SilverXJ wrote:F&B throttle bodies also make you a 70mm tb.
The problem with modifying the intake manifold runners is that they are a) very long and b) on the later manifold too twisty. You could use a long tool on the earlier manifolds, but you are stuck on the later ones. One option is .... heck.. can't recall the name.. but they use a sort of sand slury to run through then manifold to open it up. But its a very uncontrolled processes.
I'm more interested in the AL head for the ability to run higher compression on pump gas.
As for what cam.. if you want a cam to fit your vehicle, engine and personal wants I recommend going to a good custom cam grinder and get a custom grind. I'm not talking the likes of Comp Cams though.
Extrude honing is the process you are referring to.
You can run high compression just fine on pump gas with iron, it's all about managing pressure and mitigating hotspots I wouldn't let material of casting stop me from running what I want to run.
Not really. Mine is 525 lift on both,218-228 @.050 on a 110.With 10.3-1 compression it idles at 650 in gear all day and pretty smooth actually.You can tell it has a cam in it but nothing radical by any means.Granted alot has to do with the tuning but even with the stock pcm tune it wasnt bad just a whole lot better with it!
With all of this talk about the TB/intake it makes me want to also consider the exhaust. Is there much restriction in the stock exhaust, is it necessary to upgrade the exhaust along with the bigger TB?
akadeutsch wrote:With all of this talk about the TB/intake it makes me want to also consider the exhaust. Is there much restriction in the stock exhaust, is it necessary to upgrade the exhaust along with the bigger TB?
It would be in your best interest to do so, most that are stroking are upping displacement by at least 13%, plus improving VE by some degree too. When either or both happen, your demands- demands for fuel, demand for timing lead/advance, demand for octane, intake/exhaust flow requirements- all change along with it.
Makes me wonder if a cammed 4.0 with proper tuning and bolt-ons would out do the majority of the "poor man's" strokers as seen on here, all because of configuration.
Absolutely!I would love to find an 1 5/8 header instead of the stupid1 1/2 tube headers everyone sells are for stock motors maybe....Thought i had one as it was listed as 1 5/8 but turned out to be 1 1/2.Here is what i know as ive done it.lol Anything is better than the stock exhaust.One word of caution for some strange reason these get loud fast.I started out with the typical 2 1/2 inch exhaust on my stroker minus the rear cat. it was ok with a dynomax super turbo.Next came removing the front precats and again it got better as it should.If you check any exhaust manufacturer 3inch is at the bottom limits for a single exhaust 300hp 4.7.Still not happy because i knew there was more left.So i made a complete exhaust.Two 2 1/4 inch pipes leading into a 3 inch exhaust all the way back with a dynomax ultraflow muffler with enough cfm rating not to hurt power. It was definitely worth the work making the system only problem is its loud.Loud enough im getting stopped while driving normally.Sounds cool but not good when youre 44 years old and want to carry on a conversation in the car.lol So i go back to the trusty super turbo and it kills the power because they dont flow nearly enough cfm.Like half of what it should need.So i wound up using a magnaflow muffler off a dodge truck i think its a few inchs longer(=quieter)and had the right outlets.Still sounds good,real quiet once youre cruising,sorta loud if you put your foot in it and doesnt hurt power any.If i was going to build anything bigger than what i did id definitely go at least 3 1/2.What we really need are some bigger headers and a real intake(not 30 year old technology) then we could really see what you could get out of these.I know the one builder is using 1 5/8 stepped to 1 3/4 on these!
I wouldn't let material of casting stop me from running what I want to run.