to Spud Miller at Fuel Injection Enterprises to get it flowed and setup.

[Pwmax]

On a blown alchy deal, I would use a Dart 360 race series head. With some minor porting, they will out pace the CNC 355, and cost less. The reason being, is, that the Race series heads, are a bunch beefier, and thicker, in the right places, and, they work.

I wouldn;t loose sleep about worrying about flow numbers either. I recently did a pair of 557 tall deck, marine 8-71 carbed blower engines, super chiller under blower intercoolers, twin King demon RS carbs, dry sumps etc, on pump gas, that made 1040 at only 5 lbs of boost, and 1300 at 15 lbs. This was with Dart Race series 308's, that I ported. We did use 100 octane low lead aviation fuel for the higher boost levels, but, there was still power left in it, could have easily upped the boost more, and, the heads were small, like 320cc, and barely flowed 380. These 2 engines, went in a 42 foot, MTI Cat, that goes over 140mph. This isn;t a race boat either, but a fully optioned "pleasure" boat.

Frank
Advanced performance
www.get-ap.com

[gimmemud]

Frank, now thats what I call a PLEASURE BOAT 140 mph. :D

[adjones419]

Randy Scism sure makes some nice MTI cats in Wentzville, doesn't he? His father-in-law, Clark Gruninger, is a friend and helps sponsor me. Clark has a 36' Daytona Coupe with twin blown 540 Donovans.

Anyway, this blown alcohol piece will be going in an 8 second runnerbottom v-drive dragboat. I'm looking for out of the box performance, don't really want to have to port them. I figure the blower will make up for whatever the heads are lacking. But strength would definitely be an issue.

[Pwmax]

I do a lot of marine stuff, and so far, thats the nicest boat I have seen. Its truly awe inspiring, but, for $650,000, it better be, lol. A lot of guys ask me, how do you get into the boat engines, beiing in Minnesota, there isn't any oceans even close by. Well, we have a very extensive river system, the St.Croix, and obviuosly the Mississippi, and, there is some areas, that sure don;t look like a river. And, being an international waterway, thtere is no speed limit, except in a few "no wake" areas. And then, we have the Great lake Supior here as well, which is like the ocean, and, its fresh water, so it doesn;t eat the inside of your engine, lol.

Gimmemud, yah, 140+ on the water, sure would give you pleasure, lol. If you saw this boat, you would say, how does something that big, go that fast. If the thing had a jack plate, it would go 160+, but, be VERY spooky at speed, and one wrong move, and, it would flip over back wards.


Frank
Advanced Performance
www.get-ap.com

[adjones419]

I've been around high-performance boats all my life. My dad was into dragboats in the 70's and early 80's, but he always ran jetboats. That's where I got my start but finally made the switch to a v-drive. It takes a lot of power to make a jetboat go fast.

The big boats are cool too, but I'm more into the dragboats. I've seen quite a few of the MTI's down at the Shootout at LOTO...we always stay at the same condo with Randy and all the MTI guys. The Bat Boat MTI is absolutely amazing, and so is Speed Racer! Those guys at SuperCat Rigging sure come up with some great ideas. I'm a big fan of the Eliminator Daytonas too. We have a 27' and a 30' we're trying to sell...they're solid 115mph boats.

But anyway, thanks for all of the input on cylinder heads. We're done racing now (except for World Finals in Phoenix in November) until the spring, so the off-season will be devoted to putting the new piece together...making the switch from twin Dominators and Nitrous to blown and injected on alcohol.

[adjones419]

I think I'll go with the Race series 360's instead of the Pro 355 CNC's for strength and longevitiy issues.