kzr750r1

Well after spending a good chunk of the day on measuring pistons and bore, I'm ready for the next phase. Bores are flat even between each other and so are the pistons. Whew. Piston-Bore=Wall clearance" 3.918-3.921=-.003" and the target is met for my intended boost range. Now with that I will take the 3.921 bore x .005 to get target gap of .020". 16+ Lb boost would call for .006 as the multiplier. Little torn here. It would be nice to have a higher boost target on a stage 2 tune later down the road. If I was to go for 16+ on boost it would call for .004 more gap... But! Probably going to stick with the mild boost number regardless. I don't expect to get crazy on HP tunes.

Popped off two rings from one of the old pistons. Interesting the factory oil scraper (#2) is Napier style like the Total seal kit from Manley. There was a significant amount of burnt carbon caked on the inside edge. Came off easily enough with a rag, seems the latent oil from the case tear down was doing a good job peeling the old pistons. These will make good ashtrays. Even though I don't smoke cigarettes any more. Nice article about rings from Hotrod. http://www.hotrod.com/how-to/engine/hrdp-0910-piston-ring-tech/

Work sucked my life out of me last week. Case half's and rings are in the house right now. Going to pull a couple rings off the old pistons for gaping practice on the grinder. Should have the short block together by end of the month. Long Block if I'm lucky.

What you get for sticking your neck out sometimes.

Pan drop twice (Drive a little between drops) on a car after sitting a while will help pull the clutch debris out and refresh fluid. Jacking the passenger side nets additional fluid removal per drop. After doing this your going to replace almost 10q+ of fluid.

Grinder was on the doorstep today... I already need to mod it. Pretty sloppy setup. I'll make it better.

Thanks guys. Have a load of stuff to pull together, I'll keep ya'll in the loop.

Ordered this from Summit today. http://www.summitracing.com/parts/PRO-66785 Picked up an extra wheel as well just in case. Looking forward to getting the motor build back on track. Have the girl next weekend. Looking forward to hanging out with her. The two days I had with her early this week was too short. Surely will get some time off after so I can get this block back together.

Hmmmm.... Interesting.

Not understanding... The car was not ready or the new test system wasn't ready?

Unfortunately this is where I have stall for one full month. I will only have time to spend with my daughter before getting on the road for November. After Saturday I will have two days at home this month. All good cause I stack up some OT in the process and stoke the fire some more. Will be going full force in December. Nothing but fear and common sense to get in my way.

Some eye candy.

Was where I noticed it too. Especially driving up a grade.

Heads are done will pick them up today. I'm nowhere near ready to prep these gaps by hand with a file. Looking at a summit tool for about 50 bucks.

Doh! Glad I called. Instructions are clear. I'm not reading them right. Gap recommendation is BORE X .006" = .023" for medium boost application. Oil scraper is just Minimum .015 called out. No Max. Looks like I need to rig up a file in the vice and get to cutting these rings down .014 to .016". Crank and rods are assembled waiting for the rings to be prepped then I'll put this together.

Calling Manley in the morning... Make sure I get this control ring on the right way for one... Only marking is the TS3927 and there is a groove cut on the cylinder side. Looks to me like groove down. But must be sure. This would make the PN marking up. Second is these gaps. Just read through one thread on NASIOC pissing about Total Seal with one piston showing damage. Inconclusive why so far. Couldn't pipe into the conversation for some reason. Don't know the secret handshake.

Ok all bores measured 4 times each at 1" and 2" between 12 and 3 o clock positions. Pretty much any difference was .001 to .0005 at a average of 3.921" Pistons are 3.918". We have hit the .0035 to .004" average. Cool beans. Now the ring gap is a bit perplexing. Manley is calling for .005 to .0075"... Depending on boost for top and second ring. Oil Ring Rail spec is .015". I'm getting wider at 1" ish in the bore. Top .008 to .010 Second .010 Oil rings .015 to .017 top .027 to .029 It's almost like I have the wrong rings or I'm measuring at the wrong place... Will do it again at different depth midday tomorrow.

Good to hear your break in is over and running smooth fahr_side. Will be building the short block only this weekend. Exhaust Valves are questionable, punt on those IMO. Exhaust guides replaced, new exhaust valves on order. Should expect the heads back by Wednesday. Want to at minimum get them bolted to the short block before I disappear for a month.

Block is back, decked .005 ish and haven't checked their work on the bores yet. Need to do that and check ring gap. Heads are over at Robs Auto. Expectation is to time-sert all four spark plug hols at 25 bucks a piece. Heads will be back in my hands by the end of the week ready to install... Famous last words.

Robs auto off Industrial

Called and my block is going on the mill today. He sounded wanting for some information of what I have found so far. Job will be completed else ware. It's all going to be collected them paid for services rendered and moving on.

Ok, I have found another machine shop that works on Subaru heads every day. In Hayward as well. Will be going over to the east bay on Monday and collect my parts. Pay for the work completed and move on to the next shop.

Yeah. Boxkita dangled cosworth prepped heads in my face in another thread. Still have a couple calls to make today. I don't like it but may just run it like it is. Start scrimping for a built motor. In my searching finally found the answer to a question GT and I were discussing. He used a term of semi closed deck. Our motors are semi closed. But IMO that's marginal as it's only one more rib added to the casting. The Open deck heads must only go in NA motors.

Yeah but likely not any better prepared than who has it now. There is another shop in the east bay I'm going to call and talk to again. Cost was high but if they have seen these heads in the past would be better prepared to get me setup to assemble. Livermore Subaru new quote for PN 11039AB650 = $862 I can negotiate a 10% with the amount of parts I've purchased there. subarupartsonline = $560 Welding Specialist was inconclusive and would be pricey. Nice to talk to him again though. I hear what your saying fahr_side... Your in the 75% run it comments I find on other forums.

They are not Subaru guys. I'm going to let them deck the block and probably take the heads somewhere else. Your right this is taking too long.