svttech76 said:big bore is the way to go on the mod motor. our bore to stroker ratio is way too far in favor of stroke already... in fact a 347 CI 5.0 based motor has a better bore stroke ratio than us.
You are talking about a pushrod motor. We are talking modulars. two different engines and our stroke is damn near the same as a 351 c.i Our bore is very small in relation and that is why Modular motors respeond well to a big bore set up. How will the big bore put stress on the block when it is resleeved? Please explain your comment as this is the very first I have ever heard of a Big Bore putting stress on a block.TweekedGT said:My 306 stroker is fast as hell. Way more torque and power than a 4.6. No need for big bore in my opinion. Especially wth the blower. It will put way too much stress on the block. Just my .02.
He has a 2V modular.blackfang said:You are talking about a pushrod motor. We are talking modulars. two different engines and our stroke is damn near the same as a 351 c.i Our bore is very small in relation and that is why Modular motors respeond well to a big bore set up. How will the big bore put stress on the block when it is resleeved? Please explain your comment as this is the very first I have ever heard of a Big Bore putting stress on a block.
blackfang said:You are talking about a pushrod motor. We are talking modulars. two different engines and our stroke is damn near the same as a 351 c.i Our bore is very small in relation and that is why Modular motors respeond well to a big bore set up. How will the big bore put stress on the block when it is resleeved? Please explain your comment as this is the very first I have ever heard of a Big Bore putting stress on a block.
TweekedGT said:You cannot make a 2V block into a big bore. You can only use the Cobra aluminum blocks. Check it out. VT only does Cobra blocks exchange. The most you can bore out a cast 2V block safely is .030 over, the cylinder walls are too thin. I've done a hell of a lot of research.
blackfang said:Actually you can big bore an iron block, but it must be wet sleeved. This process is somewhat cheaper than using an aluminum block, but the Darton M.I.D. sleeves needed are in scarce supply and can cost ~1,500 dollars alone.
However, most people rather use the aluminum blocks and they either dry sleeved (which can handle up to 20 psi and good for a mild blower set up or NA) or wet sleeve it as well.
Our stroke in stock form is 3.5" which is the same as a 351W which has 73 cubes more. The Big Bores go from a 3.5" to a 3.7" bore which benefits the DOHC motor.
I think it is safe to assume that the topic is about 4V'sNow that we have established that we are referring to the DOHC, again, why is it not safe to make a Big Bore and why do we not need it?
hey man dont get me started on this grammer crap...this is the internet ..iam not being graded im I.?:Zip2: i been out of school to long ,,im 40 old car tech. i just know motor words.stangGT97 said:big bore all the way... the valves in the 4.6 heads are shrouded because of the stock bore size, increasing the bore is a sure way to make some real power. btw, check your grammar, my head just exploded trying to read your post
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