C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LT1 Engine Upgrade

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Old Jul 18, 2019 | 12:16 PM
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Default LT1 Engine Upgrade

Looking for someone ĺdoesn't have to be a shop) who can work on my 95 Corvette in the San Antonio area. Just broke 100k and now looking to get a significant amount of hp out of the current engine.
Thanks
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Old Jul 18, 2019 | 04:38 PM
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awesome color!
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Old Jul 18, 2019 | 05:33 PM
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A Golen LT1 383 or something like it would do the trick. I had mine built to specs that are pretty close to this motor: https://golenengineservice.com/lt1-p...-block-engine/

The major differences between the Golen mill and my engine are the ignition stuff (24X EFI, coil on plug, Holley ECU) and I have some AFR heads. My motor will likely make more power...we'll see in a week or two.

Last edited by Jaye Bass; Jul 18, 2019 at 05:35 PM.
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Old Jul 20, 2019 | 08:46 PM
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Are you able and willing to throw a significant amount of money at the project? Are you willing to put up with some of the quirks that might come up when you need work done? If you want to make power, it takes cubic dollars. So how much you have to spend multiplied by 0.75 to account for incidentals that you didn't plan for is going to be the minimum that dictates what you can do. My problem, for example, is that I bring it to a shop for work I cannot do and they give me that blank look, assuming they would be willing to work on a stock L98. They don't quite understand what to do with this car since the parameters might be out of factory spec. So either you need to be able and willing to DIY or you need a person who is able to UNDERSTAND it and not be a parts changer. You would have to have a upgraded motor, trans and possibly rear end. After that, tuned.

Last edited by aklim; Jul 20, 2019 at 08:49 PM.
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Old Jul 20, 2019 | 11:04 PM
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Originally Posted by aklim
Are you able and willing to throw a significant amount of money at the project? Are you willing to put up with some of the quirks that might come up when you need work done? If you want to make power, it takes cubic dollars. So how much you have to spend multiplied by 0.75 to account for incidentals that you didn't plan for is going to be the minimum that dictates what you can do. My problem, for example, is that I bring it to a shop for work I cannot do and they give me that blank look, assuming they would be willing to work on a stock L98. They don't quite understand what to do with this car since the parameters might be out of factory spec. So either you need to be able and willing to DIY or you need a person who is able to UNDERSTAND it and not be a parts changer. You would have to have a upgraded motor, trans and possibly rear end. After that, tuned.
I actually found a place with some old school guys who were working on a Vette, Chevelle and and old Chrysler. They seemed to be very familiar with what I want ro have done. Hopefully this will work out. They were referred to me by some of the Newer School (bolt on) guys who admitted that that's not a job they could handle. I appreciate their honesty.
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Old Jul 21, 2019 | 10:28 AM
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Originally Posted by BigCurt
I actually found a place with some old school guys who were working on a Vette, Chevelle and and old Chrysler. They seemed to be very familiar with what I want ro have done. Hopefully this will work out. They were referred to me by some of the Newer School (bolt on) guys who admitted that that's not a job they could handle. I appreciate their honesty.
They probably don't want to get involved with tuning so my suggestion would be to first come out with a budget and a goal. After that, state your location so we might know someone who can tune the car for you and you will need a dyno tune or have to settle for a "guess a tune". After that, contact said tuner and have him design a system that he KNOWS will achieve the goal.
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Old Jul 21, 2019 | 10:40 AM
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I live in San Antonio Texas and I do have a budget area with about $1500 any extras that may show up.
Thanks
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Old Jul 21, 2019 | 10:48 AM
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Originally Posted by BigCurt
I live in San Antonio Texas and I do have a budget area with about $1500 any extras that may show up.
Thanks
Multiply by 10 and you will start to get significant power thst is reliable. Intake, headwork, cam and headers will run more than $1500. Dyno Tuning is good for about $600 and up.

Last edited by aklim; Jul 21, 2019 at 10:50 AM.
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Old Jul 21, 2019 | 11:00 AM
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The 1500 is for incidentals not my budget.
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Old Jul 21, 2019 | 12:56 PM
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Originally Posted by BigCurt
The 1500 is for incidentals not my budget.
Thanks
So budget and goal? How much you have to spend and how much power you want to make?
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Old Jul 21, 2019 | 01:36 PM
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Originally Posted by aklim
They probably don't want to get involved with tuning so my suggestion would be to first come out with a budget and a goal. After that, state your location so we might know someone who can tune the car for you and you will need a dyno tune or have to settle for a "guess a tune". After that, contact said tuner and have him design a system that he KNOWS will achieve the goal.
My suggestion is to Get datacat, tuner cat, a wideband o2 sensor and tune the car himself.

there is a learning curve, but he’s gonna care more about it then some tuner.

and obd-1 tuners are few/far between!
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Old Jul 21, 2019 | 03:59 PM
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Originally Posted by dizwiz24
there is a learning curve, but he’s gonna care more about it then some tuner.

and obd-1 tuners are few/far between!
You think "care" alone is going to make up for skill a good tuner has picked up over the years? I probably could master the "how" in a weekend. Can you say the same about the "why"? It is a LOT OF WORK for a "one off" unless he is making head and cam changes every so often like if you were racing for a purse. Also the tuner can guide him as to the known combinations that work and that is important since you can't throw a pile of parts together and make them perform optimally as a set. Not without a lot of trial and error which costs money and time.

Totally agree which is why I suggested he find one first then make the mods for serious power. It is going to take a while to find the right guy, whomever it is. However, once it is set up and it runs, just turn the key and have fun as opposed to struggling for a long time till you get it just right.
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Old Jul 21, 2019 | 08:24 PM
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Originally Posted by aklim
You think "care" alone is going to make up for skill a good tuner has picked up over the years? I probably could master the "how" in a weekend. Can you say the same about the "why"? It is a LOT OF WORK for a "one off" unless he is making head and cam changes every so often like if you were racing for a purse. Also the tuner can guide him as to the known combinations that work and that is important since you can't throw a pile of parts together and make them perform optimally as a set. Not without a lot of trial and error which costs money and time.

Totally agree which is why I suggested he find one first then make the mods for serious power. It is going to take a while to find the right guy, whomever it is. However, once it is set up and it runs, just turn the key and have fun as opposed to struggling for a long time till you get it just right.
name a list of reliable OBD-1 tuners near him. There arent that many ! Everyone tunes OBD-2.
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Old Jul 22, 2019 | 12:06 AM
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Originally Posted by dizwiz24
name a list of reliable OBD-1 tuners near him. There arent that many ! Everyone tunes OBD-2.
According to an article, Hendersen is in New Braunfels and did his 91 ZR-1 so maybe he might. Either way, call around. I heard LG Motorsports does, not totally sure but it costs a phone call.

http://www.superchevy.com/features/v...t-corvette-zr1

https://www.corvetteforum.com/forums...post1588067317
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Old Jul 22, 2019 | 12:23 AM
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I would start here: http://elliottsportworks.com/ That will get you squared away for ported heads, intake and cam. If you have an automatic and are not changing the toque converter you will need to be very conservative in your cam choice. And if you are conservative with your cam choice, say with an LT4 Hot Cam, you may not need PCM tuning. Say you've dropped $1500 with Lloyd Elliot. Add about $300 for the BBK throttle body. Are you going to want headers? Stainless works are a hair under $1500 for the race ones without catalytic converters. There are cheaper option on ebay, but fit and longevity are questionable. Now look up the full top end gasket set. Engintech for $100, FelPro for $123. But that's probably false economy as I'm sure there are leaks that should be addressed. Better get the conversion gasket set at $46 to do the lower end. Now ask the shop how much to pull the engine, tear it down, send the heads and intake to Elliot Portworks, swap the cam, reassemble the engine with the new heads, oops need a timing set, intake, new cap, rotor and plugs and wires. Oil, filter, coolant, belt, hoses add to the total. You might get it done for $4,000 without headers, but probably closer to $5k. And that's if they don't find anything wrong with your engine.
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Old Jul 22, 2019 | 08:31 AM
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There was a big shootout of afr heads vs elliot’s best on camaroz28 about 10 years ago.

I believe the afr head won the competition.

though its gonna cost
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Old Jul 22, 2019 | 09:43 AM
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This dude tunes LT1 near Houston.
https://noes-shop.business.site/
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Old Jul 22, 2019 | 04:49 PM
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Moe Bailey is in the San Antonio area i believe. moehorsepower@peoplepc.com
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