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

396...itīs alive!!!!

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Old Feb 11, 2006 | 10:44 AM
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Default 396...itīs alive!!!!

Hi all

maybe some of you know me building a 396..

today i fired her up...a bit tweaking with ignition timing..and it runs...

what a sound!!! it sounds very torquey! also, the McLeod Stree Twin releases fine!!

i want to say many thanks to all that helped me, answered questions, aso...

special thanks to Jake, cuisinartvet, CorvetteKidNc, Steve40th, Mos90, LD85, Slalom4me, luvmy92,FD2BLK,mothersworry, and all the others

i have a bit problems with high oil pressure, since i used a high volume pump, but all in all..it runs

also thanks to Alvin for the tune, i hope i can drive soon, to have it refined.

have a nice day

Reinhold aka Corvette90

Last edited by corvette90; Feb 11, 2006 at 12:20 PM.
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Old Feb 11, 2006 | 11:49 AM
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Congrats, and on the high oil presure, is it sticking at 80 PSI? If so it may just be a bad sensor or a poor ground. I had a problem on my 84 when i droped in the LT1 where a bad ground caused my OP to read much higer then it actualy was. The bad ground would cause it to read about 65 PSI hot at idle and if you even touched the throttle to jump to 80.
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Old Feb 11, 2006 | 11:53 AM
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Congratulations,

I put mine in over Christmas...

If you want to take a look http://www.ndneyes.com/mo/projects1.html

Good luck with your tune

Mo
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Old Feb 11, 2006 | 12:02 PM
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Originally Posted by FD2BLK

Congrats, and on the high oil presure, is it sticking at 80 PSI? If so it may just be a bad sensor or a poor ground. I had a problem on my 84 when i droped in the LT1 where a bad ground caused my OP to read much higer then it actualy was. The bad ground would cause it to read about 65 PSI hot at idle and if you even touched the throttle to jump to 80.
Hi

sounds a bit familiar...

the pressure stays at about 60 psi, goes up when i give gas slowly, and suddenly jumps to over the board!

i will take a closer look at the sender!!
thanks for the suggestion!!!
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Old Feb 11, 2006 | 12:02 PM
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Congrats, Reinhold! Sounds like your neighborhood has a little thunder in it
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Old Feb 11, 2006 | 12:05 PM
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Originally Posted by Mo_Bandy
Congratulations,

I put mine in over Christmas...

If you want to take a look http://www.ndneyes.com/mo/projects1.html

Good luck with your tune

Mo

Hi Mo

thank you!!

i know your site very well, i came across it, when i searched google for 396..

looks very nice and clean your engine!!

have you fired it up already?

regards
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Old Feb 11, 2006 | 02:08 PM
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Originally Posted by corvette90
Hi

sounds a bit familiar...

the pressure stays at about 60 psi, goes up when i give gas slowly, and suddenly jumps to over the board!

i will take a closer look at the sender!!
thanks for the suggestion!!!

A qick check that worked for me is to find a good place on the sender with no paint (I Scaped it a little to mak sure) Then I used a hose clamp to clamp a wire to the outside of the sender and hooked the other end to a known good ground (I used an intake stud). For me the problem wqs that I had remote mounted my sending unit with rubber line but I could see the exact same problem with teflon tape or RTV if it became an insilator. The sending unit needs ground as a refence. I hope this helps if not it was a free shot.
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Old Feb 11, 2006 | 02:26 PM
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So exactly how much clearancing did you do to the block? Were there any problems with the oil pan and the big crankshaft counterweights? I bet that sucker sounds evil. I feel sorry for your clutch.
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Old Feb 11, 2006 | 02:46 PM
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Originally Posted by Mo_Bandy
Congratulations,

I put mine in over Christmas...

If you want to take a look http://www.ndneyes.com/mo/projects1.html

Good luck with your tune

Mo
Great pics, Mo. And to restate the question: fired 'er up yet?
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Old Feb 11, 2006 | 03:11 PM
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I'll bet you had a huge smile, ear to ear!

Be safe!
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Old Feb 11, 2006 | 03:18 PM
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Congrats, i wish i was where you are, I'm pulling my motor today
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Old Feb 11, 2006 | 04:53 PM
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Originally Posted by kopbet89c4
So exactly how much clearancing did you do to the block? Were there any problems with the oil pan and the big crankshaft counterweights? I bet that sucker sounds evil. I feel sorry for your clutch.
Hi!!

i used an GMPP Block, so clearancing was moddest, i think about .1-.15 inches

i used an forged eagle crank, and a 240-15T (hope this is the correct number) stroker oil pan from Canton.

i had only to bend the crank scraper about .050 inches

the sound...a deep rumble, with a bit lope..just fine :-) ..big block style

Ths street twin should take the abuse..i hope so
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Old Feb 12, 2006 | 12:30 AM
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Originally Posted by corvette90
Hi

sounds a bit familiar...

the pressure stays at about 60 psi, goes up when i give gas slowly, and suddenly jumps to over the board!

i will take a closer look at the sender!!
thanks for the suggestion!!!
Congratulations on getting the engine up and running!

There are a few things that effect oil pressure other than bearing clearances. One is the weight of the oil you're using and another is the temperature of the oil.

Once the oil reaches normal operating temperature, somewhere in the area of 200 degrees F, the pressure will be lower than it is when the oil is cold as when the engine is first started.

The ambient temperature - how cold it is in the garage or outside - will cause the oil to take longer to reach its operating temperature, so go easy on the RPMs until the oil comes up to normal temperature.

Keep us posted on what you find.

Jake
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Old Feb 12, 2006 | 12:53 AM
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Great to hear, I'll bet it'll be a beast. What Jake said re/ oil pressure. With a Canton pan you should be fine w/ a high volume pump. Keep us posted!
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Old Feb 12, 2006 | 02:17 AM
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Originally Posted by 96CEwGEARS
Great pics, Mo. And to restate the question: fired 'er up yet?
Yes I have about 2500 miles on it now and supercharger installed have pulled 9.5 pounds of boost thus far, I'n sill getting the fuel ironed out.. but it hazes the tires at will, quite an animal. I've pulled over 54 lbs/min through the MAF at 72% throttle

regards, all...

Mo
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Old Feb 12, 2006 | 03:39 AM
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Hi Jake!

i use 10W-30 oil, maybe i will switch to Mobil 1, also, i wont be hard at the throttle for the first 1000 miles

How would you break in the engine?

i read somewhere, ot to make the highest rpm, but put load on the engine..that expands the rings against the walls and seat them well

thank you
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Old Feb 12, 2006 | 03:47 AM
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http://mototuneusa.com/break_in_secrets.htm

Here is the i followed and by others on here.

Congrats on new killer, post some idle and rev vedio clips, i love that muscle sound.
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Old Feb 12, 2006 | 08:29 AM
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Nowdays with todays better ring packages the motor is nearly broke in immediately upon startup. I have seen motors started up, run for ~3-4 minutes to set the timing etc. OIl changed, car loaded onto trailer, unloaded at track, driven to staging lanes, and run down the strip with no ill effects. If its going to hold together, then its going to be fine to do the above. If its going to blow apart - its going to blow apart. There is nothing that is getting "seasoned" or anything in a motor. Its either going to hold together or not.

People are just leary the first couple of times running a motor real hard, as that is usually when you find something is not right.

As for the rings, I always just run the car like normal - HARD.

They are like kids, teach them early what you expect and the rest is pretty simple.
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Old Feb 12, 2006 | 09:42 AM
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Originally Posted by sami85L98
http://mototuneusa.com/break_in_secrets.htm

Here is the i followed and by others on here.

Congrats on new killer, post some idle and rev vedio clips, i love that muscle sound.
This method worked great for me every time! You can pretty much break it in, in the first 30 minutes of driving the car once it is warmed up!

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Old Feb 12, 2006 | 12:31 PM
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The new school of thought says to break in an engine the way you are going to drive it. This will cause the rings to seat so that they seal best for the way you normally drive and will make the engine more efficient. No more babying it for the first 500 miles because the rings will seat under these babied loads and when you drive it as you normally would they will have to reseat creating more wear than necessary.
Hope this helps
Jerris
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