Opinions on new Upper and Lower Manifold.. please

philly3384 · Apr 11, 2005

I have a 95 cobra with edelbrock performer heads, e cam, full msd ignition,75mm mass air with a 65mm throttle body but wiill be getting either 70mm or 75mm with manifold...What upper and lower manifold should i go with? I want my most bang for my buck... im gunna stay N/A so there wont be a supercharger either so i want this to be atleast a decent upgrade and not something that is a lil better then the cobra one.i already have... any suggestions would be great .thanks alot.

dstanggt50 · Apr 11, 2005

performer or rpmII, or you could just port the cobra that you have.
Just my opinion though.

tmoss · Apr 11, 2005

dstanggt50 said:
..., or you could just port the cobra that you have.

Probably the best idea but it sounds like he wants a new intake.

94GT40 · Apr 11, 2005

philly3384 said:
I have a 95 cobra with edelbrock performer heads, e cam, full msd ignition,75mm mass air with a 65mm throttle body but wiill be getting either 70mm or 75mm with manifold...What upper and lower manifold should i go with? I want my most bang for my buck... im gunna stay N/A so there wont be a supercharger either so i want this to be atleast a decent upgrade and not something that is a lil better then the cobra one.i already have... any suggestions would be great .thanks alot.

In one of the last couple of issues of 5.0 Mustang they tested the latest dual plenum BBK intake against an Edelebrock performer, a GT-40, and a Trick Flow Street. If I remember correctly the GT-40 was within about 3 horsepower of the best ones on the market. I believe the Cobra flows right with a GT-40, so why would you change? For only the chance to pick up maybe 5 horsepower is it worth it?

It blew me away that such a supposedly hightech intake was only a few hp better than the old GT-40.

super302 · Apr 11, 2005

dstanggt50 said:
you could just port the cobra that you have.
Just my opinion though.

thats what i'd do

philly3384 · Apr 11, 2005

how is that possible? which intakes was it up against? was the holley systemax or the edelbrock rpm in there?

mustang_2099 · Apr 11, 2005

You won't be disapointed with a RPM II

dstanggt50 · Apr 11, 2005

philly3384 said:
how is that possible? which intakes was it up against? was the holley systemax or the edelbrock rpm in there?

It was designed really well. The test was against a bbk ssi intake, edelbrock performer, and I think it made the best lowend and midrange hp and tq, while only being down a few hp on top. It was a mild street combo, and different intakes might have done better with a different combo,(more aggressive cam, ect..). The combo had a comp cam, afr 165's, full length headers, ect.. Might be better to port to get those few extra hp, but you could get a different intake if you want, or are going to get a more agressive combo. I believe the gt-40 and cobra have the same lower, different uppers, and flow #'s are close, I think.

Venom351R · Apr 11, 2005

Yeah Port the Cobra, it will flow just as well if not better then Trickflow/Edelbrock Intakes and you wont be speding $400+ on a new intake when you already have a decent one.

slytherin · Apr 11, 2005

port polish whatcha got and get the same done to the heads, or get some rearend gears if you dont already have em.

tmoss · Apr 11, 2005

If you want a dyno example of how a well ported Explorer killed an RPMII - go to my website and read the "why port an intake" article.

Opinions on new Upper and Lower Manifold.. please

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