Title says it all. Thinking about a stroker for our next motor, just wondered what the pro and cons were for the options 4.250, 4.4, 4.5. Don't know if one is better, more reliable than the others, if by going with a certain one is there a pitfall trap where you basically have only 1 choice and way to go. Block will be a girdled, filled, iron block. Done have the money for the AL block. But other than that nothing is set in stone.
What kind of power you wanna see? Reason I say that is a 464/470 with a killer set of heads will make some nasty power some rpm will be needed but no issue if done correctly
I'd rather rev a stock stroke motor than have to hold back on a stroker......if using iron block. You just can't rev the 4.25 and 4.50 strokers without tearing the blocks up. If you had more bore it might be worth it (new block) but you can't make that happen with an iron block.
What do you consider "revving" a 4.25 and 4.50 stroker? I know of several that ran many seasons and several hundred runs all the while turning 7k plus at the stripe.
Our current combo is 464 stk rod motor, with iron heads we have seen 10.90s in pur 3800 lbs car, and no real issue living at 6000 to 6500. Swapped the heads to cnc te2 and just got up and going, hopefully get track time this weekend. heads flow 380/269 @ .700. Mike has a never fired no block he is doing for us, right now it's slated to be a better rod solid fill 464 with girdle. Basically more compression, better rods, hopefully the ability to live at 6500 and see 7000 when needed. But seeing no pistons have been order, and only a crank turned and molnar stk length rods........which will never be wasted........toying with the though process of adding some stroke, really hate the though of building another full motor to only gain compression and better rods.......... Can't see myself turning a lot more rpms over the 6500 maybe 7000.
The cost to HP gained ratio isn't worthwhile IMO, with those heads and a nasty roller with 13 to 1 it would make some pretty serious steam with a stock stroke
A 482 would be a great way to go. IMO the 494 with 2.00" rod journals to get that much cubes make the journals to weak for the BBB heavy rotating assembly. The 482 has a bit more beef left in the rod journals @ 2.100" and the new 482 rods just came out I think I read here. Anything more than a 494 cubes with a 4.150" stroke you would need a billet crank to go any bigger unless you go where no man has gone before and have the rod journals taken smaller than 2.00" with a stock crank. Perhaps heat treated and then cryogenically treated it may stay together with a 4.300" stroke? There are Nissan rods that are 6.495" with the 1.850" rod journal size that would work with a piston with a 1.925" compression distance if you want to play Star Trek. The Star Trek stroker would net 511.24 cubic inches! "Go where no man has gone before" It has probably been done but I wouldn't get a billet crank just to add cubes with a factory block! Would make more sense to add boost if I wanted more power out of my combo than to get a billet crank for a factory block.(if your racing class permits boost?) The factory crank is already stronger than the factory block is so.............
Is this a strip only motor??? Dave Benisek's motor in the GSX car put out 800 hp @ 6500rpm, with 1-4bbl carb, 462". I am looking at the dyno sheet now. I still have the car with a skylark body I am reassembling. The motor is in John Everett's dragster and went a best 7.60 @ 191. (with injection, it would probably go faster with headers and a carb) In the GSX car it was low 9's at around 3450# + driver from what I remember. You are saying your heads flow better than the ones on that car. (I had them flow checked by 3 different vendors including Mike at TA. I stood there when his head guy flowed them.) If those times are within your parameters why would you stroke it? YES it is an iron block!
Not a fan of the star trek motor idea. But maybe someone will try it.....it won't be me. Lol This is a bracket car only, and from what I have seen at the track boosted cars seem to have a little issue being consistent. I love hearing all the great idea. If molar makes the 482 rods, I might contact them and see about a swap, I have an nos crank I could send down to have ground, the other crank is for sure not wasted. That would gain 20 cubes and not much expense. I know the heads will support good numbers, Mike from amp flowed them after Bob from finishline cnc ported them. We wereally all very happy with the numbers.
I like the combo of a TA Block, stock crank with 4.500 bore for 496 cubes. By the time you buy a crank at $3800 and girdle a block for another $1000 plus it makes sense to start with the TA block.
I like to put as much stroke into something as possible. Make the power at a lower rpm,with a broad curve. I like to drive everything too. I don't really like to spin it to the moon.
Yes, they are: http://www.v8buick.com/index.php?threads/482-rods-now-available.324448/ Pistons are being done also
If I can get the same ET out of a car,with less rpm,and drive it anywhere,why would I need a high-winding,race-gas engine to get the same result? It is all about what your preference is.
Jim if you can send me the info too, give me something to think about as well. Also thanks for taking the time this afternoon to answer some of my questions when I called
