V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

3900 IROC-Z28 buildup.

Old 07-29-2013, 04:20 PM
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Re: 3900 IROC-Z28 buildup.


Finally a vid. quality isn't the best, but it gives you an idea. 7.1
Old 07-29-2013, 04:26 PM
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Re: 3900 IROC-Z28 buildup.

YEAH! It moves for sure.


That blazer makes alot of racket tho

wonder what kind of power you are making....

http://www.angelfire.com/my/fan/WHPCalculator.htm

Last edited by 34blazer; 07-29-2013 at 04:32 PM.
Old 07-29-2013, 06:18 PM
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Re: 3900 IROC-Z28 buildup.

That Car moves. Props as always!
Old 08-01-2013, 11:56 AM
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Re: 3900 IROC-Z28 buildup.

There's the video. Good work!
Old 09-08-2013, 09:05 PM
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Re: 3900 IROC-Z28 buildup.

I got another new PB, it's only 1/8 mile but I was SUPER IMPRESSED.

Got lots of footage of the car that I will post soon hopefully...

But, 6.81 @ 106 MPH with a 1.69 sixty foot.



So, that is a mid 10 second pass. Running the full 1/4 on the 22nd this month. Will have tons of video of the 10 sec pass.

15 psi
Old 09-09-2013, 05:05 AM
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Re: 3900 IROC-Z28 buildup.

Nice. Congrats!
Old 09-09-2013, 05:52 PM
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Re: 3900 IROC-Z28 buildup.

http://www.youtube.com/watch?v=D9kcP...ature=youtu.be
Old 09-09-2013, 06:12 PM
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Re: 3900 IROC-Z28 buildup.

Niiiiiiice!

Man that thing is quick!
Old 09-09-2013, 09:03 PM
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Re: 3900 IROC-Z28 buildup.

Nice!
Old 01-13-2014, 10:20 PM
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Re: 3900 IROC-Z28 buildup.

In for updates! Vids! MPG?! What's it weigh? Carnage?! Ths snow is making me antsy to drive a Camaro... S this HP tuned or mega squirted?
Old 01-13-2014, 11:03 PM
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Re: 3900 IROC-Z28 buildup.

So the 10 second run WON'T happen this year... best is still 6.81 @ 106 (converts to a mid 10)

Last race, I went out to the track for the CSCS season ender... Then "race day" Sunday, they opened the track up but 1/8 mile only.

We usually run a 11.50 index heads up pro-tree class, but due to water at the top end of the track, they ran us 1/8 mile on a 7.33 index.

Vids :




This is a vid of just a burnout, at the end... haha I was pretty proud of this one, just started it in second gear and let her rip.. haha



I dialed her in tight to run 7.40 (about 6-6.5 psi) and ended up taking it.

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MOO HA HA HA

So that is all for the year, I have a STACK of timeslips with the 3900, I mean about 8 race weekends, so likely over 100 passes on the thing. Ultra reliable !

Overall impressed with this engine !

Going to stabilize the gas, change the oil, wax the car and store it in the race car trailer till spring. Was a great year.

Might take it out early in the spring, take off all my hotside and get it ceramic coated. OR just wrap it all.

Put the battery back in and go racin !!
Old 01-13-2014, 11:07 PM
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Re: 3900 IROC-Z28 buildup.

As far as your questions, I have no idea on the MPG, but I can tell you it's VERY good on gas. For sure in the 20's. MPG TH350 with a 3.45 gear is hurting, I should have kept the stock 3.27 gear.

Absolutely no carnage at all, I usually run it at 4 psi (7.5 - 7.6) in the 1/8 mile for my local braket racing series.

it is running a 7730 ECM out of a 91 cavalier V6 tuned with code59.org
Old 01-13-2014, 11:34 PM
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Re: 3900 IROC-Z28 buildup.

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Got these made up, haha.

clever, no ?
Old 01-13-2014, 11:46 PM
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Re: 3900 IROC-Z28 buildup.

haha, nice use of the turbo 6 insignia!

I have a question, still running into rolling idle issues?
Old 01-14-2014, 06:05 AM
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Re: 3900 IROC-Z28 buildup.

Amazing as always. I still cant believe that u can make 7.xx 1/8 mile passes with such little boost. Definitly inspires me to finish my build up soon.
Old 01-14-2014, 01:42 PM
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Re: 3900 IROC-Z28 buildup.

Thanks! Great results, you'll get that 10! This is still pumpgas?
Old 01-14-2014, 04:12 PM
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There's a guy on V6Z24 who hit 10s last year with a 3500 so it's definitely doable. Id like my car to get that far but I really need to sort out my gearing first.
Old 01-15-2014, 04:25 PM
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Re: 3900 IROC-Z28 buildup.

Yeah 91 octane with meth.
Old 01-15-2014, 08:20 PM
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Re: 3900 IROC-Z28 buildup.

Definitely following this thread, awesome times for a v6!
Old 04-09-2014, 03:33 PM
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Re: 3900 IROC-Z28 buildup.

Do to a few surgeries, I can't do a change like this myself. But damb if money was no object....I'd do this over a ls3 swap.
Old 04-09-2014, 04:22 PM
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Re: 3900 IROC-Z28 buildup.

Very Nice!!
Old 08-10-2014, 07:22 PM
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Re: 3900 IROC-Z28 buildup.

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Got a 10 sec pass... finally.

LZ9 3900 WOT cam, PAC springs, GT4088, 15 psi.
Old 08-10-2014, 07:23 PM
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Re: 3900 IROC-Z28 buildup.

vid to come.
Old 08-10-2014, 08:00 PM
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Originally Posted by mars061

Got a 10 sec pass... finally.

LZ9 3900 WOT cam, PAC springs, GT4088, 15 psi.
Wow! Awesome man! Can't wait to see this thing run 9s
Old 08-11-2014, 12:10 AM
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Re: 3900 IROC-Z28 buildup.

HOLY S#!T!!!

Awesome man, just awesome.

Also you never replied to my PM on 60 degree.
Old 08-11-2014, 01:23 AM
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Re: 3900 IROC-Z28 buildup.

Holy F***
Old 08-11-2014, 05:46 AM
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Re: 3900 IROC-Z28 buildup.

Beautiful. Nice job can't wait to see a vid.

Boost level? Any starting line enhancements or just foot braking?

Last edited by fasteddi; 08-11-2014 at 05:55 AM.
Old 08-11-2014, 08:57 PM
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Re: 3900 IROC-Z28 buildup.


foot brake.

15 psi.

no trans brake. Pretty much a stock LZ9 with a cam and springs.

Last edited by mars061; 07-28-2015 at 08:22 AM.
Old 08-12-2014, 01:16 AM
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Re: 3900 IROC-Z28 buildup.

Seems lazy out of the hole, and it still ran a mid 10?

I knew I should have got an LZ9 instead of my LX9...

Oh well, next time. lol
Old 08-12-2014, 04:39 PM
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Re: 3900 IROC-Z28 buildup.

That is awsome. Just sweet. Congrats man. Love the vid.
Old 08-12-2014, 05:26 PM
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Originally Posted by mars061
Video Link: http://www.youtube.com/watch?v=uUgIcavXeZ8

I am using a 2 step and foot brake.

15 psi.

no trans brake. Pretty much a stock LZ9 with a cam and springs.
That's ridiculous, makes me want to skip the hybrid swap altogether and just grab the 3900. I don't remember reading it in the thread but did you use the engine with or without VVT?

Can't really tell from the video but it looks like you gave that bike a damn good race. Good job man!
Old 08-13-2014, 09:47 AM
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Re: 3900 IROC-Z28 buildup.

Originally Posted by willexoIX
That's ridiculous, makes me want to skip the hybrid swap altogether and just grab the 3900. I don't remember reading it in the thread but did you use the engine with or without VVT?

Can't really tell from the video but it looks like you gave that bike a damn good race. Good job man!
Im considering an LZ9 as a swap for the GN, throw the LC2 in storage for later.
Old 08-13-2014, 11:09 AM
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Re: 3900 IROC-Z28 buildup.

VVT is gone. Running a 3500 cam/cam gear. with the Street Strip boost cam WOT TECH.
Old 08-13-2014, 12:47 PM
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Re: 3900 IROC-Z28 buildup.

Your 1/8th mile trap is 117, takes about 750-RWHP to trap that speed in the 1/8th with a 3200 pound car. Your pushing that much horsepower at only 15-psi?

Edit: My bad, not used to those elaborate timeslips that quote the 1000 foot too lol. Picking up that much mph from 1/8th to 1/4 is very impressive, congrats...

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Old 09-01-2014, 05:23 AM
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Re: 3900 IROC-Z28 buildup.

Congrats on your 10 second run you inspire all of us turbo 660 owners. It's amazing that stock bottom can handle that much power.
Old 09-09-2014, 10:06 PM
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Re: 3900 IROC-Z28 buildup.

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car is running great...

won 200$ quarter final last weekend in no box and 100$ for this 11.90 index class last weekend.

weekend before that made it to the final in no box and lost on a .010 redlight, another 300$.

car is making me some cash and running consistent. quite happy.
Old 09-10-2014, 10:57 AM
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Re: 3900 IROC-Z28 buildup.

Nice work!


Now bring that thing down to Iowa for the V6z24 bash in a few weeks.
Old 09-10-2014, 01:24 PM
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Re: 3900 IROC-Z28 buildup.

How many spare engines have you bought with the winnings?
Old 01-31-2015, 09:07 PM
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Re: 3900 IROC-Z28 buildup.

so this happened a little bit before Haloween last yr, I had just changed the oil, and took it for one last drive to work before I store it for winter, the road was dry, but it still got away on me. Light up the tires around 55MPH and she started to go slideways, I just couldn't save it.

Didn't get hurt at all, was wearing belt.

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As you can see I crushed the roof in, and smashed most of the windows... NO DAMAGE at all to the drivetrain, intercooler, nothing. I still drove the car around my yard with the damage, drove mint. haha

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And of course, the new shell, 100 000 mi. on it, ULTRA clean. Original TBI 305 solid roof coupe. manual windows. The engine is already pulled and the 3900 will be going in very soon. I will be putting in a 6pt. bar before the spring.
Old 01-31-2015, 09:16 PM
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Re: 3900 IROC-Z28 buildup.

Wow man. Well I'm glad you made it out ok. I always look forward to seeing your builds.

Your the bar that I chase we it comes to being faster each season.
Old 01-31-2015, 09:19 PM
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Re: 3900 IROC-Z28 buildup.

chop top near windshield, cut off the rear section, drop in a 305 for a sunday cruiser with no roof

I also shortend the wheel base but you don't have too.

http://thirdgenchat.org/z28ster/

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Old 01-31-2015, 11:14 PM
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Re: 3900 IROC-Z28 buildup.

Damn man!

Glad to hear you are ok.

Amazing how little damage there is, considering it went shiny side down.
Old 02-01-2015, 12:23 AM
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Re: 3900 IROC-Z28 buildup.

Damn, it looks worse than what it actually was if you walked away from that. Been wondering why we haven't seen an update in awhile. Looking forward to more updates
Old 02-01-2015, 05:36 AM
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Car: 94 Camaro
Engine: 3.5 turbo
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Axle/Gears: Strange rear, 3.42
Re: 3900 IROC-Z28 buildup.

Glad your OK. Almost lost mine recently on an icy patch of road, amazing how fast it happens.
Old 02-01-2015, 09:08 AM
  #95  
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 3900 IROC-Z28 buildup.

ouch man glad ur ok , noone ever relizes how fast things happen till they have a close call or worse. new car looks pretty nice
Old 02-01-2015, 01:00 PM
  #96  
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Car: 2006 Cobalt SS/SC
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Axle/Gears: 4.05
Re: 3900 IROC-Z28 buildup.

I'm glad you walked away from that one, man.

Words can not express my sadness and condolences at your loss.

I hope the new car treats you just as well, and that faster times are in your future.
Old 02-01-2015, 02:46 PM
  #97  
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Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Re: 3900 IROC-Z28 buildup.

I'm thinking it's a good thing that the new car is not black. The last two black cars you've had have met unkindly demises...
Old 02-03-2015, 02:38 PM
  #98  
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
Hey Mars, what did you pay for the lz9 engine?

Sucks that it wrecked but glad you walked away alive. Could have been much worse.
Old 02-04-2015, 10:48 PM
  #99  
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Car: 87 IROCZ Z28
Engine: 3900V6 GT4088 intecooled
Transmission: TH350
Axle/Gears: 3.45 MSF Spool
Re: 3900 IROC-Z28 buildup.

the 3900 was bought for 250$ with around 50,000 mi

cheapest ls1 I could find was almost ten times as much...
Old 02-05-2015, 10:20 AM
  #100  
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Re: 3900 IROC-Z28 buildup.

Street Radials on a 10 second car is insane!

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