The top ones are the JPricicion stage 2b heads to witch I am using, the second ones are the JPrecision stage 2 heads that haven't had the raised intake port . I was putting them up to compare the stud geometry .I talked to Julian at JPrecision yesterday and he said with how they placed the stud holes and the decking . the heads should bolt right up np.
Help me understand what you are doing.Those are like the the 99 heads i have sent in reworked decked so that I have 10.25:1 comp They fitted wiseco flat tops . 1.9 intake 1.585 exhaust they have raised the intake port 3/8 of an inch and milled and reworked the intake port and geometry of the studs so that the intake fits with the decking and the diffrent positioning of the intake manifold attachment . I told my Indi who sent them out that I was using the 37 to begin with because thats all I had and that I was going to a 57 and I like the power curve and position on the rpms for these cams next year. They reconfigure the and condition the bowl in the head as well . I would think the cc of those heads are some were under 85 cc so that I will have 10.25:1 static comp .As I pointed out in my previous post, the heads you plan to use are MVA, 110" or CVO ACR heads, all of which have either a 95cc or 98cc chamber volume and huge intake/exhaust valves; way too much head for a 95" motor. Unless the heads have been severely decked to the point where the intake manifold will not align with the intake ports, or the pistons have the correct dome of the size required which I don't believe exist, or some combination of decking and domed piston, you won't have to worry about detonation with the 37s because CCP will be about where it was in stock configuration as an 88"er,
I don't know what data you have been using in the BB calculator but those heads and your compression calculations don't add up.
I'm confused now lol . I sent in my heads oem to get done they work on those heads and the ones you mentioned .Maybe they just used those heads to show the raised intake port and the way they moved the geometry of the intake stud holes .??? I don't know . They set the heads I sent in which were 06 casting and raised the intake port and opened the intake to 1.70, 1.9 intake valve, 1.585 exhaust all AV&V. Decked for 10.25:1 comp with flat top pistons and manual comp releases . the guy that owns JPrecision owns AV&V In Quebec.That is what I have been told how they were setting up my heads. My Indi has used them for 20 years now .
Will do time is counting down . I have our 100 mile ride next weekend and I haven't heard if my jugs are back...OK, not confused now. You sent in '06 castings, so all is good; sorry I got wrapped around the axle.
It is possible to hit 100HP with 37s and good heads but I haven't seen it yet; close though mid to high 90s but I hope you hit the number. Don't worry about the heads, if setup as you describe and you get a decent tune, the motor should be snappy and fun to ride. At 9.5 corrected, the tune will be important. Let me know how it turns out.
The canned tune is for the se 204, I have done about 6 self tunes on this.
Thanks Dolt !Two, maybe three heat cycles for about 1 minute each allowing full cool down in between letting idle with a fan blowing on the motor just to check for leaks and listen for strange noises.
Set to auto tune and start riding but keep rpms under 4000. Find an access road or somewhere that you can run through 2-4 gear letting motor decal brake back down to about 2500, rinse and repeat for 10-12 cycles and when complete rings should be seated.
Do a compression test after the initial break in to check actual against calculated and record the number. Make adjustments to the map and continue to auto tune until all the cells are populated. When you get close to 1000 miles, get the bike on a dyno for a full and proper tune. Good luck.
well got my bike back together getting a compression tester for tonight, for after I seat the rings.
the heat cycles was under recomendation from my Indi .