327 or 383
Thread Starter
Member
Joined: Jan 2001
Posts: 427
Likes: 0
From: Niceville, Fl USA
327 or 383
i want to mke some power and i would like you guy's opinions on which to go for....stroking my 305 or buying a 4 bolt main 350 and stroking it out to 383. what would be the advatages and disadvantages to each?
------------------
1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503
GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS
------------------
1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503
GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS
Moderator
Joined: Jul 1999
Posts: 17,265
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
The 305 stroked and .030 over is only 334 but has small cylinder bores. A 350 stroked and .030 is 383 but has larger cylinder bores. Both will have an increase in torque but the larger bore 350/383 will produce more HP.
The same stroker crank is used in both. You either find a 400 crank and have the mains turned down to fit in the 305/350 blocks or buy an aftermarket crank, balancer and flexplate.
Buy a 350/383. Trying to make power out of a 305 is the wrong way to go.
------------------
Follow my racing progress on Stephen's racing page
and check out the race car
87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season
Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662
Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association
87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley
The same stroker crank is used in both. You either find a 400 crank and have the mains turned down to fit in the 305/350 blocks or buy an aftermarket crank, balancer and flexplate.
Buy a 350/383. Trying to make power out of a 305 is the wrong way to go.
------------------
Follow my racing progress on Stephen's racing page
and check out the race car
87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season
Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662
Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association
87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley
Thread
Thread Starter
Forum
Replies
Last Post
LT1Formula
Engine/Drivetrain/Suspension Parts for Sale
7
Oct 8, 2015 08:34 PM
