High compression with turbo questions
01-14-2013, 01:14 PM
#21
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Id pick a different cam to run. The LS9 cam is gonna create a **** ton of dynamic and the thing has negative 22.5 degrees of overlap at .050.
A cam with the proper valve events will bring the dynamic down a touch and widen your tuning window when it comes to timing.
If you dont change it. Ill be surprised if you get 14 degrees in it.
The reality of it is..we put the static in it so we can run the big cams to get the cylinder filled as much as possible and still create a ton of cylinder pressure.
High compression with a small cam that has no overlap is gonna make for a overly sensitive motor on the tuneup.
A cam with the proper valve events will bring the dynamic down a touch and widen your tuning window when it comes to timing.
If you dont change it. Ill be surprised if you get 14 degrees in it.
The reality of it is..we put the static in it so we can run the big cams to get the cylinder filled as much as possible and still create a ton of cylinder pressure.
High compression with a small cam that has no overlap is gonna make for a overly sensitive motor on the tuneup.
Any cam suggestions that don't cost the usual 400 my buddy has a ms3 for cheap and stock ls1 and a stock ls6 cam?
01-14-2013, 01:19 PM
#22
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I would run something bigger then 100lb injectors. I was on E85 on my 5.3l (317 heads), aeromotive 340lph stealth (badass and quiet) and 18 psi at 19 degrees of timing and with 120lb lucas injectors I was already at 78% duty cycle@ 58psi fuel pressure.
However I NEVER saw knock. I took timing to 21 degrees and leaned it out to 12.5:1 AFR and no knock and one point it went to 13.2:1 AFR and still logs showed no knock. Car pulled sooo hard I felt like my ***** went back in my gut.
Now im on pump gas with 14psi @ 21 degrees of timing at 11.2:1 AFR and no signs of knock. However I have other kinks to finish.
I think with E85 at 12psi from a 76mm you will net 600whp easy, I dont know that much about valve events but I know Liljohn knows what he's talking about. Is this 370ci block?
However I NEVER saw knock. I took timing to 21 degrees and leaned it out to 12.5:1 AFR and no knock and one point it went to 13.2:1 AFR and still logs showed no knock. Car pulled sooo hard I felt like my ***** went back in my gut.
Now im on pump gas with 14psi @ 21 degrees of timing at 11.2:1 AFR and no signs of knock. However I have other kinks to finish.
I think with E85 at 12psi from a 76mm you will net 600whp easy, I dont know that much about valve events but I know Liljohn knows what he's talking about. Is this 370ci block?
01-14-2013, 01:41 PM
#24
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Well I am not trying to spend a **** ton of money on this setup since it wont probably last too long , so if I spend 400 on a cam ill just buy my nitrous cam and spray it with the 200
01-14-2013, 02:11 PM
#25
PM Automagic LS1...
He just pulled an older MTI R1 out of his motor thats 232/236 114+4 iirc.
Itd be a good one to use since youre building this as a throw away type motor.
Prolly get it for half the price of new.
What turbo are you looking to run?
He just pulled an older MTI R1 out of his motor thats 232/236 114+4 iirc.
Itd be a good one to use since youre building this as a throw away type motor.
Prolly get it for half the price of new.
What turbo are you looking to run?
01-14-2013, 04:46 PM
#30
01-14-2013, 07:33 PM
#32
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Well I can't find anyone who has or makes a hot side for under 2300
So if that is the only thing I can find no turbo for me. my original plan on making hits use won't work. G#d d@mn it
So if that is the only thing I can find no turbo for me. my original plan on making hits use won't work. G#d d@mn it
01-14-2013, 07:33 PM
#33
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Well I can't find anyone who has or makes a hot side for under 2300
So if that is the only thing I can find no turbo for me. my original plan on making hits use won't work. G#d d@mn it
So if that is the only thing I can find no turbo for me. my original plan on making hits use won't work. G#d d@mn it
01-14-2013, 08:06 PM
#35
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Everybody and their mother out by me has a procharger I would much rather slit my wrist vertically than do that
Last edited by 370cidZ06; 01-14-2013 at 09:00 PM.
01-14-2013, 10:44 PM
#36
TECH Resident
https://ls1tech.com/forums/forced-in...ls-photos.html
First post says, "under $1999"
Good Luck.
01-15-2013, 08:45 AM
#37
Considering guys run stock 5.3's and 6.0's on 20 psi I would consider 25 minimal in my book.
I have an OFI hotside I can sell you for 2300. Its all stainless for a T6 and has never been used. Downpipe can be used with a stock k-member from what I'm told. I can get pics if you are interested.
I have an OFI hotside I can sell you for 2300. Its all stainless for a T6 and has never been used. Downpipe can be used with a stock k-member from what I'm told. I can get pics if you are interested.
