In May, I was driving home and heard a clinkety clink. Pulling over immediately, I saw that a weld had broken on my TSP 1 7/8" passenger header. I drove it the remaining 2 miles home and woefully posted my dilemma, and a few good chaps here told me to get ahold of TSP right away, so I did. I got a new set of 2" long tubes with a 25% discount! Then I had them sent to JetHot for a ceramic coat!
Out with the old...
And in with the new...
So that spring also came the group buy announced by LOD Speedworks for 5 interested in their X-1 intake manifold. At a discounted price of $1250 shipped! I was the first one to jump on it, then we managed to get 4 others, and it was on! I had decided that I was going to go for a centri setup and that this was the perfect manifold to pair a Procharger F1-X with, as I had not seen anyone with the combo, I wanted to be the guinea pig, even if I will likely get beaten to that end state. I also nabbed up a CHE trunnion kit. Cheap insurance, especially considering the operating range that the LOD was going to demand.
Thus, the Fab 5
, as we were, were awaiting our manifolds. After some delays in production with machining issues and floods in Houston, I finally received my X-1 just a day or two before my dyno day at GPI!
I headed down to Arkansas to GPI to drop everything off and let them work their magic, and came back down a few days later to see it on the dyno.
With LOD X-1 intake
483rwhp@7600rpm
407 ft/lbs@4900rpm
Baseline
471rwhp@6400rpm
429 ft/lbs@5200rpm
I gained 12rwhp and lost 22 ft/lbs. I am looking more at the curve and the powerband. It pulls strong and you can see this manifold just eats and eats. I need a 102mm throttle body though, for starters, look into port matching to a set of LS3 heads, and just to complete the build.
The shift points are now 7400rpm for the 1-2 shift, the 2-3, and 7600 on the 3-4 shift. Ben raised those quite a bit up from 7k, which they were at. On shifts it usually will go down to 6200.
So far, the butt Dyno is happy and it's pulling harder than before. Here are a few short inside the car videos.
The first is a soft launch 0-75mph
The second is from 20 to 80 miles per hour.
The third video is from 48 to 94 miles per hour. If you look at the tach you will see it shoot all the way up to 7700 RPM! I let off just before the converter started to lock up.
Track results:
My baseline for this was my previous best from last November. I was able to dig up my old time slip to do a side-by-side comparison.
DA for the November run was 592 ft
DA for tonight's run was 2035 ft
On the left is the November run, on the right is tonight's.
When I calculated the corrected times, the run from tonight beat the old one, and still hitting those 1.5x 60' times. So even though I lost 22 ft/lbs of torque, it really didn't affect 60' times. Below are the actual times, A being the November run, and B being the July run:
A. 11.320 @ 120.34mph with a DA of 592 ft
B. 11.415 @ 119.61mph with a DA of 2,035 ft
The corrected figures are as follows, AX being the November run, and BX being the July run, and reflecting a better run when adjusting for DA:
AX- 11.335 @ 120.353 MPH
BX- 11.249 @ 121.522 MPH
I ran the tires at 25 psi and launched at about 1700 rpm, nothing crazy, the converter was happy. We'll see how things go this fall when it cools off and DA is better, see you at the track!