notoriousdoa

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

71 chevy

iTrader: (18)

Stick with the 5.3 heads if you are going to run e85.
Also, skip the intercooler since you are running e85 at only 11 psi.

71 chevy

iTrader: (18)

Stick with the 5.3 heads if you are going to run e85.
Also, skip the intercooler since you are running e85 at only 11 psi.

Orangemagic

iTrader: (2)

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

notoriousdoa

I might stick with 60#'s and 93 pump gas.. im still up in the air with what kind of fuel im doing. I just know i want to stay around 10lbs with the stock bottom end on that LM7

Im looking with 550-600 to the rear tires. Dont worry, i plan on doing a new rear by the time all this happens

JAX04

iTrader: (17)

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

Orangemagic

iTrader: (2)

www.rceng.com

This will get you an injector size. If your doing e85 use .85 or so for your BSFC

skinnies

iTrader: (33)

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.

1972nova

iTrader: (13)

My setup is about the same except a mp t76 q trim, I am running 317 heads and e85 and 83lb injectors. I say roll with it

notoriousdoa

what numbers are you putting down? what boost?

1972nova

iTrader: (13)

no numbers yet, not until spring hope to run 15+ psi with 620+whp

notoriousdoa

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.

JAX04

iTrader: (17)

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.

pwrtrip75

iTrader: (8)

My friends car has a 5.3L w/ 6.0 heads... 60# injectors, and 15psi they are about at their limit. 80# would be perfect.



My 5.3 made 640whp w/ 60# inj on gasoline with room to grow.

Reading on here people are making 1000whp w/ twin walbro 255's on E85

71 chevy

iTrader: (18)

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

pwrtrip75

iTrader: (8)

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

JAX04

iTrader: (17)

I would never in a million years try to support then750whp on E85 with twin walbros.

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.

71 chevy

iTrader: (18)

he is running alcohol and only 11 psi boost. he does not need an intercooler.

have you done a before-after intercooler test to see how much pressure drop the cheap ebay intercoolers introduce into the system?

notoriousdoa

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

WSsick

iTrader: (13)

What happened to the turbo fox Kyl? Just so you know, some LM7s came with 243s (799 casting # though) so I stand by what I said earlier with the 317 heads. I would just buy a whole cam kit and go through the valvetrain, but thats just me. Springs are a must. I know where you can get an LS6 cam (& springs I think) for cheap. Valve job is unnessecary money, since you seem to be staying cheap.

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