Since I ran the 12 I figured I could tear into the engine now. Ryan did the same thing after runnign his 12... but he just put a D1R on instead. Me... I swapped the intake manifold from a stock 93 5.0 intake top and bottom to a 93 Cobra manifold that had been extrude honed. This is not a small cross sectional area. These ports are big enough for alot more than my engine. The lower was ported to a felpro 1250, which was about 1/8th of an inch larger than my head ports all the way around. I didnt touch that "shelf", so thats no doubt creating some issues. Also, from the look of it, this intake needs a different cam. The stock cam is making no use of this intake.
So here it is... and no wonder it felt soft on the bottom.
View attachment 525335
At least I can feel comfortable that it will 1/4 mile alot better. I certainly have recalculated my shift points.
interesting data. I'll try and run the 1/4 soon, but schedule doesnt look good for awhile and I have some 1.7 RRs and some new valvesprings waiting to go on.
I'd like to think that the intake was worth about .15 in the 1/4. We'll see. Its clearly not as much fun on the street... although 284 lb/ft isnt horrible.
chris
So here it is... and no wonder it felt soft on the bottom.
View attachment 525335
At least I can feel comfortable that it will 1/4 mile alot better. I certainly have recalculated my shift points.
interesting data. I'll try and run the 1/4 soon, but schedule doesnt look good for awhile and I have some 1.7 RRs and some new valvesprings waiting to go on.
I'd like to think that the intake was worth about .15 in the 1/4. We'll see. Its clearly not as much fun on the street... although 284 lb/ft isnt horrible.
chris
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