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Search: Posts Made By: GTA matt
Showing results 1 to 50 of 497
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Forum: Suspension and Chassis
05-02-2024, 12:27 PM
Replies: 10
Views: 12,170
Posted By GTA matt

Re: competition engineering subframe connectors any good?

I've put these connectors on both of my cars. One was a stock height drag car with long tubes where I ran the exhaust around the factory subframe and trans mount, unaffected by the connectors. The...
Forum: Tech / General Engine
04-18-2024, 06:23 PM
Replies: 113
Views: 3,441
Posted By GTA matt

Re: Whats respectable street performance in 2024?

I forgot to turn my signature off lol. I still have that car, but it’s apart right now while I figure out what I want to do with it. Ended up going an 11.85 with the original l98 bottom end, Afr...
Forum: Tech / General Engine
04-18-2024, 01:10 PM
Replies: 113
Views: 3,441
Posted By GTA matt

Re: Whats respectable street performance in 2024?

Dyno video

https://youtu.be/7wXHzKf7wTU?si=yQrtRkj8oMOELkza

build thread https://www.thirdgen.org/forums/members-camaros/756715-my-not-project-89-a.html
Forum: Tech / General Engine
04-18-2024, 12:00 PM
Replies: 113
Views: 3,441
Posted By GTA matt

Re: Whats respectable street performance in 2024?

I built my iroc with nothing but street driving in mind. It can absolutely be at home on the drag strip or on the autocross course, or on a road course for that matter. Its a twin turbo SBC, made 752...
Forum: Members Camaros
04-07-2023, 12:22 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

It did look nice in bare metal, but it would be a rusty looking mess in short order otherwise.



Yeah, It never crossed my mind to check. I have nothing exotic. A beefier rod would no doubt take...
Forum: Members Camaros
04-07-2023, 10:25 AM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

It's alive again! I really missed driving this thing, and will be going on a 400 mile trip in it next weekend. Huge thanks to Wilkins racing engines for getting me a block and doing the machine work...
Forum: LTX and LSX
03-24-2023, 11:51 AM
Replies: 14
Views: 699
Posted By GTA matt

Re: 450 Pump Install

It'll be fine at that power level. I've been making 900 (flywheel) on a single 450 with all stock lines and hanger. Hot wire of course. Don't waste the time, money, or effort on E.
Forum: Tech / General Engine
03-09-2023, 08:42 PM
Replies: 12
Views: 886
Posted By GTA matt

Re: HELP 383 Knocking

What oil pan do you have? Depending on rods and rod bolts, they can touch the stock oil pan where in turns in slightly near the oil filter. Makes a nice little knocking sound.
Forum: Members Camaros
01-15-2023, 10:37 AM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Well, it came unglued in the middle of a 4th gear pull one freezing cold night. The timing chain broke. Still not sure why. After taking it apart, there is no visible cause. I was certain, before...
Forum: Alternative Port EFI Intakes
11-29-2022, 06:50 AM
Replies: 6
Views: 1,256
Posted By GTA matt

Re: Twin Turbo Miniram dyno results

Do it! I have zero regrets. Only thing I would change would be a Holley instead of fitech, but the terminator wasn't our when I originally built it.



I believe so. I had emailed eagle before i...
Forum: Tech / General Engine
11-24-2022, 08:49 AM
Replies: 2
Views: 319
Posted By GTA matt

Re: Aftermarket serpentine belt drive system ??

Running the Eddie motorsports 6 rib S drive setup on mine. Nice and compact, low in the middle for air intake clearance.
...
Forum: Members Camaros
10-31-2022, 07:46 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

The clutch is the concept 10.5. Drives just like stock. No chatter, no harsh engagement, pedal feel is perfect, not stiff at all. I can hold the clutch pedal down at a light for any amount of time....
Forum: Alternative Port EFI Intakes
10-30-2022, 03:21 PM
Replies: 6
Views: 1,256
Posted By GTA matt

Twin Turbo Miniram dyno results

I've been driving this setup for the past 18 months, 10,000 miles, and finally got it dyno'd. My intention was never to chase any number in particular, just have a reliable, drive anywhere street...
Forum: Members Camaros
10-30-2022, 02:41 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Uploaded a short dyno video
https://youtu.be/7wXHzKf7wTU
Forum: Members Camaros
10-16-2022, 12:04 AM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Finally dyno'd this thing, went to a local shop that was having a dyno day, so no tuning was involved. Was EXTREMELY pleased with the number it laid down, 752 hp, on a dyno that had been breaking...
Forum: Members Camaros
07-03-2022, 11:24 AM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Haven't updated in a while, I've just been driving the car, going to some shows and events. Its been completely problem free and still a blast to drive.

Some pictures from the Charlotte autofair...
Forum: Exhaust
01-09-2022, 09:51 PM
Replies: 170
Views: 13,234
Posted By GTA matt

Re: Headers and exhaust options for 700 hp street car

This is how I discovered how restrictive the spintech single in, dual outlet muffler really was. I had to add a significant amount of fuel to the tune above 5500 when I put the straight through...
Forum: Exhaust
01-01-2022, 12:29 PM
Replies: 170
Views: 13,234
Posted By GTA matt

Re: Headers and exhaust options for 700 hp street car

The single vibrant is pretty loud out the back in an NA setup. Inside the car is pretty tame.
Forum: Exhaust
01-01-2022, 10:37 AM
Replies: 170
Views: 13,234
Posted By GTA matt

Re: Headers and exhaust options for 700 hp street car

For the simplicity and money savings of keeping your headers, I would for sure modify them with a 3" v-band, then run a dual 3" into a single 4". Pretty much what I did with my twin turbo setup,...
Forum: Members Camaros
11-28-2021, 04:44 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Some more updates, I took the car on a 550 mile road trip a few weeks ago, where it averaged 19 mpg's. Odometer is now showing just shy of 13,000 miles. Only issue I have run into so far was...
Forum: Tech / General Engine
09-23-2021, 06:54 AM
Replies: 54
Views: 2,713
Posted By GTA matt

Re: To Use Anti-Seize on Plugs or To Not...

Sooo, that's pretty much what NOT to do....

And I'll repeat, don't put anti seize on spark plug threads. Completely unnecessary, unless you have an iron headed plow truck you plan on doing zero...
Forum: Tech / General Engine
09-21-2021, 10:47 PM
Replies: 54
Views: 2,713
Posted By GTA matt

Re: To Use Anti-Seize on Plugs or To Not...

Not once, not ever, zero need, completely unnecessary, zero pro's, many con's.
Forum: Members Camaros
07-09-2021, 05:54 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Thanks! The gauges are Dakota Digital VHX.
Forum: Members Camaros
07-09-2021, 05:00 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I'm still just driving this thing. It runs so well, perfectly mannered and really a pleasure to drive. Odometer clicked past 10,000 miles last week, and keep in mind I didn't install that gauge...
Forum: Auto Detailing and Appearance
05-24-2021, 11:24 AM
Replies: 7
Views: 1,523
Posted By GTA matt

Re: June 2021 COTM "Open Season" **Voting Thread**

Thank you for the nomination, it really means a lot. I've owned this 89 IROC for nearly 3 years now, after purchasing it on a whim surfing craigslist. It was a basically stock 305/t5 combo when I...
Forum: Members Camaros
05-16-2021, 10:06 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I have been driving this thing. A lot. And loving every minute of it. Well over 500 miles on it in the past 2 weeks, including a semi-spirited 100 mile trip today that was all windy back roads, where...
Forum: Members Camaros
05-09-2021, 09:37 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I replaced the throttle body gasket today and weighed this tank. It's up 99 pounds, from 3509. Not surprising, between the turbos, intercooler and all the piping, it adds up quickly.
...
Forum: Members Camaros
05-08-2021, 10:52 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I've been putting some miles on this thing for the past week, it is an absolute joy to drive around. Honestly couldn't be happier with the cars performance. Well mannered and the power far exceeded...
Forum: Auto Detailing and Appearance
05-01-2021, 01:10 PM
Replies: 94
Views: 4,411
Posted By GTA matt

Re: SPRING is coming! Let's see some of these Third gens after hibernation.

Thank you! It's been a long build but I can finally say it's done-ish.
Forum: Auto Detailing and Appearance
05-01-2021, 12:58 AM
Replies: 94
Views: 4,411
Posted By GTA matt

Re: SPRING is coming! Let's see some of these Third gens after hibernation.

First bath in 356 days...

https://hosting.photobucket.com/images/y29/gtamatt/20210424_115843.jpg?width=960&height=720&fit=bounds...
Forum: Members Camaros
04-28-2021, 09:44 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Brakes are bled, finally got to drive it down the road! Still needs some work, and I need to make a few changes, but overall, extremely pleased!. Turbos spool almost immediately. Wastegates open at...
Forum: Exhaust
04-27-2021, 06:52 AM
Replies: 11
Views: 2,907
Posted By GTA matt

Re: Catalytic converters with larger cams

I'd suggest tuning it leaner at idle. Something like 15.3-15.4 to start. You'll also notice a sharp change in smell if you go too lean. With larger cams, the a/f sensor is getting a blast of fresh...
Forum: Members Camaros
04-26-2021, 09:08 AM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

The turbos are meant to be water cooled, and although many don't utilize this feature, I plan on putting some miles on them, and I've seen turbos fail in my euro repair world from cooling system...
Forum: Members Camaros
04-26-2021, 09:06 AM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

The car is alive and running well. Still got some things to button up of course, but I was able to do some driveway pulls and start tuning it. Turbos come on surprisingly quick, at 37% throttle and...
Forum: Cooling
03-16-2021, 09:47 PM
Replies: 3
Views: 1,022
Posted By GTA matt

Re: Derale fans

Dewitts radiator, derale shroud. With stock accessories, you'll have plenty of room. I'm using an aftermarket serpentine setup, and it's tight. I set the shroud up so I can slide it right out the top...
Forum: Tech / General Engine
03-09-2021, 05:53 PM
Replies: 4
Views: 660
Posted By GTA matt

Re: AFR 195, what PN for L98 and Dyno Don Headers

If you are running 1040's, with Don's headers, you will absolutely need a stubby spark plug socket. Plug changes are easy, there's just no room for a regular sockets.

Also, get Remflex 2017 header...
Forum: Members Camaros
02-09-2021, 10:09 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Exhaust is finally 100% done, made up one final hanger after the y-pipe, bolted to the subframe connector. Also rolled it out of the garage to relocate the fuel lines I've been putting off for 2...
Forum: Power Adders
01-31-2021, 10:59 AM
Replies: 7
Views: 1,296
Posted By GTA matt

Re: Adding twins to a perfectly good NA engine

They're Eddie Motorsports S drive
Forum: Power Adders
01-30-2021, 01:53 PM
Replies: 7
Views: 1,296
Posted By GTA matt

Re: Adding twins to a perfectly good NA engine

Brackets were made out of simple sheet metal, with nuts welded on, some in multiple pieces, again to aid in disassembly and reassembly. Multiple pieces can be removed, and everything else remains...
Forum: Power Adders
01-30-2021, 01:51 PM
Replies: 7
Views: 1,296
Posted By GTA matt

Re: Adding twins to a perfectly good NA engine

On to some exhaust fab. Learning how to weld stainless as I go. I had made a muffler delete out of stainless in the spring, it turned out ok-ish, but the more I practice, I feel the better I have...
Forum: Power Adders
01-30-2021, 01:50 PM
Replies: 7
Views: 1,296
Posted By GTA matt

Re: Adding twins to a perfectly good NA engine

Realized I never updated this. Between work, life and other projects this summer, I really feel like I haven't accomplished a ton of progress, but in reality, I have many, many hours into it. From...
Forum: Members Camaros
01-24-2021, 10:49 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I may have gotten carried away with the exhaust... I got the hangers all welded up and the downpipes completely wrapped, everything turned out great there. I began building the exhaust from the...
Forum: Members Camaros
01-18-2021, 10:07 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Spent a couple more minutes on it in the last few days, making support brackets for the downpipes. Made standoffs coming off of each cylinder head, to hopefully take some of the turbo weight off of...
Forum: Members Camaros
01-18-2021, 09:59 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

It follows the same routing as the factory exhaust. Best solution for running a full exhaust on this thing, you've seen how low this thing sits lol. My dyno don's setup vs. what I built. Don's was...
Forum: Members Camaros
01-16-2021, 08:08 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I feel like this exhaust is taking waaaaay longer than it should, but its turning out pretty half decent. Finished up the rest of the passenger side downpipe and started working on the y-pipe. I had...
Forum: Members Camaros
01-02-2021, 09:20 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

Loooong overdue update. Between work, life, side jobs, and working on a 4th gen I bought, I really haven't got a chance to get back on this thing until recently, but I've been hitting it pretty hard...
Forum: Tech / General Engine
11-27-2020, 03:42 PM
Replies: 8
Views: 749
Posted By GTA matt

Re: need some cam help/advice for SR 383

Should run great. I have the xfi292 in a manual trans 383 and don't hesitate to drive it anywhere. Zero adverse affects. The 280 should be a great match to your combo.
Forum: Transmissions and Drivetrain
10-06-2020, 07:11 PM
Replies: 10
Views: 5,209
Posted By GTA matt

Re: 10 bolt 7.5" Backlash

Though most times we install the carrier by feel, the technically correct way is to take the rotating torque of the entire assembly (minus axles), and subtract your pinion bearing preload from this,...
Forum: Tech / General Engine
09-29-2020, 07:14 PM
Replies: 28
Views: 2,001
Posted By GTA matt

Re: not what i expected 383 AFR

Might cost a little more, but unless you can accurately measure the cam that is in there, I'd stick a cam in it that actually will deliver the numbers you are looking for. I'd also pull a head and...
Forum: Members Camaros
08-23-2020, 10:54 PM
Replies: 139
Views: 16,304
Posted By GTA matt

Re: My 'not a project' 89 IROC build

I've been slacking on the updates, although from the outside looking in, it probably doesn't appear that I've accomplished much. This latest chapter has taken longer then intended, but I realize it's...
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