Drew's Motor

[Hap Waldrop]

Well, I have not had much time to post here lately, but wanted to give a update on Drew's motor. The block,has been cleaned, bored .040" over, the line bore was right on the money, so that did not have to be done, the crankshaft, was pretty nice, after I magnafluxed it and straight check it for run out, I then polished it, and it turned out great and was able to stay standard/standard. The crankshaft was then balanced, from the factory it was 1.5 grams out on the front, and 4.4 grams out on the back, now it .6 grams on the front, and .5 grams on the rear. The connecting rods were then cleaned, bead blasted,, parting line cut on the Sunnen cap grinder, the new ARP rod bolts installed, then the big end sizes to my spec. Then the rods were balanced, from the factory the rods were out about 4 grams top and bottom, now the rods are all with +/- 1 grams, top, botom and total weight. The entire rotating asembly is blue printed from one end to the other, the rod and main clearences are set on .0015". The piston to clyinder wall clearence is .0025" to The AE21253 piston were good as far as balance right out of the box, all within 1 gram of each other, the pin bore as for clearence were all good as well. The next thing I'll do is check the gaps on the ring and adjust them as needed, then get the piston pressed on the rods. Here's some pics of Drew's motor in progress.

 

[Hap Waldrop]

Here's a picture of one of the connecting rods having it's big end weight checked.

 

[Hap Waldrop]

Here's one of the block awaiting all those all those nice prepped parts to be inserted into it.

 

[Hap Waldrop]

A little more about the recipe for this engine. I'm using AE 21253 psitons, instead of the AE21251 piston, because the AE21253 has a higher compression height, and with a skim ust on the head I can get to right under 10.0 to 1 on compression ratio. I'm using APT VP276 cam which is pretty much the same as the Kent MD276, I'm suning APT CF-04 chilled iron lifters as well. The cam David Anton ground for me is done off a late model Mini slot drive oil pump core ( of course we're using the later slot drive oil pump as well), then it's Ion nitrited after grinding, so the lifter and cam are both around 57-60 Rockwell C hardness range, right where you want to be, we'll be timing the cam with a Rollmaster adjustable vernier cam gear set. I'll be advancing the VP276 cam a few degrees to give Drew plenty of grunt. The head will be fully ported and polished. All ARP hardware thru out, everything balanced. This formula ought to net Drew a honest 100 hp.

 

[bugimike]

Boy, that sounds like a sweet package for Drew (must suppress the envy-monster !)! The pix are great. One of these years I will have to send one up to you (I play the lotto every week :crazy: !!)! I would LOVE to have 100 HP on tap in a BE!!

 

[Baz]

This formula ought to net Drew a honest 100 hp.

:shocked: :thumbsup:

 

[John Moore]

COOL! I love engine Porn!

 

[drooartz]

:banana: :banana: :banana:
<span style="font-style: italic">Drew does the happy dance!</span>

Thanks for the update, Hap. Hopefully this will get me motivated to get moving on the rest of the car! Lots still to do, but these pictures are a good shot in the old rear end to get going.

 

[Atrus]

Sounds b-e-a-uitful!

Not to be nosy, so please don't throw the exact price of Drew's out or anything, but what can one expect to have you do something like this, Hap? $4k? $5k?

 

[jlaird]

wow, oh wow.

Drew you one lucky guy. That is going to be just awsum.

 

[vagt6]

Hap is a bona-fide guru. :thumbsup:

Hap, will this engine run on pump gas (premium, I assume)???

 

[drooartz]

Not to be nosy, so please don't throw the exact price of Drew's out or anything, but what can one expect to have you do something like this, Hap? $4k? $5k?

No worries on being nosy -- this build will wind up being about $5000 plus shipping. Hap posted some info here when fellow BCFer Ray put in his order:

https://www.britishcarforum.com/bcforum/ubbthreads.php/topics/309691/Cool_job_for_me

I'm not set up to do a full rebuild myself, so I was looking at somewhere around $3500 or so to have it all done for me (that's for a mostly stock rebuild). After some discussion with Hap, I decided to do pretty much the same build as Ray.

I looked at it this way: I'm only going to do this once, so I figured it was worth doing it all the way. Besides, I had just decided to skip the 5-speed conversion (which costs about $1500 or so) so I had some extra money put aside already. I'm on a tight budget for the Tunebug, but this seemed to be the right place to spend extra. The cost difference wasn't that great anyways -- really, it's a bargain compared to what a performance build on a big (say Chevy/Ford V8) would cost.

 

[GB1]

Sounds great Drew/Hap

I had mine out yesterday for a little spin she puts out in the low 90, and what a monster.

Pat

 

[Atrus]

Cool, thanks Drew. Good to know. I am a little ways down the road from that one, but it's good to get a feel now. Either next summer or the summer after (I am thinking it'll end up being 2010). I want some drive time first!

 

[jlaird]

By this time, I hope, next year I will be up 20 HP or just under a 30% increase in HP.

No burnouts, just a better sound and of course a fun engine build.