Just installed D1SC

MileHigh69 · 04-02-2010, 07:01 AM

I have a stock GM PP HO 454 (8.75to1)with a Retrotek Speed Boss EFI. I just installed a D1SC. We ran it on the Dyno and I had a intake leak. Fixed that with new gaskets. Was running well up and down. No open throttle yet. Had about 12-14 degrees initial timing. MSD ignition with boost compensate. Ran it up to 5100 RPM, about 11.77 A/F ratio, 32 degrees timing, 407HP and 397 Torque, developed 10.5 psi boost, I do not have a valve installed which I plan to add, nor do I have a intercooler. Then it blew the head gaskets. Shut it down. Pulled the heads, everything looks OK. Installing new Felpro MLS head gaskets. Going to add in the MSD retard about 1.5 to 2 so it should reduce the timing by 10-15 degrees at WOT. Remember I am at 1 mile high. We need a little more timing than the low landers. Any other thoughts? Thanks

MileHigh69 · 04-27-2010, 10:32 PM

Update to the last entry. initial is about 15 degrees. Retard is at 1.5 which makes it about 22 total. Works well. Will fine tune it later. Runs real nice, tons of power.

Sponge · 07-18-2010, 04:52 AM

Any pics of your setup?

SScott · 07-29-2010, 09:57 PM

Any updates? How is it running now? Sounds like the timing did the trick.

04-02-2010, 07:01 AM	#1
MileHigh69 New SCH Member Join Date: Jan 2010 Posts: 2	Just installed D1SC I have a stock GM PP HO 454 (8.75to1)with a Retrotek Speed Boss EFI. I just installed a D1SC. We ran it on the Dyno and I had a intake leak. Fixed that with new gaskets. Was running well up and down. No open throttle yet. Had about 12-14 degrees initial timing. MSD ignition with boost compensate. Ran it up to 5100 RPM, about 11.77 A/F ratio, 32 degrees timing, 407HP and 397 Torque, developed 10.5 psi boost, I do not have a valve installed which I plan to add, nor do I have a intercooler. Then it blew the head gaskets. Shut it down. Pulled the heads, everything looks OK. Installing new Felpro MLS head gaskets. Going to add in the MSD retard about 1.5 to 2 so it should reduce the timing by 10-15 degrees at WOT. Remember I am at 1 mile high. We need a little more timing than the low landers. Any other thoughts? Thanks __________________ 1969 Camaro, Procharged D1SC HO 454, 700R4, Retrotek Speed EFI, Air Ride suspension, MSD ignition, Yukon axles and gears 3:73, 12 bolt. Last edited by MileHigh69; 04-02-2010 at 07:16 AM.

04-27-2010, 10:32 PM	#2
MileHigh69 New SCH Member Join Date: Jan 2010 Posts: 2	Update to the last entry. initial is about 15 degrees. Retard is at 1.5 which makes it about 22 total. Works well. Will fine tune it later. Runs real nice, tons of power. __________________ 1969 Camaro, Procharged D1SC HO 454, 700R4, Retrotek Speed EFI, Air Ride suspension, MSD ignition, Yukon axles and gears 3:73, 12 bolt.

07-29-2010, 09:57 PM	#4
SScott Junior SCH Member Join Date: Jul 2010 Location: Alabama Posts: 34	Any updates? How is it running now? Sounds like the timing did the trick. __________________ "The older I get, the more I realize how little I knew when I knew it all."

07-18-2010, 04:52 AM	#3
Sponge SCH Member Join Date: Aug 2009 Location: Belgium Posts: 57	Any pics of your setup?