Ok guys, I have a 1990 OBS truck. I recently put a true dual exhaust on the truck with a X-pipe, no cats, and 2 hooker aerochambers. Now, I am thinking of a new system b/c my dad sold his burb and I have a Corsa system sitting around playing with my emotions. This would be sweet to put on the truck(I absolutely love the sound of the Corsa on the NBS trucks) b/c(not to my knowledge), no one has put it on a OBS truck before. So, that means routing a dual system into a 3" single pipe and back out the back with duals and having a unique exhaust for the truck. What would ya'll do? You think it would sound good with the Corsa considering the firing order is different between the two engines. I don't think there would be a performance difference, just sound. I like the hookers but at about 2400-2800 rpms they sound like a tin can with a load on the engine. Decisions...decisions. Thanks for the opinions.

 

what ya'll think?

 

Wow....this is the only time I've heard of that ya'll don't have an opinion...I think I am going to do it and see how it sounds.

 

The old small blocks have a different firing order and have more "burbble" to the exhaust. With the right system they sound more like a muscle car than the Gen-III engines do. Exhaust comes from Gen-III more evenly due to their firing order.
The TBI is no race motor and I think the Corsa systems really shine in the upper RPM ranges. Resonance and drone are more of a concern with Gen-I smallblocks.

...all things to consider.

 

James B., you have a PM. No TBI engine here....MPFI baby with more cubes.

 

lol, okay. That changes things. Try it. Exhaust is easy to play with. I'm on something like Exhaust Version 5.2 now.

I didn't read enough into "Performance Mods: Not exactly stock!!"

 

HAHAHA....that's the point...can't let all your secrets out you know. How's your 383 coming. Do you like the short block from the GM 383? Just trying to prepare my next 383 engine.

 

Since this is your post and you're changing the subject I guess it's okay... lol

GM's HT383 crate shortblock (part number 12499106) will be the easiest most issueless engine build you've ever done. It's got a lot of really good things going for it:

1. It's a late-model 1-piece seal factory-roller cam 4-bolt mains block.
2. Special purpose-designed rods have tight profiles so they don't create clearance problems. The pan rail is unmodified. An unmodified 350 oil pans fits on! Stock 1-piece seal 350 pan gasket works. Worries about cam clearance are eliminated!
3. comes with the crank gear for GM's own single roller timing set already pressed on. There's one huge PITA eliminated, just put your cam in and bolt up the single-roller timing set. (not included)
4. Timing cover is a variant of the plastic Vortec 350 cover with one difference, the crank position sensor bore is thinnly plugged on the inside. (past where the sensor o-ring seals) Use cover as-is or cut through the block-off to use a Vortec CPS in it with reluctor ring.
5. Harmonic Balancer included. This is counterweighted and matched.
6. These High-Silica pistons do not wobble. This engine has no "piston slap" or whatever GM calls that.
7. Oil pump included, pickup tube is already welded.
8. This is NEW, not rebuilt, so deck height is correct as is everything else. I can't figure out how they ended up with a 4.005" bore, but that's what it is and it works.
9. It even came with a dipstick, and that's not even on the menu.

Having not even exceeded 2600 RPM or 25% throttle yet my only impression so far is that it is incedibly smooth. This thing is VERY well balanced. It's awesome. You get what you pay for.

 

Yea...no one except for two people wanted to say their opinions so, might as well learn some info. about the 383 from GM....hahaha.