Ran a 245 Raised Port INDY head motor for first time today.....

Little background on the combo, it came to me as a fresh motor complete with 7 dyno pulls on it in NY. It made 580's HP @ 6200RPM, 520's TQ & owner was'nt happy with power & had me go through it & make changes.

Basic combo as ran today:

R3, 59* 4.07" bore, 4.0" MP/SCAT 4340 crank.
Eagle 6.123" H beams W/L19's
Ross off shelf 4.07" Dome 4" crank pistons, 1/16" 3/16" rings, no gas ports etc.
12.6:1 compression
Mancini 8 QT pan
ATI damper
Mezziere water pump/MSD Dist/wires/ignition
Bullet Roller cam 276/280 @ .050", .712"/.692" on 108
Crane Ultra Pros, Comp 3/8 Pushrods
INDY 245RP CNC heads OOB W/SDSS 5 angle VJ & blend 68 CC chamber
T&D 1.5 rockers, INDY 360-3R manifold port matched

Ran two different sets of headers, first set were my dyno headers, 1 7/8" into 2" steps with 3.5" collectors.

Second set are custom made by chassis shop for this guys car with 4" engine setback, 1 3/4" into 1 7/8" step with 3" collectors.

Ran 2 different carbs..... first was 1000 Race Demon modifed for E85 use

2nd was OOB 1050 Quickfuel gasoline Drag carb

Things I changed from original 580HP tune when it was originally built by shop in NY:

Changed intake valves from 2.10" to 2.150", exhausts from 1.65 down to 1.625.
Replaced INDY's Valve job with SDSS 5 angle valve job on heads, hand blend exhaust seats
Port match intake manifold to RP port window, from INDY's std port match job
Re-hone Barton honed block for proper cyl wall finish with TQ plate. (was very rough cross hatch, rings never seated on first build)
Changed pushrods from 5/16" generic hand mades to .080" Comp 3/8 Hi-techs
Replaced 271/275 @ .050", .627"/.639" Comp MM lobe Flat tappet with custom Bullet roller 276/280@ .050", .712"/.692" on 108
Change springs/retainers/locks/cups over to roller setup 240 seat/600 open, tool steel retainers etc.
Put set of Crane 59* Ultra Pros in it
New set of Total Seal AP Stainless Nitrous series rings, setup for small N20 shot.
1000 Demon sent out for 85 Conversion (shop found 2 boosters left 1/2 machined by Barry Grant & fixed that)

Basically just put a roller in it & fix cyl wall/ring seal issues, fix attention to detail items..... Real simple basic motor, NO trick parts in it, only "custom" part in it not right out of a catalog was the cam I designed.... everything else was right off the shelf & thrown together with attention to detail.

1st pull I'll post is best pull we could get with the 1000 Demon on E85... We spent alot of time reworking fuel curve on this thing to get it rich enough, finally got it there with some mondo jetting, but was pretty darn lean OOB from shop that converted it. I think this was winter blend E85... (just got it out of pump in State College this AM, E85 not easy to acquire in PA) so I don't know exact blend, we did test the specific gravity, it was around .785 if I recall. I was thinking it would make 665 before we started the day on E85 & maybe 650 on gas, so we were in ballpark I thought on the E85 after all tuning. This was with the big tube dyno headers, we never ran it with small headers with the E85. This was with 39 degrees timing & 2" HVH super Sucker. We tried timing from 28 to 41, it liked 39-40 best on E85. Shop that converted carb did'nt quite seem to anticipate amount of power the motor would make I think.... We were outside reasonable jetting window by a bunch to get it rich enough. We told them it would make around 650 HP, which was mistake, because on their Land & Sea dyno, our 650s would be more like 720's to them. So kind of our mistake on not giving them better info on carb setup maybe.... although that does'nt excuse all 4 high speed air bleeds being so loose they were vibrating out of carb (luckily I cought that)

Anyhow here the E85 #'s from best pull....