Darth_V8r

iTrader: (4)

So, ummm, this happened...


538/441. No power adders

big hammer

Wow! That’s darn near 20 rwhp over the record from what I remember.... pump gas compression?

SoFla01SSLookinstok

Nice! Got the VP on I see. Do you have a guage?

Darth_V8r

iTrader: (4)

I didn't install a gauge but the valve pops at 13. 11.5 compression. Cause 91 octane in AZ. Brown

HioSSilver

iTrader: (8)

Hella build Darth out of a simple h/c dd car.

NAVYBLUE210

Congrats Jake!
Outstanding results, so 13" from the GZ Sportsman Pump.
What did they recommend as a max for DD without
squirters or coated wrist pins?
Just curious as I have heard 10-12", but conservative
Tony suggests 8-10". LOL

98_WS6_M6

iTrader: (18)

Awesome buddy. Congrats!!!

big hammer

I don’t think those gains are just from a VP. I think he made a couple small changes

Darth_V8r

iTrader: (4)

They recommend 12. I am in a unique spot since I'm burning so much oil now. Like 200 miles to the quart. So I didn't worry about it. See what it does and that's that.

I really think the reason it gained more than typical is my ring seal is very bad and the pump helped seal it. Or else if it was tighter, 550 might be doable with 12:1. But then you're into different stuff altogether.

Zmg00camaross

iTrader: (11)

Some sweet numbers for sure. What is the combo? I must of missed it.

Darth_V8r

iTrader: (4)

The link in my sig is the fastest way to answer that. First post has all the deets.

If you're REALLY bored, read the thread and you'll see every success, failure, score, bump, bruise, pimple, and wart.

Firebirdmuscle

iTrader: (16)

Jake that is awesome man. That is a number you should be proud of and it runs the number and trap at the track as well to back it up. Couldn’t have happened to a better guy. Car has impressed from the beginning man, congratulations.

jhshnh

Congrats! You're making me want to go ahead and get my setup done!

Do you feel the difference in power and does it seem to rev/accelerate quicker with the vacuum pump?

Darth_V8r

iTrader: (4)

Thanks guys! Yeah I feel it more as throttle response than anything. When I upshifts, if I hit in the meat of the torque, it's crazy. A light weight crank and rods would rip even crazier. But then it wouldn't be stock short block, which I was trying to preserve.

Jtm2085

iTrader: (1)

Unbelievable numbers man, great job! What have you changed up since your last dyno?

adamantium

iTrader: (3)

Nice #'s alot more stout then most stroker stuff i see in this section

G Atsma

You mentioned bad ring seal, its attendant oil consumption, etc., and how the vac. pump helped with that. Had the ring seal been very good, would the pump still be a help?

big hammer

Bepis

adamantium

iTrader: (3)

just noticed the sig didn't know he was in the crew, makes sense now. I was talking about a specific brutal 383 build on here that just pulled out brutal #s

Darth_V8r

iTrader: (4)

Thanks guys! The vacuum pump and timing were the main changes.

Most of the strokers I've seen pull that kind of power are way higher on torque. That's pretty much the difference. Like if I dropped a 383 under it, I think power would be the same but with 480-490 torque vs 440. In general, I rather the bore be bigger than the stroke. That's really only gut feel more than anything I can point to scientifically.