LT1-LT4 Modifications 1993-97 Gen II Small Block V8
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10s - think I can do it?

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Old Feb 26, 2020 | 02:05 AM
  #41  
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Any updates?
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Old Feb 26, 2020 | 06:17 AM
  #42  
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Originally Posted by StealthFormula
IIRC tuner set it up to shift at 6,400. My factory tach is horribly innaccurate so cannot verify. Now that I have money and don't care about bottom end conservation I'd like to see shifts more in the 6,600 range with the current cam.
looking at that graph personally I’d have it shifting at 66-6700.
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Old Feb 26, 2020 | 08:12 AM
  #43  
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Unfortunately, I don't have any updates. Car hasn't been touched in months because I've run into a bit of a roadblock, I can't find a tuner. I'm hesitant to change the setup until I iron that out. I know 24x is an option but I'm not interested in going in that direction.

I just found a set of used LE2s locally that are the more desirable castings than mine, figure another 8-10hp there. I'm tempted to pick them up to have on hand.

Does anyone know of someone who still tunes these cars in the PA/NJ/DE/MD area? I'm about an hour outside of Philly.

Edit: Lloyd said the difference between 561 casting LE2s and the 374/643 LE2s is 5-8hp, not worth it so the 561s will stay.

Last edited by StealthFormula; Feb 26, 2020 at 10:24 AM.
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Old Feb 26, 2020 | 10:27 AM
  #44  
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I would circle back on the 24x and reconsider it. I have witnessed the improvements first hand on my brothers car...411 PCM's are not that hard to work with and there is plenty of info out there on tuning them. You could get a base tune from LSx PT and finish it yourself.
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Old Feb 26, 2020 | 10:33 AM
  #45  
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Originally Posted by StealthFormula
Unfortunately, I don't have any updates. Car hasn't been touched in months because I've run into a bit of a roadblock, I can't find a tuner. I'm hesitant to change the setup until I iron that out. I know 24x is an option but I'm not interested in going in that direction.

I just found a set of used LE2s locally that are the more desirable castings than mine, figure another 8-10hp there. I'm tempted to pick them up to have on hand.

Does anyone know of someone who still tunes these cars in the PA/NJ/DE/MD area? I'm about an hour outside of Philly.

Edit: Lloyd said the difference between 561 casting LE2s and the 374/643 LE2s is 5-8hp, not worth it so the 561s will stay.
96-97 guys are SOL in this day and age. There's literally one tuning program that is completely unsupported, costs about $400, and pretty much zero tuners have it or have used it.

At this point your options are either drop the coin on the Jet software and try to learn it, OBD1 conversion with free tuning software and try to learn it, or 24x setup and any tuner can work on your stuff.
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Old Feb 26, 2020 | 10:59 AM
  #46  
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Hmm looks like I've got some thinking to do. I'm not sure I have the time or patience to learn and tune myself but that would certainly be the most satisfying. Ideally I'd like to keep the stock PCM and Opti as a nod to how guys were getting it done back in the day with these cars. The 24x swap is pretty pricey for what it is IMO, not sure I can justify that plus the cost of everything else I want to do just to chase a number. Although it would open up the door for future mods/changes. Maybe I just need to keep the engine setup as is for now and focus primarily on improving my existing opportunity areas, enhacing traction, dropping a couple pounds, etc. Lots to think about.
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Old Feb 26, 2020 | 11:16 AM
  #47  
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AFAIK Jet obd2 software is basically unsupported and has been for years. OBD1 stuff is widely discussed and the software itself is free, you just need a cable and a laptop.
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Old Feb 26, 2020 | 11:28 AM
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Originally Posted by myltwon
AFAIK Jet obd2 software is basically unsupported and has been for years. OBD1 stuff is widely discussed and the software itself is free, you just need a cable and a laptop.
Now that I think about it, if I converted the car to OBD1 and got the free software, it may not be terrible to learn and do myself since the only change I'd be making is more cam IF there's a way to get my tune from my OBD2 comp into an OBD1 comp. If so, I could build off of the existing tune, it's not like I'd be starting from scratch. But, that may not even be a possibility and my gut tells me it isn't. I do have friends down the road with a dynojet so I have that at my disposal if I go down the self tune route.

I know my way around a carburetor but this EFI stuff not so much.
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Old Feb 26, 2020 | 12:51 PM
  #49  
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Originally Posted by StealthFormula
Now that I think about it, if I converted the car to OBD1 and got the free software, it may not be terrible to learn and do myself since the only change I'd be making is more cam IF there's a way to get my tune from my OBD2 comp into an OBD1 comp. If so, I could build off of the existing tune, it's not like I'd be starting from scratch. But, that may not even be a possibility and my gut tells me it isn't. I do have friends down the road with a dynojet so I have that at my disposal if I go down the self tune route.

I know my way around a carburetor but this EFI stuff not so much.
I can't imagine you would be able to convert the tune to OBD1 so you'd be likely starting from scratch. The good news is you seem to have a pretty text book setup of LE2 stock short block so there's probably some close enough tunes floating around you can adjust to your individual motor.

The nice thing about the OBD1 is everything to tune, datalog, flash, etc. is free and there are a lot of websites devoted to teaching tuning with the software.

Personally I wouldn't waste any money on the OBD2 jet software, unless you already new how to tune or had someone lined up that knows the software. I'd either convert to OBD1 or go 24x. The OBD2 software is over $500 and at that point how far are you even from just buying a 24x setup and having any shop be able to tune your car. At least with the OBD1, you're out of pocket very little if it doesn't work out.
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Old Feb 27, 2020 | 02:03 PM
  #50  
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Mini update:

I was able to score a used AS&M 58mm TB today for a real good price so I'll be replacing my Professional Products 58mm TB with it. See below for the difference in the inlet portion between two (pics aren't mine, found these comparison pics from an old thread on here - Summit/PP on top, AS&M on bottom):



Realistically speaking, there may be no to a very little 1-3hp difference between the two but the integrated airfoil cannot hurt. I like the improved quality of the AS&M unit and always wanted one, price was too good to pass up so why not. I'll be posting my polished Professional Products 58mm TB for sale soon if anyone is interested.

I'm doing some EWP research so looking to pick up one of those as well. There may be a handful of hp there since it's moving less coolant at WOT, another benefit being the ability to run the pump in the staging lanes to cool the motor down.

Two very small improvements but they are steps in the right direction.

Recently, I was under the car and re-noticed the two bottom 1-3/4" primary tubes on each bank of the motor are pretty bashed in where they merge into the collectors. One of my bullet mufflers has a quite large dent in it as well. Been that way for years just kinda forgot about it. Can't be doing me any favors from a power perspective so there's another potential opportunity area.

Last edited by StealthFormula; Feb 27, 2020 at 03:00 PM.
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Old Feb 27, 2020 | 04:48 PM
  #51  
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Originally Posted by StealthFormula
Now that I think about it, if I converted the car to OBD1 and got the free software, it may not be terrible to learn and do myself since the only change I'd be making is more cam IF there's a way to get my tune from my OBD2 comp into an OBD1 comp. If so, I could build off of the existing tune, it's not like I'd be starting from scratch. But, that may not even be a possibility and my gut tells me it isn't. I do have friends down the road with a dynojet so I have that at my disposal if I go down the self tune route.

I know my way around a carburetor but this EFI stuff not so much.
I feel ya brotha, I’d love to learn how to tune my car as well. It would be especially useful once I pull the trigger on a solid roller setup. I’ve just never really taken the time or spent the cash on the tuning software and data logging stuff so that I could get familiar with how things work. A basic understanding of what’s what and a wide band would probably go a long way. I’m just not 100% certain what the best software to try is.
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Old Feb 27, 2020 | 04:53 PM
  #52  
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Originally Posted by StealthFormula
Mini update:

I was able to score a used AS&M 58mm TB today for a real good price so I'll be replacing my Professional Products 58mm TB with it. See below for the difference in the inlet portion between two (pics aren't mine, found these comparison pics from an old thread on here - Summit/PP on top, AS&M on bottom):



Realistically speaking, there may be no to a very little 1-3hp difference between the two but the integrated airfoil cannot hurt. I like the improved quality of the AS&M unit and always wanted one, price was too good to pass up so why not. I'll be posting my polished Professional Products 58mm TB for sale soon if anyone is interested.

I'm doing some EWP research so looking to pick up one of those as well. There may be a handful of hp there since it's moving less coolant at WOT, another benefit being the ability to run the pump in the staging lanes to cool the motor down.

Two very small improvements but they are steps in the right direction.

Recently, I was under the car and re-noticed the two bottom 1-3/4" primary tubes on each bank of the motor are pretty bashed in where they merge into the collectors. One of my bullet mufflers has a quite large dent in it as well. Been that way for years just kinda forgot about it. Can't be doing me any favors from a power perspective so there's another potential opportunity area.
Beautiful throttle body man, very nice. As for the little dents in your headers and mufflers, idk. All I can tell you is that I watched an episode of Engine masters where they beat the crap out of a set of headers with virtually no change in performance. Based on that I wouldn’t be too concerned.
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Old Jun 5, 2020 | 03:30 PM
  #53  
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Any update for you?
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Old Jun 9, 2020 | 05:24 PM
  #54  
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Originally Posted by 1992rs385HSR
Any update for you?
Nothing on my end. I was looking forward to running the car in the early spring but wasn’t able to given what’s been going on.

Kinda embarrassed that I haven’t done anything in several months but I’ve just got so many projects going on between my motorcycles, other vehicles and my house.

Kinda leaning towards not changing the general setup and just seeing how far I can take it by just dialing the suspension in and working on any other existing opportunity areas.

Anything on your end? I’m excited to see how your car does.
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Old Jun 9, 2020 | 07:39 PM
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Originally Posted by StealthFormula
Nothing on my end. I was looking forward to running the car in the early spring but wasn’t able to given what’s been going on.

Kinda embarrassed that I haven’t done anything in several months but I’ve just got so many projects going on between my motorcycles, other vehicles and my house.

Kinda leaning towards not changing the general setup and just seeing how far I can take it by just dialing the suspension in and working on any other existing opportunity areas.

Anything on your end? I’m excited to see how your car does.

Well unfortunately or fortunately, depending on how you look at it, heads came off and went to LLoyd but I checked the number 1 cylinder and was a gnarly scratch in the bore. Its already been bored 40 over and couldn't be resleeved.
looked at Golen and a few others, and settled on TriStar for their Dart SHP for their 406 shortblock. Stayed with my LE ported heads and upgraded to a 231/239 cam. It's similar to the lunati voodoo cam but more lift basically.
still waiting in strange for the S60 I ordered in April...keep being told "itll ship later this week".
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