mike_popson

I've put quite a few street miles on my car with the 3.73's and PT4000. When I first put the PT4000 in, I didn't like the the way it drove because it is a little loose and the TCC lockup was pretty harsh. Bryan Herter raised the lockup to 45 mph and I have been completely happy with it since. What RPM are your shift points? What is the shift extension of your converter?

LCJCary

Well I guess I am the odd man out and my 94 purchased as a GM Program Car is really a strange one. In 95 got the car. Took it to Capital Raceway, Crofton Md. Ran a consistent 13:38 at 104. Auto car, 2:59. All stock. No pc work no nadda. Stock. Best time every was a 13.27 @ 110. Car went off the road in 1999 and just putting it back on. This second 383 is what I call a long stroke. I did get a set of trick flow 185's as opposed to the 195's since research indicated the 185 was the better head...Here's the details. nternals list are below.

1. 97 LT1 features 4 bolt main, scat bottom with 6 inch I beam rods, forged aluminum pistons, Probe 030 383 Dish Top -12.8cc - SRS Piston Set, Trick Flow 185 LT1 cnc chambered heads & intake have been ported, polished and bench flowed by Lloyd Elliot. elliottsportworks.com.

2. Lloyd Elliot also built a custom cam. I am using a rare set of steel full roller rockers @ 1:65 ratio and specs the cam to 610/610 lift; advertised duration @ 228 int 238 exh. Advertise lobe separation is 112.

3. The flow numbers on the heads briefly: 2:87@600 lift exh. @ 210 int.

4. 202 valves were pulled and Lloyd dropped in a set of Ferrea lightweight 2:08's.

5. Bob Bailey, LTCC individual coil pack ignition.

6. MSD Billet full Opti-spark.

7. Injectors are 42 lb Ford green top racing.

8. Water pump is jegs electric high flow

9. 8 LS1/LS6 coils.

10. Torque converter is Yank SS3600.

11. Headers are Hooker long tube super comp, which have been finished with a coating of molten and sprayed aluminum.

12. Oil pan is 7 quart.

13. Scat 3.75 nodular crank, scat 6.00 inch h-beam rods, and probe -12.5 cc inverted dome pistons. With arp 2000 series rod bolts.

After so much incompetence, I took the engine to Chad at Golen Engines in New Hampshire to find out if it was a solid build. Lloyds work was flawless. Chad without knowing the total build suggest 450, maybe 475 at best on the dyno. jFirst pull, 509 hp. Next day it started at 515, stopped at 519. Chad says well lets see if we can get 520? Next pull Chad says, how did that happen? I ask what? He says 528 hp. Now that is with the trick flow heads done by Lloyd Elliot. Chad was shocked. Engine had never been broke in. I told Chad I expect it will make in the 550 and up. Once the Bailey coil packs and the NGK's are added. Chad use ac copper plugs and standard opti spark. So there you have it. The trick flows 185's performed like monsters. At the wheel, hp should hit just over 475 to 510. If supercharger or twin turbos, about 750 and up. Comments and cut me ups' welcome. C.J.

rklessdriver

So you are comparing a set of LLyod's full ported TFS to a set of OTB ones? Your heads are well over 200cc's on the intake ports after Llyod got done with them.

Any good head porter can fix all the problems with the port design of the TFS 23*. It's just not a fair comparison with a ported set v/s an OTB set... espc since the OTB port has so many little problems that need attention.

Your engine makes decent power for what it is but your not breaking any new ground with it.

FYI with those numbers at the crankshaft, when you put it on a chassis dyno it'll put down in the low 400ish RWHP with a Yank 3500 stall and A4 trans. Should be enough power to run mid 11's if the rest of the car is up to it.

Also this is a 6 yr old thread.... I'm sure the OP and others have figured it out by now.
Will

383tpimachine

The gravestone has been turned. wtf.

ElisTwoCents

Lock your doors my CF brothers, zombie threads coming - Isnt there like an autolock feature for like old threads?

I appreciate reading a good thread from back in the day, do it all the time when I need info but seldom disturb the grave out of respect for the dead.