Powerplants > Olds Powered
Final Olds 403
olds403:
All
I lied....I am doing one more. This will be a maxed out 403. It will go in my brother’s Trans am.
The computer dyno says 550Hp for all you haters. You know my LS Olds did 509hp on gas. Video posted and have the print outs. One nasty motor
This will be one sick 403. 330 custom crank, Molinar rods, Racetec custom pistons, Wilson custom RPMintake, Wilson Throttle body and AEM ignition. There is only one 403 in existence that I know that has made more HP than this last one will make. For all the haters since 1985......Video will be posted. the OLDS403
Wallington:
Awesome.....one problem, you can't give your brother a better 403! So....2nd last ever!
Not familiar with the Wilson items. Will he be using a drop-base of sorts, stock air cleaner base, fixed shaker?
Sent you an email as well about 200-4R....probably in junk folder!
5th T/A:
Olds 403,
I am not a doubter or hater. Back in the early 70’s I had a few friends with 442’s that were built and ran very well. But never got any dyno numbers. Impressive dyno numbers on your latest build, I would imagine it has tons of torque too. If you can please post the dyno sheet.
Thanks for sharing!
olds403:
Everyone hates the 403. Just like the 301 haters. All jokes aside.
Waiting on cometics head gaskets. Then dyno.
Wilson modified the Rpm intake for fuel rails and hogged out the middle. using their throttle body on AEM computer.
The rpm is 2inches taller. The wilson body is about like a qjet height
Will use a 400/455 pontiac air cleaner and a 400/455 shaker ring on a shaker body.
That is the trick to make it work. I do have two custom drops that works too - pro-touring Fbody made them for me
Not a coil on plug motor. Using the computer for fuel control and msd box for ignition.
https://www.wilsonmanifolds.com/collections/4-barrel/products/4150-throttle-body-1287-cfm
pg79ta:
I know it’s an old thread but ….. I have a 403 . Now stroker 424 330 crank , halo girdle 10.6 -1 . Rpm intake . Roller cam 528 lift 233/238 duration 7a heads ported and reworked bb size ports . Harland sharp rockers balanced . Etc without going nuts best guess for how car is now waiting for spring
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