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Posted by: orange914 Jul 2 2007, 12:26 AM

i'll be putting together a 2056 soon. with jakes 9050 cam can i run d-jet and 9.0:1 on pump gas with no problem?

can i be pointed to a thread on this set up proceedure?

Posted by: ConeDodger Jul 2 2007, 12:56 AM

Mike,
That information is on Jake's site under articles or tech articles... Deck height measurement should be the name of it.

Posted by: sean_v8_914 Jul 2 2007, 02:14 AM

first ya gota CC your heads
here's teh tuna can compression calculator
http://www.tunacan.net/t4/reference/engine-calc.xls

Posted by: Joe Ricard Jul 2 2007, 05:46 AM

Do the calculations and then order the shims you need.
http://users.erols.com/srweiss/calccr.htm

Posted by: blitZ Jul 2 2007, 06:21 AM

I have the same setup with the 9550 cam, assume that's the one you meant. It runs fine with 9:1 compression. I use 93 octane at Len's suggestion, he refurbished my heads.

Posted by: Joe Ricard Jul 2 2007, 07:50 AM

Well, great. Wonder how my motor will run with 10.4:1 compression on pump gas.

Big cam with lots of overlap and carbs should make it possible.


Anyway let us know what kind of deck hieght you obtain. Make sure they are all even (better than .005)

Posted by: ptravnic Jul 2 2007, 10:55 AM

This is a good example of why it is very important to take your time (which will be frustrating). Need the heads cc'd and deck height measured to determine which shims are needed to get the CR you desire.

After this is sorted and the right shiims are in and the heads are torqued down, it'll be time to start learning about rocker arm geometry. 911 swivel feet adjusters, adjustable push rod, cut to fit push rod's...

At first you (as I did) probably thought that once the parts arrive it's time to put it all together - maybe even in a day or a weekend BUT rarely does it happen that way.

Enjoy the process!

Posted by: Joe Ricard Jul 2 2007, 12:16 PM

That's why I decided to not take my car down till after Houston tour.
Now I have all summer to fiddle with my engine and car.
Too freaking hot to race in the Summer. However I do get to race the broom every once inawhile.

Posted by: Brando Jul 2 2007, 02:43 PM

55ccs on my 2.0 heads, case-to-cylinder mating surface just machined smooth, no shims my deck height came out to 0.03". Perfect for ~9.5:1 compression. Using 96mm P&Cs and Jake's 9550 cam. Also find out how many CCs if you've got domed or dished pistons.

Posted by: Joe Ricard Jul 2 2007, 03:07 PM

So Brando you were able to get exactly .030 on all 4 cylinders?
Damn that's good. I was the same on each side, but varied .002 left side to right side.

Posted by: Brando Jul 2 2007, 03:14 PM

I was amazed when I checked... I guess I got lucky for a Rimco rebuild LOL.

Posted by: Joe Ricard Jul 2 2007, 04:22 PM

I suppose if you had the case decked you may very well came out with good numbers.

I had to swap rods and pistons and cylinders a few times to get mine.

Nothin in mine is stock anymore.
Ok the valve cover bails are stock. and the push rod tubes which will have to be shimmed.

Posted by: orange914 Jul 3 2007, 12:20 AM

just recently turned to that site, good stuff, thanks

Posted by: orange914 Jul 3 2007, 12:23 AM

these are 039 heads len did for a motor jake but didnt build. i'm sure he knows the cc, i'll be asking him as soon as i can get hold of him.

thanks for the link

Posted by: orange914 Jul 3 2007, 12:24 AM

are you running d-jet? any problems?

Posted by: orange914 Jul 3 2007, 12:28 AM

thanks, i wont rush the build. just learning alot and trying to acumulate the right parts. lots to do

you now, hurry up -n- wait

Posted by: orange914 Jul 3 2007, 12:32 AM

the 914 unfortunately dropped a valve at the worse timing. kenny's high school is having a big fund raiser car show on sept. 22nd AND my wife and i are a big part of pta making it happen

Posted by: orange914 Jul 3 2007, 12:34 AM

same exact 2056 for me. i have flat top. are yours...? how does it run on i'm assuming 93 octane? carb.s?

Posted by: blitZ Jul 3 2007, 06:42 AM

Yes, running the original d-jet with no problems. You may need to tweak your MPS. I installed a CHT gauge, the heads stay fairly cool.

Posted by: ptravnic Jul 3 2007, 08:37 AM

Original Djet based off the 1.7L stock system or 2.0L stock system? Coupla differences between the two (ie injectors).