Atlanta s550s Intake Manifold Shootout

I setup a dyno day here in Atlanta after many of us had swapped intake manifolds. Here are the results. I'm sure many of the dyno racers out there will find this enlightening. All the runs were on the same day within a 3-4 hour window. The top run for each manifold were combined into 1 dyno sheet (we used the CJ who was on E85 for comparisons sake). The top runs were:

Danny - CJ - 451HP 381TQ (only person not on E85)
Hooligan - CJ - 450HP 372TQ
Toddfather - Sniper 446HP 365TQ
Rob - GT350 441HP 366TQ
** See mods in overall sheet **
*** All runs displayed in SAE ***

The CJ is the clear winner in HP and TQ

Also here's my results plus the results from the 2 previous times I've dynoed. I was the only auto so hard to compare directly.
Tune and Steeda CAI
Tune, Steeda CAI and E85
Tune, PMAS MBRP catted headers, Sniper, E85

I'm Blake on the first post with the GT350 manifold.

Green is BEFORE the GT350 manifold (same mods otherwise)
Red is AFTER the GT350 manifold (today).

Both Lund tunes. Both on the same dyno, same car. Weird.

Click here for a log of this tune. This is a 3rd gear pull from a few days ago.

Here's the comparison with Danny (CJ on 93), Todd (Sniper), and Rob (gt350)

I am Toddfather :0)

Something is off with those. Two of you that posted dyno sheets show huge losses under the curve. Any chance you guys logged during these runs and can throw your datalog on datazap.me?

And whoever is in that neon green color has huge gains over you guys and he was running 93 octane. Weird stuff.

The sniper doesn't seem like a bad choice considering the price. It's not that far off the CJs at a little over half the price.

blaket0w said:

I'm Blake on the first post with the GT350 manifold.

Green is BEFORE the GT350 manifold (same mods otherwise)
Red is AFTER the GT350 manifold (today).

Both Lund tunes. Both on the same dyno, same car. Weird.

Click to expand...

Your after curve seems normal compared to the other guys, making same power at 5,000 and 6,000. Maybe your before curve not valid.

93 oct fbo cj graph

The green graph was actually e85 my 93oct graph actually was better from 5k uo to 8k

blaket0w said:

I'm Blake on the first post with the GT350 manifold.

Green is BEFORE the GT350 manifold (same mods otherwise)
Red is AFTER the GT350 manifold (today).

Both Lund tunes. Both on the same dyno, same car. Weird.

Click to expand...

This look pretty bad. I would definitely do some data logging if you can.

So the only guy with a GT350 mani and no cats is saying he is making less HP after the install. Can't compare CJ with out cats to GT350 with cats. I think its still a close call.
Thanks for posting!

West TX GT said:

The sniper doesn't seem like a bad choice considering the price. It's not that far off the CJs at a little over half the price.

Click to expand...

X2 on performance/price. Thnx for sharing results guys...

Thanks for sharing guys, great work!

DarkestHour said:

Something is off with those. Two of you that posted dyno sheets show huge losses under the curve. Any chance you guys logged during these runs and can throw your datalog on datazap.me?

Click to expand...

I didn't log the dyno pulls unfortunately, but here is a log of this tune from a few days ago --> http://www.datazap.me/u/blaket0w/gt350-im-w-pmas?log=0&data=1