Nitroused383

iTrader: (10)

Get better rods if u want over 800 rwhp. Those gen 3s will pretzel.

OxTheGreat

I doubt ill be able to pull off 800whp right off the bat. But will work up to it increasing boost little by little. If nothing catastrophically happens ill be able to save enough to buy rods and pistons. My ultimate goal right now is a 9.xx sec 1/4 or 5.xx 1/8
Im told 750whp with the right weight and suspension can get you there. And part of racing (in my mind) build it, run it, break it and do it again better stronger faster.

denmah

iTrader: (2)

older 4.8 rods will fold up pretty easy

OxTheGreat

im really dreading pulling the whole bottom end apart again................. and now wasted money on rod bolts.. guess i need to work more OT

OxTheGreat

am i on the right track?

http://www.ebay.com/itm/GM-GEN-III-G...BZGzSx&vxp=mtr

subeone

iTrader: (5)

youll be fine on the gen 3 rods. Got several above 800+ trapping 140 in a 4500 lb 4.8 silverado so don't worry.

Gotit4cheap16

iTrader: (3)

Build seems to be identical to mine as well.

4.8
ls6 intake
billet s480 1.32 ar
80# injectors
walbro 450 pump
th400
3400 converter rated to 800hp

so far cars on old on3 78mm turbo and 4l60e tune so i need a retune and the car is currently **** off the line and takes forever to build boost. Should be retuned and dynoed in a couple of weeks.

OxTheGreat

Well this is making me feel good about my plan. Even though its wild

Gotit4cheap16

iTrader: (3)

yea i plan to let her eat and throw as much boost at it as i can. Ill post some pics and vids in a bit. Im going to have it tuned on e85

Forcefed86

iTrader: (4)

3.25 gear is a bad idea IMO. You need to rev the 4.8. Making a ton of power at low RPM is even more likely to bend rods. I was only around 5600 @ 150mph with a 3.25 gear and 30” tire. I’d put something like a 3.70-3.90 in it depending on the power you make.

Gotit4cheap16

iTrader: (3)

A video of my car at idle and dig tests as I promised. My cars been laggy but found out why and it's fixed now. All better and more responsive... I can build boost now.

https://youtu.be/iRhRuEPdLKQ

OxTheGreat

rear end gear still messes me up, im so use to truck gearing. My brain cant translate what i know about 4x4 gearing to drag car gearing. Not to mention only running two gears also messes me up
*edit* well we've talked about details in my build off and on. safe to say that out of the above ill shoot for 850whp or until it explodes and i buy another JY and do it again but learn. with a 3.70 will i have enough gear on my PG?

OxTheGreat

was the video before or after you found the blown pipe?
that thing idles pretty nicely. im getting super excited to hear mine. its coming together quite nicely

Gotit4cheap16

iTrader: (3)

Video was after I found the blown pipe and replaced it and went for some test runs. Mind you the cars still isn't retuned yet and still waiting on the word from my tuner to get retuned. Before the car would not make boost like that... Guessing it was the blown pipe.

Forcefed86

iTrader: (4)

¼ mile or 1/8th? A PG is like any other trans really. It’s still 1:1 in high gear.

You’ll want to rev that 4.8 around 7k ish. More if you run an aftermarket manifold. Use an online gear calculator to see what you’re trap speed will be at 7000. Use a HP VS trap speed calculator to see what your weight car should trap around your desired HP number.

3250 race weight at 800hp should trap around 145. Add 10mph or so to account for converter slippage and room to grow. So I’d look for a gear that nets you around 155-160 at 7000-7200.

With a 28” tire a 3.70 nets you 158 @ 7k 162 @ 7200. (that’s not accounting for slip of any sort.) That’s where I’d start personally with a 4.8 and your goals in a ¼ mile car.

You can find used 9” nascar gears pretty cheap on Ebay. Many times they will be REM polished and/or lightened. I’ve used them several times and have yet to damage one. Even the lightened gears worked really well.

http://www.wallaceracing.com/et-hp-mph.php

http://www.wallaceracing.com/gear-speed.php

OxTheGreat

The closest "real" track is 1/8th, royal purple is 1/4. So most of my racing will be 1/8

OxTheGreat

Best calculators ive seen yet

Forcefed86

iTrader: (4)

You really don’t want a 3.25 gear in it for 1/8th. If you don’t plan on street driving it then you’d want a 4.40-4.60 range gear. It’s going to be a traction battle in the 1/8th.

Here’s the 1/8th calc.

http://www.wallaceracing.com/et-hp-mph-8th.php

http://www.ebay.com/itm/Ford-9-ring-...RXtiga&vxp=mtr

OxTheGreat

4.40-4.60 seems really high (low). Plus like you said, its going to be a battle hooking with that kind of gears and power. Maybe ill start with 3.70 and once i learn to effectively run those look at building something more aggressive to cut 60ft

MY_2K_Z

iTrader: (1)

I assume you will be running at hmp