The New Engine Is Finally Starting To Come Together

It's a 306 that's based on a Mexican block that's been partially filled with Hardblok. It uses a Boss 302 crank and rods, 0.200" dome Probe Twisted Wedge pistons, and a custom grind Comp solid cam measuring 242/254 @ 0.050" with a 110 lobe seperation. Compression ratio is 11 to 1, which will be on the edge for pump gas, but hopefully the aluminum heads and big cam will keep the detonation monster away.

Most of the parts have been on the shelf for quite a while. I dug up the recipt for the pistons, and it was dated 1996! The old engine just didn't seem to want to die. If I was starting 289/302 from scratch, you'd be looking at a 331ci stroker topped with a set of AFR 185 heads built inside a Boss 302 block! But the next engine will be a 351W stroked out to around 400ci. [img]/phpBB/images/smiles/icon_wink.gif[/img]

Here's a few pictures...







Here's a picture of a piston out of the old 289 headed engine. It's an old TRW #2249 forged unit that originally had a 0.400" dome that was cut down to around 0.040". The deck of the piston has also been cut down 0.060" to allow the use of longer 289 rods. This also raises the top ring... which isn't necessarily a good idea with significant doses of nitrous... [img]/phpBB/images/smiles/icon_smile.gif[/img]



Here's an embarrasing picture of the car anxiously awaiting a transplant... [img]/phpBB/images/smiles/icon_frown.gif[/img]



Hopefully it will be making some noise within the next month. [img]/phpBB/images/smiles/icon_biggrin.gif[/img]
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Yea and what kind of goodies are in those strange looking boxes so innocently left sitting on the fenders[img]/phpBB/images/smiles/icon_rolleyes.gif[/img]

Mike,

Lookin good there big guy....bet you will be glad to get in back running here soon....
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Better luck with the rest of the rebuild Mike, Glad to hear you finally got the SB together like it should be. Keep us posted on your progress and any info that might be interesting.[img]/phpBB/images/smiles/icon_smile.gif[/img]
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I'm glad to hear this Mike. What head is it going to have?

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Wheels up!

10.22 @ 132

<font size=-1>[ This Message was edited by: 85mike on 7/17/03 11:44pm ]</font>

The heads some of the first TFS Twisted Wedge heads made. I bought them back when they first came out. At the time, they were supposed to be some of the best stock exhaust port height units out. I've done a bit of work with the grinder... so we'll see what they're worth. [img]/phpBB/images/smiles/icon_wink.gif[/img]

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I guess I am dumb, or I missed something..mike,did you blow up the last 302?

JG
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I was towing the car on a dolley and got rear-ended by a chevelle buddy's 3/4 ton truck he was pulling his car with. It didn't hit SUPER hard. We were still able to go to the track, and I was still able to run a 10.65 with it... but had to listen to the track officials gripe about it spilling fuel out it's bent up gas cap on launch!

I came back from this last race of the year and decided to do some 'nitrous testing' on the street. I only had limited amounts of race fuel (some not that fresh) which I mixed a little av-gas with. This was not a smart Idea, as the pistons are not even ideal for nitrous... Short story, I broke the ring land off a piston. I removed that head and oil pan (in the car), machined another piston to fit, and put back together only to have it start knocking 30 seconds after firing it up. It turns out a piston on the other bank was on the verge of having a ring land break as well.

The lands were VERY thin near the vale notches. This was due to milling 0.060" off the piston tops and having their valve notches opened up.

The new pistons aren't like that.

It was a VERY 'suck-a-riffic' weekend. The frame has now been pulled out on a machine, but the bodywork still needs done... and the engine is well on it's way.

The car has been off the road almost two years, as three kids, tight finances, lack of motivation, etc. have taken their toll on 'reconstruction' time.

Hopefully it will roar to life in a month or so. I just need to degree the cam, do some finish up port work on one head, have a valve job done and complete the build.

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