CA Friendly L98 Upgrade Plan - Review and Critique Please
08-20-2019, 05:16 PM
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Car: 89 1LE IROC Z28
Engine: 364 Ci Ls2
Transmission: Mn12 T56
Axle/Gears: Borg Warner 9 Bolt With 3.70 Gears
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
I have a set of fully ported and polished 113 heads that would have been good for this build.
08-21-2019, 01:37 AM
#52
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - In Progress
Making progress. Almost in the home stretch.
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Kevin91Z (08-24-2019)
08-22-2019, 08:45 PM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Cut the stock N10 pipe out before the cats. Only managed to cut one of the 2 air pipes (lol sorry muffler shop guy).
I only have a single cat Y for my dual cat setup so hoping I can get a fresh set of dual cat y pipes soon... or have a shop 'connect the dots' and fill in the missing part of the Y
I only have a single cat Y for my dual cat setup so hoping I can get a fresh set of dual cat y pipes soon... or have a shop 'connect the dots' and fill in the missing part of the Y
08-22-2019, 11:37 PM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - In Progress
Tight is an understatement. Got the drivers side on. It was quite a task for only being 6 bolts.
It fits, but with no room for error! Now for the.. hard side? =/
It fits, but with no room for error! Now for the.. hard side? =/
08-23-2019, 03:50 AM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - In Progress
Got the passenger side on. Had to loosen and move a hard coolant line. Otherwise, bolt-access aside, a lot smoother. Let's hope I can install the flexible oil dip stick without removing it...
Last edited by thtanner; 08-23-2019 at 03:56 AM.
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Kevin91Z (08-24-2019)
08-23-2019, 08:49 PM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - In Progress
Had to modify the ignition coil bracket for the accel / edelbrock intake manifold. Who knew? This forum, posts dated as early as 2002 mentioning it! This place is a fantastic resource.
08-23-2019, 10:53 PM
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Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Instead of modifying the the bracket, I just inverted it and mounted it to the underside of the cowl.
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thtanner (08-23-2019)
08-25-2019, 06:08 AM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - SuperRam Installed!
We got the SR installed tonight. Took the wife and I 4 hours. No special tricks, didn't need to remove rockers, etc. Long ball-end allen keys works great. We were real meticulous about the bolts; got everything snug tight then did a full tightening round.
Never thought I'd see this thing installed.
Never thought I'd see this thing installed.
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Kevin91Z (08-26-2019)
08-26-2019, 06:47 AM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
They are a great intake but a bit of a pain to install at times. Looking good!!
08-31-2019, 04:10 AM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - In Progress
Almost done. Got the SLP airbox all in, charcoal canister moved and plumbed in, throttle body, and several other things. Muffler shop tied in the dual cat setup, but I should get one ordered from Don ASAP (time is running out) as its not as nice of work as he'd have done.
ToDos include installing the heated o2, smog diverter valve or whatever it is, ac compressor (though will be disconnected until I have it charged,) button things up, add fluids, and.. hope for the best.
Hoping i eyed timing good enough on the dist. I am not sure if I'll cold start it with the ESC disconnected and try to get an initial time in before raising the rpms for a bit or just go by ear until 'break in' is done and I can idle time it at running temp.
ToDos include installing the heated o2, smog diverter valve or whatever it is, ac compressor (though will be disconnected until I have it charged,) button things up, add fluids, and.. hope for the best.
Hoping i eyed timing good enough on the dist. I am not sure if I'll cold start it with the ESC disconnected and try to get an initial time in before raising the rpms for a bit or just go by ear until 'break in' is done and I can idle time it at running temp.
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Kevin91Z (09-01-2019)
08-31-2019, 11:39 AM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Love the looks and power those make!!!
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thtanner (08-31-2019)
09-01-2019, 05:14 AM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - Ready to fire up!
Firing her up in the morning. Fingers crossed.
09-01-2019, 07:59 PM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - First Start!
First start (1500-2000rpms for cam break-in even tho its a roller)
Last edited by thtanner; 09-01-2019 at 08:56 PM.
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09-06-2019, 12:28 PM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Finally got everything kinda buttoned up right, timing is good, bad MAF diagnosed and swapped, idle set right (IAC location ~5-10) and it's doing.. ok!
Was able to datalog some and it's definitely lean, as expected with these changes. Showing 160 BLM / 140-150 INT. All at idle. Leans out as the engine warms up (again, kinda as you'd expect.)
The heated o2 helps things enter closed loop pretty darn fast.
Was able to datalog some and it's definitely lean, as expected with these changes. Showing 160 BLM / 140-150 INT. All at idle. Leans out as the engine warms up (again, kinda as you'd expect.)
The heated o2 helps things enter closed loop pretty darn fast.
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Kevin91Z (09-07-2019), Long Beach Z-28 (09-06-2019)
09-06-2019, 08:03 PM
#66
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Finally got everything kinda buttoned up right, timing is good, bad MAF diagnosed and swapped, idle set right (IAC location ~5-10) and it's doing.. ok!
Was able to datalog some and it's definitely lean, as expected with these changes. Showing 160 BLM / 140-150 INT. All at idle. Leans out as the engine warms up (again, kinda as you'd expect.)
The heated o2 helps things enter closed loop pretty darn fast.
Was able to datalog some and it's definitely lean, as expected with these changes. Showing 160 BLM / 140-150 INT. All at idle. Leans out as the engine warms up (again, kinda as you'd expect.)
The heated o2 helps things enter closed loop pretty darn fast.
09-19-2019, 01:54 PM
#67
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - Finished & Smogged!
The car passed smog today.. barely, but it did it!
Had zero issues with any of the visual stuff. I walked in with a book of EOs for every part, so that probably helped.
Had zero issues with any of the visual stuff. I walked in with a book of EOs for every part, so that probably helped.
09-28-2019, 01:35 PM
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Car: 67 ******mobile
Engine: 385 Solid roller
Transmission: T-56
Axle/Gears: 4.11
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Bring it out to Jack in the box (Florida between sanderson and kirby)Fri nights in Hemet.
the measurement you had of 535 was barely passing but it did..what was that for? nox?
the measurement you had of 535 was barely passing but it did..what was that for? nox?
09-28-2019, 10:48 PM
#69
09-29-2019, 12:40 AM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Yea, I am going to triple and quadrupedal check for any intake leaks, but haven't found any yet.
I get code 32 at cruise, but verified EGR is working and getting vacuum via gauge so... it's one of a few things. I have another thread on it here: https://www.thirdgen.org/forums/tpi/...pi-5-0-vs.html
I get code 32 at cruise, but verified EGR is working and getting vacuum via gauge so... it's one of a few things. I have another thread on it here: https://www.thirdgen.org/forums/tpi/...pi-5-0-vs.html
09-29-2019, 10:22 AM
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Car: 67 ******mobile
Engine: 385 Solid roller
Transmission: T-56
Axle/Gears: 4.11
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
does that use an EGR switch or solenoid? Had one on a C4 same code took awhile to track down.
how do you like the power? installed acouple of those cams when they came out never got to drive them
how do you like the power? installed acouple of those cams when they came out never got to drive them
09-29-2019, 10:50 AM
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
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Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
It uses a solenoid, as well as the temperature switch. The trifecta of EGR BS!
The car builds steam at 2500 and just doesn't seem to run out of breath by the time the 700r4 shifts. Even at 5500 it didn't feel like it was gasping for air like it used to at 4500.
The car builds steam at 2500 and just doesn't seem to run out of breath by the time the 700r4 shifts. Even at 5500 it didn't feel like it was gasping for air like it used to at 4500.
Last edited by thtanner; 09-29-2019 at 10:54 AM.
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Long Beach Z-28 (09-29-2019)
04-11-2020, 02:34 AM
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Car: 1989 IROC-Z 305 LB9 AT Convertible
Engine: LB9 305
Transmission: AT
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
NICE! Any update? How does it run? Was it worth the work and $4 over the LB9 305? Asking because I'd love something like this (minus the headers and "Box" style intake. I too, have to pass ca SMOG, every 2 years.
04-15-2020, 12:22 PM
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Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
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Axle/Gears: 3.73 Gears
Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Last edited by VincentZ28; 04-15-2020 at 12:32 PM.
04-18-2020, 03:14 AM
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Car: 1989 IROC-Z 305 LB9 AT Convertible
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Re: CA Friendly L98 Upgrade Plan - Review and Critique Please
Is the SLP Airbox "Ca approved"? It Looks like something a SMOG Tech would be concerned about. How would it run power and emission wise w/ the stock PFI upper and lower manifold?
05-11-2020, 02:01 PM
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: CA Friendly L98 Upgrade - In Progress
Yes sir. That unmarked tbi cam is out, and the GM 94666492 (Same grind as Howards 180225-12) has been installed. Installing the heads and doing the valve adjustment tonight after the garage cools down (any time before 7 its hell out there)
A lot of people keep quoting it's the 2032 cam grind, but some people elsewhere measured the duration and it's not as much as the 2032. $350 cheaper, so I'm not going to complain. Closer to the stock cam than the TBI cam was.
Duration is same as the stock 88-89 l98 cam (207/213). More lift of course.
Valve Lift Intake: .450
Valve Lift Exhaust: .465
Duration Intake: 260
Duration Exhaust: 266
Duration at 050 Intake: 207
Duration at 050 Exhaust: 213
Lobe Separation: 112
Intake Centerline: 108
A lot of people keep quoting it's the 2032 cam grind, but some people elsewhere measured the duration and it's not as much as the 2032. $350 cheaper, so I'm not going to complain. Closer to the stock cam than the TBI cam was.
Duration is same as the stock 88-89 l98 cam (207/213). More lift of course.
Valve Lift Intake: .450
Valve Lift Exhaust: .465
Duration Intake: 260
Duration Exhaust: 266
Duration at 050 Intake: 207
Duration at 050 Exhaust: 213
Lobe Separation: 112
Intake Centerline: 108
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