Stock CI with 3.91 gears or 427ci stroker?
02-22-2008, 11:47 AM
#1
11 Second Club
Thread Starter
iTrader: (26)
Join Date: Apr 2007
Location: Oklahoma
Posts: 362
Likes: 0
Received 0 Likes
on
0 Posts
Stock CI with 3.91 gears or 427ci stroker? I am trying to decide which route to go. I want to choose the setup that will give me the best ETs. I have an 05 GTO and currently have the stock LS2 and many supporting go-fast mods. I was debating on whether or not to just stick with stock motor and add 3.91's or go with a stroked L92 427ci motor with all my bolt ons. I want the best ET's I can get, but also want good driveability on the street.
02-22-2008, 01:03 PM
#3
TECH Regular
Join Date: Nov 2006
Location: Westampton, NJ
Posts: 444
Likes: 0
Received 0 Likes
on
0 Posts
yea im gonna have to agree with this...gears are worth maybe a couple tenths in out cars and some MPH...i went 11.73 @ 118 with a best trap speed of 119.77 cam only. with heads i imagine it would run low low 11's and still be very streetable. This question though is like asking should i put a cold air intake or a supercharger....its all about your budget and how fast you want to go.
02-22-2008, 01:16 PM
#4
11 Second Club
Thread Starter
iTrader: (26)
Join Date: Apr 2007
Location: Oklahoma
Posts: 362
Likes: 0
Received 0 Likes
on
0 Posts
Well i'm looking at one of Texas Speeds L92 427 stroker short blocks. They are very reasonably priced and I have all the bolt-ons to go with one already. I would just have to sell my LS2 and a couple other things and I would be good to go. I think I'm gonna try to get rid of a few things and try to make the 427 happen.
02-22-2008, 02:18 PM
#6
Registered User
Join Date: Feb 2008
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
I would go with the L92 427 stroker short block if I were you. I am trying to decide if I want to add a new set of AFR Heads on my LS2 or save my money for a 427. I realize that I am only going to increase to about 500 RWHP (if that) and keep a NA engine. I currently have a CAI, 228/232 @ 112 LSA cam,double springs and pushrods, FAST Intake, 1 7/8" Kooks Headers w/cats to stock mufflers, and a custom tune. So if I contine to want to add more horsepower, there is no replacement for displacement. Like 99ssleeper said, this is probably a $10,000 expenditure to move to the 427 from where I am now. I believe the AFR heads installed are around $3,000.
I need to attend another 12 step meeting this week. It is an addiction!
I need to attend another 12 step meeting this week. It is an addiction!
02-22-2008, 02:45 PM
#7
11 Second Club
Thread Starter
iTrader: (26)
Join Date: Apr 2007
Location: Oklahoma
Posts: 362
Likes: 0
Received 0 Likes
on
0 Posts
lol..addiction is right. I have L92 heads and ported intake already and a Thunder racing stroker cam. I can sell the gears I already have, my LS2, old cam, and a couple other things and should be right where I need to be to buy the 427 short block. I think I'd be happier with the power it puts down. Plus it would be like having a brand new engine in my car.
Trending Topics
02-23-2008, 10:44 PM
#9
11 Second Club
Thread Starter
iTrader: (26)
Join Date: Apr 2007
Location: Oklahoma
Posts: 362
Likes: 0
Received 0 Likes
on
0 Posts
I have no idea what the LS2 is worth. I'm hoping to get between $1500-$2000 for the short block. But Honestly I just don't know. I know long blocks are going between $3-5k. You could piece together a full LS2 long block from a short block for cheaper than that I think.
02-24-2008, 02:01 PM
#12
This makes no since to me. The gears and a new motor are so far apart it's nuts. I don't know what your goals are but,I ran almost 10's all motor 346ci stock 3,700lbs weight with a head and cam package. A 150 shot got me 10.2's@134MPH. You don't need a 427ci to go fast.
02-25-2008, 12:10 AM
#15
11 Second Club
Thread Starter
iTrader: (26)
Join Date: Apr 2007
Location: Oklahoma
Posts: 362
Likes: 0
Received 0 Likes
on
0 Posts
My thoughts on it are now this... I weill go with the Stroker motor. Reasons for it are this. I drive a GTO that weighs 4100lbs with me in it. Gears for the GTO are $1200+ installed. I've got over 80k miles on my motor. So I could mod it us good, and look forward to a rebuild in the next 20-30k most likely. I could sell my gears, shortblock, and a couple other thins, and have the money for a Stroker short block. That makes the most since to me. I'd be starting with a fresh motor and probably have better track times and more reliability.
