When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Dyno'd the street engine for my 4th gen Firebird earlier this week.
427ci LS3 (4.070 x 4.100), 11.5:1 - prepped by HKE and myself
LS3 heads done by AirFlow Development (Dennis Wheet)
Holley Hi Ram also done by AFD, 102mm NW TB.
Cam Motion solid roller, Jesel/Morel valvetrain
Kooks 2" primary headers. (Tiny 3" collector, being changed)
Moroso vacuum pump (8-9"~ of vac, being fixed and increasing to 16"~)
Bigstuff 3 COP
Has another 30hp+ in it easily, dynoing again in a few weeks after some minor fixes. Not bad for a OEM head/block deal.
Badass build!! Is the car go be a automatic or a 6 speed? Compression looks very pump gas friendly by the way.... must plan on seeing a lot of street duty ?
Badass build!! Is the car go be a automatic or a 6 speed? Compression looks very pump gas friendly by the way.... must plan on seeing a lot of street duty ?
Car is TH400, but it would be tons of fun with a t56. And yes will be on the street a good bit.
Nice power, Jon. Do you plan to try and extend the peak HP RPM anymore since you have solid lifters?
Yeah I was surprised the HP peaked as low as it did, valvetrain is good for alot more RPM so it would be neat to try..... Not sure that I'm going to make any big changes to shift the power up though.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
427" LS3 Engine Dyno Results 
