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500 RWHP 346 Pump Gas engine (w/ only a 229' camshaft!!)
Guys,
Awhile back I posted about my latest and greatest cathedral heads for a 3.900 bore engine....my new MMS 227X heads which are essentially slightly reworked versions of my 220 heads that Darth V8R and a handful of others rocked some good number with.
I was confident these heads in optimized trim could generate over 500 RWHP with a camshaft less than 230 degrees @ .050 (on pump gas of course). Something street friendly with good manners and a really broad torque and power curve besides the big peak number I was looking for.
One of my customers finally got one together that accomplished just that and the peak torque this combination produced was excellent as well (in fact the best I have seen to date with a pump gas 346....this engine is only 11.37 to 1 compression btw)
Check out the final power and torque curve (the tuning shop said this was the best N/A 346 they have ever had on their dyno btw).
504 RWHP / and almost 455 RWTQ (These are very solid numbers for a healthy 6.0 build IMO)
Car is a very clean 02' Camaro SS and I forgot to mention it has 4.10 gears as well (this thing would have seen 510 ish with the stock ring and pinion ratio!)
Quick rundown of the parts in this build
OEM 346 shortblock
MMS 227X heads milled to achieve 11.37 w/ .040 gasket
MMS custom grind cam 229 / 235 @ .050 114 LSA
Johnson 2116 LSR lifters
MMS Ported Melling pump
MMS Ported 102 FAST intake
Yella Terra Ultralite rockers 1.7 ratio
Mamo lightweight RPS clutch assembly (Steel wheel)
C5 repro 18" X 10.5" rims w/ Nitto NT05 tires (a fairly heavy tire/wheel combo also)
I believe the car has 1.875 headers but need to defer to the owner on that who will be chiming in soon
Really happy with these results....I was confident these type of numbers were attainable based simply off what I achieved with my own C5 Vette 20 years ago with parts that were excellent in their day but not as good as what Im producing now.
The new stuff Im shipping is even more efficient and moves larger volumes of air on both intake and exhaust and still has excellent velocity. There is better manifold availability now....better cam lobe profiles etc.
Hell the old timers here might remember I made 475 RWHP with a smaller 224 cam back then.....435 ish torque but I also spent alot of time dialing that car in....alot of time. Even those numbers still look good today factoring in the very street friendly 224 stick (that build had one of the first sets of AFR 205's I designed back in the day)
The curves this engine produced are excellent....torque carries for a long way and peaks fairly late for this sized cam with the heads helping out a bunch in that department.
Anyway....would love to get an idle video and possibly an in car action ripping thru the gears! Will leave that up to the owner to see if he can accommodate us
Any of you reading and thinking about something similar don't hesitate to reach out.....I have a decent amount of inventory in my 227 X heads at the moment....lead times would be pretty reasonable
Those numbers, that curve, and I bet it drives nice too. Damn fine work, as expected. If GM were smart, they'd hire you to put together GM Performance upgrade packages and sell them at dealers.
I remember your C5 Tony. That was a car ahead of its time. It was a beast. I think most guys today would be happy with 11.20s@125mph, and still get 25mpg. This new motor thats at 500+whp.....Wow, impressive with the smallish cam, too.....
Today, 01:50 AM
500 RWHP 346 Pump Gas engine (w/ only a 229' camshaft!!) 
