Twin Turbo Skylark 350 Progress by sean Buick 76

By diyauto
( 2 )

6 minute(s) of a 265 minute read

4-25-2016

Well some good news from Blake who has my old car! He put it on the chassis dyno today and it made 460 HP and 460 TQ at the wheels with max RPM limited to 5500 RPM! There was some tire spin so there is a lot more left in the combo and this was at 10 PSI of boost. The engine in the car is a fresh build with 74 rods, TRW 30 over forged pistons, and ARP studs in the mains, No fancy parts. The cam is a used poston 114 and the heads are fresh but almost stock 71 versions with stock valves and a little bit of home porting done. X factor alum intake, and blow through carb.

The car has a 3.42 gear, 200R4 trans and hauls down the highway at 100 MPH like its nothing... All steel, about 3900 Pounds, full street car setup. I will post pics and video when I get it!



I see your point, but here is the scoop!

I have a publishing deal for a book about Buick 350 engines, so I need to break the world record for Buick 350 HP and build the best one around.

I will have the dyno testing done naturally aspirated once the alum heads are ported, and with a custom turbo camshaft.

Mark Burton is building me a single kit to use with both of these turbos on the engine dyno (ran separately) so that we can see what it does for power.




Then I will drop it in the car and run it on low boost to see 10.00.

Because I have this publishing deal I need the best of the best, I need the cutting edge parts such as the girdle, the billet crank, etc etc. I want to show what the Buick 350 can really do and I want it to be reliable...

Reading many books about max effort engines, I found that many good engines go bad due to a crankshaft that flexes and causes bearing and block issues... There was a crank failure recently that spooked me into the billet crank, better safe than sorry....

Weaker parts can be good for a while, and maybe a long while but you never know when they will give up.


5/1/2016

More pics!













5/4/16

Some pics of my engine coming together. I plan to use my belt driven oil pump but I wanted to be able to use the stock setup if I wanted to for some reason down the road:








5/6/16

Dragged home another cool chevy truck... 383 stroker, 5 speed, swapped the starter out and now it runs great!







Much lower than my daily driver truck:



Pulled my friends vette out of my trailer so I can put my stepside in there...







5/16/16

Got my tires mounted and balanced, these are for dyno use only so I don't trash my drag tires on the rollers:

15X12 Steel rim with 295/50R15 BFG Notice how I used a nice wide rim to make a really wide flat contact patch... Put these on some 15X8 rims and you get far less contact patch:






6/15/16

$200 got me a running parts car:





It's too bad it sat in a field so long the frame is rusted out. Glass is good, engine is good, trans was rebuilt before it was parked, even came with a nice rear bumper and two new quarter panels... I was surprised to get it so cheep!



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