Rhs Indy X Head Thread
I'd like to clarify a few things about the test session and things that happened.
First, we took the engine to 6000rpm because it was done making power at 5700rpm!
No need to go past that point, although I did run it to 6200 but only recorded up to 6000. Just the way the DTS works.
Second...the Demon was LEAN OOTB, so I stepped the jetting up from 75 to 77 in the primary and from 83 to 86 in the secondary. After that I expected some change...we got none! Infact it was still lean and made no power difference what so ever.
So believing that carb was not going to come around, I changed it for my 1000HP with OOTB jetting and PV's.
Instantly made 17 more HP and 10 average HP from 3000 to 6000rpm!
After that we tried the super duper spacer and lost 7Hp and a ton of average HP and TQ.
Retested with the spacer removed and HP came back. Best timing was 34° total. I'll post the dyno graph next week so it's more visible to see what was happening.
Peak TQ was 4800 and peak HP was 5700rpm and HP only dropped a few from there.
It'll be a 6500rpm in the car engine no problem.
Not too shabby for cast iron "replacement" head.
Final compression was 10.2:1.
And we also ran the water pump mech. so there could have been 10HP right there for all you #'s hogs!!
I'd like to clarify a few things about the test session and things that happened.
First, we took the engine to 6000rpm because it was done making power at 5700rpm!
No need to go past that point, although I did run it to 6200 but only recorded up to 6000. Just the way the DTS works.
Second...the Demon was LEAN OOTB, so I stepped the jetting up from 75 to 77 in the primary and from 83 to 86 in the secondary. After that I expected some change...we got none! Infact it was still lean and made no power difference what so ever.
So believing that carb was not going to come around, I changed it for my 1000HP with OOTB jetting and PV's.
Instantly made 17 more HP and 10 average HP from 3000 to 6000rpm!
After that we tried the super duper spacer and lost 7Hp and a ton of average HP and TQ.
Retested with the spacer removed and HP came back. Best timing was 34° total. I'll post the dyno graph next week so it's more visible to see what was happening.
Peak TQ was 4800 and peak HP was 5700rpm and HP only dropped a few from there.
It'll be a 6500rpm in the car engine no problem.
Not too shabby for cast iron "replacement" head.
Final compression was 10.2:1.
And we also ran the water pump mech. so there could have been 10HP right there for all you #'s hogs!!