Posted By: a408swinger
360-1 RP smallblock heads (Indy) ??? - 04/22/09 11:11 PM
Anyone else running the raised port or CNC indys on their smallblock? Just wondering if you have dynoed the motor what timing it liked. The CNC heads have a much larger chamber and I noticed on the dyno that the motor was picking up power each time I increased the timing. I went from 30 to 33 to 35 and finally ran out of time and had to pull it off the dyno. I picked up 10 rwhp going from 33 to 35 and Im wondering if it wouldn't make even more power at 36-38*. My motor also seems to like more fuel than before. Ive got a 1090 cmf king demon and went from 93 jets to 96's and it was still lean (13.9). It was 14.7 with the 93's. What do you guys think. Oh, it made 540 to the tires so far. The car made 513 rwhp before with the hand ported 360-1's and ran a best of a 6.19 @ 111.
Posted By: RyanJ
Re: 360-1 RP smallblock heads (Indy) ??? - 04/24/09 12:55 PM
EVERY INDY CNC Chamber motor I have done.... does'nt matter what piston shape, what compression, what fuel.... has made best power with 38-42 timing. Looking at the burn patterns on pistons & chambers off of used ones they have real good burn, but like alot of spark lead......
Sounds like it picked up at least 30 HP over what seemed to be some pretty radical hand ported -1's. Hopefully you can find even more, glad you finally got the piston hassles etc ironed out.
Posted By: Jacob Pitt
Re: 360-1 RP smallblock heads (Indy) ??? - 04/24/09 02:19 PM
That's good to know. I recently ran my 422 with 360-2 heads for the first time with 34* timing. I didn't get to do any tuning but it sounds like there is plenty of power left just from timing. Your car runs good. Got any pics?
Posted By: Ian
Re: 360-1 RP smallblock heads (Indy) ??? - 04/24/09 04:35 PM
tom that baby going to hall [Edited by Moparts - Keep it clean] ,try a smaller carbie etc 950 had a simlar problem and it fix it or maybe 4 hole spacer i am thinking air speed may be down a tad , i may be rong .
Posted By: SB449VALIANT
Re: 360-1 RP smallblock heads (Indy) ??? - 04/24/09 06:06 PM
449RPINDY small block with 14.2:1 and 59 cc chambers, sorry to hear about the pistons, btw mine are diamonds with all the trick stuff also fully lightened for free,btw i did ask for that it was free..lol
Posted By: SB449VALIANT
Re: 360-1 RP smallblock heads (Indy) ??? - 04/24/09 06:35 PM
.060 off, v/c are moroso.
Posted By: SB449VALIANT
Re: 360-1 RP smallblock heads (Indy) ??? - 04/24/09 11:08 PM
ohh! man that's a bad thing, those RP heads really like an Extremely tight piston to valve clearance,just ask Ryann iam sure you know this...
gilberto
Posted By: 440W8 Duster
Re: 360-1 RP smallblock heads (Indy) ??? - 04/26/09 03:38 PM
Tom how did you(car) do this weekend?
Posted By: mr. 63plymouth
Re: 360-1 RP smallblock heads (Indy) ??? - 04/27/09 05:10 AM
461 small block in a 68 Barracuda with indy heads made 741hp and 638torque on pump gas, naturally aspirated,single 750holley timed at 33. Car went
9.75@139.88mph on a 10" tire
Posted By: mr. 63plymouth
Re: 360-1 RP smallblock heads (Indy) ??? - 04/27/09 05:23 PM
Yes cnc heads, 3030lbs full street legal, lights, horn,wipers etc.. they all work, small converter(3200) witch I think is holding it back some, best 60foot 1.420, pretty shitty,but still ran
9.75@139.88mph.
Posted By: Otherlane
Re: 360-1 RP smallblock heads (Indy) ??? - 04/27/09 06:33 PM
I agree with 369cfmW7 that car should get though the traps in no time.Yes converter has a lot to do with it but I believe you need a domintor also. What size headers are you running?
Posted By: mr. 63plymouth
Re: 360-1 RP smallblock heads (Indy) ??? - 04/27/09 06:50 PM
Tried a 950 on dyno, only picked up 11hp, so left the 750 on with the 1 3/4" headers and smaller cam. Bigger carb would be more efficient with bigger headers and cam!Car is very mello on the street, idles excellent!! Thats with 5000feet air!!!
Posted By: Otherlane
Re: 360-1 RP smallblock heads (Indy) ??? - 04/27/09 07:34 PM
I believe a 950 is about the same as a 750 or a 850. I bet its nice on the street but I would like to see that engine in race trim. it would have to be a low low 9 second car.very nice car
Posted By: mr. 63plymouth
Re: 360-1 RP smallblock heads (Indy) ??? - 04/27/09 07:42 PM
Thanx man, My whole thing is to have a quicker street car thats naturally aspirated on pump gas, Trust me it took alot to get hear.Dominator would be too much for the street!
Posted By: KOS
Re: 360-1 RP smallblock heads (Indy) ??? - 04/28/09 01:23 PM
it takes about 10min to change carbs.........no reason not to run a dom at the track.i also run a 750 on mine while street driving.i have a 1050w/adapter already setup just unbolt the 750 fuel lines and linkage plunk it on and viola.btw your probably good for 2tenths over your current best
Posted By: Otherlane
Re: 360-1 RP smallblock heads (Indy) ??? - 04/28/09 01:30 PM
Don't want to get off topic but W5 dart I like to hear your engine combo.Are you running RP heads? What does you car weigh?
Posted By: W5Dart378
Re: 360-1 RP smallblock heads (Indy) ??? - 04/28/09 01:50 PM
X block, Chapman W9 alcohol cnc heads non RP,3200#,3.55 gear, little nitrous, 10* spark lead = slow,, but it was the only pass I made with out spinning. I would post some pictures but my computer is down, I'm using my phone for this.
Posted By: Otherlane
Re: 360-1 RP smallblock heads (Indy) ??? - 04/28/09 11:33 PM
If its the orange dart it awesome.So i came up with you should ran a 8.70?