There's several variables in trying to figure it out. What does the mild port job consist of? Just a cartridge roll to remove the roughness, or going in there with a carbide bit and opening the ports up fairly decent? Any bowl work? Figuring your average aluminum headed combo is around 280-320 RWHP, I'd estimate you'd be somewhere closer to the low range of that with the iron GT40s with a cam swap, too.
With no cam or tune I'd say 250 to 260.
Grady
your gonna have a tuff time getting it running with no cam in there
Stepping up the rocker ratio is one of those mods that is highly over rated.
Yes ... they give a gain ... no doubt about it.
But it is only a hand full of extra ponies ... very small.
I see that mod as being very similar to the mid pipe.
Sometimes, peeps quickly at first go for a mid pipe change and soon there after, they learn about the advantages with LT's but they've already committed themselves with the shorty pipe.
Going to 1.7 ped rr's (the only choice for oem iron heads) influences peeps rocker decision when they step up to Aluminum heads.
Another thing about the 1.7's is they limit you with cam choice too.
I say if you have plans for higher flowing heads or a cam ..........
DON'T do the 1.7 rr thing
They don't give much extra zip
and
Why buy rockers twice
OH YEAH ... if one does 1.7's
and
then goes with TFS for a choice in heads
They WILL buy rockers twice.
Just a little out loud thinking based upon what I've seen on these boards.
Grady
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?