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Another build thread + Racing Updates

Magnethead

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Have an update for my engine but I'll relay that when I have more info to give.

Took the dragster out yesterday. Was basically a waste of time. But transmission seems to work with all the changes we made, and new camera+mount works.




 

Magnethead

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Got the lifters back from Bullet today for the truck. Hopefully that project can get refinished soon.

Took the dragster out on Saturday. It went too fast the first run (1000 ft planned shutoff), so I slowed it down a little and it was still too fast.

We have a race in 2 weeks in Belle Rose, Louisiana (Baton Rouge) and we have to slow this thing down to 6.12-6.15 in the 1/4 by the time we get there...Going to short-shift, knock ALOT of timing out, and keep that timing out until the 1/8 mile.....like, damn!

https://photos.app.goo.gl/cr4PfzaQttSpTrJt8








 

Magnethead

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Purchased the throttle body yesterday. Also did some math.

The charge piping will be 3" aluminum.

Four 1-¾" throttle blades = 3.5 square inches
Four 1-¾"x¼" throttle shafts = 1.75 square inches
Total Flowing Surface Area = 1.75 square inches

Four 2-¼" throttle blades = 4.5 square inches
Four 2-¼"x¼" throttle shafts = 2.25 square inches
Total Flowing Surface Area = 2.25 square inches

Half a square inch doesn't seem like alot, but trying to squeeze air from a 3" pipe through an equivalently 2.25" pipe (or even 1.75") is still quite the restriction.
But with a manifold that is almost 4500 sized and needs the raised mounting surface anyways.... Why not?

Stock air hat is 3.5" tall.
New hat is 5.5" tall.

Keg is 8.25" tall
M1 is 7" tall

Stock TB is 1.5" tall
4500 TB is 2" tall

So according to that math, I should only be 1.25" taller than a stock setup. That should easily clear the stock hood I think?
 

Magnethead

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Went down to Belle Rose, Louisiana last weekend. South side of Baton Rouge, in the middle of exactly nowhere.

Qualified #1 in Q3 with a perfect 6.100 on the 6.10 index at 231 MPH. #2 qualifier ran the pair behind us, 6.101 at 206 MPH (coasting).

Due to the short field, we had a ladder-bye in round 2. "Woulda, shoulda, coulda, didn't" set us up for a round 3 loss.







 

Magnethead

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At least we have some super-solid notes for Houston next week, which will be the start of 3 weekends back-to-back-to-back. The sea-level air just throws us for a loop in these cold months. Now we know what weather factors to pay alot of attention to.
 

Magnethead

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Nice job Mag.:cool:
We went 6.100 at 231MPH (roots). Jim went 6.101 at 206 MPH lifting at the 1000 (procharged). The class parity is rediculous. Bunch of guys are running high gear only - Exner went 3.96 with his procharger on a high gear leave (we went 3.97 on the 6.100 run). It's A-fuel but with boost at this point. Gotta love index racing.
 

Magnethead

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Alot of news happened today. NHRA event next weekend got cancelled. The 2 weekends after that are TBD but the prospects aren't good.

Procharger came in yesterday. Manifold got machined today.

Took a 4150 manifold and made this behemoth Accufab 4500 throttle body fit into it with some help from PDH Precision Engineering , then chipped away quite a bit of material to flow ALL the air with minimal restriction and also open up the plenum volume a bit. Still need to clean up the transition into the runners.
































 

Magnethead

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This update will comprise of two posts to split the photo count...

Got the new lifter from Bullet this week. Pulled the head off and replaced the lifter yesterday and FINALLY have 16 oiling rocker arms. What a cluster that was.

I still need to grind away alot of material on the intake manifold. The exhaust port plates also need some massaging. I also have a LOOONG shopping list.

Once the manifold has been cleaned up inside, I'll put the injectors and fuel rails on.

Setting the distributor drive gear was a little fun. It took 3 tries but I finally got it in the right place.

https://photos.app.goo.gl/Aj3vWi8FqNpMViW36



https://photos.app.goo.gl/SmaovCbr4yTfQUsF6



https://photos.app.goo.gl/q7sAsXvEX2c6ppq78



https://photos.app.goo.gl/KQGm8U1ChMLGg1eH9



https://photos.app.goo.gl/LvBVHcBf32uFfW1X9



https://photos.app.goo.gl/xgFySLFRdvUorJvh6



https://photos.app.goo.gl/69uLWo7QJxsvN49t9



https://photos.app.goo.gl/v9B3m2sQGu6VbjiT9



https://photos.app.goo.gl/p7XXrNoqn1syC4qJ9



https://photos.app.goo.gl/85Ej3Az6zj2q5Fgo9

 
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