3.5L Horse Power Guessing Game - Step Right Up & Try Your LUCK !
 

Hi Guys,
I'm getting a Dyno next week and I wanted to poll your ballpark estimates on the estimated Horse Power.
I know there are a lot of variables for you to consider but this is just for fun to see how you all do.
I will post the winning estimate next week.
The winner will get an Honorable Mention posted after all the results are tabulated.
Feel free to ask questions and remember this is just for fun.
My 1987 930 Specs are as follows:
- 3.5L with higher compression pistons 7.5 to 1.
- Larger Half Bay Intercooler.
- Fresh K27 7200
- .8 Bar Spring (for the summer)
- Headers with Fabspeed muffler
- CIS
- Single Plug/Cylinder
- Stock Fuel Delivery
- Stock Heads
- Stock Cams
Is there anything else I can add?
Good Luck

I have a 3.5 but with more goodies and I run 16lbs with meth injection. I am in NY also. What part on N.Y are you from?

I think you are going to put down 320 rwhp.

OK, JBrown is in at 320 rwhp.
Wow,
I'd love to see your Baby !
I'm on Long Island. I hope you are not way upstate.

I think JBrown has nailed it, but I will say 335 just to be optimistic

Gee Fletch, I hope your estimate of 355 comes true.
This is turning into a real horse race, no pun intended.

You guys...
 

make me laugh, which gets you 325 RHP. Philip

I would say about 340rwhp @ .8 bar

Put me down for 330rwhp @.8

I say 328rwhp at that boost.
Watch your AF ratio and let us know what they read as well.
Good luck

345 rwhp (+/- 5 hp)

What type dyno and will you be using sae or std correction factor?

Hi Ollie,
Thanks for the question.
I not sure what what Dyno set up my shop has but I'll ask tomorrow.

327 rwhp

Someone's gonna nail it on the button..

Thanks guys for all your estimates and having some fun at it.
Keep your HP estimates coming in.
Operators are standing by to take your estimate.
Enter to win right Now !

NY930, I am in orange county NY, by the woodbury commons.

Yes ....... the cams & ignition timing ! :)

Your mods will increase midrange torque more than horsepower because your cams are stock and your stock heads, injector blocks, and intake manifold have tiny 32mm intake ports.

My guess will be around 330 horsepower on a chilly day. Less than that if it's summer and in the 90's

edit: I mean 330 flywheel HP on a chilly day.

337whp
Good luck.

Hi Thierry,
Thanks for your question.
I have stock cams and I'm embarrassed to say I do not know what my mechanic dials in. Maybe this could be a new thread.
In your opinion, what inanition timing would be best for my modifications?
Advice from all is welcomed.

Just 2 cents more :D

As to the cam timing, I think there was a little room ( stock is 0.7mm if I remember correctly.... maybe it could have been delayed to 0.3mm or less )

As to the timing, I think it can be adjusted to 24° on boost without problem ( assuming fuelling & AFR curve are correct and injectors are in good conditions )


As to the power question, that's not easy to predict what the dyno will measure. However according to your descprition, it is reasonnable to think that you will get something between 320 and 330 rwhp ...........ah it's a gambling , so I bet on 322.5 :D:D;)

Hi Thierry,
I like the way you think.
Very logical. Maybe I should meet you at the Casino and see how we do?

321 RWHP.....Good luck with your build and test!!!

301.5whp. Low rpms for top hp.

I would say 295 RWHP on the first pull. More after the dyno tune.

very much depends on dyno type

considering my 3LDZ'd POS w/ only a filter, dual-out RL8, and Garretson IC put down 286rwhp on a Mustang @ 0.87bar and 40*F, I'd think you'd put down more than some of the guesstimates above

action pose (the foreground does nottttttt suck):

https://lh3.googleusercontent.com/-s...2/IMG_8275.JPG

I'm with the higher end guesses I guess - put me in for 341.2 8-)... pretty useless guesses tho unfort w/o knowing if Mustang / Dyno Jet / Dyno Pak etc...

Good luck, have fun!

Hi Krasuskyp,
Thanks for that great photo.
I'm trying to figure out how to post a photo while using my iPhone. I'll find put what type of Dyno my shop has.
I see your color is red.

jah mon, red it 'tis:

https://lh4.googleusercontent.com/-k...2/IMG_8277.JPG

y tu?

Thanks again for the photos.
You really brighten up this monochromatic forum.
Yep, mine is yet another Red 930.
But yours looks cooler with the euro bumper or did you just take off your big black tits.
Whoops, did I just say that? I wish I can figure out how to send photos. I'm always on my iPhone and I hate to use the laptop anymore. Do you have to upgrade a subscription. Getting back to colors, Porsche in the 70's had over 20 cool colors that you can order from the factory. The problem was, the dealers only order the safe colors. I had a 77 930 that was 'Ice Green' all the PCA guys loved it.
1987 Red 930 3.5L
Long Island, NY.

322, then when the engine loosens up, 334

sorry, but I'm a sucker for Coup Quartto's :cool:

I'm going to go with 303.5 RWHP in the summer heat.

NY930-

ayup, I'm def multichromatic 8-)

Mr. Merlin-

I hear ya, I dig 'em too. I got a ton of buds w/ all sorts of cool ones. The dyno was @ EPL in CT here, that's the owner's car and it's pretty gnarly.

Was totally tits @ Climb to the Clouds last month, the urQ guys gathered up ~19 of them together there - def badass. I've got friends w/ stockers, garage queens, rally cars... then AAN conversions pushing 400+++awhp. Love it...

Any dyno results yet? Did I win.

Sorry guys the Dyno got seriously delayed.
But we are all winners when we share our advice and help others on this most valuable forum.
I don't know how we got by in the 'old days' when I was struggling with an old rusty 356.
Thank God for the Internet and this Forum, but most importantly, thanks to all of you who participate and lend their time and advice to others.