What should i expect? is it worth it? Fast 102lsxr
04-30-2010, 04:36 AM
#1
TECH Addict
Thread Starter
iTrader: (28)
Join Date: Sep 2008
Location: Deer park
Posts: 2,258
Likes: 0
Received 0 Likes
on
0 Posts
What should i expect? is it worth it? Fast 102lsxr ok guys here is what i have
stock ls1 shortblock
Prc stage 2.5 5.3 heads
torquer 3 231/234
lt's
ud pulley
3600 circle D
410's
Sd tune
stock Ls1 intake
stock injectors
now i am upgrading my converter to a 4400 circle D and i was also thinking of moving up to a ms3. i have ran a best of 7.26 the way it sits with my injector duty cyle way over 100%, my question is... what kind of gains will i see with the fast 102/102 lsxr and 42lb injectors and is it worth the 1500$ that im going to spend? i know my stock intake is holding me back quiet a bit being that guys are gaining 2-3 tenths going from a ls6 to fast 92 and im wanting to purchase the 102 which is suppose to be an additional 10rwhp over the 92.
3600 to 4400 converter
stock injectors to 42lbers
stock ls1 intake to Fast lsxr 102/102
231/234 to 236/242
im wanting 7.26's down to 6.80-6.90 with a 1.42-1.46 60'... am i asking for a little too much? or does this sounds reasonable?
stock ls1 shortblock
Prc stage 2.5 5.3 heads
torquer 3 231/234
lt's
ud pulley
3600 circle D
410's
Sd tune
stock Ls1 intake
stock injectors
now i am upgrading my converter to a 4400 circle D and i was also thinking of moving up to a ms3. i have ran a best of 7.26 the way it sits with my injector duty cyle way over 100%, my question is... what kind of gains will i see with the fast 102/102 lsxr and 42lb injectors and is it worth the 1500$ that im going to spend? i know my stock intake is holding me back quiet a bit being that guys are gaining 2-3 tenths going from a ls6 to fast 92 and im wanting to purchase the 102 which is suppose to be an additional 10rwhp over the 92.
3600 to 4400 converter
stock injectors to 42lbers
stock ls1 intake to Fast lsxr 102/102
231/234 to 236/242
im wanting 7.26's down to 6.80-6.90 with a 1.42-1.46 60'... am i asking for a little too much? or does this sounds reasonable?
04-30-2010, 04:31 PM
#8
TECH Addict
Thread Starter
iTrader: (28)
Join Date: Sep 2008
Location: Deer park
Posts: 2,258
Likes: 0
Received 0 Likes
on
0 Posts
ohh yea. i thought they didnt make them anymore because they dont make the 92 intake. do you guys think this 102 is actually better then the 92? why would they discontinue it if it was going to perform worse on a heads cam ls1
04-30-2010, 04:44 PM
#9
The intake doesn't perform worse, it performs better. FAST says the 102mm intake is 3-4hp better over the old 92mm intake. Independent dyno graphs seems to show 5-10hp.
They still make the 92mm throttle body to give you the option, if you do not need the 102mm capability. You need the smallest throttle body needed to supply air to you cylinders/runners. You will be better off with a 92mm. You wont see a much of a gain with a 102mm TB, but it'll look cool.
If you do opt for a 102mm, I would seriously look at the FAST vs. cheaper ones. My brother has one and after looking at it they included a very small bump on the bottom to help retain driveability. The cheaper ones Ive seen do not have this.
They still make the 92mm throttle body to give you the option, if you do not need the 102mm capability. You need the smallest throttle body needed to supply air to you cylinders/runners. You will be better off with a 92mm. You wont see a much of a gain with a 102mm TB, but it'll look cool.
If you do opt for a 102mm, I would seriously look at the FAST vs. cheaper ones. My brother has one and after looking at it they included a very small bump on the bottom to help retain driveability. The cheaper ones Ive seen do not have this.
04-30-2010, 05:26 PM
#10
TECH Addict
Thread Starter
iTrader: (28)
Join Date: Sep 2008
Location: Deer park
Posts: 2,258
Likes: 0
Received 0 Likes
on
0 Posts
The intake doesn't perform worse, it performs better. FAST says the 102mm intake is 3-4hp better over the old 92mm intake. Independent dyno graphs seems to show 5-10hp.
They still make the 92mm throttle body to give you the option, if you do not need the 102mm capability. You need the smallest throttle body needed to supply air to you cylinders/runners. You will be better off with a 92mm. You wont see a much of a gain with a 102mm TB, but it'll look cool.
If you do opt for a 102mm, I would seriously look at the FAST vs. cheaper ones. My brother has one and after looking at it they included a very small bump on the bottom to help retain driveability. The cheaper ones Ive seen do not have this.
They still make the 92mm throttle body to give you the option, if you do not need the 102mm capability. You need the smallest throttle body needed to supply air to you cylinders/runners. You will be better off with a 92mm. You wont see a much of a gain with a 102mm TB, but it'll look cool.
If you do opt for a 102mm, I would seriously look at the FAST vs. cheaper ones. My brother has one and after looking at it they included a very small bump on the bottom to help retain driveability. The cheaper ones Ive seen do not have this.
04-30-2010, 09:53 PM
#13
TECH Addict
Thread Starter
iTrader: (28)
Join Date: Sep 2008
Location: Deer park
Posts: 2,258
Likes: 0
Received 0 Likes
on
0 Posts
i hope not. this guy gained 33 rwhp going to a fast 85 https://ls1tech.com/forums/dynamomet...l#post13265194
for only a 20rwhp gain i would just buy the fast 85/85 from the classifieds for 600 instead of spending 1400.
for only a 20rwhp gain i would just buy the fast 85/85 from the classifieds for 600 instead of spending 1400.
05-04-2010, 02:36 AM
#16
TECH Resident
102 is definately better than a ls1 or an ls6..but on a H/c motor it might be a little overkill...but on topic i think a 102 would be worth about 20-30 hp over an ls1 intake..
05-05-2010, 12:23 AM
#19
Regarding the newest/biggest FAST intake, I spoke with someone today that recently installed a 102/102 setup on their LS1, and they mentioned it was so big they actually had to grind a bit off the top of their waterpump to gain enough clearance to seat it.