OK guys I had my 87 vert back on the chassis dyno last night and thought I would share the results.
The only changes made from the last dyno test was removal of the factory exhaust and cats and installing a true dual 2 1/2" exhaust with Flowmaster mufflers and a chip done by Jesse (ski_down_it)
my new power numbers are a max of 254.3 hp at 4600 rpm and 331.7 on torque at 3200 rpm which is where the test started.
the power is very flat from 4100 rpm - 4900 rpm never dropping below 250 hp.
I made some progress but am still not where I wanted to be.
I guess the factory headers are still holding it back along with the possibly the heads.
according to a local shop they are only flowing 211 cfm at 600 lift on intake and 172 cfm at 600 lift on exhaust.
Plan on going to the local 1/8 mile track in the next couple weeks and see what she does but I dont expect alot based on the 2.73 Dana 36 rear.

 

What does the envelope mean next to the post?
Never seen it before or atleast never noticed it before.

 

The Envelope w/ black dot means you've posted in that post. Numbers look good for the mods too!

 

nice numbers .

 

I have to agree. Those are good numbers for the mods. I have always had to add a lot of mods to get any horsepower out of my engine. That equals money. Allen

 

In case the original post was not seen
I have a TPIS ZZ9 cam, cleaned up D port 113 heads, TPIS Big Mouth base, AS&M semi-siamised runners, ported plenum, and now a 2 1/2" true dual exhaust.
I was hoping for about 380 horsepower at the tires but I still have to get and install headers so maybe that will put me there.

Thanks for the compliments and encourgament

 

You aren't going to gain 130RWHP (at the tires) with a pair of headers..

 

You're going to have to do a hell of a lot more than put a set of headers to make 130whp, like a turbo or 2.

 

I know I said 380 horsepower but I meant 280 horsepower at the rear tires.
I know headers wont add 130 horsepower.
Sorry for the mistake