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

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Old Feb 26, 2011 | 11:20 PM
  #21  
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Originally Posted by hamburgler911
It's just for street (it's actually my daily driver). I went to the machine shop today tho and asked about getting it to pass smog and they quoted me for $9000!!!! Excluding labor!!! So I may have to got with a 383...or find another machine shop
Wow, it takes that much to buy off a smog man?
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Old Feb 26, 2011 | 11:34 PM
  #22  
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Originally Posted by 383vett
Wow, it takes that much to buy off a smog man?
My gosh, $9K?????
bring that smog guy to Illinois, We will Take him around the Diamond Clubs for the guys in Chicago, A few sleezy joints in my hometown area, Then to Big Al's in Peoria.

We will take alot of photos too.

Little extra leverage that way.
If he is married, his wife will be very pleased seeing the photos...........

Then we can get your race car to pass any California Smog Test.

Have to tip that guy $2.00 for his time or trouble. LOL

Brian
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Old Feb 27, 2011 | 01:02 AM
  #23  
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Originally Posted by 383vett
Wow, it takes that much to buy off a smog man?
No no no for the 454 + making it ok for smog
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Old Feb 27, 2011 | 05:19 AM
  #24  
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Get ahold of a state smog ref to find out what the requirements would be. I imagine youd have to use efi from a bb the same or newer yr vette you have namely a tbi truck. Bet this could be done easier than you think,just make sure its legal first, too much work to go through and have them say,no. your mechanic would give you no backup on this id bet.
Sounds like a fun project!!! Of course youd have to sneak in a small cam and some porting on those truck heads lol. Would make a good stealthy runner

It wont be any huge hp killer as it will have to be legal but you can still make tons of good useable torque that will be a blast to own with a factory installed look to it.

Id be tempted to get another c4...350 tpi just isnt enough
Big Block torque is where its at, too bad there was never an option for this.

Last edited by cv67; Feb 27, 2011 at 08:52 PM.
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Old Feb 27, 2011 | 01:50 PM
  #25  
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Originally Posted by Pete K
The first question to go through my mind is "why"?
Why would one want to go through all of the time, and money to convert a small block street car, to a big block street car? Especially in a state that will bust your ***** if the slightest thing is wrong under the hood.
To each ther own I guess, but it sounds like a tremendous waste of time and money to me, for the hp goals you are looking for.

Second, is to mention that your car came from the factory with a 4l60 trans, not a 4l60e.

Third is to ask if you have ever owned and driven a 650 hp car on the street? Especially in a stock chassis, plastic car.
I have much less power than that, and the last time I whacked the throttle, I put a nice crack in the 1/4 panel.

Good luck in your endevour, no matter which way you go.
Pete, I keep telling you, you've got to stay off the guardrails. Willie
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Old Feb 27, 2011 | 01:51 PM
  #26  
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Originally Posted by 87 vette 81 big girl
My gosh, $9K?????
bring that smog guy to Illinois, We will Take him around the Diamond Clubs for the guys in Chicago, A few sleezy joints in my hometown area, Then to Big Al's in Peoria.

We will take alot of photos too.

Little extra leverage that way.
If he is married, his wife will be very pleased seeing the photos...........

Then we can get your race car to pass any California Smog Test.

Have to tip that guy $2.00 for his time or trouble. LOL

Brian
Good one Brian.
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Old Feb 27, 2011 | 08:40 PM
  #27  
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Rebuild motor with better flowing heads, intake, etc for a CARB approved blower.
http://www.smogtips.com/visual_inspection.cfm
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Old Feb 27, 2011 | 11:45 PM
  #28  
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Originally Posted by 383vett
Absolutely no way to pass smog with a big block in a 92 in California (legally).
Unless you swap engines for the test, as I was told a judge did, back when I went down this road.

The car has to pass the visual test, not just a sniffer. No way is a BB going to look like a SBC.

For my street driver. (labeled ""beast by one who knows and builds them) I find the near-BB torque of the 406 a LOT of fun, now that I am over the initial fear.

Last edited by whalepirot; Feb 27, 2011 at 11:50 PM.
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Old Feb 27, 2011 | 11:55 PM
  #29  
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You can do motor swaps but the engine has to pass emissions and have smog equiptment from the yr motor being put in it and has to be the same or newer yr than the car its going in.

To be dead sure check with the state ref they can show you in black and white in writing exactly what the stipulations are.

Now if they want the BB to put out the same emissions as your L98 that could be a challenge, they tighten the belt each yr.

Check into it may get some real good news, or end up stroking what you have.
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Old Feb 28, 2011 | 12:56 AM
  #30  
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If you have emission's to deal with, you will fail the visual test with a big block. And at that point, they aren't suppose to even try a sniffer test. I used to have a emission testing license. I think you would be better off building a big inch SBC. With something like a super ram, and now the miniram can be fitted with a egr valve set up according to TPIS, and a mild cam, you will pass the sniffer. You will need the cat along with everything else that is suppose to be there. But I know you can run 11's and pass emissions. I just built CRCumber(Craig Cumberland) a 396 super ram engine that is emission legal. It will probably make around 500 hp and 560- 570 tq at the flywheel. So you can still go fast and pass emissions. But the days of swapping big blocks in when dealing with emissions are gone. Unless you buy a emission inspector off. emission laws will vary from state to state. But here anything 84 and newer can't have a different engine than what came in the car. They won't take the time to determine if your SBC is a 350 or something else. But a Big Block is easy to tell it has been tampered with.

Last edited by tpi 421 vette; Feb 28, 2011 at 01:03 AM.
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Old Feb 28, 2011 | 07:45 AM
  #31  
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Miniram would be nice only issue is no c.a.r.b eo# amd they wont allow relicating the egr

Maybe a 400 plus ci sbc with a superram is the ticket for him to be legal and have his big torque
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Old Feb 28, 2011 | 04:45 PM
  #32  
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Regarding the smog, in Calif, you can put a different motor in a vehicle only if if it is the same model year or newer, and you have to have all the smog equipment that motor originally had in the donor car, including the diagnostic port and the fuel evap system. I put a 97 motor in a 87 Jeep Wrangler, wound up using the entire engine compartment wiring harness and the dash and gauges from a 97. Big job, but the Smog ref signed off on it. If you feel like you know a shop that will illegally issue a smog cert, you should know that it's illegal, and if you ever try to sell the car that you, the seller, are responsible for all costs of bringing the car to smog legal status.
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Old Feb 28, 2011 | 06:29 PM
  #33  
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The overdrive your looking for is gear vendors which is in El Cajon right off the 67.

As far as putting in a big block and getting through a visual in this fine state, forget it. Never happen. Even if it passes smog. Now if you can buy a guy off, that is one way.

You can put any vette engine in it, newer then your model. You just have to have the computer and emissions system hooked up for that model as well. So I guess you could go lt4, LS1/6/3/9/7.... I think that is all of them.

personally, To get into power in the big block size, some law is going to have to be broken.... and you are going to have to find a way around it. You could swap engines. Swap parts on a big inch small block.

Even if you went to a 406 with a 219 cam and a super ram, to get that 500 FWHP you will need headers. No header is legal on this car. Swaping parts again.

I would just build the Lt1 into a 383 or 396 and get some heads and a cam that is mild enough to just pass emissions. Bolt on and unbolt headers and call it done. You could also look for a carb legal blower. Your lt1 intake is so similar to the miniram and it will pass smog that there is money saved right there.

Or you could buy another C4 and build it with a big block and just swap vins and plates on smog day.
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Old Feb 28, 2011 | 06:37 PM
  #34  
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Originally Posted by hamburgler911
I went to the machine shop today tho and asked about getting it to pass smog and they quoted me for $9000!!!!
yeah, the engine builders cannot help you with making a smog legal big block. Unless they do smogs and shady stuff on the side.
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