Chevy 400 engine stock compression ratio
WebApr 22, 2024 · The standard recommendation for street engines running on pump gas has always been to shoot for a 9.0:1 to perhaps 9.5:1 compression ratio. This is in order for … WebMay 26, 2024 · Lat year I ran a dished piston 400 with a set of 64 cc Vortec heads and the compression was right around 9.8 to 1 ran great on pump gas and pulled off a 12.26@106mph with no work other than a valve job to the heads. Sounds about perfect 🤩 I too ran a 400 sb with dished pistons and 64 cc old Chevy heads. I loved that motor!
Chevy 400 engine stock compression ratio
Did you know?
WebDec 6, 2008 · What pistons are in the "recently rebuilt small block 400" ?? Stock type 12cc dished w/58cc heads get's you around 11.6:1 compression ratio. Don't know mike. All I know is this guy my son knows had this pickup with the 400 in it. It started smoking so he had it gone through by someone????? don't know who. WebMar 8, 2024 · ok i have a 400 sbc standard bore with stock gm dished pistons, casting number is 3951511 and head casting number is 3973493 its a 76cc head.. what is my compression ratio?? im putting a 67 cc brodix race rite head.with a fel pro #1044 head …
WebThe bore of the 400 is 4.125 inches, which is larger than the 350’s 4-inch bore. The 350 has a stroke length of 3.48 inches while the 400’s is 3.75 inches. Moreover, the crankshaft of … WebFeb 18, 2008 · A 383 builds compression a lot easier than a 350, it would be tough to get 175ish psi in a 350 flattop motor with 76cc heads and a [email protected] cam. I would bet that 350 has a smogger cam and flattop pistons. Edit, Importtech, I now see you were referring to your circle track motor. What CID is it? what exact cam are you running? I Importtech
WebMay 1, 2011 · With timing and jetting maximized, the 400 managed to produce 458 lb-ft of torque at a still low 4,000 rpm, while kicking up the peak horsepower to just 401 at 5,400 … WebApr 6, 2024 · Keep in mind that in 1969, 400 bucks was a lot more than it is today. A base model 1969 Camaro was right around $3,000, so adding another $700 for an engine was a big hit to the wallet. Fun fact ...
WebFeb 12, 2007 · Here are some numbers for you: 1970 400 2 bbl 9.0-1 compression 265 hp 400 ft lbs tq @2400 rpm. 1970 350 4bbl 10.25-1 compression 300 hp 380 ft lbs tq …
WebFeb 2, 2024 · The LQ9 is a 6.0L Gen. 3 small block engine used in GM trucks between 2002 and 2007. For marketing purposes, it was also known as the Vortec HO 6000 or VortecMAX. The information listed here is for … god says things because they are goodWebNov 18, 2011 · As a sequel to our ultralow-compression 400 from May we build a 406ci small-block Chevy that can make 501lb-ft of torque and 466hp on pump gas. - Car Craft Magazine News bookingsync.comWebRaising the Compression Ratio . By far, the best thing you can do to your engine is to raise the compression ratio. All of the 351M/400s came with 8.0 to 8.4 to 1 compression ratios (except for the 1971 400, which had … bookings your request can\\u0027t be completedWebSep 27, 2024 · With a common, four-eyebrow flat top piston and a .041-inch thick head gasket on a 350ci engine, the Vortec head will bump the compression to around 9.5:1 depending upon the deck height. There are other, smaller points that are important to know because they affect cam selection. booking sydney cbdWebSep 4, 2024 · With a stock piston, we’ll assume the piston is 0.020-inch down from the deck, which is a common situation with ‘70s engines. With a steel shim head gasket and assuming 4cc in the piston valve reliefs, the compression for a 64cc head is 9.52:1 while the 67cc head is slightly lower at 9.2:1. god says vengeance is mineWebJul 3, 2024 · Squigie. Registered. Joined Aug 22, 2015. 1,517 Posts. Discussion Starter · #1 · Jul 2, 2024. I FINALLY tore down the SBC 400 that came with the '70 4-door, and found that it's actually a 2-bolt main version with thicker webs. (Rather than the 'thin web' 4-bolt I had assumed it was.) It can actually handle some power. It needs to be bored. booking sydney australia hotelsWebMay 25, 2006 · you'll have to put some cam in there to get the cyl pressure back down to acceptable. a stock cam with 10.5-11.0 compression just won't cut it. bye bye head gaskets. or lots of octane needed. check the block deck for flatness also,, when you check the heads for warp. look for cracks from the bolt holes in the block deck over into the … bookingsync prix