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GM LS3 LS376/525 Crate Motor

 
Old 11-27-2018, 01:47 PM
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11* overlap should be very streetable. Find a tuner
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Old 11-27-2018, 02:32 PM
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Originally Posted by big hammer View Post
11* overlap should be very streetable. Find a tuner
Your opinion. Many would find it excessive. I would not want to drive it in heavy traffic.
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Old 11-27-2018, 06:28 PM
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Originally Posted by P31Jeff View Post
Back to the original post, just completed an LS1 to a crate LS3 376/525 swap in a 98 T/A. Sent the computer out and had it tuned for the LS3 . Very disappointed . Runs like **** so far. Will keep working away and get it figured out and keep you posted.
you deserve to be disappointed for sending your computer out instead of getting a dyno/street tune.
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Old 11-28-2018, 02:15 AM
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Originally Posted by HioSSilver View Post
you deserve to be disappointed for sending your computer out instead of getting a dyno/street tune.
Thanks for your option. Didn't have 12 hours to drag the car to the tuner . Was under the impression a basic tune from somebody that new what they were doing would get me going . Then we could fine tune it from there.
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Old 11-28-2018, 09:22 AM
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Even if/when someone knows what they are doing, a mail tune is never more than a shot in the dark. All he could do was make a fair guess at your setup.. And the ASA cam doesn't help, as it's tough to tune for street driving as it is, compared to a stock LS3, which this is not due to the cam. Hio was right; it was his option to give his opinion.,

Last edited by G Atsma; 11-28-2018 at 11:04 PM. Reason: added a little punctuaton
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Old 11-28-2018, 11:50 AM
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I mean it's normal to send a pcm out or get a mail order tune to get a car going. But don't complain about it if you knew better. And certainly don't blame the engine if it's not performing right because of that or other issues one might have.

Hopefully p31 will learn from his mistakes and get it sorted. Those are powerful engines and could/should get about 500whp in a good state of tune/bolt ons.
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Old 11-28-2018, 09:06 PM
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Man yall are some pussies lol I drive a 251/258 110 lsa daily . in trafiic . with a manual lol

Good tune = perfect drivability.

p31 jeff.. a mail order tune is just to gwt the car running to check for any issues. You need a street tune.
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Old 11-29-2018, 12:01 AM
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Originally Posted by Mavn View Post
Man yall are some pussies lol I drive a 251/258 110 lsa daily . in trafiic . with a manual lol

Good tune = perfect drivability.

p31 jeff.. a mail order tune is just to gwt the car running to check for any issues. You need a street tune.
so youíre running like 34* overlap... Iím at 32. Does it drive like Stock? No but you could daily it. 11* lol. Bad tune if it drives like ****
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Old 11-29-2018, 01:12 AM
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Was getting a bad reading from a 02 sensor . Runs and drives great now. I was not hacking on the tuner if anything he was more than helpful and gave me lots of help and advice.
Now I have all winter to do a 9" for it. Then fined somebody in the area that knows what they are doing to dyno it

Last edited by P31Jeff; 11-29-2018 at 01:28 AM.
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Old 11-29-2018, 11:42 AM
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Good find
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Old 12-05-2018, 11:16 PM
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I have about 600 miles on my Connect & Cruise Crate LS3/525/T-56 in a Cobra Kit Car! It has 3.55 gears and weighs in about 2300-2400 pounds! It’s got 1 7/8ths weld-up-headers 3 Ĺ collectors down to 3” ID Cherry Bomb side pipes! I still have a lot of work to do and it’s not been tuned yet! I don’t what it’s making but it seems pretty strong, I put it on a Suzuki 1000 V-Strom a couple of weeks ago!

Last edited by LS525cobra; 12-05-2018 at 11:23 PM. Reason: attachment
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Old 12-05-2018, 11:29 PM
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LS/525 on engine dyno!

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Old 12-08-2018, 11:37 AM
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Originally Posted by big hammer View Post
11* overlap should be very streetable. Find a tuner
Any cam in a stock displacement/compression LS3 that has double-digit degrees of overlap REQUIRES 'hands-on' tuning to run well.

Including the ASA cam.

KW

Last edited by KW Baraka; 12-08-2018 at 12:22 PM.
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Old 12-08-2018, 01:16 PM
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KW I know mine does! I'm still trying to come up with a better way run the intake tube and better place to mount the filter!
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Old 12-08-2018, 01:35 PM
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Originally Posted by LS525cobra View Post
KW I know mine does! I'm still trying to come up with a better way run the intake tube and better place to mount the filter!
I'm not sure you have much choice other than what you have, going only by the pic above. Underhood space is TIGHT! Do you feel there is too much restriction with the present setup? Looks like 4" all the way, though two ninety degree turns might be affecting that.
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Old 12-08-2018, 02:13 PM
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The 2 ninety's, the length, heat and it's sucking hot air! You're right not sure there's much choice! Last resort an air box for the filter pulling air from the side vent and insulate the heck out of it! I'm gong to look into lowering the radiator and support enough to bring cold air in over the top of it? I may also try some air straighteners in the intake track since it will be a short run? I need to get it figured out and choose the least worse option and move on! I'm going to blow it back apart for paint and get the interior done, It would be nice to have it ready by spring!
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Old 12-08-2018, 02:29 PM
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Is there any way to run the intake tube straight ahead and over the radiator, putting the air filter ahead of the radiator? Cool air shall then be YOURS.....
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Old 12-08-2018, 02:51 PM
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Not the way it is. I'm going to see if I can lower radiator and support to give a little more room, the hood hinges also may be a problem! Thinking of something like I have seen on some Vettes, wide but only 1-1.5" high!
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Old 12-08-2018, 11:01 PM
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Most Shelby Cobras I've seen have hood scoops. Could you direct air into a boxed area where the filter is now, or build a channel into the underside of the hood that dumps the air forward like the Camaro SS hoods do?


(Some dope drew the 4 lighter arrows facing the wrong way on this image, but you get the idea.)

EDIT: Maybe this hood is a bit clearer. Air gets scooped around the center of the hood, comes out at the front of the hood in front of the airbox instead of above the intake.


Last edited by eb110americana; 12-08-2018 at 11:06 PM.
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