ZZ3 Turbo Iroc - Round Three
03-11-2014, 09:23 PM
#651
Re: ZZ3 Turbo Iroc - Round Three
Turbo helps to a degree but a good boosted motor is one that is a good na motor to begin with. Intake and cam have more of an effect than turbo alone. Just because density increased doesnt mean the physics of air flow and induction change. I believe they still have a role, as pressure ratios across port and chamber remain similar to na just at higher static pressures than na, but the exhaust side doesnt play as much of a factor with scavenging like it does in a na build. Case in point i ran same turbos on my 401 shortblock with same intake. Only differences were cam heads and slightly smaller turbine a/r but i was only 650-700 whp range so it wasnt much of a restriction.
Small cam small head spooled sooner but stopped pulling by 5500. It was falling off by 5800. New large head and cam setup goes to 7200 plus. Cam and heads still dictate alot of the power curve shape. Turbo can make it hang on longer than it would in na sometimes but the shape is still influenced by heads cam and induction. IMO
But thats a different issue and not necessarily a problem in this build for the goals desires but still could show some improvement so it was brought up
Small cam small head spooled sooner but stopped pulling by 5500. It was falling off by 5800. New large head and cam setup goes to 7200 plus. Cam and heads still dictate alot of the power curve shape. Turbo can make it hang on longer than it would in na sometimes but the shape is still influenced by heads cam and induction. IMO
But thats a different issue and not necessarily a problem in this build for the goals desires but still could show some improvement so it was brought up
03-11-2014, 09:30 PM
#652
Re: ZZ3 Turbo Iroc - Round Three
not sure why the 9 bolt brakes wont work, but they are specifically listed as not working on the moser, and the 10 bolt brakes work. (along with ls1/lt1)
my 9 bolt doesnt have pbr brakes on it. (i dont think?)
this info is for the moser rear, btw.
i would bet a strange 12 bolt could work with any of them. mine had small axle tubes barely larger than the stock 10 bolt.
my 9 bolt doesnt have pbr brakes on it. (i dont think?)
this info is for the moser rear, btw.
i would bet a strange 12 bolt could work with any of them. mine had small axle tubes barely larger than the stock 10 bolt.
My strange 12 bolt has 98-02 ls1 brakes but has the ford 9" style housing ends. No c clips no c clip elimins either
03-11-2014, 09:32 PM
#653
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Car: 86 trans am
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Re: ZZ3 Turbo Iroc - Round Three
How is your 12 bolt holding up compared to a 9in? Are you runnin a spool or a locker?
03-11-2014, 09:53 PM
#654
Re: ZZ3 Turbo Iroc - Round Three
No major stress applied yet so i dont know yet. Its 33 splined and has a detroit true trac in it. Few lazy launch 10 second passes, some street miles and 20 dyno runs peaking 1000+ hp. That dont mean much tho. Real test is at the track. Transbrake should make it interesting. Everyone told me the true track wont live but i think it will support my goals of 1.4 60's and occassionally a 1.3 blast hopefully. Ten bolt survived 1.40's so why cant a 8.875"?
03-15-2014, 10:16 PM
#655
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Re: ZZ3 Turbo Iroc - Round Three
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03-16-2014, 02:17 AM
#656
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Re: ZZ3 Turbo Iroc - Round Three
I say go for it man the car seems pretty good now except for the fueling problems but the car seems pretty drivable in the current condition
03-19-2014, 07:24 AM
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Car: 87 Iroc
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Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
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03-24-2014, 10:34 PM
#659
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03-25-2014, 02:28 AM
#660
Re: ZZ3 Turbo Iroc - Round Three
Should look into other options while your at it. Example, ECS (East Coast Supercharging) has a special out right now, the package is for the 2014 Corvette, for $6500.00 you get American headers, Novi Super Charger, and a complete dyno tune guaranteeing 10's in the 1/4 mile before it leaves the shop (at moderate boost levels), with warranty. GTR's are sweet, I had one, but the insurance and maintenance were a killer...
03-25-2014, 07:39 AM
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Re: ZZ3 Turbo Iroc - Round Three
I know I said I wouldn't but I'm going to look at a used (2009) GT-R. It is local and looks clean, but best of all it is about half the price of new. This would free up enough money to spring for the Alpha 7 (700 crank hp) kit immediately and get the trans built for 800 ft lbs, while still leaving 30k on the table to keep the Iroc going and modding as time allows. Whether or not I do this depends on a number of things going on in my life right now. The house is on the market finally. First lookers coming in the morning. Would be nice for a quick offer and contract, but my real estate agent says don't get too excited this early. Assuming the house does sell, I have the issue of a single lane drive way and a one car carport this this rental. Having three vehicles would be difficult without a two car garage. That would be two hotrods to wash for the weekend. In some ways I'd be more likely to do this if I don't sell the house, as I have that nice big garage to keep them in. Just seeing where the wind will take me for now..
Last few times I've driven the Iroc makes me want to hang on to it. No other car I can buy is going to match the sound of this thing without some major changes.
Last few times I've driven the Iroc makes me want to hang on to it. No other car I can buy is going to match the sound of this thing without some major changes.
AND keep the IROC?! WOOOOOT!
03-25-2014, 09:13 AM
#662
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Re: ZZ3 Turbo Iroc - Round Three
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03-25-2014, 10:13 AM
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Re: ZZ3 Turbo Iroc - Round Three
I personally am a hater of the GTR...not that I don't like the car...its just that it can show up so much for so little mod wise....hell a tune only gtr can run 10s
http://tothefloor.com/10-second-gt-r...ile-drag-race/
My whole third gen with all time and effort and say its perfect could only fetch what.....what a exhaust system costs? Damn. Damn that.
That that right there is why Im a hater.......but I love it
http://tothefloor.com/10-second-gt-r...ile-drag-race/
My whole third gen with all time and effort and say its perfect could only fetch what.....what a exhaust system costs? Damn. Damn that.
That that right there is why Im a hater.......but I love it
03-29-2014, 11:31 PM
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Car: 87 Iroc
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Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
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03-30-2014, 09:22 AM
#666
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Re: ZZ3 Turbo Iroc - Round Three
NICE!
In for new vids, track times and MORE B@@ST!
In for new vids, track times and MORE B@@ST!
03-30-2014, 11:31 AM
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Car: 87 Iroc
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03-30-2014, 12:08 PM
#670
Re: ZZ3 Turbo Iroc - Round Three
Originally Posted by ZZ3Astro
I'm disappointed in this PTC converter still now that I see the flash is 5000 rpm...
03-30-2014, 12:37 PM
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Re: ZZ3 Turbo Iroc - Round Three
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03-30-2014, 01:33 PM
#672
Re: ZZ3 Turbo Iroc - Round Three
Remember though Steve, flash stall is never set in stone, the same converter will essentially change its' flash point depending on your individual power curve . Your turbo wants to scream during mid-high level RPM, that's not the best situation for stock TPI runners. By going with a smaller exhaust housing in the turbo, power will come in much sooner, and this will effect your flash stall and put it where you want it. Either that, or stick with what you have and open up the intake manifold and/or swap to a stealth ram, tune your VE up top, and pull higher 6000+RPM's. Just some food for thought...
03-30-2014, 03:18 PM
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Car: 1991 firebird
Engine: TBI 305 (built)
Transmission: T5
Axle/Gears: 4.10
Drove the Iroc up to a little get together in Alabama and they had a dyno so I had to... and she broke the 500/500 barrier finally! No wonder parts are breaking:
Video Link: http://youtu.be/HobUCEpMx6U
and then the good run..
Video Link: http://youtu.be/l_EBh4ZFJcE
Video Link: http://youtu.be/HobUCEpMx6U
and then the good run..
Video Link: http://youtu.be/l_EBh4ZFJcE
91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!
03-30-2014, 06:10 PM
#676
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Re: ZZ3 Turbo Iroc - Round Three
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03-30-2014, 06:12 PM
#677
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Re: ZZ3 Turbo Iroc - Round Three
^^^ BOOOOO!
03-30-2014, 08:12 PM
#678
Re: ZZ3 Turbo Iroc - Round Three
I'm just surprised you cant get a converter to stall up under that torque load under 4000 rpm
I had a 700r4 converter from edge not stall any higher than 3800 rpm on a 150 shot 383 that was around 550wtq 500 whp. Guess from 3450lbs and 128 traps.
Now PTC over shot my first converter for the turbo car but hit the nail on the head the second time around. My stuff will flash low on initial hit but if load is sufficient and in the right gear, boost rise is rapid and it will flash the converter again about 800 more rpms. First hit seems to be 3800-4000 but fast boost rise and power onset jumps to 4500-4800 it seems. So maybe that second flash is what you are seeing?
I had a 700r4 converter from edge not stall any higher than 3800 rpm on a 150 shot 383 that was around 550wtq 500 whp. Guess from 3450lbs and 128 traps.
Now PTC over shot my first converter for the turbo car but hit the nail on the head the second time around. My stuff will flash low on initial hit but if load is sufficient and in the right gear, boost rise is rapid and it will flash the converter again about 800 more rpms. First hit seems to be 3800-4000 but fast boost rise and power onset jumps to 4500-4800 it seems. So maybe that second flash is what you are seeing?
03-30-2014, 08:28 PM
#679
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Car: 1991 firebird
Engine: TBI 305 (built)
Transmission: T5
Axle/Gears: 4.10
PTC is about 15 min from my house I worked there about 3 years ... call n ask to talk to Kenny ford he is the owner he will make it right
91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!
91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!
03-31-2014, 12:41 AM
#680
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Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
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03-31-2014, 02:18 AM
#681
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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: ZZ3 Turbo Iroc - Round Three
u need to talk to marty about a converter , his car is a great example of well matched parts on a turbo tpi
03-31-2014, 05:14 PM
#682
Re: ZZ3 Turbo Iroc - Round Three
Originally Posted by project89
u need to talk to marty about a converter , his car is a great example of well matched parts on a turbo tpi
04-01-2014, 08:34 AM
#683
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Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
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04-01-2014, 09:02 AM
#684
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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: ZZ3 Turbo Iroc - Round Three
if i rember correctly he was using a circle d converter or something pretty damn cheap , and he swears by that brand astros stalls peed would be the same as what marty wa susing cause the engines are pretty similar both having about the same power curve
since astro needs a converter this may be a god time to get some input from marty even thought the cars arent identical but the engines are damn near close to the same
04-01-2014, 10:27 AM
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Re: ZZ3 Turbo Iroc - Round Three
I have a complete 89 BW 9 bolt with 2.77s in the garage if you are interested, has the big brakes too. I am actually looking for 3.27s. However we are probably too far away
04-01-2014, 01:17 PM
#686
Re: ZZ3 Turbo Iroc - Round Three
If ptc can't make it work I wonder if they are at the limit of the stator area from a physics stand point. By going non lockup it would probably increase the room. What about a 10 or 11 inch converter? Wanting to say marty ran some form of circle track converter but it was a t400 non l/u. More for pushing the power band up if you keep the 700.
04-01-2014, 11:40 PM
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Re: ZZ3 Turbo Iroc - Round Three
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04-02-2014, 08:16 AM
#688
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Re: ZZ3 Turbo Iroc - Round Three
Get the 4l80e and skip a new toy.
04-04-2014, 10:40 PM
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04-05-2014, 12:54 AM
#691
Re: ZZ3 Turbo Iroc - Round Three
Very nice pick up Steve! Been looking around for a TT Porsche myself now, but it's hard to pull the trigger when you know that you could buy something equally as fast for less money. I predict your Iroc-Z will be sold within the next few months, as there is really no more reason to own it now other than for the sake of posterity... 
04-05-2014, 01:00 AM
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Car: 87 Iroc
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Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
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04-06-2014, 07:20 AM
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04-06-2014, 07:34 AM
#694
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Re: ZZ3 Turbo Iroc - Round Three
Run the IROC with the hood off.
04-06-2014, 06:39 PM
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Car: 87 Iroc
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Re: ZZ3 Turbo Iroc - Round Three
New dyno numbers today... 532/554!! I think the GT-R got its feelings hurt on the ride home as well. It could not catch the Iroc on a roll haha
04-06-2014, 08:38 PM
#698
04-06-2014, 08:43 PM
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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: ZZ3 Turbo Iroc - Round Three
man i would give up the tpi and pick up another 100+ ftlbs and hp and call it good, let the car sit and just slowly build it up to hand the power as time and money permits
04-06-2014, 09:42 PM
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