5.3L (LM7) into OBS Silverado

[1BADC10]

Guess who's back in bid'niss!!!

[SBTork]

<div class='quotetop'>QUOTE(1BADC10 &#064; Jun 10 2007, 09&#58;31 AM) [snapback]96235[/snapback]</div>

Guess who&#39;s back in bid&#39;niss&#33;&#33;&#33;
[/b]

good.............bout damn time, j/k running strong?

[1BADC10]

<div class='quotetop'>QUOTE(SBTork &#064; Jun 17 2007, 02&#58;00 PM) [snapback]97038[/snapback]</div>

good.............bout damn time, j/k running strong?[/b]

Well... yes & no.

Yes - Runs solid. Had to revamp the tune, and pretty much start fresh. Higher duration cam with a larger lift.

No - No more wheel spin from a dead stop & floor it. I can power-brake to 2K, mash the go pedal, and let go to spin well into 2nd tho. I guess I shouldn&#39;t complain, but this use to be done EASILY. I dropped the tire pressure from 33 - 35 psi in the rear down to 30 psi. There&#39;s a Desired Torque table under one of the TM tables in HPT. I&#39;m not 100% sure how this works (at least have doubts), but I&#39;m sure the higher number = higher allowed torque to be utilized to put power to the pavement.

Now, I&#39;m getting a good bit of KR from 4K - 6K rpm. That&#39;s from 28* to 32* of timing. Gotta spend some time tuning and logging.

[81CHEVYSS]

just curious as to how long your driveshaft had to be for this to work and which way you positioned your mounts?

[kyleholt17]

I have a 83 C10 I am doing a 4.8L swap in and I was wandering what exhaust manifolds would you guys recommend running??? I would prefer not to grind on the frame if you know what i mean! lol

[RedHeartbeat]

'98 camaro/firebird manifolds.

[kyleholt17]

do you know anyone who has any for sale bro??

[RedHeartbeat]

Check ebay and your local bone yards. Post a wanted ad on LS1Tech for them. You'll want 98 only, they're stamped stainless. 99 and newer are cast, IIRC.

[kyleholt17]

thanks man! Ill do some searching...