Transman wrote:Used to!
Just saw a post on another site by Chad Speier that Darin resigned on Monday from R-M to move out to Denver and work with Dave Capriotti on Cup heads.....
Watch out NASCAR guys, here he comes!
Jason G wrote:For a 1000 HP SBC on a bunch of N2O I wouldn't be using an SB2.2 and a single carb. If you do use an SB2.2 head, the Weld Tech heads you are looking at are not the tool for the job.
You might talk to some folks that have been there and done that.
Chris Uratchko Racing Engines
Ed-vancedEngines wrote:As you get a little further into this, I can probably be of a little help to you with some areas of this project.
We are currently in the process of developing a nitrous specific piston for a SB Bore engine without adding a ton of extra weight to it. First versions of this should be completed in the next couple or three weeks.
Transman wrote:I agree. I've worked with a few guys running those engines in drag cars and generally if you have the right cylinder head/camshaft combo horsepower is a non-issue. Even the 18-degree SBC stuff will make near 800 without much effort. I believe a cast intake will get you near 875 or so with the 2.2 heads. Don't forget they were designed to be a single 4-bbl head to begin with! Next up would be a sheet metal intake ala Hogan's, CFE, TRE, Hughes, etc. If you plan on running an automatic torque converter selection is critical with an engine like that. With a 2.2 I always recommend waiting until you have solid dyno information before getting a converter built, even more so than any other SBC combo.
dano73327 wrote:They are limited to displacement and bore sizes, that only leaves a VERY small range of stroke length. If they were suddenly allowed to build 400cid engines don't think they wouldn't jump on that longer stroke.
Giving up displacement when you don't have to is not smart. The more stroke he puts in that thing the easier it will be to reach his power goals.
dano73327 wrote:I personally don't think those heads will get it done. Thats a pretty small port and it doesn't flow very much. The GP heads are good stuff I just don't think that particular version is even close. Definitely not designed for the application you have in mind. I would think you would need closer to a 300cc or bigger SB2 port with a 2.18 valve that flowed more like 420+ cfm.
I don't know about anyone else but that's the way I'd be leaning on the heads. I also agree that you are going to need a sheet metal manifold and dual carbs to get to that 1000 hp NA goal. I did heads for a SBF 468 that was a very nice dry sump engine, the heads were Victor Glidden's over 420cfm, and it had a sheet metal intake with a single dominator, it made 980hp. This was built at Kuntz and Company, and with another dominator it would have cracked the 1000 mark I believe.
Build it big!
airflowdevelop wrote:1. Start with a new set of castings and have the head designed for what you are doing.
2. Keep an eye on piston design with that much dope...
3. 1khp is not nearly as easy to do as some may say....this is going to be a very costly operation...probably double of what it would cost to do the same with a conventional head BBC...plus the BBC would like the dope even more! If you are not class racing...you are crazy for spending this kind of money!
4. Do you have any idea how hard this thing is going to be on valvetrain?
dano73327 wrote:Even our 468 with a dry sump and naiser sheet metal manifold with a good dominator was still 20hp off and I don't think he's going to build it that big. I will say though that the more displacement he can get in that block the better chance he will have of getting to his 1000 hp goal.
dano73327 wrote:No offense, but you should build a 1000hp NA 365cid small block sometime and then tell me about how easy it is. If it were easy everyone would be doing it. That's like a badass pro stock truck engine and not too many people were building those and running up front.
I like the idea of a 4.2 bore but it'd be a LOT easier with a 4.125 stroke crank if you can fit it in there. 457cid as opposed to a 365... There would be no comparison.
L89 Chevelle wrote:This has been just my opinion but after I have been seeing 860hp with 1 830cfm carb, single cast intake, 12to1 comp, 55mm cam with .875 lifter, 4.184 x 3.26 stroke make that kind of power and turn 9500 rpm I think that
fab sheetmetal intake
heads tuned up by ( Larry or Darrin etc.)
60mm cam with full roller package
13to14 to1 comp
and still turn it no more than 9600 - 9800 rpm
Just my 2cents, but I think it can be done.