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Dart block
Ccw crank, H beams
-7 cc valve reliefs
PRC 247 62cc
Martin Smallwood Cam
246 258 637 620 112+2
Out the box MSD
Ewp
1 7/8 headers Full Exhaust
Twin disc
pst driveshaft
3.90 12 bolt
315 r888r
108 degree and 100 percent humidity today
24 degrees total timing 12.8 afr
Final numbers where 577 535
Here's the only graph I took a picture of.
How dare you put cathedral port heads on a 427 and make just as much as most ported ls7 headed and aftermarket cam in a stock bottom engine ls7 lol!! Awesome work! Personally nice to see what you did!
How dare you put cathedral port heads on a 427 and make just as much as most ported ls7 headed and aftermarket cam in a stock bottom engine ls7 lol!! Awesome work! Personally nice to see what you did!
here i fixed it for you “How dare you make put on catherdral port heads on a 427 and make just as much as most stock ls7 headed and aftermarket cam in a stock bottom engine ls7 lol!!”
Nice results, but why is the first dyno chart in SAE and the second one In STD?
Sorry we where comparing to a few shops cathedral port builds on here all stp number's. Gains are the most important to me as many have said the Msd doesn't respond to porting....
583hp 545tq sae
Smallwood has spec'd me another Camshaft to try, so Maybe next month I'll have some results on that.
Nice numbers, any plans to take it to the track before the cam swap?
The car has a full road race style suspension setup, but I guess I could make a hit to see what mph it would do...
Definitely not light either at 3600 pounds.
The car has a full road race style suspension setup, but I guess I could make a hit to see what mph it would do...
Definitely not light either at 3600 pounds.
Sorry we where comparing to a few shops cathedral port builds on here all stp number's. Gains are the most important to me as many have said the Msd doesn't respond to porting....
583hp 545tq sae
Smallwood has spec'd me another Camshaft to try, so Maybe next month I'll have some results on that.
Before you spend more $$$ on a cam, go 2in headers/3.5 collectors. You are at the power level where it makes sense to crossover to a bigger/better header. I would certainly, absolutely, try that first before doing anything.else. Congrats, the combo is rocking!
FYI, and don't get offended-please, but I think your heads are crap and it still made amazing power. I can only imagine a Brodix cathedral or a Mast 295 cathedral on this and the power it would make. I have talked with a guy several years ago who made 2hp per cube on a decent 408 with ET cathedral heads. It's totally possible, you just have to get a touch more serious and you are there. We should meet, I am in South Florida, lmk if you ever come to my area.
08-13-2023, 07:11 AM
427 Catheral port Dyno 
