neverfastenough
Registered User
To start it off, I decided I wanted to do heads an cam this winter. Since the engine was beat on for the past 3-4 years, I decided I should probably remove the engine just to check things out instead of just slapping heads on it. At the time the engine was basically stock split port heads, eagle rods, diamond pistons, svo roller rockers, sheet metal upper intake. So the engine came out and went to Dave's at SCU. We pulled the heads and noticed both had been lifted before, 22psi and pump gas showing its ugly head. Pistons looked exceptional, rods of course fine, and crank in great shape. Rod bearings showed some abuse and there were signs of crank walk on the main caps. Normal high hp wear with some detonation.
The rebuild: I didn't want to cut any corners here, and I really believe we didn't. The block went out for line hone and the crank out to be turned polished and balanced. Ring seal was so good on the previous build, we decided not to hone it. Pistons were cleaned blasted then coated, moly graphite on the skirts and ceramic on the tops. The coating didn't stop here, every bearing in the engine was coated by calico. Along with that, the windage tray got an oil shedding coating. A 6qt mustang oil pan was used and the pickup tube was moved as a result.
For the heads we went back to singles, serious ones. These heads are the best flowing set of sc heads in existence. Because of that, it would be a crime to put cheap stuff on them. SO they received hollow stem stainless intake valves, severe duty stainless exhaust valves, and possibly the meanest springs ever to go on a sc head, topped with titanium retainers of course. Next came some sweet solid roller lifters from comp and an aggressive sissy cam, if that makes sense. Again, no skimping, a billet double roller timing set went on, and yella terra rockers.
Topping it off, I got ballzy here. Me and Dave whipped up some intake flanges and I built a sheet metal intake from the heads up, A first in the supercoupe world I think. It came out better than I imagined , and was topped off with a ross machine racing billet 75mm TB and some custom SCU rails housing some deatchwerks 120lb injectors.
The results:
Had some issues initially on the dyno, trial and error sorted it out though. A lot of good minds surrounded the car on the dyno. We had feared we fouled the plugs, so my cold ones where removed and replaced with 103's because it was the only thing available. We fired the car up, e85 in the tank, fuel pump on high, and pulled it with the wastegate spring in only. The car came on strong with the turbo hitting around 3500-3800 rpm 16psi and well into 400rwhp. We continued to dial the car in on 16psi until we were comfortable with the afr and timing, max conservative hp at 16psi was 470rwhp.
Time to quit the sissy stuff, we pulled the wg spring and went for something around 20psi. First pull totally raped the tires on the dyno, so VHT was added, and we pulled it again. Well into the 500 range now, the car was laughing at us. We could have pulled it until it ran out of gas and it would have laughed at every bit of it. Time to crank it up.
25psi and the vht gave up the grip, it spun like hell. Stuck my 300lb buddy in the trunk, cranked up air bags and we hit it again. Easily cracked the 600rwhp barrier. With some more tweaking we got it to 625rwhp ish with some wheel spin and the 103's getting their arse's kicked. Spark blow out was bad enough that we felt like we had to stop with the boost and call it a day. So with my bud in the trunk we stuck the car in 4th(all previous pulls in 3rd) and went for a glory pull. Unfortunately, I forgot to turn the dyno fans on. ACTs reached about 140 causing the car to pull 3 degrees and with the spark blow out it wouldnt let us make any power past 5800, which is silly rpm for this motor, it was loving near 7k on the lower boost pulls.
Overall we ended the day with 636rwhp 590rwtq. All smiles in the dyno room, the car didnt make one odd noise, not one leak, no smoke, no pops, no stalls. 6900 rpm pulls came right back down and idled with no issues. Coolant temps never even made it to 170 degrees. We all knew it had more in it, full pull, no retard, and a lb or two more boost would have had us in the 700's, but when youre blowing spark youre blowing spark. At this power level the engine is as happy as can be, its really not breaking a sweat. Its a bitchin little combo that should be wicked on the street.(Note: this car was driven 2.5 hrs to the dyno and 2.5hrs home from the dyno)
Tons of pics can be found on my facebook Corey Binks, and SCU's facebook page.
Since I screwed you guys here on pics, heres a video of a 16psi pull, enjoy! BTW you know you have a serious blow off valve when you clean the floor when you let out of it
<iframe width="560" height="315" src="//www.youtube.com/embed/YMEypk59q2U" frameborder="0" allowfullscreen></iframe>
Oh and Dave Dalke can chime in if he wants to cover anything in more detail, I think he was actually having fun tuning the car
Last edited: