Another turbo LM7 noob question session.
Thread Starter
Teching In
Joined: Apr 2010
Posts: 44
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Another turbo LM7 noob question session. Im doing a turbo LM7 setup and i have a few questions..
First off here are the mods i plan on doing to the motor
LM7
ARP rod bolts and head bolts
Z06 cam
Z06 intake
6.0 truck heads
80LB injectors for e85
front mount single TC76
intercooler
boost around 10-12 LBS
Since the setup will just be replacing the LS1 in my 99 z28 becuase i want to be able to use my wiring harness and drive my car while im building the motor.. i was wondering if i could buy the entire kit from eGay for around 1000$ and just ditch the BOV, intercooler and turbo. Since all im really looking for is the piping...
Theoretically... will that kit fit on an LM7 going in a fbody? And instead of using the turbo and BOV and intercooler that come with the kit would you be able to use the merge pipe with a TC76? I'd also be buying a better BOV and intercooler
First off here are the mods i plan on doing to the motor
LM7
ARP rod bolts and head bolts
Z06 cam
Z06 intake
6.0 truck heads
80LB injectors for e85
front mount single TC76
intercooler
boost around 10-12 LBS
Since the setup will just be replacing the LS1 in my 99 z28 becuase i want to be able to use my wiring harness and drive my car while im building the motor.. i was wondering if i could buy the entire kit from eGay for around 1000$ and just ditch the BOV, intercooler and turbo. Since all im really looking for is the piping...
Theoretically... will that kit fit on an LM7 going in a fbody? And instead of using the turbo and BOV and intercooler that come with the kit would you be able to use the merge pipe with a TC76? I'd also be buying a better BOV and intercooler
Last edited by notoriousdoa; Dec 7, 2010 at 07:00 PM.
First you might wanna double check on the injectors. The 80lbs are gonna be right at max with e85 with 10-12lbs.
The ONLY ebay kit I would ever buy is the PTK Clone kit. Doesn't come with turbo,wastegate,bov that I KNOW of. 600-800 shipped
Buy the 4" thick intercooler kit with 3" piping. 250.00 or so shipped
RPS has a Budget BOV that works great 100.00
jgs 44mm or and 38mm gate for 270.00 or so would work fine
Everything else your gonna piece together. Add it all up then take it times two.
Lm7 should fit right in.
Good Luck
The ONLY ebay kit I would ever buy is the PTK Clone kit. Doesn't come with turbo,wastegate,bov that I KNOW of. 600-800 shipped
Buy the 4" thick intercooler kit with 3" piping. 250.00 or so shipped
RPS has a Budget BOV that works great 100.00
jgs 44mm or and 38mm gate for 270.00 or so would work fine
Everything else your gonna piece together. Add it all up then take it times two.
Lm7 should fit right in.
Good Luck
Thread Starter
Teching In
Joined: Apr 2010
Posts: 44
Likes: 0
First you might wanna double check on the injectors. The 80lbs are gonna be right at max with e85 with 10-12lbs.
The ONLY ebay kit I would ever buy is the PTK Clone kit. Doesn't come with turbo,wastegate,bov that I KNOW of. 600-800 shipped
Buy the 4" thick intercooler kit with 3" piping. 250.00 or so shipped
RPS has a Budget BOV that works great 100.00
jgs 44mm or and 38mm gate for 270.00 or so would work fine
Everything else your gonna piece together. Add it all up then take it times two.
Lm7 should fit right in.
Good Luck
The ONLY ebay kit I would ever buy is the PTK Clone kit. Doesn't come with turbo,wastegate,bov that I KNOW of. 600-800 shipped
Buy the 4" thick intercooler kit with 3" piping. 250.00 or so shipped
RPS has a Budget BOV that works great 100.00
jgs 44mm or and 38mm gate for 270.00 or so would work fine
Everything else your gonna piece together. Add it all up then take it times two.
Lm7 should fit right in.
Good Luck
Im looking with 550-600 to the rear tires. Dont worry, i plan on doing a new rear by the time all this happens
at 140 KPA i was at 77% IDC
and 85% at 190 KPA
interestingly enough, at some point i hit 198.8 KPA and IDC was only 75%, i dont know. my other fuel might have kicked on at that point. I should really log FP so i can know for sure. anyways, good luck with your build
and 85% at 190 KPA
interestingly enough, at some point i hit 198.8 KPA and IDC was only 75%, i dont know. my other fuel might have kicked on at that point. I should really log FP so i can know for sure. anyways, good luck with your build
Last edited by JAX04; Dec 7, 2010 at 07:32 PM.
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Do an intercooler, 11lbs will spike IAT's quick.
80lb injectors on e85 we've pushed to 790rwhp when they finally ran out(along with the pumps), I've made 686rwhp on 18lbs, stock heads, small cam, L33, TC78 on 80lb injectors. You WON'T max out the injectors at 10-12lbs.
No reason to swap the heads, leave the stock heads on it, the rods will bend before you need to go to a different head with e85.
80lb injectors on e85 we've pushed to 790rwhp when they finally ran out(along with the pumps), I've made 686rwhp on 18lbs, stock heads, small cam, L33, TC78 on 80lb injectors. You WON'T max out the injectors at 10-12lbs.
No reason to swap the heads, leave the stock heads on it, the rods will bend before you need to go to a different head with e85.
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Thread Starter
Teching In
Joined: Apr 2010
Posts: 44
Likes: 0
For fuel using dual 255's with 60# injectors would be fine right? I also talked to the local STL tuner for the gen 3 motors and he told me to ditch the MAF and go with a 2 bar setup off of a GTP because of the large airflow i'd be getting through it.
2 Bar is a good idea, lol @ 2 bar from teh GTP, thats what i did, made an adapter and hooked it up. Works like a champ.
serisoulsy, if you are staying gas, the 60s will work to around 600whp, i wouldnt push them much past that.
if going E85, get a minimum of 80lb injectors.
dual walbros are good to around 700-800 on E85 IIRC.
serisoulsy, if you are staying gas, the 60s will work to around 600whp, i wouldnt push them much past that.
if going E85, get a minimum of 80lb injectors.
dual walbros are good to around 700-800 on E85 IIRC.
Reading on here people are making 1000whp w/ twin walbro 255's on E85
I wouldn't recommend an intercooler for this application. First the ebay intercoolers don't work that well, secondly you are introducing unneeded pressure drop into you combo, third you are adding unnecesary length to your coldside piping, fourth, its adding weight to the front end and fifth, the money can be better spent elsewhere.
People used to run roots blowers on gas at 11psi with no intercooler and they put a lot more heat in the air. With alcohol and an efficient turbo at 11 psi you should save your money
People used to run roots blowers on gas at 11psi with no intercooler and they put a lot more heat in the air. With alcohol and an efficient turbo at 11 psi you should save your money
I wouldn't recommend an intercooler for this application. First the ebay intercoolers don't work that well, secondly you are introducing unneeded pressure drop into you combo, third you are adding unnecesary length to your coldside piping, fourth, its adding weight to the front end and fifth, the money can be better spent elsewhere.
People used to run roots blowers on gas at 11psi with no intercooler and they put a lot more heat in the air. With alcohol and an efficient turbo at 11 psi you should save your money
People used to run roots blowers on gas at 11psi with no intercooler and they put a lot more heat in the air. With alcohol and an efficient turbo at 11 psi you should save your money
https://ls1tech.com/forums/14154097-post11.html
Thats from one of my post
https://ls1tech.com/forums/forced-in...-hp-limit.html
I dont care if He or she or someone she or he knows was able to do it.
Safely the walbro 255 is a good to 600whp + or - on gas, two is 1200ish. 30% decrease for E85 will put you around 840whp.
Now that is the edge of those pumps. triple, Single huge (a1000, magnafuel etc)
Im not saying that it WILL NOT WORK, but im saying that the pumps are rated to that, Just becuase you can run your injectors past 80% IDC doesnt make it smart. Just saying. Not trying to be a dick, but letting you know where im coming from, and alot of others.
I get my info from people like lonnies and i tend to trust them. I was told not to try and go past 750whp on dual walbros with E85, so im not.
What do you have to back this claim up? Where does your logic come from? Myself and several other people on here have had great success with ebay intercoolers. I also think it would be dumb not to run one. They are cheap and easy to mount.
https://ls1tech.com/forums/14154097-post11.html
Thats from one of my post
https://ls1tech.com/forums/forced-in...-hp-limit.html
https://ls1tech.com/forums/14154097-post11.html
Thats from one of my post
https://ls1tech.com/forums/forced-in...-hp-limit.html
have you done a before-after intercooler test to see how much pressure drop the cheap ebay intercoolers introduce into the system?
Thread Starter
Teching In
Joined: Apr 2010
Posts: 44
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so 5.3 heads with new valves and springs or 6.0 heads with new valves and springs for a lower CR?
ALSO.. plan on doing a turbo 400 trans with a decent stall (4000)
does/can the turbo 400 stall have a lockup on it like a 4l60? Like where the trans locks the stall after 45MPH? Or am i stuck with a crazy stall and 3 gears at 70MPH? I might just save up some money once this project gets rolling for a junkyard 4L80E
ALSO.. plan on doing a turbo 400 trans with a decent stall (4000)
does/can the turbo 400 stall have a lockup on it like a 4l60? Like where the trans locks the stall after 45MPH? Or am i stuck with a crazy stall and 3 gears at 70MPH? I might just save up some money once this project gets rolling for a junkyard 4L80E
Last edited by notoriousdoa; Dec 8, 2010 at 06:12 PM.
If you are going cheap, the Master power turbos are the cheap guy's choice, although they are physically bigger. If you must stay with the small TC turbos, I'd go with the TC78. As I said before, the TC76 is small on the exhaust side. With an auto, you can go with something like a PT88 since it's not too big. Size might be an issue with an eGay kit though. Send a PM to 98Z28CobraKiller. He will tell you all about his success with a PT88 on a stock 6.0. All you need is a good converter and it'll be no problem. Much easier with an auto than 6 speed.
Any kit that will fit on an LS1 f-body.
***edit: here is what he said about an 88 on a 346
I went 10's with a bone stock LQ9 (including the cam) and a PT88 in a 3800# car. Personally, I'd think that the PT88 would go perfect with a 347. It's a little undersized for a properly setup 370 IMO. It wont start spool until 4000+RPM though so it will feel laggy with a stick shift car. With an auto and a nice converter, it would move out nicely.
Last edited by WSsick; Dec 8, 2010 at 06:32 PM.