Quote:
Originally Posted by Pete
Hmmmm
Siamese vs Nicely Ported
Here are some thoughts.
Today we have big inch Z's with smaller cams no siamese intakes that run good 1/4 ET's/MPH.
Technology/performance has gone beyond Siamese intake, today we go just as fast with less.
Siamese/droped plenum does not hurt performance it does give you reserve air.
Tested Hogan's Intake (for sale) gained power raised peak RPM.
Hogan's comes with all lines,pressure regulator/gauge plug n play.
I would consider cost to gain.
Pete
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flow velocity is a very important factor. really big ports can hurt that and while they work ok upstairs, not so great getting rolling and hampering the overall area under the torq curve is not a good approach for a street car. you want that torque curve to be wide and meaty rather than "peaky" like a race car.
the LSV has the "state of the art" bifurcation ported plenum that was heavily ported and the "best at the time" but clearly the heads aren't ported that well, and no fancy drop plenum ect... it's and old school build and not that impressive relative to Pete's work with top end porting and cams relative to displacement.
as pete is saying "today we can do more, we have the technology"
and pete proves it every day by pulling 129 with a stock block which is as good as I can do with a 390 and the "full boogie LPE" package
key is in the endless hours of experimentation, tuning and optimizing the overall combination. Pete you are the man!
like to see that hogans intake!
kirchoffer spent a TON on his fancy fabbed intake on wild jeal cams and 421 build only to discover the design didn't seem to help much. I remember seeing it in BG and like Ron H said the "top plate" would flex up and down as he would rev it
he only got to run the car a few times and eventually blew a freeze plug out of the back of the motor
but overall there didn't seem to be a huge gain.
I've always wondered what the LT5 would do with an individual runner crab style harrop slide throttle intake. it would clearly be soggy down low, but flow like gang busters up top. ahhh.... it's good to dream and experiment, now I just need that 14th mortgage
