Horsepower estimate

[SgtMarshal]

I just ordered the rest of modifications that im going to do to my grand prix. so far ive done a wizaired cai, a ported tb and spacer, ive done ported exhaust manifolds, ported crossover pipe 2.5" downpipe no converter and a 2.5" cat back. and im currently running a 3.4" pulley. I have no KR.

I am going to do the gen 5 swap and 1.9 rockers and I will probably do either a 3.5 or 3.6 pulley depending on kr.

I'm just curious how much horsepower I can expect after I do the gen 5 and rockers.

[dsmuts]

Get headers and you'll probably be 250 ish whp

[Sven the Sexman]

I'm with Dan on headers...I think 250ish WHP sounds pretty close with a decent tune after all that.

[SJAndrew]

more like 200 at your altitude.

sucks doesn't it.

[Fivefingerdeathpunch]

Invest in a WB at this mod level.

[SgtMarshal]

im not really sure how a wideband works. would you enlighten me please.

[dsmuts]

It goes into the exhaust just like an o2 sensor and tells you what your air fuel ratio is. It's great so you don't run to lean or to rich.

[Tuner-Extraordinaire]

I just ordered the rest of modifications that im going to do to my grand prix. so far ive done a wizaired cai, a ported tb and spacer, ive done ported exhaust manifolds, ported crossover pipe 2.5" downpipe no converter and a 2.5" cat back. and im currently running a 3.4" pulley. I have no KR.

I am going to do the gen 5 swap and 1.9 rockers and I will probably do either a 3.5 or 3.6 pulley depending on kr.

I'm just curious how much horsepower I can expect after I do the gen 5 and rockers.

210-215whp corrected.

[TLSheff]

Really? 210-215whp AFTER the GenV and Rockers?

[Elite6]

If you don't wanna get down and dirty with a cam, I would port the Gen III, 1.84 rockers unless you are doing springs etc.. and some headers.
How fast you looking to go?

[Adandos]

Check out our updated virtual dyno app, here is a short link ...

http://horsepowercalculators.net/vdyno

You can model these changes and other mods with it. We also allow you to model your altitude vs a stock or baseline run. I'm afraid you're going to be surprised with how much power you're losing to altitude ... I had a customer building for a '300hp' twincharged setup on a mini cooper and when we adjusted for his altitude it ended up being about a 225hp build even though it was advertised and dyno proven at sea level as a 300+hp setup.

We don't model head porting and surface finishing obviously but pretty much everything else you can test on our dyno.

[blueguy]

Probably about 240~ish.

GenV, rockers, PEM's/DP...which need to be tossed for headers ASAP...then I'd say a solid 240WHP on a 3.6"...should be easy.

Then again, throw out that TB spacer, it's junk. And why do you have a ported TB? No real need for it...are you tuned now then I assume?

[Tuner-Extraordinaire]

Probably about 240~ish.

GenV, rockers, PEM's/DP...which need to be tossed for headers ASAP...then I'd say a solid 240WHP on a 3.6"...should be easy.

Then again, throw out that TB spacer, it's junk. And why do you have a ported TB? No real need for it...are you tuned now then I assume?

Not at his altitude (7,000ft). Which is also why he's not seeing knock now.

Expect dyno read of 205-215whp at max depending on the tune on a 1.9rr, Headers, GenV 3.5 up there.

[winterstorm]

i would say around 100,000,000 whp maybe more.....lol