Ive been trying to find the old madmax posts with no luck.

I am building a 420 stroker with dart pro 180 heads i have a stealth ram but id prefer a more "tpi" look. I just picked up a cheap set of after.market runers though i am unsure what brand (not edelbrock i used to have some) and have been investigating siamesed possibilitys.

Ive been seeing conflicting reports on effectiveness and technique.

any chance that i can make a siamesed base and or runner set up feed that many Cubes or should i put the (either asm or slp) aftermarket runners up for sale and just use the HSR?
if i do keep the more "stock" set up do i just Siamese the base? Or do i also do the top and bottom of the runners?

 

Neither. With a 420ci engine and decent heads you'll want a FIRST TPI intake.

Looks stock, will feed that engine easily. And out of the box better than any aftermarket mash of TPI parts with less work.

https://firstfuelinjection.com

 

Picked up a ported stock base and the slp (i think) runners and a stand-alone harness from Craigslist today for $200. They look monstrous!
i like the tpi look, i like it better with the fat runners.

I am building the 420 becouse i picked up the crank pistons block rods gaskets bearings ect almost a full rebuild in a trade. If he had had 305 or 350 parts to trade... That is what i would be building. It is probably way too much motor for my rear end and 700r4 so maybe a little "governor" in the form of a reatricted intake is not a bad idea? Besides, i have an HSR and the runners, i dont have $800 or a first intake.

 

 

Yes. I had the HSR on a 383. Lots of fun!

The dart SHP crate engine is a 400 with dart pro1 180 (same as mine) heads they advertise 524 hp and 525 tq with a cam of only 580 lift... At only 9.5/1 compresion.

Again, got the heads in a trade and have virtually no budget... So i use what i have. In fact this entire build is parts i traded for, bought at a pickapart found dirt cheap on CL or removed from vehicles my buddy got for free before he scrapped them...
i would love input on how to do what i am doing more effectively, but sudden changes in direction will only happen if i find a SMOKING trade or killer deal!

 

 

The hydraulic roller cam opens and closes 2.02/1.60 valves in Dart Pro1 180cc heads. "The 180 head makes the best power on this engine package. We tried the 200 and 215, but the cam is little. The 180s work much better,"

The lobes lift open the valves to a maximum of 0.540-inch on both the intake and exhaust side.

Dyno testing of this simple combination resulted in an impressive 525hp and 524 lb-ft of torque.

http://www.superchevy.com/how-to/engines-drivetrain/sucp-0909-special-high-performance-chevy-block/

I think it may have been about matching up port velocity with the lift and rpm range.

 

I found a reply from mad max on a different post... Clicking his name caused a "you are not authorized" type of an error.

This is a problem as a lot of posts that ask questions about siamesed runners generate a responce of "search for max"

Question is, if a tpi runner and base were fully siamesed would it flow as much as a HSR?

if you siamesed the base and left the runners divided (my preferred plan) would the divider cause enough of a disruption to really be noticeable?

 

Found it! Seems like he siamesed the base only. Now i have to investigate the effect of leaving the runners separate but porting them.
also, sbould be able to add material to the top of the base so that the "roof" of the "second plenum" was flat or curved up...