421 Stroker with Trick Flow Heads/Intake Dyno - Redux

A few months ago I started a thread here about my 421 Trick Flow stroker project. After speaking with the mods, it sounds like there was a server issue and that thread got wiped out. Shame, because there was some good content in there and people seemed genuinely interested.

So let's try this again...

The goal of this project is to see how far we can take a set of OTB Trick Flow Heads with their matching Intake on a larger cubed stroker motor with a roller cam. Data is king, so I'll be sharing this information with the community so we can all learn together. I honestly don't know what kind of numbers this combination will produce. If I can get 1.25hp per cube, I'd be satisfied. I'd prefer more, but I'm setting conservative expectations. This is more of a test than anything. I'll be updating this thread periodically as future tests are performed.

Here are the specs on the build:

1991 LA 360 Roller block
11:1 C/R (verified)
Ross Racing 0.030" pistons
4.120" forged crank from Ohio Crankshaft
6.2 Chevy Rods
1.6 HS Rockers
Bullet Roller Cam: .601 int/.601 ex (fig. using the 1.6 ra) - 108 LSA - 236/242
Morel 6072 Lifters
Trick Flow Heads
Trick Flow Intake
Quick Fuel Brawler 850 carb
Ishihira-Johnson Crank Scrapers
KEVKO 7qt pan
ARP everything
MSD everything
Exhaust: We'll be using a set of 1 3/4" LT headers from the dyno shop.

Once the engine dyno is completed, Cope Transmissions will be using that data to select an appropriate converter stall for my 904 transmission. After that we'll progress to a chassis dyno and tune the entire combo from there. In the Spring, I'll start testing at the local 1/8 mile and get some real-life *** dyno results. This will be going into a 72' Scamp as a street/strip car. (More on that later).

***When Ross made my pistons, I had them add extra material around the crown so I can add nitrous in the future. For the sake of transparency, the rings were appropriately gapped for nitrous (150 jet). That will likely factor into the dyno results, so I wanted to make mention of it.



Here's the TF intake next to an Indy 360-1 intake for comparison