Re: 88gt/5.3/zr1cam/s475/th400wTB/ 530rwhp 705ftlbs 7-26-12

She held pretty good!

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

what a awesome day today haha

we have this TBI 350 powered flatbed towtruck, and the motor was fuckin tired, as you might have seen in the last video hahah

anyway we just happened to have a 454 big block carbed motor sitting in the driveway, yes, in the driveway... so obrien racing LLC decided to install the big block in the towtruck, they slammed it in there super fast, and we put a regulator on the fuel feed and return and got the pressure down to 9psi for the stock quadrajet and got it fired etc, everything is great otehr than having to hotwire the pump to run when the key is on since we are really not using any of the tbi electronics.

so my buddy wires it up no fuse or nothing but does use a relay, well half way to the track, on a bridge... the wires melt lolol

so we used a jumper cable to power it enough to pull off the bridge, and we were following him in another car, so went to auto zone and got the wire and a fuse holder and wired it up and finished our trip to the dragstrip.

first pass in the car we decided why not footbrake nice and see how she does.

10.55 @ 133mph 1.7x 60ft 107 in the 8th. awesome, we are super pleased with this, considering we can turn up the boost a little and even spray it with nitrous if we really want to hahah.

the next two passes were off the trans brake but although they look great because of the squat you can also see the car fishtailing and spinning 1.8 60 and going 10.60 and 10.71 i think, ill be cutting and uploading the video shortly.

but i figured you would all enjoy the sloppy story.

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

he also knocked the rear view mirror off the car on the launch lol

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

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Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

Nice runs! Get a chance to weigh it there? Think it's driving through the converter?

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

Sweet!!

Just awesome whats being done with these motors..

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

havent weighed it yet, but i am assuming its 3200 or so with him in it

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

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22lbs of boost, ls6 intake

it picked up 40whp from the truck to ls6 intake.

the rest was PSI's!

 

if it sounds like it hiccups its because it does, no other tuning other than WOT haha its really fat in the mid range

 

Re: 88gt/5.3/zr1cam/s475/th400/ 530rwhp 705ftlbs / 10.55 @ 133 8-12-12

Mine was 3350 with me in it and the turbo kit + 1/2 tank of gas. Weld wheels and cage installed. No back seat etc...

 

Are the RPM's next to those HP numbers on the dyno correct? Peak power at like 4600-4800 (can't read it) and peak torque at 4k? Seems like that has to be wrong.

What are you reving it out to? When does the power drop off?

 

nope there isnt a rpm pickup on the car so the RPM portion is skewed, we did the calibration for 3k in 3rd gear but with a unlocked stall it is off a little, ide say they are 1000-+ off

 

9.82@139 today

 

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That's getting her done. What did the rest of the slip look like? What were the changes to go from the 10.55 to the 9.82? Just the intake and a couple of psi. My junk ran a 10.50 on 9psi just wondering what I'm going to have to do to get into the 9's.

 

Adjustable shocks front and back

 

The gauge overlay is awesome!

 

Why did you take the 4.8 out i didn't reed anywhere that it was hurt? Then i see a 5.3 went in just wondering

 

i pushed timing till i broke a piston, and then when i swapped in a new to me, barrel of used pistons in, i screwed up the damn oil pump o-ring and washed all the bearings driving to the track, running low 10s, and driving home motor hammering lol so then i just threw the damn 5.3 in

 

I know this thread is old, but I have to ask. Without an accurate rpm, how are you calculating hp? 1000rpm could easily be 100hp difference.