Jason's "built" D24T engine build

cuaz64 · #1 06-23-2010, 05:59 PM

Interesting Build. Good Luck!

Jason · #2 06-24-2010, 05:49 AM

Thanks... Hopefull it puts down some power. I got the head apart all the way last night... Quite a bit of room for improvement in the ports. Hopefully the port and polish job will help extract some more power out of it.

Jason

Slobodan · #3 06-24-2010, 09:33 PM

Jason, you are doing some kickass stuff. Keep up the good work, I can't wait to see how it turns out for you, the port and polish.

Jason · #4 06-25-2010, 04:40 AM

Thanks!

Wish I had a flow bench at work to see before and after... There is a guy on vwdiesel.net that had his head done, (for a 1.6 build) and it was flowed. They got a pretty sizeable increase in flow out of it. I'm not quite that worried about it to pay to have it flowed though. I've done plenty of head work, I know there will be an improvement.

Jason

Jason · #5 06-25-2010, 07:28 PM

Here's a couple pics of the head. Just finnished the port and polish job tonight. Didn't get real crazy with it, just smoothed out the casting lines in the ports, and mostly cleaned up the material under the valve seats. All the ports had a sharp edge from the seat pocket being cut. The exhausts were worse than the intakes interestingly. I removed the ridge around those areas and blended from the seat into the port. Kinda hard to see in the pics, the camera flash really doesn't get down into the port very well. As you can see in the last pic, the head is all cleaned up, and now ready for the new guides to be installed. Its getting all new guides, and a 3 angle valve job next! As Alex likes to say, its my thousand dollar racing head...lol

The exhaust port in the one pic looks all out of shape... its how the light is hitting it, I was trying to get close to the intake port as you can see down it the best with the camera flash. I took at least 10 pics and they all sucked.

Jason · #6 06-29-2010, 07:15 PM

Head update: I installed all 12 guides and reamed them. The head is now getting the 3 angle valve job and should be done by the end of the week.

I just ordered piston rings today, and hope to assemble the short block this weekend if the rings show up. I still need to order a water pump, a couple misc gaskets and the head studs.

The project may take a little break as I don't really have the $$ for the studs. I just got married and we paid for the wedding. Kinda put a drain on the finances!

Jason

v8volvo · #7 06-29-2010, 11:54 PM

Congrats on the wedding!

Assume you are going oversize on the pistons... What kind of rings are you going to use? Just the standard Mahle stuff, or whatever comes on the pistons? Or have you considered using Total Seal rings? I looked into them at one point and decided against it due to expense but it might be worth considering for an engine that is going to put down a lot of power.

Also I would be sure to use a proper quality water pump, not a GMB, so that you are moving enough coolant to keep it cool. RockAuto sells Bosch pumps that are actually excellent quality. We ordered one and it turned out even nicer than the OEM-quality Graf I got from Tom. Nice smooth impeller casting, better than the Graf, and the Graf was good too. I would use a Bosch next time.

You might also considering sending your rods to Tom and having him set you up with a matched set of rods and pistons. There is a fair amount of variation in length and weight for rod+piston assemblies which can cause differences in compression between cylinders, difficulty selecting a headgasket thickness, etc. Tom has a massive collection and can make you a set of 6 that are matched for closest possible length and weight. If you are going to the trouble of building a nice motor I would do this to give it that extra little bit of smoothness and flexibility.

verdigo · #8 06-30-2010, 06:09 PM

Quote:

Originally Posted by Jason

Head update: I installed all 12 guides and reamed them. The head is now getting the 3 angle valve job and should be done by the end of the week.

I just ordered piston rings today, and hope to assemble the short block this weekend if the rings show up. I still need to order a water pump, a couple misc gaskets and the head studs.

The project may take a little break as I don't really have the $$ for the studs. I just got married and we paid for the wedding. Kinda put a drain on the finances!

Jason

My head has had a previousy line bore job. Damn thing has cam bearings. Im gonna have to use my NA head.