just wondering if anyone had done this and if so how well they liked it for streetable performance, or on the strip, and if you did what kind of problems came up with or where you got your parts and an approx cost start to finish on just the engine. Id like to do this and use my TPI set up wth the SLP runners and highly ported plenum.
any input would be great.
thanks
Jack

 

the 6" rod will move the power band up slightly but the long runners will prevent much benefit. Get a 5.7 or 5.85 rod and you will have less issues will ring support and location.

 

This subject has been brought up before. Here's some previous posts on rod length. You'll find your answers there.

https://www.thirdgen.org/techbb2/sho...threadid=26757

https://www.thirdgen.org/techbb2/sho...light=long+rod

 

long rod stroker right here !!!!!!! lmao i like it and if i had to do it over i'd do it again. i used a steel crank from eagle that i had internally balanced using 6" h-beam eagle rods and keith black pistons. smokes just about everything on the street with the 3.73 gear and slipping tranny. currently puttin my 9" rear end with 4.33 gears and rebuilding the tranny with a manual valve body and i'll take it to the track to see how it does.

 

Fast3rdGen, what heads/cam did you use, and are you running the stock 700? I have an intake set up that ought to flow pretty well, its RCR's old SLP and extremely ported base and plenum, so Im not restricted by the stock manifold dont know exactly how far it would rev, but I know it will go past stock, one of the reasons for the 6" 383 is, I read an article from hot rodding titled "the 350 chev should have built" and they used a 400 block a 327 crank some ford 300 6 cyl rods and it pushed the power way up and they had lots of good things to say about the long rods fr the duration at the top and being able to make lots of power on cheap gas. so I figured it should be able to be done on a strocker and pull similar results.
Im just in the planning/dreaming stage now
thanks

 

The 6 in. rod pushes the pin up into the oil ring. No problem as long as you get the right rings. Longer rods will always run better on fuel injected engines. There are lots of reasons for this.

1) Longer rods spend more "time" at TDC making the combustion event happen under higher pressure longer = more power

2) Longer rods have less piston acceleration which means that they don't draw air out of other intake runner before air can move through the throttle body plus it puts less tension on the con rods.

3) MPFI engines don't care about intake air velocity as much because air velocity is used to atomize fuel.

The only thing long rods hurt is a carburated engine that needs a specific air velocity to work properly. High piston acceleration makes the carb engine work better on the bottom end.

 

monte-ss

i'm using a set of old DZ302 heads from a 69 z28. (186 double humps) that i went full roto-rooter on with a die grinder lol. they have manley race flo valves (2.02/1.60) also have the larger diameter double springs. the cam i have i bought through the dealership i work for from the gm performance parts catalog. it is a blue print of the cam used in the 302 for the trans am circuit back in the late 60's. its a solid lifter cam with .493/.512 lift and 257/269 durration @ .050. its a pretty nasty little cam. makes awesome power from about 4000-7500+ rpm range. i run through a th400 turbo tranny with a tci 3500 stall convertor. of course this is a carb'd engine btw. it's alot of fun on the street, but at the moment it is up on jack stands being gutted like a fish for the roll cage, fuel cell, and 9" rear end.