why dont I hear about LS7 swaps?
01-29-2012, 01:52 PM
#1
Race Director
Thread Starter
why dont I hear about LS7 swaps?
Just curious why I dont ever hear about anyone doing LS7 swaps here.
I hear about 5.3 l iron block ls1 truck motor swaps, but not LS7 swaps.
Is there some reason? like is there something about that motor that will make it never work in a c4 (ex. clearance?)
I hear about 5.3 l iron block ls1 truck motor swaps, but not LS7 swaps.
Is there some reason? like is there something about that motor that will make it never work in a c4 (ex. clearance?)
01-29-2012, 01:53 PM
#2
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St. Jude Donor '05
5.3 can be had on the cheap and still make big power.
Very few are willing to sink 10-15k into their 5k car
Very few are willing to sink 10-15k into their 5k car
01-29-2012, 02:05 PM
#3
Race Director
Thread Starter
I think the c4 is a great platform to buy for 5k and then mod the living crap out of it to compete/ beat the c5/c6's and their z-mods.
The only thing really holding someone back is the lack of aftermarket parts for c4's. But thats why I took a welding course 2 years ago so I could start making my own stuff and not rely on the aftermarket vendors that make so great stuff for c5/6's and nothing for our car. ECS is a great example. Great stuff for c5/6, nothing for us.
There are 8 second streetable c4's out there. Not as many as on the c5/6 site, but it is possible.
With enough money and motivation, anything is possible.
01-29-2012, 02:59 PM
#5
Le Mans Master
I would have gone with one if you gave it to me 
Seriously the price of an LS7 is twice the price of my entire swap budget. The little things creep creeping up on me.
Once the swap is done any LSX will work. Who is to say that those who have done a swap may not go with one when the price of aluminum is less than gold.
Seriously the price of an LS7 is twice the price of my entire swap budget. The little things creep creeping up on me.
Once the swap is done any LSX will work. Who is to say that those who have done a swap may not go with one when the price of aluminum is less than gold.
01-29-2012, 03:24 PM
#6
Race Director
Yeah...I've read about the issue of cost for an LS7. Is it completely different technology than the LS 1's, 2's, and 3's? If not, why couldn't you do the upgrades to the older platform...heads and cam? (You know...to create an LS7 vs buying one.)
Heads too different and/or costly?
Heads too different and/or costly?
01-29-2012, 04:02 PM
#7
Le Mans Master
Yeah...I've read about the issue of cost for an LS7. Is it completely different technology than the LS 1's, 2's, and 3's? If not, why couldn't you do the upgrades to the older platform...heads and cam? (You know...to create an LS7 vs buying one.)
Heads too different and/or costly?
Heads too different and/or costly?
The LS7 block itself is different I'm not sure how and its a dry sump system. The valves from what I understand would be too big for the LS1 bore. Now you got me thinking Iron 6.0 block with LS7 heads would kik butt.
LS1 - 346ci (5.7L)
LS2 - 364ci (6.0L)
LS3 - 378ci (6.2L)
LS7 - 427ci (7.0L)
Last edited by ch@0s; 01-29-2012 at 04:05 PM.
01-29-2012, 04:40 PM
#9
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Co-winner 2020 C4 of the Year - Modified
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Last time I started to show interest on the 383 stroker threads, The Ghost ended up with a 383.
I must ignore this thread fast.
I must ignore this thread fast.
01-29-2012, 04:41 PM
#10
Le Mans Master
I'm not sure about that but ck these out. I'm no expert Gregg
http://forums.corvetteforum.com/c6-t...lable-now.html
http://www.camaro5.com/forums/showthread.php?t=114671
http://forums.corvetteforum.com/c6-t...lable-now.html
http://www.camaro5.com/forums/showthread.php?t=114671
01-29-2012, 04:42 PM
#11
Le Mans Master
01-29-2012, 05:13 PM
#12
Race Director
Thread Starter
ch@0s.... you ever consider boosting that thing?
Itd be sweet to get somebody like greg@blowerworks to make a custom supercharger bracket (for a common supercharger model, like procharger d1-sc or the bigger vortech ysi) for c4's w a custom lsx swap...
Man, would that be a rush.
Itd be sweet to get somebody like greg@blowerworks to make a custom supercharger bracket (for a common supercharger model, like procharger d1-sc or the bigger vortech ysi) for c4's w a custom lsx swap...
Man, would that be a rush.
01-29-2012, 05:17 PM
#13
Race Director
Thread Starter
i read somewhere that LS7 heads flow 360 cfm@.600 lift.....stock !!!!
The guy at my dyno bought a 2008 z06 and it dyno'd 450 rwhp stock. He tore it apart for a cam swap and it put down 554 rwhp. I dont know the cam specs.
No other changes.... thats naturally aspirated.
other unique features: ...forged crank, titanium rods, not sure of valves are they titanium too?
its really an exotic motor!
The guy at my dyno bought a 2008 z06 and it dyno'd 450 rwhp stock. He tore it apart for a cam swap and it put down 554 rwhp. I dont know the cam specs.
No other changes.... thats naturally aspirated.
other unique features: ...forged crank, titanium rods, not sure of valves are they titanium too?
its really an exotic motor!
01-29-2012, 07:44 PM
#15
i read somewhere that LS7 heads flow 360 cfm@.600 lift.....stock !!!!
The guy at my dyno bought a 2008 z06 and it dyno'd 450 rwhp stock. He tore it apart for a cam swap and it put down 554 rwhp. I dont know the cam specs.
No other changes.... thats naturally aspirated.
other unique features: ...forged crank, titanium rods, not sure of valves are they titanium too?
its really an exotic motor!
The guy at my dyno bought a 2008 z06 and it dyno'd 450 rwhp stock. He tore it apart for a cam swap and it put down 554 rwhp. I dont know the cam specs.
No other changes.... thats naturally aspirated.
other unique features: ...forged crank, titanium rods, not sure of valves are they titanium too?
its really an exotic motor!
those heads also measure in around 270cc if memory is correct.
those LSx motors certainly have alot of potential, but i wouldnt call the motor exotic but it will hang with the exotics!
01-29-2012, 07:56 PM
#16
Melting Slicks
LS7's are quite a bit more expensive.
One factor that help me talk myself into the EROD LS3 swap was the CA Executive Order allowing it. At that time (last May) only the LS3 had an EO. There is an EO for the LS1 now, though, and the LS7 EO is coming.
Still too expensive for me (parts are the biggest part of my budget) but a smog legal LS7 would be awesome.
One factor that help me talk myself into the EROD LS3 swap was the CA Executive Order allowing it. At that time (last May) only the LS3 had an EO. There is an EO for the LS1 now, though, and the LS7 EO is coming.
Still too expensive for me (parts are the biggest part of my budget) but a smog legal LS7 would be awesome.
01-29-2012, 08:07 PM
#17
Pro
It has been done before, here is an interesting piece
http://www.erlperformance.com/gm-ls-...i-short-blocks
Why do a LS7 when you can build a serious
http://www.chevyhiperformance.com/te...d/viewall.html
http://www.erlperformance.com/gm-ls-...i-short-blocks
Why do a LS7 when you can build a serious
http://www.chevyhiperformance.com/te...d/viewall.html
Last edited by yedister; 01-29-2012 at 08:19 PM.
01-29-2012, 08:45 PM
#18
Le Mans Master
We have a bun in the oven.d
I did however see this today on Horsepower TV .. Future mod?
It has been done before, here is an interesting piece
http://www.erlperformance.com/gm-ls-...i-short-blocks
Why do a LS7 when you can build a serious
http://www.chevyhiperformance.com/te...d/viewall.html
http://www.erlperformance.com/gm-ls-...i-short-blocks
Why do a LS7 when you can build a serious
http://www.chevyhiperformance.com/te...d/viewall.html
Last edited by ch@0s; 01-29-2012 at 09:01 PM.
01-29-2012, 09:44 PM
#19
Suckin' gas, haulin' ass.
Member Since: Apr 2010
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As stated above, I would do an LS2 with L92 (LS3) heads and an LS3 intake. With a mild cam (very streetable) you would put down 460 RWHP.
I think this is the very direction I'm going to go on my 07 CTS-V, eventually.
The reason you can't put L92 heads on an LS1 or LS6 is because of valve shrouding. The 4" bore of the LS2, LS3, etc. won't shroud the valves. I hear there is a rectangle port head made for the 3.9" bore of LS1 and LS6 engines, but it doesn't flow as well.
I think this is the very direction I'm going to go on my 07 CTS-V, eventually.
The reason you can't put L92 heads on an LS1 or LS6 is because of valve shrouding. The 4" bore of the LS2, LS3, etc. won't shroud the valves. I hear there is a rectangle port head made for the 3.9" bore of LS1 and LS6 engines, but it doesn't flow as well.
01-29-2012, 10:32 PM
#20
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Those L92 heads are a great bang for thebuck, impressed.
Google LSx454. Now I really hate my wimpy Gen 1 motor
Google LSx454. Now I really hate my wimpy Gen 1 motor