Mix and match combo questions

Id go with better heads if you want 450-500 HP w/ boost. AFR's or Trick Flows

Redline_351R said:

Id go with better heads if you want 450-500 HP w/ boost. AFR's or Trick Flows

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agreed... especially with a nice set of twisted wedge heads

Throw enough boost at a sbf and your choice in speed parts is not gonna
make all that much difference from what I've seen with past boost threads.

I've seen quite a few low budget blown combos with nothing but
OEM heads/intake, shortys and the like pump out well over 400

Keep in mind they did not move air all that well with the budget parts so
they were usually at 12 pounds at least and more at times

Sure ... aftermarket parts with boost is gonna make more power
but
I'm just saying they aren't a must for what you got in mind

If all you wanna do is a 12.00 et ... give or take a bit .........
you don't need 400 or better to obtain that goal

Grady

You dont need alum. heads to hit 400+rwhp. Local guy had E7's, stock cam, cobra intake, a lot of bolt ons, tuned, and 12-15lbs of boost and was at like 425rwhp.

You are looking at needing more than 10lbs of boost probably.

Susp. is going to be what really makes or breaks you. Add that your wanting to autocross it...your going to have to make a comp. An evil autocross setup will suck on the 1320 while a great 1320 setup will suck on an autocross. Aim in the middle and it wont be a standout but should still be fun.

I remember reading and hearing that a fox with 50 hp over stock...has the power to run 12's...if it has the right susp. setup. Same thing with our cars basicly...with the need for a little more hp. Killer is proof of that, what 300rwhp or so and 12.0's or something and VERY possibly high 11 capable (old setup) and his is a vert.

The amount of boost depends on how good your tune is but generally most people wont run more then 10-12PSI on a stock block.

Boost is one of those things that is misunderstood by many

Lets use 2 very different combo examples
to shed more light on the subject

1) A little stocker GT Stang with all OEM parts in place
2) A GT Stang with TFS h/c/i, LT's/OR mid pipe, larger tb & maf

We put a Vortech on each combo with the same pulley setup .......
and what do you think we will find

Less boost on the h/c/i than on the little stocker

Why you might ask

#2 Combo flows more air ... way more air ... than #1
thus
#1 Offers more restriction to the blower so it's boost reading is
gonna be a higher value

Now ... Lets ask some questions here

Does that mean the combo with the most boost is gonna produce
the most power ???

Here is where one has to aks themself .......

Would I rather have the combo with the better flowing parts
at less boost

OR

Would it be better to have the stocker with 2 to 4 pounds more boost
but
With the tiny, restrictive, OEM parts holding back the blower

OF COURSE ... One could always be tempted to pulley down #2

Then that greedy fellow ... Well ...........

Maybe he would like that mod where one ends up with ......

Two 2.5 liter sbf motors instead of the one 5.0 liter sbf motor

Boost is all about restriction ... or ... lack of it ... to the air flow
generated by the blower

My take on it

With an attempt to

Keep it simple

Grady